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Littelfuse PSR031UL0400Z Semiconductor Fuse

Littelfuse PSR series high-speed square body semiconductor fuses provide reliable protection for power devices like IGBTs, SCRs, and MOSFETs in power conversion systems. Featuring ultra-fast response times with visual blown fuse indication and optional microswitches, these fuses are ideal for sensitive equipment such as inverters, UPS, and motor drives. Designed with ceramic bodies, plated copper contacts, and UL, IEC, and cURus certifications, they deliver high current limiting, superior cycling, and low watt-loss operation. Suitable for AC and DC applications up to 1300 V and 2000 A, with fast-acting protection to prevent damage from line surges and overcurrent conditions.

Authorized Distributors
Source:DigiKey
Part No:PSR031UL0400Z
Stock:0
Inv Date:05-28-2026
Price: Unit price: $316.71
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Part No:PSR031UL0400Z
Stock:0
Inv Date:05-29-2026
Price: Unit price: $313.67
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Part No:PSR031UL0400Z
Stock:0
Inv Date:05-28-2026
Price: Unit price: $563.65
Buy/RFQ:
Part No:PSR031UL0400Z
Stock:0
Inv Date:05-28-2026
Price: Unit price: $563.65
Buy/RFQ:
Part No:PSR031UL0400Z
Stock:0
Inv Date:05-28-2026
Price: Unit price: $245.06
Buy/RFQ:

Littelfuse PSR031UL0400Z Semiconductor Fuse Specifications:

  • Voltage Rating AC: 550 V-1300V
  • Voltage Rating DC: 480 V-1000 V
  • Amperage Rating: 40 A-2000 A
  • Interrupting Rating AC: 100 KA-200 kA
  • Interrupting Rating DC: 150 kA
  • Time Constant: 10 ms
  • Microswitch: Yes (optional)
  • Mounting: Bolted blade style
  • Body Material: Ceramic
  • Contacts: Plated copper
  • Certifications: UL 248-13 Recognized, cURus, IEC 60269-4 (Class aR), RoHS, REACH
  • Operating Temperature Range: -55°C to +125°C
  • Environmental Conditions: Up to +35°C with relative humidity <65%

Buy the Littelfuse Series PSR Semiconductor Fuse: PSR031UL0400Z

Secure your power systems with the Littelfuse PSR series high-speed semiconductor fuse, designed to protect sensitive devices like IGBTs and MOSFETs in inverter, UPS, and motor drive applications. These ceramic-bodied, UL and IEC certified fuses offer rapid response times, high current limiting, and visual blown fuse indication. Available in a wide range of ratings up to 2000 A and voltages up to 1300 V, they provide dependable overcurrent protection, helping prevent costly damage from line surges and faults. Purchase online now for reliable circuit safeguarding.

Order your Littelfuse Series PSR semiconductor fuse today and ensure your power devices are protected with reliable, ultra-fast circuit protection solutions.

Frequently Asked Questions

Where can I buy Littelfuse PSR031UL0400Z?

You can click on the BUY or RFQ button to purchase PSR031UL0400Z from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part PSR031UL0400Z?

You can download the PSR031UL0400Z datasheet or visit the Littelfuse website for support.

Who is the manufacturer of PSR031UL0400Z?

Littelfuse

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