B57236S0100M000 - 10Ω NTC Inrush Current Limiter | TDK
부품 번호: B57236S0100M000 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 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 |
B57236S0100M000 개요
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.
드롭인 대체품: B57236S0100M000 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
B57236S0500M000
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0160M000
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0250M000
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0100M051
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0100M001
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0100M018
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
B57236S0100M000 최대 정격 & 전기적 특성
| 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 |
| 실장 유형 | Through-Hole (THT) |
| 동작 온도 범위 | -55 °C to +150 °C |
| Coating Material | Insulated epoxy coating |
| RoHS 상태 | Compliant |
B57236S0100M000 핀 구성
| 핀 1 | Lead 1 — AC line input (interchangeable with Lead 2) |
| 핀 2 | Lead 2 — AC line output to bridge rectifier (interchangeable with Lead 1) |
일반적인 애플리케이션
B57236S0100M000 적합 용도: 6 애플리케이션s: 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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: B57236S0100M000 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- 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))
설계 노트
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.
규정 준수 정보
RoHS and lead-free per TDK product page. AEC-Q100 is not applicable for passive NTC thermistors used in commercial/industrial power supplies.
