Littelfuse 0468003.WR Surface Mount Fuse 3A 32V Equivalent & Substitute Parts

Part Overview

The Littelfuse 0468003.WR is an active-status surface mount board fuse rated for 3A at 32VAC/32VDC with slow-blow response characteristics. This SlimLine™ 468 series fuse is packaged in 1206 (3216 Metric) form factor and is designed for circuit protection in compact PCB applications. Substitute parts are identified based on identical electrical ratings, mechanical dimensions, and packaging specifications to ensure direct functional equivalence in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	3 A
Voltage Rating (AC)	32 V
Voltage Rating (DC)	32 V
Response Time	Slow Blow
Package / Case	1206 (3216 Metric)
Mounting Type	Surface Mount
Fuse Type	Board Mount (Cartridge Style Excluded)
Breaking Capacity @ Rated Voltage	50 A
Melting I²t	1.27
DC Cold Resistance	0.0195 Ohms
Operating Temperature Range	-55°C to 90°C
Size / Dimension	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)
Approval Agency	CSA, UL
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 0468003.WR are identified as parametric equivalents within the SlimLine™ 468 series. Substitution is valid when all critical electrical parameters match exactly: current rating (3A), AC voltage rating (32V), DC voltage rating (32V), response time (Slow Blow), breaking capacity (50A), and melting I²t value (1.27). Mechanical compatibility is confirmed through identical package designation (1206/3216 Metric), mounting type (Surface Mount), and physical dimensions. All substitute parts maintain the same approval certifications (CSA, UL), RoHS compliance status, and operating temperature range. Packaging format (Tape & Reel) is consistent across all variants.

Parameter Comparison

Parameter	0468003.WR	0468003.NR	0468003.NRHF
Manufacturer	Littelfuse	Littelfuse Inc.	Littelfuse Inc.
Series	SlimLine™ 468	SlimLine™ 468	SlimLine™ 468
Current Rating (Amps)	3 A	3 A	3 A
Voltage Rating - AC	32 V	32 V	32 V
Voltage Rating - DC	32 V	32 V	32 V
Response Time	Slow Blow	Slow Blow	Slow Blow
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)
Breaking Capacity @ Rated Voltage	50 A	50 A	50 A
Melting I²t	1.27	1.27	1.27
DC Cold Resistance	0.0195 Ohms	0.0195 Ohms	0.0195 Ohms
Operating Temperature	-55°C ~ 90°C	-55°C ~ 90°C	-55°C ~ 90°C
Size / Dimension	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)	0.125" L x 0.060" W x 0.023" H (3.18mm x 1.52mm x 0.58mm)
Approval Agency	CSA, UL	CSA, UL	CSA, UL
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—0468003.WR, 0468003.NR, and 0468003.NRHF—are active-status products with identical electrical and mechanical specifications. Selection among these equivalents may be based on inventory availability and supply chain considerations. All parts carry CSA and UL approvals and maintain ROHS3 compliance, confirming suitability for regulated applications. The 1206 surface mount package and slow-blow response characteristic are consistent across all variants, ensuring direct PCB assembly compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can 0468003.NR or 0468003.NRHF be used as direct replacements for 0468003.WR?

A: Yes. All three parts are parametric equivalents with identical current ratings (3A), voltage ratings (32VAC/32VDC), response time (Slow Blow), package designation (1206), and mechanical dimensions. They are functionally interchangeable in circuit protection applications.

Q: What determines substitution validity for this fuse series?

A: Substitution is valid when current rating, AC/DC voltage ratings, response time, breaking capacity, melting I²t value, package type, and physical dimensions are identical. All three parts meet these criteria.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts carry identical CSA and UL approvals, maintain ROHS3 compliance, and have the same moisture sensitivity level (MSL 1 - Unlimited).

Q: Does the packaging format affect substitution?

A: All three parts are supplied in Tape & Reel (TR) format. Packaging format is consistent and does not affect electrical or mechanical compatibility.

Q: What is the operating temperature range for these fuses?

A: The operating temperature range is -55°C to 90°C for all three equivalent parts.

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