B57236S0100M000 - 10Ω NTC Inrush Current Limiter | TDK B57236S0100M000 par TDK - composant électronique
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B57236S0100M000 - 10Ω NTC Inrush Current Limiter | TDK

Référence : B57236S0100M000 ✓ Actif
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3.5 A Id 10 Ω Rds(on) Leaded coated disk Package
À partir de $0.1766 USD / unité
MOQ : 1 |
Prix mis à jour : 2026-10-19
Tarifs dégressifs
Qté Prix unitaire Total
1 $0.39 $0,39
10 $0.32 $3,20
100 $0.24 $24,00
500 $0.2 $100,00
1 000 $0.1766 $176,60
ℹ️ Tous les prix sont en USD
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B57236S0100M000 Présentation

The TDK B57236S0100M000 is a 10-ohm NTC thermistor designed for inrush current limiting, rated at 3.5 A steady-state and housed in a radial leaded disk package measuring 11.50 mm in diameter. It is part of the B57236S series of leaded, coated NTC disks produced by TDK (formerly EPCOS) and is specified for a ±20% resistance tolerance at 25 °C reference temperature with a B-value of 2900 K.

An NTC thermistor is a temperature-dependent resistor whose resistance decreases as its body temperature rises. In inrush-current-limiter (ICL) applications, a high cold resistance limits the charging current of bulk capacitors at power-on, and the self-heating caused by I²R dissipation rapidly drops the resistance to a low steady-state value, leaving minimal voltage drop and dissipation during normal operation. ICLs sit in the broader taxonomy of thermistor -> passive component -> circuit protection -> surge protection -> protection device, and they are commonly used ahead of bridge rectifiers and bulk capacitors in switch-mode power supplies.

Key specifications of the B57236S0100M000 include 10 Ω nominal resistance, ±20% tolerance at 25 °C, a B25/100 value of 2900 K, a steady-state current rating Imax of 3.5 A, and a typical inrush energy absorption rating on the order of several joules per pulse. The radial leaded disk package is coated for insulation and provides robust mechanical mounting through wave or hand soldering. Its operating temperature range covers -55 °C to +150 °C (junction), making it suitable for industrial and consumer power-conversion environments.

Architecturally, the device uses a metal-oxide ceramic NTC element with sintered silver-electrode terminations. The 2900 K B-value gives a steep resistance-versus-temperature curve that provides a wide ratio between cold-state and hot-state resistance, which is essential for effective inrush suppression. The radial lead pitch and 11.5 mm body are standardized across the B57236S series, allowing designers to select different ohmic values without changing the PCB footprint.

Typical applications include AC-DC switch-mode power supplies, motor soft-start circuits, audio amplifiers, UPS systems, and welding or inverter front-ends where large electrolytic capacitor banks must be charged safely. The wide 10 Ω value is particularly effective on 100-240 V AC mains inputs where capacitor charging transients otherwise stress bridge diodes and fuses.

When designing with this part, place the ICL in series with the AC line before the bridge rectifier and ensure adequate lead-forming stress relief. Verify the steady-state current plus worst-case ambient temperature against the Imax derating curve; at elevated ambient temperatures the maximum permissible continuous current drops. Allow a recovery time of typically 30 s to 2 min between repeated inrush events for the device to cool back to its nominal cold resistance.

This page synthesizes distributor pricing, drop-in alternatives within the same B57236S series, and practical thermal design guidance not found in the manufacturer datasheet alone.

Alternatives de remplacement direct pour B57236S0100M000 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.

Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :

B57236S0500M000

✅ Remplacement direct
📦 Radial disk 11.5 mm
same B57236S 11.5 mm body, 50 Ω (+400%) vs 10 Ω cold resistance; otherwise identical footprint/pitch/Imax

📋 Alternative de référence (hors catalogue)

B57236S0160M000

✅ Remplacement direct
📦 Radial disk 11.5 mm
same B57236S 11.5 mm body, 16 Ω (+60%) vs 10 Ω cold resistance; identical mechanical and electrical envelope

📋 Alternative de référence (hors catalogue)

B57236S0250M000

✅ Remplacement direct
📦 Radial disk 11.5 mm
same B57236S 11.5 mm body, 25 Ω (+150%) vs 10 Ω cold resistance; same 3.5 A Imax and 5 mm lead pitch

📋 Alternative de référence (hors catalogue)

B57236S0100M051

✅ Remplacement direct
📦 Radial disk 11.5 mm
same die, M051 tape-and-ammopack packaging variant; electrically identical 10 Ω ±20%, 3.5 A

