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OptiFuse RASR420 Resettable Fuse

The RASR series resettable fuse is designed for overcurrent protection in battery packs and electronic devices operating up to 30V DC. This solid-state device features a low profile, axial mounting, and is constructed with nickel lead material with polyester tape insulation, ensuring durability and reliable operation across an ambient temperature range of -40°C to 85°C. It offers various rated currents from 1.2A to 4.2A, with maximum resistances and trip voltages tailored for efficient circuit protection. Suitable for rechargeable lithium batteries and protection modules, it complies with industry standards for safety and performance.

Authorized Distributors
Part No:RASR-420
Stock:0
Inv Date:06-05-2026
Price: Unit price: $0.609
Buy/RFQ:
Part No:RASR-420
Stock:0
Inv Date:06-05-2026
Price: Unit price: $0.609
Buy/RFQ:

OptiFuse RASR420 Resettable Fuse Specifications:

  • Rated Voltage: 30V DC
  • Operation Current: 1.2A to 4.2A
  • Maximum Voltage: 15V & 30V
  • Temperature Range: -40°C to 85°C
  • Physical Material: Nickel lead material, polyester tape insulation
  • Lead Thickness: 0.13mm nominal, quarter hard nickel
  • Soldering Standard: MIL-STD-202, method 208E
  • Physical Dimensions: Length 19.9-32.4 mm depending on model, width 4.9-13.6 mm, height 0.5-1.1 mm
  • Rated Resistance: As per model (e.g., 0.085-0.012 Ohms)
  • Trip Current Range: 1.20A to 7.60A
  • Hold Current: Up to 4.20A, depending on model
  • Product Type: Resettable PPTC fuse for overcurrent protection
  • Application: Battery packs, rechargeable lithium batteries, electronic protection circuits

Buy the Optifuse Series RASR Resettable Fuse: RASR420

Purchase the Optifuse RASR420 resettable fuse today for dependable overcurrent protection in battery packs and electronic circuits. Featuring axial mounting, low profile design, and rated for 30V DC, it ensures safety, durability, and efficient circuit management. Ideal for rechargeable lithium batteries and protection modules, this fuse offers reliable performance with rated currents up to 4.2A, making it suitable for various high-current applications. Order online now to secure top-quality overcurrent protection for your electronic devices and battery systems.

Get Optifuse RASR420 today—built for battery protection and circuit safety with reliable resettable overcurrent protection.

Frequently Asked Questions

Where can I buy OptiFuse RASR420?

You can click on the BUY or RFQ button to purchase RASR420 from an authorized OptiFuse distributor.

How do I troubleshoot issues or seek technical support for part RASR420?

You can download the RASR420 datasheet or visit the OptiFuse website for support.

Who is the manufacturer of RASR420?

OptiFuse

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