Littelfuse 0253.375M Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0253.375M is a 375 mA, 125 V AC/DC board mount fuse featuring fast blow response characteristics and axial through-hole mounting. This PICO® II 253 series component is designed for circuit protection in applications requiring reliable overcurrent interruption at low current levels. The part maintains active product status with full compliance to RoHS3 and REACH regulations. Identifying equivalent and substitute parts becomes necessary when managing inventory across multiple procurement channels, accommodating supply chain variations, or standardizing component selections across product lines while maintaining identical electrical and mechanical performance.

Substiute Parts

0253.375M

Littelfuse Inc.In Stock: 8100253.375M Datasheet

Current PartRFQ

0253.375V

LittelfuseIn Stock: 14070253.375V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0253.375M is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part 0253.375V qualifies as a direct parametric equivalent based on identical specifications in the following key criteria:

Current Rating: Both parts are rated at 375 mA, ensuring identical overcurrent protection thresholds.

Voltage Ratings: Both maintain 125 V AC and 125 V DC ratings, confirming compatibility with identical circuit voltage environments.

Response Characteristics: Both employ fast blow response with matching Melting I²t values of 0.0296, ensuring identical thermal response behavior.

Mechanical Compatibility: Both feature axial through-hole mounting with identical physical dimensions (0.103" Dia x 0.280" L), enabling direct board-level substitution without layout modifications.

Electrical Performance: Both maintain identical DC cold resistance of 0.395 Ohms and breaking capacity specifications (50A AC, 300A DC).

Regulatory Compliance: Both parts carry identical approval certifications (CSA, QPL, UR) and maintain ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0253.375M and 0253.375V maintain active product status with full regulatory compliance. Selection between these parts should be based on procurement availability and inventory management requirements, as both components deliver identical electrical performance and mechanical compatibility. The 0253.375V currently maintains higher inventory availability (1393 Pcs vs. 760 Pcs), which may influence supply chain decisions. Both parts satisfy CSA, QPL, and UR approval requirements and maintain full RoHS3 and REACH compliance, ensuring regulatory acceptability across all target markets. No performance differentiation exists between these components.

Frequently Asked Questions (FAQ)

Q: Can the 0253.375V directly replace the 0253.375M in existing designs?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (375 mA, 125 V AC/DC), matching response characteristics (fast blow, 0.0296 Melting I²t), and identical physical dimensions (0.103" Dia x 0.280" L). Direct substitution requires no circuit modifications or board layout changes.

Q: Are there any differences in approval certifications between these parts?

A: No. Both parts carry identical certifications from CSA, QPL, and UR, and both maintain ROHS3 compliance and REACH unaffected status.

Q: What determines whether a fuse can substitute for the 0253.375M?

A: Substitution eligibility requires exact matching across current rating (375 mA), voltage ratings (125 V AC and DC), response time (fast blow), melting I²t value (0.0296), physical dimensions, mounting type (through hole axial), and regulatory certifications. Any deviation in these parameters disqualifies a part from direct substitution.

Q: Do these parts have identical thermal and electrical performance?

A: Yes. Both parts maintain identical DC cold resistance (0.395 Ohms), breaking capacity (50A AC, 300A DC), operating temperature range (-55°C ~ 125°C), and melting I²t characteristics, ensuring identical circuit protection behavior.

Q: Can these parts be used interchangeably in high-reliability applications?

A: Yes. Both parts maintain active product status and carry identical regulatory approvals, making them suitable for applications requiring CSA, QPL, or UR certification.