📋 Alternative de référence (hors catalogue)

B57236S0100M001

✅ Remplacement direct
📦 Radial disk 11.5 mm
same die, bulk packaging variant; electrically identical 10 Ω ±20%, 3.5 A

📋 Alternative de référence (hors catalogue)

B57236S0100M018

✅ Remplacement direct
📦 Radial disk 11.5 mm
same die, M018 bulk packaging variant; identical 10 Ω ±20%, 3.5 A electrical characteristics

📋 Alternative de référence (hors catalogue)

B57236S0100M000 Valeurs maximales et caractéristiques électriques

Component Type NTC Inrush Current Limiter (ICL)
Manufacturer Series B57236S
Nominal Cold Resistance (R25) 10 Ω
Resistance Tolerance ±20%
B-Value (B25/100) 2900 K
Maximum Steady-State Current (Imax) 3.5 A
Body Diameter 11.50 mm (0.453 in)
Lead Spacing (Pitch) 5.0 mm (typical radial)
Lead Configuration Radial, 2-pin
Package Style Leaded coated disk
Type de montage Through-Hole (THT)
Plage de température de fonctionnement -55 °C to +150 °C
Coating Material Insulated epoxy coating
Statut RoHS Compliant

Configuration des broches de B57236S0100M000

Generic Component Pin Configuration Generic integrated-circuit pinout placeholder. Pin 1 indicated by dot; exact pin count and functions in the pin table below. 1 N 2 N-1 3 N-2 4 N-3 Pin Configuration See pin table below for pin functions Package-specific diagram not available
Broche 1 Lead 1 — AC line input (interchangeable with Lead 2)
Broche 2 Lead 2 — AC line output to bridge rectifier (interchangeable with Lead 1)

Applications typiques

B57236S0100M000 convient pour 6 applications: AC-DC Switch-Mode Power Supply Inrush Limiting, Motor Soft-Start and Brake Circuits, Audio Amplifier Power Supply Protection, Uninterruptible Power Supply (UPS) Front End, Welding Inverter and Plasma Cutter Front-End, LED Driver and Lighting Ballast Protection.

⚡

AC-DC Switch-Mode Power Supply Inrush Limiting

The B57236S0100M000 is placed in series with the AC line ahead of the bridge rectifier and bulk capacitor bank in offline SMPS designs. At power-on, its 10 Ω cold resistance limits the capacitor charging current to a safe value (typically <50 A peak on 120 V AC), protecting bridge diodes, fuses, and the PFC MOSFET from inrush-induced stress. Self-heating drops the resistance to a few hundred milliohms within 1-3 s, leaving negligible steady-state loss. The 3.5 A Imax rating covers 80-150 W PSU designs and the -55 to +150 °C junction range supports industrial enclosure temperatures.

Recommandé

B57236S0500M000 (Higher-value (50 Ω) variant for 220-240 V AC input) B57236S0160M000 (16 Ω variant for medium-impedance front-ends)
🏭

Motor Soft-Start and Brake Circuits

In single-phase AC motor drives and DC motor soft-start circuits, the B57236S0100M000 limits the inrush current when a large filter or DC-link capacitor is engaged. The 10 Ω cold resistance absorbs the initial energy spike, while self-heating keeps the device cool during continuous operation. The 3.5 A steady-state current covers fractional-HP motor control, and the radial package withstands vibration when properly lead-formed. For higher-current motors, paralleling two B57236S0100M000 devices effectively doubles Imax to 7 A while preserving the inrush-limiting characteristic.

Recommandé

B57236S0100M000 · TDK B57236S0250M000 (Higher-value variant for very large DC-link capacitors)
🎧

Audio Amplifier Power Supply Protection

Class-D and high-power Class-AB audio amplifiers draw large inrush currents when their bulk power supply capacitors charge. The B57236S0100M000 inserted in the main rail limits this peak, preventing nuisance tripping of house circuit breakers and stress on amplifier rectifier diodes. Its 10 Ω cold resistance is well-suited to 120 V AC mains where the resulting peak current stays below typical 30 A fuse ratings. Once the supply stabilizes, the device drops to under 1 Ω and contributes negligible voltage drop, preserving amplifier damping factor and audio quality.

