SCHURTER 0034.7122 Board Mount Fuse – Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.7122 is a 5 A, 250 V AC/DC board mount fuse with radial, can, vertical package configuration. This slow-blow fuse is designed for through-hole mounting applications and is currently active in production. Equivalent and substitute parts may be required due to inventory availability, lead time considerations, or specific application compliance requirements across different manufacturing regions.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Mounting Type	Through Hole
Package / Case	Radial, Can, Vertical
Fuse Type	Board Mount (Cartridge Style Excluded)
Operating Temperature Range	-40°C ~ 85°C
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
Breaking Capacity @ Rated Voltage	50 A
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.7122 is determined by strict alignment of the following parameters:

Current Rating: 5 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can, Vertical (exact match required)
Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Size / Dimension: 0.335" Dia x 0.335" H (8.50mm x 8.50mm) (exact match required)

Substitute parts are classified into two categories:

Parametric Equivalents: Parts that match all critical electrical and mechanical parameters. These include SCHURTER 0034.6922 and SCHURTER 0034.7222.

Similar Parts: Parts that match all critical electrical and mechanical parameters but may have minor variations in secondary specifications such as breaking capacity or melting I²t. This category includes Littelfuse 37415000410.

Parameter Comparison

Parameter	SCHURTER 0034.7122	SCHURTER 0034.6922	SCHURTER 0034.7222	Littelfuse 37415000410
Manufacturer	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.	Littelfuse Inc.
Current Rating (Amps)	5 A	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.315" H (8.50mm x 8.00mm)
Breaking Capacity @ Rated Voltage	50 A	100 A	50 A	50 A
Melting I²t	142	155	142	59
Approval Agency	cULus	cURus, PSE/JET	cULus	CSA, cULus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturing status and ROHS3 compliance. Selection between the main part and substitutes should be based on the following criteria:

SCHURTER 0034.7122 (Primary Part): Recommended for applications requiring cULus certification exclusively. Current inventory: 1133 pcs.

SCHURTER 0034.6922 (Parametric Equivalent): Suitable for applications where higher breaking capacity (100 A vs. 50 A) is beneficial. Holds cURus and PSE/JET certifications in addition to cULus coverage. Current inventory: 2686 pcs. Note: Melting I²t is 155 compared to 142 in the primary part.

SCHURTER 0034.7222 (Parametric Equivalent): Functionally identical to the primary part with matching breaking capacity (50 A) and melting I²t (142). Holds cULus certification. Current inventory: 1112 pcs.

Littelfuse 37415000410 (Similar Part): Suitable for applications where cross-manufacturer qualification is acceptable. Holds CSA and cULus certifications. Height dimension is 0.315" H (8.00mm) versus 0.335" H (8.50mm) in other parts. Melting I²t is 59, significantly lower than other options. Current inventory: 2465 pcs.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.6922 be used as a direct replacement for SCHURTER 0034.7122?

A: Yes. Both parts share identical electrical ratings (5 A, 250 V AC/DC), response time (Slow Blow), mounting configuration (Through Hole, Radial, Can, Vertical), and physical dimensions (0.335" Dia x 0.335" H). The primary difference is the higher breaking capacity (100 A vs. 50 A) and expanded regional certifications (cURus, PSE/JET in addition to cULus).

Q: What is the significance of the melting I²t difference between parts?

A: Melting I²t is a thermal characteristic that defines the fuse's response to overcurrent conditions. SCHURTER 0034.7122 and 0034.7222 both have a melting I²t of 142, while SCHURTER 0034.6922 has 155 and Littelfuse 37415000410 has 59. These values must align with circuit protection requirements; substitution is valid only when the application design accommodates the specified melting I²t value.

Q: Is the Littelfuse 37415000410 compatible with the same PCB footprint?

A: The Littelfuse part has a height dimension of 0.315" H (8.00mm) compared to 0.335" H (8.50mm) for SCHURTER parts. While the diameter remains 0.335" (8.50mm), the reduced height may affect clearance in space-constrained applications. PCB layout verification is necessary before substitution.

Q: Which substitute part has the broadest regional certification coverage?

A: SCHURTER 0034.6922 holds cURus and PSE/JET certifications in addition to cULus, providing the widest regional approval scope among the listed substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts—SCHURTER 0034.7122, 0034.6922, 0034.7222, and Littelfuse 37415000410—are ROHS3 compliant and REACH unaffected.

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