Equivalent & Substitute Parts for 5STP 1-R Glass Cartridge Fuse

Part Overview

The 5STP 1-R is a 1 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm × 20mm through-hole package. This component is in active product status and carries multiple international certifications including CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure reliable circuit protection in applications requiring 1 A fusing at 250 V.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm × 20mm (Axial)
Mounting Type	Through Hole
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

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

Secondary Considerations:

Breaking Capacity @ Rated Voltage (varies by manufacturer)
Melting I²t (varies by manufacturer)
DC Cold Resistance (varies by manufacturer)
Approval Agency certifications (must include relevant regional standards)
RoHS and REACH compliance status

All identified substitutes meet the primary matching parameters. Variations in breaking capacity, melting I²t, and DC cold resistance reflect manufacturer-specific design differences while maintaining functional equivalence for 1 A, 250 V circuit protection applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	Approval Agency	Product Status
5STP 1-R	Bel Fuse Inc.	1	250	Slow Blow	5mm × 20mm	35	2.4	0.095	CCC, CE, CSA, cURus, IMQ, SEMKO, VDE	Active
5ETP 1-R	Bel Fuse Inc.	1	250	Slow Blow	5mm × 20mm	150	28	0.11	CCC, CE, CSA, cULus, SEMKO, VDE	Active
5TTP 1-R	Bel Fuse Inc.	1	250	Slow Blow	5mm × 20mm	100	8.63	0.27	CE, CSA, cULus, PSE	Active
0034.3117.PT	SCHURTER Inc.	1	250	Slow Blow	5mm × 20mm	35	3.3	Not specified	cURus	Active
0034.3117.TR	SCHURTER Inc.	1	250	Slow Blow	5mm × 20mm	35	3.3	Not specified	cURus	Active
0218001.MXEP	Littelfuse Inc.	1	250	Slow Blow	5mm × 20mm	35	6.73	0.0613	CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, VDE	Active
BK/S506-V-1-R	Eaton - Electronics Division	1	250	Slow Blow	5mm × 20mm	35	6.45	0.0757	BSI, CCC, CSA, CURUS, IMQ, PSE/JET, SEMKO, VDE	Active
TSC-P-1A	OptiFuse	1	250	Slow Blow	5mm × 20mm	100	2.242	Not specified	cULus, UL 248	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status and are ROHS3 compliant. Selection among equivalent options should be based on:

Certification Alignment: The 5STP 1-R carries the broadest certification portfolio (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE). When regional compliance requirements are less stringent, alternatives with narrower certification scopes (such as 0034.3117.PT with cURus only) may be acceptable if the target application does not require those additional certifications.

Manufacturer Availability: The 0218001.MXEP (Littelfuse) and BK/S506-V-1-R (Eaton) offer comprehensive international certifications comparable to the main part, making them suitable for applications requiring broad geographic compliance.

Breaking Capacity Considerations: The 5ETP 1-R and TSC-P-1A provide higher breaking capacity (150 A and 100 A respectively) compared to the 5STP 1-R (35 A). These are suitable for applications where higher fault current withstand capability is required.

Packaging Format: The 0034.3117.PT is supplied in bulk packaging, while 0034.3117.TR is supplied in cut tape format. Selection depends on assembly process requirements and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Can I substitute 5ETP 1-R for 5STP 1-R in my circuit?

A: Yes. Both parts share identical electrical ratings (1 A, 250 V AC/DC, slow-blow response) and mechanical dimensions (5mm × 20mm through-hole). The 5ETP 1-R has a higher breaking capacity (150 A vs. 35 A) and higher melting I²t (28 vs. 2.4), which provides enhanced performance in high fault-current environments without affecting normal operation.

Q: What is the difference between 0034.3117.PT and 0034.3117.TR?

A: These SCHURTER parts are electrically and mechanically identical. The difference is packaging: 0034.3117.PT is supplied in bulk, while 0034.3117.TR is supplied in cut tape format. Both are suitable for through-hole assembly and carry the same electrical specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

Q: Which substitute has the lowest DC cold resistance?

A: The 0218001.MXEP (Littelfuse) has the lowest DC cold resistance at 0.0613 Ohms, followed by BK/S506-V-1-R (Eaton) at 0.0757 Ohms. Lower resistance reduces voltage drop across the fuse during normal operation.

Q: Can I use TSC-P-1A as a direct replacement?

A: Yes. The TSC-P-1A (OptiFuse) meets all primary matching parameters and is mechanically and electrically compatible. It carries UL 248 and cULus certifications. The melting I²t (2.242) is lower than the 5STP 1-R (2.4), indicating slightly faster response to overcurrent conditions.

Q: What certifications should I verify for my application?

A: Verify that the selected substitute part carries all certifications required by your target market and application standards. The 5STP 1-R, 5ETP 1-R, 0218001.MXEP, and BK/S506-V-1-R offer the broadest certification coverage across CCC, CE, CSA, and VDE standards.

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