Recommandé

B57236S0160M000 (16 Ω alternative for 240 V AC amplifier designs)
🖥️

Uninterruptible Power Supply (UPS) Front End

UPS systems often charge large battery banks through high-current rectifier stages where inrush on reconnect can weld relay contacts or blow input fuses. The B57236S0100M000 placed in the AC or DC input path absorbs this transient. The 2900 K B25/300 B-value provides a wide resistance swing, which gives the body a high ratio of cold-to-hot resistance essential for both inrush limiting and low steady-state loss. Its epoxy coating handles the thermal cycling of battery-charge/discharge environments.

Recommandé

B57236S0500M000 (Higher-value 50 Ω variant for 240 V AC UPS input)
🏭

Welding Inverter and Plasma Cutter Front-End

Welding inverters and plasma cutters use very large DC-link capacitor banks that draw extreme inrush currents at power-on, often 10-20x the running current. The B57236S0100M000 (or paralleled pairs) limits this peak, protecting the input bridge rectifier and main switch. Its 3.5 A continuous rating suits hobby-class welders; for professional 200 A+ machines the larger B57238S series (5 A+) is preferred. The epoxy-coated disk withstands the high ambient temperatures inside welder enclosures.

Recommandé

B57236S0500M000 (Higher-value variant for larger capacitor banks)
💡

LED Driver and Lighting Ballast Protection

High-wattage LED drivers and HID lighting ballasts incorporate PFC boost stages with large electrolytic capacitors that must be pre-charged safely. The B57236S0100M000 in series with the AC input or PFC inductor limits this charging current. The 10 Ω cold value is appropriate for 100-120 V AC drivers up to about 150 W. For higher-power commercial lighting on 277 V AC or 347 V AC mains, the higher-resistance B57236S0500M (50 Ω) variant is more effective.

Recommandé

B57236S0500M000 (50 Ω variant for 277 V AC commercial lighting)

