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Bourns MFR040 PTC Resettable Fuse

The MFR040 is a high-reliability PTC resettable fuse designed for low voltage power supply protection in various electronic applications including computers, automotive systems, and general electronics. Constructed with flame-retardant epoxy polymer meeting UL 94V-0 standards, it offers RoHS compliance and halogen-free features. The device provides consistent trip characteristics, with resistance and hold current ratings optimized for durability against thermal shock, humidity, and vibration over extended service life. Suitable for surface-mount or radial leaded configurations with bulk or tape packaging options, ensuring easy integration into electronic designs.

Authorized Distributors
Source:Newark
Part No:MF-R040
Stock:3298
Inv Date:05-28-2026
Price: Unit price: $0.425
Buy/RFQ:
Source:DigiKey
Part No:MF-R040
Stock:9674
Inv Date:05-28-2026
Price: Unit price: $0.47
Buy/RFQ:
Part No:MF-R040
Stock:11618
Inv Date:05-29-2026
Price: Unit price: $0.4
Buy/RFQ:
Part No:MF-R040
Stock:29
Inv Date:05-28-2026
Price: Unit price: $0.47
Buy/RFQ:
Part No:MF-R040
Stock:3007
Inv Date:05-28-2026
Price: Unit price: $0.281
Buy/RFQ:
Part No:MF-R040
Stock:3007
Inv Date:05-28-2026
Price: Unit price: $0.281
Buy/RFQ:
Source:Arrow EU
Part No:MF-R040
Stock:24000
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:
Part No:MF-R040
Stock:2
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:

Bourns MFR040 PTC Resettable Fuse Specifications:

  • Style: Radial Leaded
  • Material: Flame retardant epoxy polymer, UL 94V-0
  • RoHS compliant and halogen free
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Surface Temperature in Tripped State: 125°C
  • Resistance at 23°C: 0.62 Ω (typical)
  • Hold Current (Ihold): 0.78 A to 1.56 A (depending on model)
  • Trip Current: varies by model, typically around 1.4A to 2.8A
  • Response Time: seconds to trip at specified fault currents
  • Packaging Options: Bulk, Tape & Reel, Ammo-Pak available
  • Lead Diameter: 0.7 mm to 1.295 mm depending on model
  • Dimensions: typical length 12.0 mm, width varies by model, standard lead configurations
  • Vibration and Thermal Shock Resistance: MIL-STD-202, Method 215 & MIL-STD-883C, Method 2007.1
  • Environmental Resistance: Soil aging, humidity aging, solvent, vibration, thermal shock

Buy the Bourns Series MF-R PTC Resettable Fuse: MFR040

Enhance your electronic protection system with the Bourns MFR040 PTC resettable fuse, designed for high reliability and RoHS compliance. This fuse effectively prevents overcurrent damage and offers excellent environmental resistance, including thermal shock, humidity, and vibration endurance. Suitable for low voltage power supply protection, it is compatible with surface-mount and radial leaded configurations, with flexible packaging options for easy integration. Ensure your electronic projects and products operate safely and efficiently with this durable, eco-friendly protective device available for quick online purchase.

Buy Bourns MFR040 now and experience unmatched reliability and performance in overcurrent protection for your electronic devices.

Frequently Asked Questions

Where can I buy Bourns MFR040?

You can click on the BUY or RFQ button to purchase MFR040 from an authorized Bourns distributor.

How do I troubleshoot issues or seek technical support for part MFR040?

You can download the MFR040 datasheet or visit the Bourns website for support.

Who is the manufacturer of MFR040?

Bourns

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