Equivalent & Substitute Parts for 0453.080MR

Part Overview

The Littelfuse 0453.080MR is an 80 mA, 125 V AC/DC surface mount board mount fuse in the NANO²® 453 series. This component is designed for circuit protection in applications requiring fast-blow response characteristics with a 2-SMD, square end block package configuration. The part is currently active in production with full inventory availability. Alternative equivalent parts may be required due to supply chain considerations, design revisions, or specific manufacturing preferences while maintaining identical electrical and mechanical performance.

Substiute Parts

0453.080MR

Littelfuse Inc.In Stock: 11220453.080MR Datasheet

Current PartRFQ

0451.080MRL

Littelfuse Inc.In Stock: 28730451.080MRL Datasheet

Parametric EquivalentRFQ

SF-2410FP008T-2

Bourns Inc.In Stock: 3107SF-2410FP008T-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0453.080MR is determined by strict equivalence across the following critical parameters:

• Current Rating: 80 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package Configuration: 2-SMD, Square End Block (exact match required)
• Breaking Capacity: 50 A @ rated voltage (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)
• Regulatory Compliance: CSA and/or UL approval (minimum UL required)

Two substitute parts meet these criteria: the Littelfuse 0451.080MRL (parametric equivalent within the same manufacturer) and the Bourns SF-2410FP008T-2 (direct cross-manufacturer equivalent).

Parameter Comparison

Engineering Selection Recommendations

All three parts listed are active production components with full regulatory compliance. The 0451.080MRL represents a parametric equivalent within Littelfuse's product portfolio, offering identical electrical and mechanical specifications while belonging to the NANO²® 451 series. The SF-2410FP008T-2 from Bourns provides cross-manufacturer equivalence with identical core performance parameters and holds both cUL and UL certifications. Selection between these substitutes should be based on supply availability, procurement lead times, and established vendor relationships, as all three parts satisfy the identical functional and compliance requirements for this application.

Frequently Asked Questions (FAQ)

Q: Can the 0451.080MRL be used as a direct replacement for the 0453.080MR?

A: Yes. Both parts share identical electrical ratings (80 mA, 125 V AC/DC), response time (Fast Blow), package configuration (2-SMD, Square End Block), breaking capacity (50 A), operating temperature range (-55°C ~ 125°C), and regulatory approvals (CSA, UL). The primary difference is the series designation (NANO²® 451 versus NANO²® 453). Both are manufactured by Littelfuse and are ROHS3 compliant.

Q: Is the Bourns SF-2410FP008T-2 compatible with the 0453.080MR in existing designs?

A: Yes. The SF-2410FP008T-2 meets all critical electrical and mechanical parameters: 80 mA current rating, 125 V AC/DC voltage rating, Fast Blow response, 2-SMD Square End Block package, 50 A breaking capacity, and -55°C ~ 125°C operating temperature. Both parts hold UL certification. Minor dimensional variations exist (0.102" W x 0.102" H for Bourns versus 0.106" W x 0.106" H for Littelfuse), but these remain within standard PCB footprint tolerances for this package class.

Q: What are the key parameters that determine substitutability for this fuse?

A: Substitutability is determined by exact equivalence in current rating (80 mA), voltage ratings (125 V AC and DC), response time (Fast Blow), mounting type (Surface Mount), package configuration (2-SMD, Square End Block), breaking capacity (50 A), operating temperature range (-55°C ~ 125°C), and regulatory certification (UL minimum). Deviation in any of these parameters disqualifies a part as a direct substitute.

Q: Are there differences in DC cold resistance between these parts?

A: Yes. The 0453.080MR and 0451.080MRL both specify 4.05 Ohms DC cold resistance, while the SF-2410FP008T-2 specifies 4.974 Ohms. This difference does not affect substitutability, as DC cold resistance is not a limiting parameter for this application category and remains within acceptable operational ranges for board mount fuse performance.

Q: Do all three parts have identical melting I²t values?

A: No. The 0453.080MR and 0451.080MRL specify 0.00033 melting I²t, while the SF-2410FP008T-2 specifies 0.0017 melting I²t. Despite this difference, the SF-2410FP008T-2 remains a valid substitute because melting I²t is not a limiting parameter for this product category and both parts maintain identical current rating, voltage rating, and response time characteristics.

Q: What is the moisture sensitivity level for these fuses?

A: All three parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. Standard component storage practices apply.