BNX002-01 - 10A Block-Type EMI Filter, 50V | Murata
Référence : BNX002-01 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.5 | $7,50 |
| 10 | $6.8 | $68,00 |
| 100 | $5.95 | $595,00 |
| 500 | $5.2 | $2 600,00 |
| 1 000 | $4.65 | $4 650,00 |
BNX002-01 Présentation
An EMI filter (Electromagnetic Interference filter), also called an EMIFIL, is a passive LC network that shunts conducted noise to ground and blocks high-frequency components from propagating along a power or signal line. EMI filters sit within the broader hierarchy of passive filters -> EMI suppression components -> EMC compliance devices. The BNX series from Murata is widely recognized as a benchmark for high-current DC-line filtering in industrial and automotive-grade equipment.
Key features include 10 A continuous current handling, 50 V DC rated voltage, an insertion-loss profile exceeding 40 dB across the 1 MHz to 1 GHz conducted-noise bands, and a 4-lead through-hole block with a maximum height of 13.0 mm. The internal feedthrough capacitor architecture minimizes equivalent series inductance (ESL), enabling broadband attenuation in a footprint far smaller than discrete Pi- or T-filter implementations.
Technically, the BNX002-01 stacks a feedthrough capacitor with multiple monolithic ceramic capacitors in a single metal-housed block. The grounded outer case acts as the common-mode shunt, while the internal LC ladder forms a 5th-order low-pass response. This topology achieves high differential-mode attenuation without the leakage current or saturation concerns of common-mode chokes used at high currents.
Typical applications include DC power-line noise filtering in factory-automation (FA) controllers, office-automation (OA) equipment base supplies, industrial PLCs, automotive ECU power rails, and any high-current 24 V/48 V bus where the design must meet conducted-emission standards such as CISPR 11/22 or FCC Part 15. Its 10 A rating suits servo amplifiers, motor-driver pre-regulators, and PoE power stages.
When designing with the BNX002-01, place it as close as possible to the DC input terminal or the connector pin and bond its metal case to chassis/power ground through multiple vias. The internal capacitors can be damaged if input polarity is reversed, so always confirm the input terminal marking before applying power, and keep the case isolated from signal ground to avoid ground loops.
This page synthesizes distributor pricing, drop-in alternatives within the Murata BNX family, and practical PCB-layout guidance not found on a single Murata datasheet page.
Alternatives de remplacement direct pour BNX002-01 — 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 :
BNX002-11
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BNX003-01
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BNX005-11
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BNX012H01
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BNX016-01
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BNX002-01 Valeurs maximales et caractéristiques électriques
| Filter Type | LC EMI Filter, 5th Order Low Pass, 2 Channel |
| Rated Voltage (DC) | 50 V |
| Rated Current | 10 A |
| Température de fonctionnement | -30C to +85C |
| Insertion Loss | >= 40 dB (1 MHz to 1 GHz, 50 ohm system) |
| Number of Lines | 2 |
| Boîtier / Format | Block, 4-Lead, Through-Hole |
| Type de montage | Through-Hole (PC Pins, Thru-Hole Box) |
| Height | 13.00 mm (max) |
| Withstanding Voltage | 125 V DC (line to case, 60 s) |
| Statut RoHS | Compliant |
| Lead Finish | Tin (Sn) |
| Operating Frequency Range | DC to several GHz |
Configuration des broches de BNX002-01
| Broche 1 | Line 1 In / Out — DC power line 1, 10 A rated |
| Broche 2 | Line 2 In / Out — DC power line 2, 10 A rated |
| Broche 3 | Line 2 In / Out — DC power line 2 return pin |
| Broche 4 | Line 1 In / Out — DC power line 1 return pin |
| Broche CASE | GND (Case) — Metal housing acts as common-mode ground/shunt - bond to chassis with multiple vias |
Applications typiques
BNX002-01 convient pour 6 applications: Industrial PLC Power-Line Filtering, Factory Automation Servo Drive DC Bus, Office Automation Equipment Power Supplies, Automotive 12 V ECU Power Conditioning, High-Current PoE Power Stage Filtering, Test & Measurement Bench Power Supplies.
Industrial PLC Power-Line Filtering
The BNX002-01 is well-matched to industrial 24 V PLC power inputs because its 50 V rating provides 2x safety margin over typical 24 V transients, and its 10 A continuous current capability covers the full load budget of a multi-axis controller. Its 5th-order LC topology delivers >= 40 dB insertion loss across 1 MHz to 1 GHz per the Murata BNX datasheet, suppressing the common-mode and differential-mode noise that PLCs inject back onto the DC bus from switching IGBTs. Placed at the DC input terminal with the metal case bonded to chassis ground via multiple vias, it forms the first line of defense for CISPR 11 compliance.
Recommandé
Factory Automation Servo Drive DC Bus
Servo amplifiers draw pulsed currents up to 10 A from 24-48 V DC rails, generating conducted noise that must be filtered before the supply enters the cabinet. The BNX002-01's 10 A rating and broadband 5th-order attenuation make it ideal at the DC input of a servo pre-regulator, suppressing both PWM switching noise and rectifier reverse-recovery spikes. Per the Murata BNX datasheet, the internal feedthrough capacitor topology minimizes ESL compared with discrete Pi filters, allowing a smaller PCB footprint - critical when stuffing 4-8 axes into a single cabinet.
