Equivalent & Substitute Parts for S500-2-R Glass Cartridge Fuse

Part Overview

The S500-2-R is a 2 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 5mm x 20mm fuse holders and is ROHS3 compliant with active product status. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and regulatory approvals to ensure direct functional replacement in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Fast Blow
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35 A
Melting I²t	4.2
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the S500-2-R:

Category 1: Parametric Equivalents (Same Electrical Ratings & Dimensions) Parts that match all critical parameters: 2 A current rating, 250 V AC voltage rating, 5mm x 20mm package, fast-blow response, and 35 A breaking capacity. These parts are direct functional replacements with identical electrical performance characteristics.

Category 2: Parametric Equivalents (Enhanced Breaking Capacity) Parts that match all critical parameters except breaking capacity, which is rated at 100 A instead of 35 A. These parts provide equivalent circuit protection with higher fault current handling capability and are suitable for applications requiring enhanced short-circuit protection.

Category 3: Direct Manufacturer Equivalents (Different Melting I²t) Parts from alternative manufacturers that match all critical electrical and mechanical parameters but have different melting I²t values. These parts maintain identical voltage, current, and dimensional specifications while offering alternative thermal response characteristics.

The following key parameters determine substitution eligibility:

Current Rating: 2 A (mandatory match)
Voltage Rating: 250 V AC (mandatory match)
Package Dimensions: 5mm x 20mm (mandatory match)
Response Type: Fast Blow (mandatory match)
Fuse Type: Cartridge, Glass (mandatory match)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)
S500-2-R	Eaton - Electronics Division	2	250	5mm x 20mm	Fast Blow	35	4.2	0.043	912
BK/GDB-2A	Eaton - Electronics Division	2	250	5mm x 20mm	Fast Blow	35	4.2	0.043	2820
BK/S500-2-R	Eaton - Electronics Division	2	250	5mm x 20mm	Fast Blow	35	4.2	0.043	4260
BK1/S500-2-R	Eaton - Electronics Division	2	250	5mm x 20mm	Fast Blow	35	4.2	0.043	1480
GMA-2-R	Eaton - Electronics Division	2	250	5mm x 20mm	Fast Blow	100	3.1	0.066	1062
0217002.MXP	Littelfuse Inc.	2	250	5mm x 20mm	Fast Blow	35	5.73	0.0416	30200
0034.1519	SCHURTER Inc.	2	250	5mm x 20mm	Fast Blow	35	5.28	Not Provided	20622
0034.3877	SCHURTER Inc.	2	250	5mm x 20mm	Fast Blow	100	2.93	Not Provided	1840
0217002.HXP	Littelfuse Inc.	2	250	5mm x 20mm	Fast Blow	35	5.73	0.0416	3823
0217002.TXP	Littelfuse Inc.	2	250	5mm x 20mm	Fast Blow	35	5.73	0.0416	775
0235002.HXP	Littelfuse Inc.	2	250	5mm x 20mm	Fast Blow	100	2.645	0.0603	1478

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Performance)

BK/S500-2-R, BK/GDB-2A, and BK1/S500-2-R are direct parametric equivalents manufactured by Eaton - Electronics Division. These parts maintain identical current rating, voltage rating, breaking capacity, melting I²t, and dimensional specifications. All three parts are ROHS3 compliant and carry active product status. BK/S500-2-R offers the highest inventory availability (4260 pcs) among Eaton equivalents.

Littelfuse 0217002.MXP, 0217002.HXP, and 0217002.TXP are direct manufacturer equivalents from an alternative supplier. These parts match all critical electrical and mechanical parameters with identical 35 A breaking capacity. All three carry comprehensive regulatory approvals including BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. Operating temperature range is specified as -55°C to 125°C. Inventory availability is substantial (30200 pcs for 0217002.MXP).

