Equivalent & Substitute Parts for S500-1-R Glass Fuse Cartridge

Part Overview

The S500-1-R is a 1 A, 250 V AC/DC fast-blow glass fuse cartridge manufactured by Eaton - Electronics Division. This component is designed for use in 5mm x 20mm fuse holders and is classified as Active product status. The S500-1-R requires a compatible fuse holder for installation and is ROHS3 compliant. Equivalent and substitute parts are identified when identical electrical and mechanical parameters are maintained across different manufacturer series or alternative suppliers, ensuring direct functional interchangeability within the specified application constraints.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35 A
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the S500-1-R is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Current Rating: 1 A (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)

Secondary Compatibility Parameters:

Mounting Type: Requires Holder (all substitutes maintain this requirement)
RoHS Status: ROHS3 Compliant (all substitutes maintain this compliance level)

Substitute parts are grouped into two categories: Eaton - Electronics Division series variants (BK/GDB-1A, BK/S500-1-R, BK1/S500-1-R, GMA-1-R) and cross-manufacturer equivalents (Littelfuse Inc. 217 series, SCHURTER Inc. FSF and FSK series). All listed substitutes maintain identical electrical performance characteristics and mechanical form factors, enabling direct replacement within existing fuse holder assemblies.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Inventory (Pcs)
S500-1-R	Eaton - Electronics Division	S500	1	250	Fast Blow	5x20mm	35	0.6	0.125	671
BK/GDB-1A	Eaton - Electronics Division	GDB	1	250	Fast Blow	5x20mm	35	0.6	0.125	916
BK/S500-1-R	Eaton - Electronics Division	S500	1	250	Fast Blow	5x20mm	35	0.6	0.125	2112
BK1/S500-1-R	Eaton - Electronics Division	S500	1	250	Fast Blow	5x20mm	35	0.6	0.125	887
GMA-1-R	Eaton - Electronics Division	GMA	1	250	Fast Blow	5x20mm	35	0.48	0.163	998
0217001.MXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	2300
0034.1516	SCHURTER Inc.	FSF 5x20	1	250	Fast Blow	5x20mm	35	1.13	—	3114
0034.3872	SCHURTER Inc.	FSK 5x20	1	250	Fast Blow	5x20mm	35	0.68	—	1703
0217001.HXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	1800
0217001.MXBP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	1862
0217001.TXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	4204

Engineering Selection Recommendations

Eaton - Electronics Division Variants (BK/GDB-1A, BK/S500-1-R, BK1/S500-1-R, GMA-1-R):

These parts maintain Active product status and are manufactured by the same supplier as the primary S500-1-R component. BK/S500-1-R and BK1/S500-1-R are direct series variants with identical electrical characteristics (Melting I²t: 0.6, DC Cold Resistance: 0.125 Ω). BK/GDB-1A offers equivalent performance within the GDB series. GMA-1-R exhibits slightly different thermal characteristics (Melting I²t: 0.48, DC Cold Resistance: 0.163 Ω) but maintains all primary equivalence criteria. Approval agencies vary across these variants; selection should align with specific certification requirements for the target application.

Littelfuse Inc. 217 Series (0217001.MXP, 0217001.HXP, 0217001.MXBP, 0217001.TXP):

All Littelfuse 217 series variants are parametrically equivalent with identical Melting I²t (1.045) and DC Cold Resistance (0.0964 Ω). These parts carry comprehensive international approvals (BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE) and operate across -55°C to 125°C temperature range. The 0217001.TXP variant offers the highest inventory availability (4204 Pcs).

SCHURTER Inc. FSF and FSK Series (0034.1516, 0034.3872):

SCHURTER FSF 5x20 (0034.1516) provides Melting I²t of 1.13 with broad certification coverage (CCC, cURus, PSE/JET, VDE) and -55°C to 125°C operating range. SCHURTER FSK 5x20 (0034.3872) offers Melting I²t of 0.68 with cULus certification and -40°C to 85°C operating range. Selection between these variants depends on specific thermal and certification requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/S500-1-R be used as a direct replacement for S500-1-R?

A: Yes. BK/S500-1-R is a parametric equivalent within the same S500 series manufactured by Eaton - Electronics Division. It maintains identical current rating (1 A), voltage rating (250 V AC), response time (Fast Blow), package dimensions (5mm x 20mm), breaking capacity (35 A), and thermal characteristics (Melting I²t: 0.6, DC Cold Resistance: 0.125 Ω). Direct substitution is supported.

Q: What is the difference between Eaton GMA-1-R and S500-1-R?

A: Both parts meet all primary equivalence criteria (1 A, 250 V AC, Fast Blow, 5x20mm, 35 A breaking capacity). The GMA-1-R exhibits different thermal characteristics: Melting I²t of 0.48 versus 0.6 for S500-1-R, and DC Cold Resistance of 0.163 Ω versus 0.125 Ω. Approval agencies also differ (GMA-1-R: CSA, PSE, UL; S500-1-R: BSI, CCC, CSA, cURus, IMQ, SEMKO, VDE). Selection should be based on specific application thermal requirements and required certifications.

Q: Are Littelfuse 217 series fuses compatible with existing S500-1-R fuse holders?

A: Yes. All Littelfuse 217 series variants (0217001.MXP, 0217001.HXP, 0217001.MXBP, 0217001.TXP) maintain the 5mm x 20mm package dimension and are mechanically compatible with standard 5x20mm fuse holders. Electrical parameters are equivalent: 1 A current rating, 250 V AC voltage rating, Fast Blow response, and 35 A breaking capacity. These parts are suitable for direct replacement.

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

A: Melting I²t represents the thermal energy required to melt the fuse element and is a measure of fuse thermal response. S500-1-R specifies 0.6, while Littelfuse 217 series specifies 1.045 and SCHURTER FSF specifies 1.13. All values remain within the Fast Blow classification for 1 A fuses. Application-specific thermal requirements and circuit protection characteristics should determine selection. Consult application documentation for thermal performance specifications.

Q: Which substitute part offers the highest inventory availability?

A: Littelfuse 0217001.TXP provides the highest inventory level at 4204 Pcs. SCHURTER 0034.1516 (FSF 5x20) offers 3114 Pcs. Eaton BK/S500-1-R provides 2112 Pcs. Inventory levels support supply chain planning and lead-time considerations.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the primary S500-1-R component. This ensures environmental and regulatory consistency across equivalent part selections.

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

A: VDE certification is present across all substitute parts. Additional common certifications include CCC and CSA. Specific application requirements may necessitate parts with particular approval agency certifications (UL, cULus, PSE, etc.). Consult application specifications for required certification coverage.

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