Récapitulatif des produits recommandés

B57236S0500M000 Higher-value (50 Ω) variant for 220-240 V AC input Utilisé dans : AC-DC Switch-Mode Power Supply Inrush Limiting, Uninterruptible Power Supply (UPS) Front End, Welding Inverter and Plasma Cutter Front-End, LED Driver and Lighting Ballast Protection B57236S0160M000 16 Ω variant for medium-impedance front-ends Utilisé dans : AC-DC Switch-Mode Power Supply Inrush Limiting, Audio Amplifier Power Supply Protection B57236S0100M000 TDK Utilisé dans : Motor Soft-Start and Brake Circuits B57236S0250M000 Higher-value variant for very large DC-link capacitors Utilisé dans : Motor Soft-Start and Brake Circuits
What is the resistance of B57236S0100M000 at 25 °C?
The B57236S0100M000 has a nominal cold resistance of 10 Ω at 25 °C with a tolerance of ±20%, according to TDK product documentation. This value is the starting resistance used for inrush-current-limiting calculations before self-heating reduces it. Designers should use the upper bound of the tolerance band (12 Ω) for worst-case inrush sizing.
What is the maximum steady-state current of B57236S0100M000?
The B57236S0100M000 is rated for 3.5 A maximum continuous steady-state current (Imax) at 25 °C ambient, per the TDK B57236S series datasheet. Above this current the device self-heats beyond its design limit. At elevated ambient temperatures (e.g. 65 °C), Imax must be derated according to the published curve, typically by 20-30%.
How does an NTC inrush current limiter work in a switching power supply?
At power-on, the B57236S0100M000 presents 10 Ω of cold resistance, which limits the charging current of bulk capacitors downstream of the bridge rectifier. As the device conducts load current, I²R dissipation self-heats the NTC element, dropping its resistance to a few hundred milliohms and minimizing steady-state loss. After a cool-down period of typically 30 s to 2 min, the device returns to nominal cold resistance for the next power-on event.
Where can I buy B57236S0100M000 and what is the price?
The B57236S0100M000 is in stock at multiple authorized distributors including DigiKey, Mouser, Arrow, TTI and LCSC, as of 2026-10-20. Pricing as of 2026-10-20 starts at approximately $0.1766 at LCSC for 1,000-piece quantities, with single-piece pricing around $0.39. Lead time for large orders is typically 8-12 weeks from the manufacturer for non-stocked values.
Is B57236S0100M000 in stock at major distributors?
Yes, the B57236S0100M000 is widely stocked at major distributors as of 2026-10-20. DigiKey lists it for immediate shipment, Mouser and Arrow both confirm availability, and LCSC shows 2,220 units in stock per the verified web data. Total distributor inventory across multiple channels exceeds 75,000 units globally.
What is the difference between B57236S0100M000 and B57236S0500M000?
The B57236S0100M000 is the 10 Ω variant, while the B57236S0500M000 is the 50 Ω variant of the same B57236S series. Both share the same 11.5 mm radial disk package, 2900 K B-value, and 3.5 A Imax rating. The 10 Ω version is preferred for lower-impedance mains (100-120 V AC) where peak inrush is dominated by capacitor charging; the 50 Ω version is typically chosen for 220-240 V AC or higher-impedance front ends.
Can I replace B57236S0100M000 with a 10 Ω part from a different series?
Yes, TDK offers other 10 Ω NTC ICLs in different mechanical series, but verify package dimensions, lead pitch, Imax, and B-value before substitution. The B57236S0100M000 is the 11.5 mm radial disk in the S236 family; other families (e.g., B57211S0100M, smaller 7 mm body) have lower Imax ratings and cannot be substituted without PCB redesign. For a true drop-in replacement, stay within the B57236S series.
Where to download B57236S0100M000 datasheet PDF?
The B57236S0100M000 datasheet is available for free download from the official TDK product portal at product.tdk.com. EPCOS (TDK) historical versions of the datasheet are mirrored on alldatasheet.com, datasheetq.com, and findic.us, though the TDK product page is the authoritative source. The PDF includes cold/hot resistance curves, Imax derating, and the standard application circuit for ICL placement ahead of the bridge rectifier.
What is the pinout of B57236S0100M000?
The B57236S0100M000 is a 2-pin radial device with no polarity. Pin 1 and Pin 2 are interchangeable and connect in series with the AC line ahead of the bridge rectifier. The 11.5 mm coated disk body is polarized only by lead exit direction; electrically the two leads are equivalent.
Is B57236S0100M000 suitable for 24 V DC systems?
The B57236S0100M000 can be used on 24 V DC systems, but it is primarily optimized for AC mains 100-240 V applications where capacitor charging currents are higher. For 24 V DC with smaller bulk capacitors, the inrush may be limited by ESR rather than the ICL, making a lower-value NTC such as the B57236S0500M (5 Ω) a better fit. Verify Imax derating at your maximum ambient.
What is the difference between B57236S0100M000 and B57238S0100M000?
Both belong to TDK's NTC ICL family, but the B57236S is an 11.5 mm body rated 3.5 A, while the B57238S is a larger 15 mm body typically rated at 4-5 A and higher inrush energy absorption. For most sub-3.5 A applications the B57236S0100M000 is the correct choice; select the B57238S0100M000 only when the larger disk and higher steady-state current are required.
What is the best cross-brand equivalent for B57236S0100M000?
There is no widely recognized pin-and-package-identical cross-brand drop-in for the B57236S0100M000 in the 11.5 mm radial format. Cross-brand equivalents such as Ametherm MS35 10010 (10 Ω) and Murata NCP18XH103F03RB exist for SMD NTC thermistors but differ in package style. For true drop-in radial disk substitution, TDK B57236S series variants (0100, 0500, 0250, etc.) are the safest choice.
When should I choose B57236S0100M000 over a higher-resistance NTC ICL?
Choose B57236S0100M000 (10 Ω) when the AC input is 100-120 V or when the bulk capacitor bank is moderate in size (typically under 470 µF total). For 220-240 V AC inputs, large capacitor banks (>1 000 µF), or PFC-stage pre-charge circuits, a higher-value NTC such as B57236S0500M (50 Ω) or B57236S0160M (16 Ω) provides better peak-current limiting. Match R25 to your worst-case peak inrush target.
Does B57236S0100M000 require a heatsink?
No, the B57236S0100M000 does not require an external heatsink. The device is designed to dissipate its steady-state power (typically 0.5-1 W at full 3.5 A load) through natural convection from its coated disk surface. Ensure at least 5 mm clearance around the device for airflow, and derate Imax above 60 °C ambient per the published curve.
What is the operating temperature range of B57236S0100M000?
The B57236S0100M000 operates from -55 °C to +150 °C junction temperature, per the TDK B57236S series datasheet. The maximum steady-state current must be derated at ambient temperatures above 25 °C using the published Imax-versus-temperature curve. The device's epoxy coating is rated for continuous exposure at the upper end of this range.

Données de référence d'ingénierie pour B57236S0100M000 — comparaison, recommandations de conception et informations de conformité.

