Equivalent & Substitute Parts for BK/S500-80-R

Part Overview

The BK/S500-80-R is an 80 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm package format. This component is designed for circuit protection applications requiring a holder-mounted fuse element. The part is currently active in production with 818 pieces in stock inventory. Alternative equivalent and substitute parts are available from multiple manufacturers to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Current Rating	80 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35 A
Mounting Type	Requires Holder
Melting I²t	0.0012
DC Cold Resistance	5 Ohms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S500-80-R is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

Current Rating: 80 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)

All substitute parts listed meet these critical parameters. Substitute parts are grouped into two categories:

Parametric Equivalents (Eaton - Electronics Division):

BK/GDB-80MA (GDB series)
GDB-80MA (GDB series, without BK prefix)
S500-80-R (S500 series, alternative designation)

Direct Manufacturer Substitutes (Alternative Manufacturers):

0034.1531 (SCHURTER Inc., FSF 5x20 series)
0217.080MXP (Littelfuse Inc., 217 series)

Parameter Comparison

Parameter	BK/S500-80-R	BK/GDB-80MA	GDB-80MA	S500-80-R	0034.1531	0217.080MXP
Manufacturer	Eaton	Eaton	Eaton	Eaton	SCHURTER	Littelfuse
Current Rating (Amps)	80 mA	80 mA	80 mA	80 mA	80 mA	80 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Breaking Capacity @ Rated Voltage	35 A	35 A	35 A	35 A	35 A	35 A
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Melting I²t	0.0012	0.0012	0.0012	0.0012	0.00102	0.00083
DC Cold Resistance (Ohms)	5	5	5	5	Not Specified	7.89
RoHS Status	ROHS3 Compliant	RoHS Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active
Inventory (Pcs)	818	1030	963	649	1715	1279

Engineering Selection Recommendations

Eaton Parametric Equivalents (BK/GDB-80MA, GDB-80MA, S500-80-R):

These parts are direct parametric equivalents manufactured by Eaton - Electronics Division. All three maintain identical electrical and mechanical specifications to the BK/S500-80-R. Selection among these Eaton variants is based on series designation and internal part numbering conventions. BK/GDB-80MA and GDB-80MA represent the GDB series, while S500-80-R represents the S500 series. All are ROHS3 compliant and active in production. Inventory availability ranges from 649 to 1030 pieces.

SCHURTER 0034.1531 (FSF 5x20 Series):

This part meets all critical electrical and mechanical parameters. The SCHURTER FSF 5x20 series fuse carries multiple approval agencies including CCC, cURus, and VDE. Operating temperature range is specified as -55°C to 125°C. This part is suitable for applications requiring extended temperature performance and international certifications. Inventory availability is 1715 pieces.

Littelfuse 0217.080MXP (217 Series):

This part meets all critical electrical and mechanical parameters. The Littelfuse 217 series fuse carries the broadest approval agency coverage, including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Operating temperature range is specified as -55°C to 125°C. DC cold resistance is 7.89 Ohms, which differs from the 5 Ohm specification of the primary part. Melting I²t is 0.00083, which is lower than the primary part specification of 0.0012. Inventory availability is 1279 pieces.

Selection should prioritize parts with matching DC cold resistance and melting I²t values when circuit protection characteristics are critical to application performance.

Frequently Asked Questions (FAQ)

Q: Can BK/GDB-80MA be used as a direct replacement for BK/S500-80-R?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (80 mA, 250 V AC), fuse type (cartridge, glass), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (35 A). The difference is series designation only (GDB versus S500).

Q: What is the difference between BK/GDB-80MA and GDB-80MA?

A: Both parts are from the Eaton GDB series with identical electrical and mechanical specifications. The "BK/" prefix in BK/GDB-80MA is a manufacturer designation variant. Both are functionally equivalent for circuit protection applications.

Q: Can I substitute a Littelfuse 0217.080MXP for the BK/S500-80-R?

A: The Littelfuse 0217.080MXP meets all critical parameters: 80 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package, and 35 A breaking capacity. However, the DC cold resistance is 7.89 Ohms compared to 5 Ohms for the primary part, and the melting I²t is 0.00083 compared to 0.0012. These differences may affect circuit protection timing characteristics. Substitution is permissible only if the application tolerates these parameter variations.

Q: Can I substitute a SCHURTER 0034.1531 for the BK/S500-80-R?

A: Yes. The SCHURTER 0034.1531 meets all critical electrical and mechanical parameters. The melting I²t is 0.00102, which is closer to the primary part specification of 0.0012 than the Littelfuse alternative. DC cold resistance is not specified for this part. The SCHURTER part carries CCC, cURus, and VDE certifications and operates across -55°C to 125°C.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant or RoHS compliant. The primary part BK/S500-80-R is ROHS3 compliant. Eaton parametric equivalents carry either ROHS3 or RoHS compliance. SCHURTER 0034.1531 and Littelfuse 0217.080MXP are both ROHS3 compliant.

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

A: Eaton parts do not specify approval agencies. SCHURTER 0034.1531 carries CCC, cURus, and VDE approvals. Littelfuse 0217.080MXP carries the broadest coverage: CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Selection based on required certifications for target markets should prioritize the Littelfuse option for maximum geographic and standards compliance.

Q: Which substitute part has the highest inventory availability?

A: SCHURTER 0034.1531 has the highest inventory with 1715 pieces in stock, followed by Littelfuse 0217.080MXP with 1279 pieces. Among Eaton parametric equivalents, BK/GDB-80MA has 1030 pieces available.

Q: Do all parts require a fuse holder for installation?

A: Yes. All parts listed, including the primary BK/S500-80-R and all substitutes, are cartridge-type fuses that require a holder for mounting. The 5mm x 20mm package dimension is standardized across all parts, ensuring mechanical compatibility with standard fuse holders designed for this format.

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