Littelfuse 0494.375NR Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0494.375NR is an active surface mount board mount fuse rated at 375 mA with 32 V AC/DC voltage rating in 0603 (1608 Metric) package. This fast blow fuse is designed for circuit protection in compact electronic assemblies requiring board-level mounting without cartridge-style housings. Equivalent and substitute parts are available within the Littelfuse 494 and 467 series to support design flexibility, inventory optimization, and supply chain continuity.

Substiute Parts

0494.375NR

Littelfuse Inc.In Stock: 501610494.375NR Datasheet

Current PartRFQ

0467.375NR

Littelfuse Inc.In Stock: 104420467.375NR Datasheet

Parametric EquivalentRFQ

0467.375NRHF

Littelfuse Inc.In Stock: 8029930467.375NRHF Datasheet

Parametric EquivalentRFQ

0494.375NRHF

Littelfuse Inc.In Stock: 402430494.375NRHF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0494.375NR is determined by strict equivalence across the following critical parameters:

• Current Rating: 375 mA (exact match required)
• Voltage Rating: 32 V AC and 32 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)
• Operating Temperature Range: -55°C to 90°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All substitute parts listed meet these criteria. Differences in melting I²t values and DC cold resistance do not disqualify substitution when all primary electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

All four parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. Selection between 0494.375NR and its substitutes should be based on approval agency requirements and inventory availability:

• 0494.375NR and 0494.375NRHF carry CSA and UR approvals
• 0467.375NR and 0467.375NRHF carry CSA and UL approvals

Choose based on your circuit protection certification requirements. All parts are electrically and mechanically interchangeable within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can I substitute 0467.375NR for 0494.375NR? A: Yes. Both parts meet identical electrical specifications (375 mA, 32 V AC/DC, fast blow, 50 A breaking capacity) and mechanical requirements (0603 package, surface mount, board mount type). The difference in approval agencies (UR vs. UL) does not affect electrical substitution; verify your application's certification requirements.

Q: What is the difference between standard and HF variants? A: The HF designation indicates a halogen-free formulation. Electrically and mechanically, 0494.375NR and 0494.375NRHF are identical. Select the HF variant if your application requires halogen-free components.

Q: Are all substitute parts available in the same packaging? A: Yes. All four parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly.

Q: Do the differences in melting I²t values affect substitution? A: No. The 0494 series (I²t = 0.0053) and 0467 series (I²t = 0.0035) both meet the 375 mA, 32 V fast blow specification. Melting I²t differences do not disqualify substitution when all primary electrical and mechanical parameters are identical.

Q: Can I use these fuses in both AC and DC circuits? A: Yes. All parts are rated for 32 V AC and 32 V DC operation across the -55°C to 90°C operating temperature range.