Equivalent & Substitute Parts for BK/S501-1.6-R Ceramic Fuse

Part Overview

The BK/S501-1.6-R is a 1.6 A, 250 V AC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This fast-blow fuse is designed for 5mm x 20mm holder applications and is currently in active production status with 713 units in stock. Substitute parts are identified when equivalent electrical parameters, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in circuit protection applications without design modification.

Substiute Parts

BK/S501-1.6-R

Eaton - Electronics DivisionIn Stock: 776BK/S501-1.6-R Datasheet

Current PartRFQ

GDA-1.6A

Eaton - Electronics DivisionIn Stock: 984GDA-1.6A Datasheet

Parametric EquivalentRFQ

021601.6HXP

Littelfuse Inc.In Stock: 1197021601.6HXP Datasheet

DirectRFQ

021601.6MXP

Littelfuse Inc.In Stock: 1876021601.6MXP Datasheet

DirectRFQ

5HF 1.6-R

Bel Fuse Inc.In Stock: 17975HF 1.6-R Datasheet

DirectRFQ

0001.1006

SCHURTER Inc.In Stock: 13040001.1006 Datasheet

Parametric EquivalentRFQ

FCD-1.6A

OptiFuseIn Stock: 2355FCD-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/S501-1.6-R are classified based on strict alignment with the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Current Rating: 1.6 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)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these criteria. Variations in secondary parameters such as melting I²t, DC cold resistance, and operating temperature range do not preclude substitution when primary electrical and mechanical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts satisfy the core electrical and mechanical requirements for direct replacement of the BK/S501-1.6-R. Selection among substitutes should be based on the following factors:

Compliance and Certification: The BK/S501-1.6-R carries approvals from CCC, cULus, MITI/JET, SEMKO, and VDE. Littelfuse parts (021601.6HXP and 021601.6MXP) provide the broadest certification coverage including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. Bel Fuse 5HF 1.6-R includes CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, and VDE. SCHURTER 0001.1006 includes CCC, cURus, KC, PSE/JET, and VDE. OptiFuse FCD-1.6A is certified to IEC 60127. Selection should prioritize parts with certifications matching the end-application regulatory requirements.

Product Status and Availability: All substitute parts are in active production status. Littelfuse 021601.6MXP offers the highest inventory level at 1799 units, followed by OptiFuse FCD-1.6A at 2280 units, providing supply continuity for high-volume applications.

Environmental Operating Range: The BK/S501-1.6-R does not specify an operating temperature range. Littelfuse, Bel Fuse, SCHURTER, and OptiFuse substitutes all specify -55°C ~ 125°C operating range, providing defined thermal performance for applications requiring temperature specification.

RoHS Compliance: The BK/S501-1.6-R is RoHS Compliant. Littelfuse, Bel Fuse, SCHURTER, and OptiFuse substitutes are ROHS3 Compliant, meeting current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the BK/S501-1.6-R?

A: Yes. All listed substitute parts meet the identical electrical specifications (1.6 A, 250 V AC, fast-blow response) and mechanical dimensions (5mm x 20mm cartridge). They are functionally equivalent for circuit protection applications using standard 5mm x 20mm fuse holders.

Q: What is the difference between the Littelfuse 021601.6HXP and 021601.6MXP models?

A: Both parts are electrically and mechanically identical with matching current rating, voltage, package, and breaking capacity. The designation difference (HXP vs. MXP) reflects internal construction or manufacturing process variations. Both are suitable substitutes with identical performance characteristics.

Q: Why do the substitute parts have different melting I²t values?

A: Melting I²t represents the thermal energy required to melt the fuse element and is a secondary characteristic that varies by manufacturer design. All parts maintain the same fast-blow response time and breaking capacity at rated voltage. Differences in melting I²t do not affect substitutability when primary electrical parameters are identical.

Q: Are there any dimensional differences between substitute parts?

A: The BK/S501-1.6-R specifies 0.205" diameter x 0.787" length (5.20mm x 20.00mm). The Bel Fuse 5HF 1.6-R specifies 0.201" diameter x 0.787" length (5.10mm x 20.00mm), representing a 0.1mm diameter variation. This minor difference does not affect holder compatibility, as standard 5mm x 20mm holders accommodate this tolerance range.

Q: Which substitute part should I select for applications requiring the broadest international certification?

A: Littelfuse 021601.6HXP and 021601.6MXP provide the most comprehensive certification coverage, including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. These certifications support deployment across North American, European, Asian, and international markets.

Q: Do all substitute parts meet RoHS requirements?

A: The BK/S501-1.6-R is RoHS Compliant. Littelfuse, Bel Fuse, SCHURTER, and OptiFuse substitutes are ROHS3 Compliant, meeting current environmental standards. GDA-1.6A does not specify RoHS status in the provided data.

Q: Can I mix different substitute parts in the same circuit or equipment?

A: Yes. All substitute parts are electrically and mechanically equivalent. Mixing different manufacturers' parts in the same application is permissible from a functional standpoint, as all meet identical electrical specifications and holder compatibility requirements.