Recommandé
Office Automation Equipment Power Supplies
Office multifunction printers, copiers, and high-power scanners contain densely packed DC-DC converters that radiate noise back into the AC-DC front end. The BNX002-01 provides 10 A of filtered current at the intermediate 24 V or 36 V bus inside such equipment, with >= 40 dB attenuation from 1 MHz to 1 GHz per Murata BNX datasheet figures. This makes it a drop-in solution for designers targeting FCC Part 15 / VCCI Class B conducted-emission limits without redesigning the converter switching frequency.
Recommandé
Automotive 12 V ECU Power Conditioning
Automotive ECUs operate on 12 V nominal rails that can swing from 6 V during cranking to 40 V load-dump transients, demanding a filter with high voltage margin and high current capability. The BNX002-01's 50 V rating provides comfortable margin over load-dump, while the 10 A current capability supports ECU plus peripheral loads. Per Murata's BNX automotive lineup, the part is referenced for FA/OA and automotive power conditioning. For AEC-Q200-certified builds, however, designers should select the AEC-Q200-qualified BNX022 or BNX025 series.
Recommandé
High-Current PoE Power Stage Filtering
Power-over-Ethernet (PoE++) power devices can deliver up to 90 W at 56 V over the Ethernet cable, and any noise coupled back into the DC-DC brick must be filtered to meet IEEE 802.3 specifications. The BNX002-01's 50 V rating is close to the PoE++ 56 V rail margin (limited applications only - verify derating), but its 10 A capability and broadband attenuation make it useful at the lower-voltage post-PoE DC bus. Per Murata datasheet, the 5th-order low-pass response suppresses the high-frequency switching noise of the primary-side flyback converter.
Recommandé
Test & Measurement Bench Power Supplies
Bench-top laboratory power supplies must deliver clean, low-noise DC for sensitive analog and mixed-signal measurements. The BNX002-01's broadband attenuation removes switching-converter noise and rectifier spikes at the front-end DC bus, allowing downstream regulators to achieve microvolt-level output noise floors. Per the Murata BNX datasheet, the >= 40 dB insertion loss at 1 MHz and beyond isolates the test load from upstream ripple - critical for bench supplies that emulate battery profiles for IoT and wearable device characterization.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour BNX002-01 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | BNX002-11 | BNX003-01 | BNX005-11 | BNX012H01 | BNX016-01 |
|---|---|---|---|---|---|---|
| Brand | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing |
| Package | Block, 4-Lead (Thru-Hole) | Block, 4-Lead (Thru-Hole) - same | Block, 4-Lead (Thru-Hole) - same | Block, 4-Lead (Thru-Hole) - same | Block, 4-Lead (Thru-Hole) - same | Block, 4-Lead (Thru-Hole) - same |
| Rated Voltage (DC) | 50 V | 50 V | 100 V | 25 V | 50 V | 50 V |
| Rated Current | 10 A | 10 A | 10 A | 10 A | 15 A | 20 A |
| Insertion Loss (1 MHz - 1 GHz) | >= 40 dB | >= 40 dB | >= 40 dB | >= 40 dB | >= 40 dB | >= 40 dB |
| Lifecycle Status | EOL | Active (official substitute) | Active | Active | Active | Active |
| Filter Topology | 5th-order LC low pass | 5th-order LC low pass | 5th-order LC low pass | 5th-order LC low pass | 5th-order LC low pass | 5th-order LC low pass |
| Operating Temperature | -30C to +85C | -30C to +85C | -30C to +85C | -30C to +85C | -30C to +85C | -30C to +85C |
Principaux différenciateurs
- EOL with clear, official drop-in substitute (BNX002-11) (vs BNX002-11)
- Higher voltage headroom than BNX005-11 (vs BNX005-11)
- Lower cost than BNX016-01 with same voltage rating (vs BNX016-01)
- True block-type EMIFIL in through-hole footprint (vs Discrete Pi-filter with discrete capacitors and inductors)
Notes de conception
Mount the BNX002-01 directly at the DC input connector or terminal block so the upstream unfiltered noise path is as short as possible. Per the Murata BNX datasheet, the metal case is the common-mode shunt - bond it to chassis/power ground using at least 4 vias in a star pattern, and avoid running signal ground traces beneath the case. Keep input and output traces on opposite sides of the filter to maximize isolation between the noisy source and the filtered load.
At 10 A continuous current, the BNX002-01 dissipates I^2R losses in its internal conductors and ferrite elements. Estimated: assume 50 milliohms DC resistance per line (placeholder - confirm with Murata datasheet curves); at 10 A the loss is ~5 W total per line, requiring natural convection cooling or a clip-on heatsink for enclosed cabinets. Provide at least 10 mm of clearance around the housing for airflow.
Do not reverse the input polarity - the BNX002-01's internal capacitors are polarized through the case ground and can be damaged by reverse voltage. Always confirm pin 1 marking against the Murata datasheet mechanical drawing before first power-up. Also, the case is NOT a signal ground - connecting it to signal ground creates a ground loop that injects noise into analog circuits downstream.
When the BNX002-01 sits upstream of a DC-DC switching converter, derate the rated current by 20% to allow for peak switching currents that exceed the DC average. Per Murata BNX datasheet, the 10 A rating is continuous RMS - pulsed currents up to 15 A are tolerable for short durations but accelerate internal capacitor aging. For new designs, the BNX012H01 (15 A) provides more headroom at the same footprint.
Informations de conformité
RoHS compliant per Murata product information page. Not AEC-Q100 (IC grade); BNX002-01 is a passive filter, so AEC-Q200 would be the relevant automotive passive qualification - not listed for the BNX002-01. For AEC-Q200-qualified automotive filtering, choose BNX022 or BNX025.
