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Bourns FW20A4R70JA Fusible Power Resistor
Bourns FWxxA series fusible power resistors are axial leaded wirewound resistors engineered to provide overcurrent protection by fusing under abnormal conditions. These resistors are designed to safely fuse when exposed to 120 or 240V, preventing damage to the circuit. They find applications in white goods, inverters, lighting, and metering systems. The resistors are RoHS compliant and recognized under UL 1412, ensuring adherence to industry standards. Their construction includes a wirewound resistance element around a ceramic core, tinned copper lead wires, an insulated resin housing, and a coating material meeting UL 94V-0 requirements for enhanced safety.
Bourns FW20A4R70JA Fusible Power Resistor Specifications:
- Power: 1, 2, 3, 5, 7 W
- Resistance Range: 4.7 ohms to 100 ohms (E24 values)
- UL 1412 Recognized Resistance Range: 4.7 ohms to 47 ohms
- Tolerance: 5 %
- Temperature Coefficient: ±200 PPM/°C
- Operating Temperature Range: -55 °C to +155 °C
- Maximum Voltage: √P*R
- Fusing Point: See Fusing Performance Chart
- Fusing Time: See Fusing Performance Chart
- Resistance Code: R represents decimal point (examples: 7R50 = 7.5 ohms)
- Resistance Code (≥100 ohms): First three digits are significant, fourth digit represents number of zeros to follow (example: 1000 = 100 ohms)
- Resistance Tolerance: J = ±5 %
- Packaging (FW10, FW20, FW30): 1,000 pcs./box
- Packaging (FW50, FW70): 500 pcs./box
- Natural Resistance Change: R2-R2 x 106(PPM/°C)
- Short Time Overload: Resistance change rate is ±5 % max.
- Terminal Strength (Direct Load): Resistance to a 2.5 kg direct load for 10 seconds
- Terminal Strength (Twist Test): Bending and rotation test
- Resistance to Soldering Heat: Resistance change rate is ±1 % max.
- Solderability: 95 % coverage minimum
- Load Life in Humidity: Resistance change rate is ±5 % max.
- Safety Fuse (1-5W): Load 120/240 VAC voltage
- Safety Fuse (7W): Load 240 VAC voltage
- Dielectric Withstanding Voltage: No evidence of fashover mechanical damage, arcing or insulation breakdown
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Frequently Asked Questions
Where can I buy Bourns FW20A4R70JA?
You can click on the BUY or RFQ button to purchase FW20A4R70JA from an authorized Bourns distributor.
How do I troubleshoot issues or seek technical support for part FW20A4R70JA?
You can download the FW20A4R70JA datasheet or visit the Bourns website for support.
Who is the manufacturer of FW20A4R70JA?
Bourns