Littelfuse 02161.25VXP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 02161.25VXP is a 1.25 A, 250 V AC ceramic cartridge fuse in 5mm x 20mm form factor, designed for fast-blow protection in AC/DC circuits. This active product requires a compatible fuse holder for installation. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance characteristics to ensure direct functional replacement in circuit protection applications.

Substiute Parts

02161.25VXP

Littelfuse Inc.In Stock: 83502161.25VXP Datasheet

Current PartRFQ

02161.25HXP

Littelfuse Inc.In Stock: 854402161.25HXP Datasheet

Parametric EquivalentRFQ

02161.25MXP

Littelfuse Inc.In Stock: 199002161.25MXP Datasheet

Parametric EquivalentRFQ

0001.1005

SCHURTER Inc.In Stock: 19240001.1005 Datasheet

DirectRFQ

FCD-1.25A

OptiFuseIn Stock: 3360FCD-1.25A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Engineering Selection Recommendations

All five part numbers listed are active products with ROHS3 compliance and are electrically and mechanically equivalent for direct substitution in 1.25 A, 250 V AC ceramic cartridge fuse applications.

Littelfuse 02161.25VXP, 02161.25HXP, and 02161.25MXP are variants within the same manufacturer series (216) and carry identical electrical specifications and approval certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE).

SCHURTER 0001.1005 (SP 5x20 series) and OptiFuse FCD-1.25A provide cross-manufacturer alternatives with equivalent performance. SCHURTER carries certifications from CCC, cURus, KC, and VDE. OptiFuse FCD-1.25A is certified to IEC 60127 and explicitly specifies 250 V DC rating in addition to AC rating.

Selection between these parts may be based on inventory availability, lead time, or existing supply chain relationships, as all meet the specified electrical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q: Can 02161.25HXP and 02161.25MXP be used interchangeably with 02161.25VXP?

A: Yes. All three Littelfuse part numbers share identical electrical ratings (1.25 A, 250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response time (fast blow), and operating temperature range (-55°C to 125°C). They are direct functional equivalents.

Q: What is the difference between the Littelfuse variants and the SCHURTER 0001.1005?

A: The SCHURTER 0001.1005 is from a different manufacturer (SCHURTER Inc., SP 5x20 series) but meets all electrical and mechanical specifications. The melting I²t value is slightly higher (0.538 vs. 0.48), and the certification set differs (CCC, cURus, KC, VDE vs. CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). Electrical performance and physical form factor are equivalent.

Q: Does OptiFuse FCD-1.25A have any advantages over the Littelfuse options?

A: OptiFuse FCD-1.25A explicitly specifies a 250 V DC rating in addition to 250 V AC, whereas the Littelfuse variants do not specify DC voltage. The melting I²t is 0.4489, which is lower than the Littelfuse value of 0.48. Both are certified to IEC 60127 and ROHS3 compliant. Selection depends on whether DC voltage rating documentation is required for your application.

Q: Are all substitute parts available in the same packaging?

A: Yes. All five part numbers are supplied in bulk packaging and use the identical 5mm x 20mm cartridge form factor, requiring the same fuse holder for installation.

Q: What certifications apply to all substitute parts?

A: All five parts are ROHS3 compliant and REACH unaffected. Littelfuse variants carry UL, VDE, CE, CSA, CCC, KC, PSE, and SEMKO certifications. SCHURTER 0001.1005 carries CCC, cURus, KC, and VDE certifications. OptiFuse FCD-1.25A is certified to IEC 60127. Verify that the specific certifications required by your application are present in the selected part number.