Littelfuse 37411000430 Equivalent & Substitute Parts

Part Overview

The Littelfuse 37411000430 is a 1 A, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in TR5® 374 series applications. This fuse is classified as Active product status and is ROHS3 compliant with CSA and cULus approvals. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and mounting configurations are maintained across alternative manufacturer series or product lines, ensuring functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Mounting Type	Through Hole
Package / Case	Radial, Can, Vertical
Size / Dimension	0.335" Dia x 0.315" H (8.50mm x 8.00mm)
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 37411000430 is determined by strict equivalence in the following parameters:

Current Rating: 1 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)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Substitute parts may vary in Breaking Capacity, Melting I²t, DC Cold Resistance, series designation, and approval agency certifications while maintaining functional equivalence. Dimensional tolerance within the specified size range is acceptable. Packaging format (Bulk vs. Cut Tape) does not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Mounting Type	Package / Case	Size / Dimension	Operating Temperature	RoHS Status	Product Status
37411000430	Littelfuse	TR5® 374	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
37211000411	Littelfuse Inc.	TR5® 372	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
37211000431	Littelfuse Inc.	TR5® 372	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
37211000511	Littelfuse	TR5® 372	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
38211000410	Littelfuse Inc.	TR5® 382	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
38211000430	Littelfuse Inc.	TR5® 382	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
0034.7115	SCHURTER Inc.	MSTU 250	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	-40°C ~ 85°C	ROHS3 Compliant	Active
0034.7315	SCHURTER Inc.	MSTU 250	1 A	250 V	Slow Blow	Through Hole	Radial, Can, Vertical	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	-40°C ~ 85°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance. Selection among Littelfuse TR5® 372, TR5® 374, and TR5® 382 series alternatives is based on approval agency requirements and breaking capacity specifications. The TR5® 382 series (38211000410, 38211000430) provides 100 A breaking capacity compared to 50 A in the TR5® 374 series, with expanded approval certifications including CCC, KC, and PSE/JET. The TR5® 372 series (37211000411, 37211000431, 37211000511) offers 35 A breaking capacity with CCC, cURus, PSE, SEMKO, and VDE certifications. SCHURTER MSTU 250 series alternatives (0034.7115, 0034.7315) provide 50 A breaking capacity with cULus approval and are available in both Bulk and Cut Tape packaging formats. Dimensional variation in height (0.315" vs. 0.335") between Littelfuse and SCHURTER products must be evaluated for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can 37211000411 replace 37411000430 in existing designs? A: Yes. Both parts share identical current rating (1 A), voltage rating (250 V AC), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), and operating temperature range (-40°C ~ 85°C). The TR5® 372 series has lower breaking capacity (35 A vs. 50 A) and different approval certifications, which may affect suitability depending on circuit requirements and regional compliance mandates.

Q: What is the difference between Littelfuse and SCHURTER equivalents? A: Littelfuse parts (37211000411, 37211000431, 37211000511, 38211000410, 38211000430) and SCHURTER parts (0034.7115, 0034.7315) are functionally equivalent in electrical ratings and mounting configuration. SCHURTER parts have a slightly larger height dimension (0.335" vs. 0.315") and different approval certifications (cULus only for SCHURTER vs. multiple certifications for Littelfuse). Approval agency requirements and PCB clearance constraints determine selection.

Q: Does packaging format (Bulk vs. Cut Tape) affect compatibility? A: No. Packaging format affects supply chain logistics and handling but does not alter electrical or mechanical compatibility. Parts 0034.7115 (Bulk) and 0034.7315 (Cut Tape) are electrically and mechanically identical.

Q: Why do substitute parts have different Breaking Capacity and Melting I²t values? A: Breaking Capacity and Melting I²t are performance characteristics that vary across fuse series while maintaining the same current and voltage ratings. These parameters determine fault current handling capability and thermal response but do not affect basic circuit protection function at rated current. Application requirements determine whether higher breaking capacity is necessary.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements equivalent to the main part.

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