Equivalent & Substitute Parts for BK/GMA-800MA

Part Overview

The BK/GMA-800MA is an 800 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm package manufactured by Eaton - Electronics Division. This part is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for ongoing system maintenance and new designs. Substitute parts maintain identical electrical and mechanical specifications while offering improved compliance and availability from active manufacturing sources.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GMA-800MA is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

Current Rating: 800 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity @ Rated Voltage: 35A (exact match required)

All substitute parts listed maintain these exact specifications. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not affect functional substitutability within the defined electrical and mechanical envelope.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (mA)	Voltage (V AC)	Package	Response Time	Breaking Capacity (A)	Product Status	RoHS Status
BK/GMA-800MA	Eaton	GMA	800	250	5x20mm	Fast Blow	35	Obsolete	Non-compliant
BK/GMA-800-R	Eaton	GMA	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant
BK/GDB-800MA	Eaton	GDB	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant
BK/S500-800-R	Eaton	S500	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant
BK1/GMA-800-R	Eaton	GMA	800	250	5x20mm	Fast Blow	35	Active	RoHS Compliant
BK1/S500-800-R	Eaton	S500	800	250	5x20mm	Fast Blow	35	Active	RoHS Compliant
GDB-800MA	Eaton	GDB	800	250	5x20mm	Fast Blow	35	Active	Not specified
GMA-800-R	Eaton	GMA	800	250	5x20mm	Fast Blow	35	Active	RoHS Compliant
S500-800-R	Eaton	S500	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant
0235.800MXP	Littelfuse	235	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant
0235.800VXP	Littelfuse	235	800	250	5x20mm	Fast Blow	35	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Eaton Active Equivalents:

BK/GMA-800-R, BK/GDB-800MA, and BK/S500-800-R are direct Eaton replacements with active product status. These parts are manufactured by the original equipment supplier and maintain full electrical and mechanical compatibility. BK/GMA-800-R and BK/S500-800-R carry ROHS3 compliance certification. BK/GDB-800MA carries VDE and UR approvals. Selection among these three depends on required approval agency certifications for the target application.

Secondary Recommendation - Eaton Variants:

BK1/GMA-800-R and BK1/S500-800-R are Eaton variants with active status and RoHS compliance. GMA-800-R and S500-800-R are additional Eaton options with active status. These parts maintain identical electrical specifications and are suitable for applications where the specific Eaton variant designation is not constrained.

Alternative Manufacturer - Littelfuse:

0235.800MXP and 0235.800VXP are Littelfuse equivalents with active product status and ROHS3 compliance. These parts are suitable for applications where multi-source qualification is required. Both parts carry CE, CSA, and UL certifications. Operating temperature range is specified as -55°C to 125°C.

Compliance Considerations:

The original BK/GMA-800MA is RoHS non-compliant. All recommended substitutes carry either RoHS or ROHS3 compliance certification, meeting current regulatory requirements for new designs and system updates.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-800MA be directly replaced with BK/GMA-800-R?

A: Yes. BK/GMA-800-R is an active-status equivalent from Eaton with identical electrical and mechanical specifications. The primary difference is product status (active vs. obsolete) and improved RoHS compliance.

Q: What is the difference between Eaton GMA, GDB, and S500 series fuses?

A: All three series maintain identical electrical specifications for the 800 mA, 250 V rating. Differences exist in approval agency certifications and secondary parameters such as melting I²t and DC cold resistance. Series selection depends on required certifications for the target application.

Q: Are Littelfuse 0235.800MXP and 0235.800VXP compatible with Eaton fuse holders?

A: Yes. Both Littelfuse parts maintain the identical 5mm x 20mm package specification and are designed for standard cartridge fuse holders. Mechanical and electrical compatibility is maintained.

Q: What is the significance of melting I²t variation among substitute parts?

A: Melting I²t is a secondary thermal characteristic. All listed parts maintain the same current rating (800 mA), voltage rating (250 V), and breaking capacity (35A). Variations in melting I²t do not affect substitutability within the defined electrical envelope.

Q: Which substitute part offers the widest operating temperature range?

A: Littelfuse 0235.800MXP and 0235.800VXP specify an operating temperature range of -55°C to 125°C. Eaton parts do not specify operating temperature limits in the provided data.

Q: Can I use BK1/GMA-800-R as a substitute for BK/GMA-800MA in legacy systems?

A: Yes. BK1/GMA-800-R maintains identical electrical and mechanical specifications. The "1" designation indicates a variant within the GMA series. Functional compatibility is maintained.

Q: What approval agencies are common across all substitute options?

A: CSA and UL certifications are present across multiple substitute options. Specific approval agency requirements should be verified against system design specifications.

Q: Is there a performance difference between fast-blow fuses from different manufacturers?

A: All listed parts are specified as fast-blow response type with identical 35A breaking capacity. Performance differences are limited to secondary parameters such as DC cold resistance and melting I²t, which do not affect primary protective function within the rated specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message