SCHURTER 2010.0017 Glass Cartridge Fuse 1A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The SCHURTER 2010.0017 is a 1A 250VAC glass cartridge fuse in the FSU 5x20 series, designed for circuit protection in applications requiring slow-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters. Substitute parts must match the core ratings: 1A current, 250V AC voltage, 5x20mm form factor, slow-blow response, and cartridge glass construction with holder mounting.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following mandatory parameters:

Current Rating: 1A (exact match required)
Voltage Rating: 250V AC (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed meet these core requirements. Variations in melting I²t, breaking capacity, approval agencies, and operating temperature ranges are secondary parameters that do not disqualify substitution but may influence selection based on application-specific requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	Operating Temp (°C)	Product Status
2010.0017	SCHURTER Inc.	FSU 5x20	1	250	Slow Blow	5x20mm	35	3.3	-40 ~ 85	Obsolete
0034.3117	SCHURTER Inc.	FST 5x20	1	250	Slow Blow	5x20mm	35	3.3	-55 ~ 125	Active
0034.3775	SCHURTER Inc.	FSL 5x20	1	250	Slow Blow	5x20mm	35	4.52	-40 ~ 85	Active
0034.5043	SCHURTER Inc.	FTT 5x20	1	250	Slow Blow	5x20mm	35	19.4	-40 ~ 85	Active
0213001.MXP	Littelfuse Inc.	213	1	250	Slow Blow	5x20mm	35	19.2	-55 ~ 125	Active
0218001.HXP	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	-55 ~ 125	Active
BK1/GMD-1-R	Eaton - Electronics Division	GMD	1	250	Slow Blow	5x20mm	100	12	Not specified	Active

Engineering Selection Recommendations

All listed substitute parts are active products and maintain functional compatibility with the obsolete SCHURTER 2010.0017 across mandatory electrical and mechanical parameters.

SCHURTER 0034.3117 provides direct manufacturer continuity within the SCHURTER product line with extended operating temperature range (-55°C ~ 125°C) and identical melting I²t (3.3), making it the primary direct equivalent.

SCHURTER 0034.3775 and 0034.5043 remain within the SCHURTER FSx 5x20 family with active product status and identical breaking capacity, differing only in melting I²t values (4.52 and 19.4 respectively).

Littelfuse 0213001.MXP and 0218001.HXP provide cross-manufacturer alternatives with broader approval agency coverage and extended operating temperature ranges. These parts differ in melting I²t characteristics (19.2 and 6.73 respectively).

Eaton BK1/GMD-1-R offers the highest breaking capacity (100A) among listed substitutes, with melting I²t of 12, and maintains active product status with CSA, PSE/JET, and UL certifications.

Selection should prioritize product status (active vs. obsolete), required approval agencies for the target application, and melting I²t compatibility with circuit design specifications.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.3117 directly replace the obsolete 2010.0017?

A: Yes. Both parts share identical current rating (1A), voltage rating (250V AC), fuse type (cartridge glass), response time (slow blow), and package dimensions (5x20mm). The 0034.3117 is an active product with extended operating temperature range.

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

A: Melting I²t defines the thermal energy required to melt the fuse element. The original 2010.0017 has melting I²t of 3.3. Substitutes with higher values (0034.5043 at 19.4, 0213001.MXP at 19.2) provide slower response to transient overcurrents. Selection depends on circuit protection requirements and tolerance for inrush currents.

Q: Are cross-manufacturer substitutes (Littelfuse, Eaton) electrically equivalent?

A: Yes, within the specified parameters. Littelfuse 0213001.MXP and 0218001.HXP, and Eaton BK1/GMD-1-R all match the mandatory ratings: 1A, 250V AC, slow-blow response, 5x20mm package, and cartridge glass construction. Differences exist in melting I²t, breaking capacity, and approval certifications.

Q: Does breaking capacity affect substitution compatibility?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The original 2010.0017 specifies 35A. Eaton BK1/GMD-1-R offers 100A breaking capacity, which does not disqualify substitution but may provide enhanced protection margin in high-fault-current applications.

Q: Which substitute offers the broadest regulatory compliance?

A: Littelfuse 0213001.MXP carries the most extensive approval agency coverage: BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE. This makes it suitable for applications requiring multi-regional certification.

Q: Can these fuses be used interchangeably in existing fuse holders?

A: Yes. All substitute parts maintain the 5x20mm form factor and cartridge glass construction, requiring the same holder type as the original 2010.0017.

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