Littelfuse 025101.6NRT1L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 025101.6NRT1L is a 1.6 A, 125 V AC/DC board mount fuse in axial package configuration. This fast-blow fuse is designed for through-hole mounting applications requiring circuit protection in the PICO® II 251 series. The part maintains active product status with full compliance to RoHS3, REACH, and international approval agencies including CSA and cURus. Substitute parts are identified when packaging format differs while maintaining identical electrical and mechanical specifications.

Substiute Parts

025101.6NRT1L

Littelfuse Inc.In Stock: 1154025101.6NRT1L Datasheet

Current PartRFQ

025101.6MAT1L

Littelfuse Inc.In Stock: 2081025101.6MAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 025101.6MAT1L is classified as a parametric equivalent based on identical electrical and mechanical specifications. The substitution is valid because both parts share the following critical parameters:

• Current Rating: 1.6 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Package / Case: Axial
• Breaking Capacity: 50 A AC, 300 A DC
• Physical Dimensions: 0.110" Dia x 0.280" L (2.80mm x 7.11mm)
• DC Cold Resistance: 0.07 Ohms
• Operating Temperature Range: -55°C ~ 125°C
• Series: PICO® II 251
• Compliance: RoHS3, REACH Unaffected, CSA/cURus Approved

The only difference between the main part and substitute is the packaging format: the main part (025101.6NRT1L) is supplied in Tape & Reel (TR) format, while the substitute (025101.6MAT1L) is supplied in Cut Tape (CT) format. Both formats contain identical components with no functional or performance variation.

Parameter Comparison

Engineering Selection Recommendations

Both the 025101.6NRT1L and 025101.6MAT1L are active products from Littelfuse Inc. with identical electrical performance and mechanical compatibility. Selection between these parts should be based on packaging requirements and supply chain considerations:

• 025101.6NRT1L (Tape & Reel): Suitable for high-volume automated assembly operations where continuous reel feeding is required.
• 025101.6MAT1L (Cut Tape): Suitable for lower-volume applications, manual assembly, or situations where individual component handling is preferred.

Both parts maintain full compliance with RoHS3 and REACH regulations. Approval by CSA and cURus certifications applies equally to both variants. The identical DC cold resistance (0.07 Ohms) and breaking capacity specifications ensure equivalent circuit protection performance in all rated applications.

Frequently Asked Questions (FAQ)

Q: Can 025101.6MAT1L be used as a direct replacement for 025101.6NRT1L?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Cut Tape vs. Tape & Reel). They are functionally interchangeable in all circuit applications.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on a continuous reel suitable for automated pick-and-place assembly. Cut Tape (CT) packaging supplies components on tape segments, typically used for manual assembly or lower-volume production.

Q: Do both parts have the same approval certifications?

A: Yes. Both 025101.6NRT1L and 025101.6MAT1L carry identical CSA and cURus approvals and are ROHS3 compliant.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.110" diameter by 0.280" length (2.80mm x 7.11mm) and are compatible with the same through-hole PCB footprints.

Q: What is the breaking capacity of these fuses?

A: Both parts have a breaking capacity of 50 A at rated AC voltage and 300 A at rated DC voltage.

Q: Can these fuses operate at temperatures outside the -55°C to 125°C range?

A: No. The operating temperature range is specified as -55°C to 125°C for both parts. Operation outside this range is not supported.