Equivalent & Substitute Parts for BK/S500-100-R

Part Overview

The BK/S500-100-R is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm package manufactured by Eaton - Electronics Division. This component is classified as Active product status and requires a fuse holder for installation. Alternative equivalent and substitute parts are necessary to support supply chain flexibility, regional availability, and design optimization across multiple manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A (standard); 100A (OptiFuse FSC-100MA)
Mounting Type	Requires Holder
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S500-100-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 100 mA
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Glass
Response Time: Fast Blow
Package / Case: 5mm x 20mm
Mounting Type: Requires Holder

All substitute parts listed meet these mandatory parameters. Variations in secondary parameters such as Melting I²t, DC Cold Resistance, Breaking Capacity, and approval agencies do not disqualify substitution but indicate performance differences in specific application contexts. Parts are grouped by manufacturer to facilitate sourcing decisions.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (mA)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	RoHS Status	Inventory (Pcs)
BK/S500-100-R	Eaton - Electronics Division	S500	100	250	Fast Blow	5mm x 20mm	35	0.003	3.8	ROHS3 Compliant	1043
BK/GMA-100-R	Eaton - Electronics Division	GMA	100	250	Fast Blow	5mm x 20mm	35	0.0001	7.84	ROHS3 Compliant	1321
BK1/S500-100-R	Eaton - Electronics Division	S500	100	250	Fast Blow	5mm x 20mm	35	0.003	3.8	RoHS Compliant	1825
0034.1506	SCHURTER Inc.	FSF 5x20	100	250	Fast Blow	5mm x 20mm	35	0.0014	Not Specified	ROHS3 Compliant	888
0217.100HXP	Littelfuse Inc.	217	100	250	Fast Blow	5mm x 20mm	35	0.0045	5.6965	ROHS3 Compliant	3017
0217.100MXP	Littelfuse Inc.	217	100	250	Fast Blow	5mm x 20mm	35	0.0045	5.6965	ROHS3 Compliant	5500
0235.100HXP	Littelfuse Inc.	235	100	250	Fast Blow	5mm x 20mm	35	0.00312	8.4	ROHS3 Compliant	999
0235.100MXP	Littelfuse Inc.	235	100	250	Fast Blow	5mm x 20mm	35	0.00312	8.4	ROHS3 Compliant	1475
FSC-100MA	OptiFuse	FSC	100	250	Fast Blow	5mm x 20mm	100	Not Specified	Not Specified	ROHS3 Compliant	2381

Engineering Selection Recommendations

Eaton - Electronics Division (BK/GMA-100-R, BK1/S500-100-R): Both Eaton alternatives maintain full electrical and mechanical compatibility with the BK/S500-100-R. The BK1/S500-100-R is identical in the S500 series with equivalent Melting I²t and DC Cold Resistance. The BK/GMA-100-R offers CSA, PSE, and UL approval certifications, providing expanded regulatory coverage for applications requiring these specific agency approvals.

SCHURTER Inc. (0034.1506): The SCHURTER FSF 5x20 series part meets all mandatory substitution parameters with CCC, cURus, and VDE certifications. Operating temperature range of -55°C to 125°C supports extended environmental applications. This part is suitable for designs requiring SCHURTER-qualified components.

Littelfuse Inc. (0217.100HXP, 0217.100MXP, 0235.100HXP, 0235.100MXP): Littelfuse parts in both the 217 and 235 series provide comprehensive international certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. The 217 series (0217.100HXP and 0217.100MXP) are functionally equivalent with identical Melting I²t and DC Cold Resistance values. The 235 series (0235.100HXP and 0235.100MXP) offer slightly different thermal characteristics. All Littelfuse parts support -55°C to 125°C operating temperature range and are available in high inventory quantities.

OptiFuse (FSC-100MA): The OptiFuse FSC-100MA provides the highest breaking capacity at 100A, compared to 35A for other alternatives. This part carries cULus and UL 248 approvals with an operating temperature range of -55°C to 90°C. Selection of this part is appropriate for applications requiring enhanced breaking capacity performance.

Frequently Asked Questions (FAQ)

Q: Can BK/S500-100-R be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts meet the mandatory electrical and mechanical parameters: 100 mA current rating, 250 V AC voltage rating, fast-blow response, glass cartridge type, and 5mm x 20mm package size. Direct mechanical and electrical substitution is supported without circuit modification.

Q: What is the significance of different Melting I²t values among the substitute parts?

A: Melting I²t represents the thermal energy required to melt the fuse element. Variations in this parameter (ranging from 0.0001 to 0.0045 in the listed parts) indicate different thermal response characteristics. All parts maintain fast-blow classification, but applications with specific thermal sensitivity requirements should reference the Melting I²t value appropriate to the circuit design.

Q: Are there differences in approval certifications among the substitute parts?

A: Yes. The BK/S500-100-R carries no listed approval agencies. Eaton BK/GMA-100-R includes CSA, PSE, and UL certifications. SCHURTER 0034.1506 includes CCC, cURus, and VDE certifications. Littelfuse parts (0217 and 0235 series) include comprehensive certifications: CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. OptiFuse FSC-100MA includes cULus and UL 248 certifications. Selection should align with regional regulatory requirements.

Q: What is the difference between the Littelfuse 217 and 235 series?

A: Both series meet all mandatory substitution parameters. The 217 series (0217.100HXP and 0217.100MXP) have Melting I²t of 0.0045 and DC Cold Resistance of 5.6965 Ohms. The 235 series (0235.100HXP and 0235.100MXP) have Melting I²t of 0.00312 and DC Cold Resistance of 8.4 Ohms. These differences reflect different thermal and electrical characteristics within the fast-blow classification.

Q: Why does OptiFuse FSC-100MA have a higher breaking capacity (100A vs. 35A)?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The OptiFuse FSC-100MA is rated for 100A breaking capacity compared to 35A for other parts. This higher rating provides enhanced protection in circuits with higher available fault currents. Selection depends on the specific circuit fault current requirements.

Q: Does the 5mm x 20mm package size guarantee mechanical interchangeability?

A: Yes. All substitute parts share the identical 5mm x 20mm cartridge package size and require a fuse holder for installation. Mechanical interchangeability in standard fuse holders is confirmed across all listed parts.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, ensuring compliance with Restriction of Hazardous Substances regulations.

Q: What is the inventory availability for each substitute part?

A: Inventory quantities vary: BK1/S500-100-R (1825 Pcs), BK/GMA-100-R (1321 Pcs), 0217.100MXP (5500 Pcs), 0217.100HXP (3017 Pcs), FSC-100MA (2381 Pcs), 0235.100MXP (1475 Pcs), 0034.1506 (888 Pcs), and 0235.100HXP (999 Pcs). Littelfuse 0217.100MXP offers the highest inventory availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message