SCHURTER 0034.1519 is a parametric equivalent with matching electrical ratings and 35 A breaking capacity. This part carries CCC, cURus, PSE/JET, and VDE approvals with operating temperature range of -55°C to 125°C. Inventory availability is 20622 pcs.

Enhanced Breaking Capacity Substitutes (100 A Breaking Capacity)

GMA-2-R (Eaton), 0034.3877 (SCHURTER), and 0235002.HXP (Littelfuse) are parametric equivalents with 100 A breaking capacity, providing enhanced short-circuit protection compared to the 35 A rating of S500-2-R. These parts maintain identical current, voltage, and dimensional specifications. Selection of these parts is appropriate for applications requiring higher fault current handling capability.

Regulatory Compliance Considerations

All substitute parts listed are ROHS3 compliant and carry active product status. Littelfuse parts include comprehensive international certifications (BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE). Eaton parts carry BSI, CCC, CSA, cURus, IMQ, SEMKO, and VDE approvals. SCHURTER parts carry CCC, cURus, PSE/JET, and VDE approvals. Selection should be based on specific regulatory requirements of the target application and geographic market.

Frequently Asked Questions (FAQ)

Q: Can BK/S500-2-R be used as a direct replacement for S500-2-R?

A: Yes. BK/S500-2-R is a parametric equivalent manufactured by Eaton - Electronics Division with identical current rating (2 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), breaking capacity (35 A), and melting I²t (4.2). Both parts are ROHS3 compliant and carry active product status.

Q: What is the difference between S500-2-R and GMA-2-R?

A: Both parts share identical current rating (2 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), and response type (fast blow). The primary difference is breaking capacity: S500-2-R is rated at 35 A, while GMA-2-R is rated at 100 A. GMA-2-R provides enhanced short-circuit protection and is suitable for applications requiring higher fault current handling.

Q: Are Littelfuse 0217002 series parts compatible with S500-2-R?

A: Yes. Littelfuse 0217002.MXP, 0217002.HXP, and 0217002.TXP are parametric equivalents with matching current rating (2 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), and breaking capacity (35 A). All three parts are ROHS3 compliant and carry comprehensive international regulatory approvals. Melting I²t differs (5.73 vs. 4.2), reflecting alternative thermal response characteristics from a different manufacturer.

Q: What does melting I²t indicate and why does it vary among substitutes?

A: Melting I²t is a thermal characteristic that indicates the fuse element's response to overcurrent conditions. Variations in melting I²t among substitute parts reflect differences in fuse element design and material composition between manufacturers. Parts with lower melting I²t values respond more quickly to overcurrent, while higher values indicate slower thermal response. Selection should be based on application-specific overcurrent protection requirements.

Q: Can SCHURTER 0034.3877 replace S500-2-R in all applications?

A: SCHURTER 0034.3877 is a parametric equivalent with matching current rating (2 A), voltage rating (250 V AC), and package dimensions (5mm x 20mm). However, it features 100 A breaking capacity compared to S500-2-R's 35 A rating, and lower melting I²t (2.93 vs. 4.2). This part is suitable for applications requiring enhanced short-circuit protection and faster thermal response. Regulatory approvals are limited to cULus certification.

Q: What is the significance of operating temperature range specifications?

A: Operating temperature range indicates the ambient temperature limits within which the fuse maintains specified electrical performance. Littelfuse and SCHURTER parts specify -55°C to 125°C (or -40°C to 85°C for 0034.3877), while Eaton parts do not provide explicit temperature specifications. Selection should consider the thermal environment of the target application.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant, matching the compliance status of S500-2-R. This ensures compatibility with regulatory requirements in markets requiring ROHS3 certification.

Q: Which substitute offers the highest inventory availability?

A: Littelfuse 0217002.MXP offers the highest inventory availability at 30200 pcs, followed by SCHURTER 0034.1519 at 20622 pcs. Eaton BK/S500-2-R provides 4260 pcs. Inventory levels should be considered for supply chain planning and lead time requirements.

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