Murata BLM18KG121TN1D Chip Ferrite Bead: Model Information

Overview

The Murata BLM18KG121TN1D is a chip ferrite bead designed for use in DC power lines. It is part of the BLM18 series, which is suitable for a variety of applications including consumer and industrial equipment.

Model Information

• Series: BLM18
• Model Number: BLM18KG121TN1D
• Impedance at 100 MHz: 120 Ω ± 25%
• Rated Current: 3000 mA (at 85°C), 1900 mA (at 125°C)
• DC Resistance (Max.): 0.030 Ω (initial value), 0.040 Ω (after testing)
• Operating Temperature Range: -55°C to +125°C
• Storage Temperature Range: -55°C to +125°C
• Packaging: Tape and Reel (4000 pcs/reel)
• Performance Category: For DC power line (thin type)

Applications

• Power Equipment: Renewable energy, energy storage, EV charging
• Industrial Equipment: Base stations, manufacturing equipment, industrial robotics, measurement equipment
• Medical Equipment: Class C (excluding implant/surgery/auto injector)
• Consumer Equipment: Home appliances, audio/visual, communication, information, office equipment, household robotics

Electrical Specifications

• Impedance Measurement:Measuring Equipment: Keysight 4991A or equivalentMeasuring Frequency: 100 MHz ± 1 MHzMeasuring Fixture: Keysight 16192A or equivalent
• DC Resistance Measurement:Measuring Equipment: Digital multimeter or Yokogawa 755611 or equivalentMeasuring Fixture: Keysight 16044A or equivalent

Mechanical Specifications

• Shear Test:Applying Force: 6.8 NHolding Time: 5 s ± 1 s
• Bending Test:Test Substrate: Glass-epoxy (100 mm × 40 mm × 1.6 mm)Pressurizing Speed: 0.5 mm/sDeflection: 1.0 mmHolding Time: 30 s
• Vibration:Oscillation Frequency: 10 Hz to 55 Hz to 10 Hz (approx. 1 min)Total Amplitude: 1.5 mmTest Time: 2 hours per direction (total 6 hours)
• Resistance to Soldering Heat:Flux: Ethanol solution with 25% rosin contentPre-heating: 150°C ± 10°C for 60 s to 90 sSolder: Sn-3.0Ag-0.5CuSolder Temperature: 270°C ± 5°CImmersion Time: 10 s ± 0.5 sPost-treatment: Room condition for 48 h ± 4 h

Environmental Specifications

• Temperature Cycle:Single Cycle Conditions:Step 1: -55°C (+0°C, -3°C) for 30 min ± 3 minStep 2: Ordinary temperature for 10 min to 15 minStep 3: +125°C (+3°C, -0°C) for 30 min ± 3 minStep 4: Ordinary temperature for 10 min to 15 minNumber of Cycles: 100Post-treatment: Room condition for 48 h ± 4 h
• Humidity:Temperature: 40°C ± 2°CHumidity: 90% (RH) to 95% (RH)Test Time: 1000 h (+48 h, -0 h)Post-treatment: Room condition for 48 h ± 4 h
• Heat Life:Temperature: 125°C ± 3°C (85°C ± 3°C if exceeding rated current 1A)Applied Current: Rated current at test temperatureTest Time: 1000 h (+48 h, -0 h)Post-treatment: Room condition for 48 h ± 4 h
• Cold Resistance:Temperature: -55°C ± 2°CTest Time: 1000 h (+48 h, -0 h)Post-treatment: Room condition for 48 h ± 4 h

Packaging Specifications

• Tape Dimensions:Width: 8 mmPaper Tape (BLM18KG121TN1D):A: 1.05 mm ± 0.1 mmB: 1.85 mm ± 0.1 mmt: 0.85 mm max.
• Taping Specifications:Packing Quantity: 4000 pcs/reelPacking Method: Products are placed in cavities of a carrier tape and sealed by a cover tapeFeed Hole Position: On the right side when the cover tape is pulled toward the userJoint: SeamlessMissing Products: Within 0.025% of the number per reel or 1 pc., whichever is greater, and not continuous

Precautions

• Limitation of Applications: Not suitable for applications requiring high performance, function, quality, or safety, such as aircraft, aerospace, undersea, power plant control, medical, transportation, traffic control, disaster prevention/security, industrial data-processing, combustion/explosion control, or equivalent complex/reliable equipment.
• Precautions on Rating: Avoid using in exceeded the rated temperature range, rated voltage, or rated current.
• Inrush Current: Significant inrush current can cause overheating, wire breakage, burning, or other serious faults.
• Corrosive Gas: Avoid use in environments with corrosive gases (sulfur gas, chlorine, ammonia, etc.) or oils (cutting oil, silicone oil, etc.).

Handling and Storage

• Storage Period: Use within 6 months after delivery. Check solderability if stored for more than 6 months.
• Storage Conditions:Temperature: -10°C to +40°CHumidity: 15% to 85% RHAvoid direct sunlight, heat, vibration, and bulk storage.
• Transportation: Avoid excessive vibration and impact to maintain product reliability.

Soldering and Mounting

• Soldering Conditions:Pre-heating: 150°C to 180°C for 90 s ± 30 sHeating: Above 220°C for 30 s to 60 sPeak Temperature: 245°C ± 3°CNumber of Reflow Cycles: 2 times
• Reworking: Maximum 2 reworking operations with a soldering iron at 350°C max. tip temperature and 3 s soldering time.
• Mounting Conditions: Ensure proper land dimensions and avoid mechanical stress due to board warping or separation.