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Bourns MFR185 Resettable PTC Thermistor

The MF-RX Series consists of resettable PTC thermistors designed for circuit protection in low voltage power supplies up to 60 V. These radial leaded devices feature plug-and-play installation with RoHS compliance and halogen-free materials, ensuring safety and environmental standards. Certified under UL and meet industry standards for resistance, trip cycle endurance, and temperature ratings, making them ideal for applications like security systems, fire alarms, loudspeakers, and power transformers. They provide reliable, resettable overcurrent protection, with packaging options including bulk, tape and reel, and Ammo-Pak.

Authorized Distributors
Source:Newark
Part No:MF-R185
Stock:4001
Inv Date:05-28-2026
Price: Unit price: $0.491
Buy/RFQ:
Source:DigiKey
Part No:MF-R185
Stock:11011
Inv Date:05-28-2026
Price: Unit price: $0.55
Buy/RFQ:
Part No:MF-R185
Stock:2286
Inv Date:05-29-2026
Price: Unit price: $0.46
Buy/RFQ:
Part No:MF-R185
Stock:17
Inv Date:05-28-2026
Price: Unit price: $0.66
Buy/RFQ:
Part No:MF-R185
Stock:8682
Inv Date:05-28-2026
Price: Unit price: $0.5817
Buy/RFQ:
Part No:MF-R185
Stock:8682
Inv Date:05-28-2026
Price: Unit price: $0.5817
Buy/RFQ:
Source:Arrow EU
Part No:MF-R185
Stock:28000
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:
Part No:MF-R185
Stock:25
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:

Bourns MFR185 Resettable PTC Thermistor Specifications:

  • Voltage Rating: 60 V
  • Hold Current: 1.10 - 3.75 Amps (model dependent)
  • Trip Current: 2.20 - 7.50 Amps (model dependent)
  • Resistance at 23°C: 0.05 - 0.38 Ohms
  • Maximum Device Surface Temperature in Tripped State: 125°C
  • Operating Temperature Range: -40°C to +85°C
  • Humidity Aging Resistance: +5 % resistance change over 1000 hours at 85 % RH
  • Thermal Shock Resistance: +10 % resistance change over 10 cycles
  • Vibration Resistance: No change according to MIL-STD-883C
  • UL File Number: 174545
  • RoHS compliant and halogen free according to industry standards
  • Bulk, tape and reel, and Ammo-Pak packaging options available
  • Designed for applications such as security/alarm systems, loudspeakers, and power transformers
  • Physical: Radial leaded, Sn/Cu material, lead diameter 0.81 mm (20 AWG)
  • Tolerance: ±0.3 mm

Buy the Bourns Series MF-RX Circuit Protection: MFR185

Enhance your circuit protection with the Bourns MF-RX185 resettable thermistor, designed for low voltage applications up to 60 V. Its RoHS compliance and halogen-free materials ensure safety and environmental friendliness. Certification under UL and industry standards guarantees durability and reliable performance. Available in bulk, tape and reel, or Ammo-Pak formats, this device offers fast installation and reusable overcurrent protection for alarms, speakers, and power supplies. Order online today to safeguard your electrical systems efficiently and sustainably.

Get Bourns MF-RX185 today—built for reliable circuit protection in low voltage power supplies and electronic systems.

Frequently Asked Questions

Where can I buy Bourns MFR185?

You can click on the BUY or RFQ button to purchase MFR185 from an authorized Bourns distributor.

How do I troubleshoot issues or seek technical support for part MFR185?

You can download the MFR185 datasheet or visit the Bourns website for support.

Who is the manufacturer of MFR185?

Bourns

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