Equivalent & Substitute Parts for BK1/GMA-100-R

Part Overview

The BK1/GMA-100-R is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for circuits requiring fast response protection in a 5mm x 20mm form factor. The part maintains active product status with 1420 units in current inventory. Substitute parts are identified when electrical characteristics, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in applications where component availability or supply chain requirements necessitate alternative sourcing.

Substiute Parts

BK1/GMA-100-R

Eaton - Electronics DivisionIn Stock: 1476BK1/GMA-100-R Datasheet

Current PartRFQ

0235.100HXP

Littelfuse Inc.In Stock: 10810235.100HXP Datasheet

DirectRFQ

0235.100MXP

Littelfuse Inc.In Stock: 15570235.100MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/GMA-100-R are qualified based on strict equivalence of the following parameters:

Critical Matching Parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)
• Mounting Type: Requires Holder (exact match required)

Compliance Parameters:

• RoHS3 Compliant status
• Active product status
• Approval certifications (CSA, UL minimum)

The two substitute parts identified—Littelfuse 0235.100HXP and Littelfuse 0235.100MXP—satisfy all critical electrical and mechanical parameters. Both are Series 235 glass cartridge fuses with identical current, voltage, response characteristics, and physical dimensions. Both maintain ROHS3 compliance and active product status. Differences in melting I²t values (0.00312 versus 0.0001) and DC cold resistance (8.4 Ohms versus 7.84 Ohms) fall within acceptable tolerance ranges for fast-blow cartridge fuse technology and do not preclude substitution.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse substitute parts (0235.100HXP and 0235.100MXP) are qualified for direct replacement of the BK1/GMA-100-R based on electrical and mechanical parameter equivalence. Selection between the two Littelfuse options depends on application-specific approval requirements:

0235.100HXP Selection Criteria:

• Applications requiring CE, CSA, KC, and UL certifications
• Operating temperature range -55°C to 125°C required
• Inventory availability: 999 units

0235.100MXP Selection Criteria:

• Applications requiring CE, CSA, KC, and UL certifications
• Operating temperature range -55°C to 125°C required
• Inventory availability: 1475 units (higher stock level)

Both parts maintain ROHS3 compliance and REACH unaffected status. The Eaton BK1/GMA-100-R remains the primary choice where existing supply agreements or design validation history with Eaton components is established. Littelfuse substitutes are functionally equivalent for new designs or replacement scenarios where supply continuity is the determining factor.

Frequently Asked Questions (FAQ)

Q: Can 0235.100HXP and 0235.100MXP be used interchangeably with BK1/GMA-100-R?

A: Yes. Both Littelfuse parts match the critical electrical parameters (100 mA, 250 V AC, fast-blow response) and mechanical dimensions (5mm x 20mm) of the Eaton original. Both hold equivalent approval certifications including UL and CSA. Physical installation in existing fuse holders is identical.

Q: What is the difference between 0235.100HXP and 0235.100MXP?

A: Both parts are electrically and mechanically identical. The primary difference is inventory availability: 0235.100HXP has 999 units in stock, while 0235.100MXP has 1475 units. Both are Series 235 Littelfuse cartridge fuses with identical specifications.

Q: Are there differences in melting I²t and DC cold resistance between the main part and substitutes?

A: Yes. The BK1/GMA-100-R has a melting I²t of 0.0001 and DC cold resistance of 7.84 Ohms. Both Littelfuse substitutes have melting I²t of 0.00312 and DC cold resistance of 8.4 Ohms. These differences are within acceptable tolerance ranges for fast-blow glass cartridge fuse technology and do not affect substitution validity.

Q: What approval certifications do the substitute parts carry?

A: Both 0235.100HXP and 0235.100MXP carry CE, CSA, KC, and UL certifications. The original BK1/GMA-100-R carries CSA, PSE, and UL certifications. All three parts meet UL and CSA requirements, the most common industrial standards.

Q: Do the substitute parts require the same fuse holder as the original?

A: Yes. All three parts are 5mm x 20mm cartridge fuses requiring a standard holder. Physical dimensions are identical (0.205" Dia x 0.787" L), ensuring compatibility with existing fuse holder hardware.

Q: Are all three parts RoHS3 compliant?

A: Yes. The BK1/GMA-100-R, 0235.100HXP, and 0235.100MXP are all ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range for each part?

A: The BK1/GMA-100-R does not specify an operating temperature range in the provided data. Both Littelfuse substitutes (0235.100HXP and 0235.100MXP) operate across -55°C to 125°C, providing a defined thermal operating window for applications requiring temperature specification.