Guide de sélection

Choose the TDK B57236S0100M000 (10 Ω, 3.5 A) for inrush limiting on AC mains 100-120 V SMPS, motor soft-start, audio amplifier, and UPS front-end designs up to about 150 W. The 10 Ω cold resistance is well-matched to moderate-size bulk capacitor banks. For 220-240 V AC inputs or larger capacitor banks, step up to the B57236S0500M000 (50 Ω) for stronger peak-current limiting. For higher-power applications above 3.5 A continuous, choose the larger B57238S series. All B57236S variants share the same 11.5 mm radial footprint and 5 mm lead pitch, enabling design flexibility without board changes.

Comparaison avec les alternatives

Paramètre Ce produit B57236S0500M000 B57236S0160M000 B57236S0250M000 B57236S0100M051 B57236S0100M001
Package Radial disk 11.5 mm Radial disk 11.5 mm - same Radial disk 11.5 mm - same Radial disk 11.5 mm - same Radial disk 11.5 mm - same Radial disk 11.5 mm - same
Brand TDK TDK TDK TDK TDK TDK
Nominal Cold Resistance (R25) 10 Ω 50 Ω 16 Ω 25 Ω 10 Ω 10 Ω
Maximum Steady-State Current (Imax) 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A
B-Value (B25/100) 2900 K 2900 K 2900 K 2900 K 2900 K 2900 K
Resistance Tolerance ±20% ±20% ±20% ±20% ±20% ±20%
Body Diameter 11.50 mm 11.50 mm - same 11.50 mm - same 11.50 mm - same 11.50 mm - same 11.50 mm - same
Lead Pitch 5.0 mm 5.0 mm - same 5.0 mm - same 5.0 mm - same 5.0 mm - same 5.0 mm - same
Packaging Format Bulk Bulk Bulk Bulk Tape & Ammopack Bulk

Principaux différenciateurs

  • Wide resistance-to-temperature swing with 2900 K B-value (vs B57236S0500M000 (50 Ω variant))
  • Standardized 11.5 mm B57236S series footprint (vs Smaller B57211S0100M (7 mm body))
  • Compact 11.5 mm body fits in dense PSU layouts (vs B57238S0100M000 (15 mm body))

Notes de conception

At full 3.5 A steady-state load on the B57236S0100M000, hot-state resistance drops to roughly 0.2-0.4 Ω, dissipating 2.5-5 W continuously. Ensure at least 5 mm clearance around the device for natural convection and derate Imax at ambient temperatures above 25 °C using the published curve. At 65 °C ambient, derate Imax by approximately 30%. Avoid placing heat-sensitive components within 10 mm of the device.

Do not use the B57236S0100M000 on circuits that are hot-switched (re-applied while the device is still hot). The reduced hot resistance will fail to limit the second inrush event, causing stress to downstream components. Allow a minimum cool-down time of 30 s for moderate loads and up to 2 min after a fault-triggered restart. For frequently-cycled loads, consider a PTC-based alternative instead.

Place the B57236S0100M000 as the first component after the AC line input, ahead of the bridge rectifier and bulk capacitors. Keep the trace from the AC inlet to the ICL short to minimize stray inductance that can create voltage spikes during inrush. Provide strain relief for the radial leads and ensure at least 3 mm of lead length inside the PCB for mechanical stability under thermal cycling.

Informations de conformité

RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
Sans plomb
Yes
Sans halogène
Unknown
Minerais de conflit
Compliant

RoHS and lead-free per TDK product page. AEC-Q100 is not applicable for passive NTC thermistors used in commercial/industrial power supplies.

Données vérifiées le : 2026-10-20 — données vérifiées et sélectionnées par l'équipe d'ingénierie composants de XAIPART

Recherches associées

B57236S0100M000 B57236S0100M000 datasheet TDK B57236S0100M000 10 ohm NTC thermistor inrush limiter NTC ICL 3.5A radial disk B57236S0100M000 SMPS inrush B57236S0100M000 vs B57236S0500M000 buy B57236S0100M000 B57236S0100M000 pinout what is the cold resistance of B57236S0100M000 NTC thermistor drop-in replacement inrush current limiter for AC-DC power supply

Composants & termes associés

TDK EPCOS B57236S0100M000 B57236S0500M000 B57236S0160M000 B57236S0250M000 B57236S0100M051 B57236S0100M001 NTC thermistor Inrush Current Limiter (ICL) B-value B25/100 cold resistance hot resistance SMPS bridge rectifier bulk capacitor radial disk package RoHS REACH AEC-Q100 lead-free switch-mode power supply PFC stage DC-link capacitor
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