BLM15PX121BH1, Murata Surface Mount Chip Ferrite Bead

1. Core Specifications

Package: 0402 (1.0×0.5×0.5mm, 1005 size).Impedance: 120Ω @ 100MHz (±25%).Rated Current: 2A @ 85℃, maximum 3A (transient).DC Resistance (Rdc): ≤0.055Ω (low loss).Temperature Range: -55℃ ~ +150℃ (BH series, high temperature resistant).Certification: AEC-Q200 (Automotive reliability grade).

2. Functions

Power line EMI noise suppression: Specially filters high-frequency interference on power lines such as switching ripple and RF noise, ensuring stable operation of rear-end chips.Low loss & high current: Ultra-low DC resistance with low heat generation at 2A operating current, suitable for high-current scenarios including DC-DC output, automotive power supply and industrial power supply.No grounding required: Can be simply connected in series on power lines, independent of stable ground wiring for flexible layout design.Spike / surge suppression: Presents pure resistive characteristics at high frequency, reduces resonance and avoids distortion of power waveform.

3. Application Scope

Automotive Electronics (Core Application)

Powertrain system (ECU, BMS); Safety system (ADAS, camera, radar).Power filtering for automotive central control, infotainment system, LED vehicle lights and navigation modules.

Industrial & Consumer Electronics

Noise suppression for 12V/5V/3.3V power rails on server/mainboard, SSD and hard disk power lines.High-current power lines for routers/switches, smart home devices, wearable devices and drones.

Design Constraints

DC power lines with operating temperature ≤150℃, working current ≤2A and high reliability requirements (AEC-Q200 automotive grade).

4. Part Number Explanation

BLM: Series (Chip Ferrite Bead)15: Dimension 1.0×0.5mm (0402 package)PX: High-current & low-resistance series121: Impedance 120Ω (12×10¹)BH1: -55℃～150℃, automotive high-temperature resistant version