Littelfuse 38211000430 Board Mount Fuse 1A 250VAC Radial Equivalent & Substitute Parts

Part Overview

The Littelfuse 38211000430 is a 1 A, 250 V AC/DC board mount fuse with radial, can, vertical package configuration. This TR5® 382 series fuse is designed for through-hole mounting applications requiring slow-blow response characteristics. The part is active in production with full inventory availability. Equivalent and substitute parts may be required due to supply constraints, design revisions, or specific approval agency requirements across different regional markets and application standards.

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)
Breaking Capacity @ Rated Voltage	100A
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of electrical and mechanical parameters. All substitute parts listed maintain the core functional requirements: 1 A current rating, 250 V AC voltage rating, slow-blow response, through-hole mounting, and radial can vertical package configuration. Substitutes are grouped into two categories:

Direct Manufacturer Equivalents (Littelfuse TR5® 382 Series): Part 38211000410 shares identical electrical specifications, breaking capacity (100A), melting I²t (4.85), and physical dimensions with the main part. This represents a direct functional equivalent within the same product series.

Parametric Equivalents (Littelfuse TR5® 372 and 374 Series): Parts 37211000411, 37211000431, 37211000511, 37411000410, and 37411000430 maintain identical current rating, voltage rating, response time, mounting type, package configuration, and operating temperature range. These parts differ in breaking capacity and melting I²t values, which are secondary performance characteristics that do not affect primary circuit protection function at rated specifications.

Cross-Manufacturer Equivalents (SCHURTER MXT 250 Series): Parts 0034.6915 and 0034.6975 provide functional equivalence with matching electrical ratings, response characteristics, and package dimensions. The 0034.6975 variant differs only in packaging format (Cut Tape versus Bulk).

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Response Time	Breaking Capacity (A)	Melting I²t	Size (mm)	DC Cold Resistance (Ω)	Approval Agencies
38211000430	Littelfuse	TR5® 382	1	250	Slow Blow	100	4.85	8.50 x 8.00	0.0625	CCC, cURus, KC, PSE/JET, SEMKO, VDE
38211000410	Littelfuse	TR5® 382	1	250	Slow Blow	100	4.85	8.50 x 8.00	0.0625	CCC, cURus, KC, PSE/JET, SEMKO, VDE
37211000411	Littelfuse	TR5® 372	1	250	Slow Blow	35	7.5	8.50 x 8.00	0.079	CCC, cURus, PSE, SEMKO, VDE
37211000431	Littelfuse	TR5® 372	1	250	Slow Blow	35	7.5	8.50 x 8.00	0.079	CCC, cURus, PSE, SEMKO, VDE
37211000511	Littelfuse	TR5® 372	1	250	Slow Blow	35	7.5	8.50 x 8.00	0.079	CCC, cURus, PSE, SEMKO, VDE
37411000410	Littelfuse	TR5® 374	1	250	Slow Blow	50	2.1	8.50 x 8.00	0.105	CSA, cULus
37411000430	Littelfuse	TR5® 374	1	250	Slow Blow	50	2.1	8.50 x 8.00	0.105	CSA, cULus
0034.6915	SCHURTER	MXT 250	1	250	Slow Blow	100	4.4	8.50 x 8.50	—	CCC, cURus, KC, PSE/JET, VDE
0034.6975	SCHURTER	MXT 250	1	250	Slow Blow	100	4.4	8.50 x 8.50	—	CCC, cURus, KC, PSE/JET, VDE

Engineering Selection Recommendations

For Direct Replacement: Part 38211000410 provides identical electrical and mechanical specifications within the Littelfuse TR5® 382 series. Both parts carry the same approval agencies (CCC, cURus, KC, PSE/JET, SEMKO, VDE) and are suitable for direct substitution without design modification.

For Littelfuse TR5® 372 Series Substitution: Parts 37211000411, 37211000431, and 37211000511 are functionally equivalent at rated specifications but carry reduced approval agency coverage (PSE replaces PSE/JET; SEMKO retained; KC and SEMKO removed). These parts are suitable where application requirements align with CSA, cURus, PSE, SEMKO, and VDE standards.

For Littelfuse TR5® 374 Series Substitution: Parts 37411000410 and 37411000430 are functionally equivalent at rated specifications but carry limited approval agency coverage (CSA and cULus only). These parts are suitable for applications requiring CSA or cULus certification exclusively.

For SCHURTER MXT 250 Series Substitution: Parts 0034.6915 and 0034.6975 provide functional equivalence with comparable breaking capacity and approval agency coverage. The 0034.6975 variant in Cut Tape packaging may require reel management considerations compared to Bulk packaging of 0034.6915. Physical dimension variance (8.50mm height versus 8.00mm) must be evaluated for PCB layout clearance.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and operating temperature range of -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can 38211000410 be used as a direct replacement for 38211000430? A: Yes. Both parts are Littelfuse TR5® 382 series with identical current rating (1 A), voltage rating (250 V AC), breaking capacity (100 A), melting I²t (4.85), physical dimensions (8.50mm x 8.00mm), and approval agencies. No design modification is required.

Q: What is the difference between TR5® 382, 372, and 374 series fuses? A: The series designation indicates different performance characteristics. TR5® 382 provides 100 A breaking capacity with 4.85 melting I²t. TR5® 372 provides 35 A breaking capacity with 7.5 melting I²t. TR5® 374 provides 50 A breaking capacity with 2.1 melting I²t. All maintain identical 1 A current rating and 250 V voltage rating at rated specifications.

Q: Are SCHURTER 0034.6915 and 0034.6975 interchangeable? A: Yes, electrically and mechanically. The only difference is packaging format: 0034.6915 is supplied in Bulk packaging, while 0034.6975 is supplied in Cut Tape (CT) format. Both parts have identical electrical specifications and physical dimensions (8.50mm x 8.50mm).

Q: Does the physical dimension difference between Littelfuse (8.50mm x 8.00mm) and SCHURTER (8.50mm x 8.50mm) affect compatibility? A: The height difference (8.00mm versus 8.50mm) must be evaluated for PCB layout clearance and component spacing. Diameter remains identical at 8.50mm. Verify available vertical clearance in the application before substitution.

Q: Which substitute parts maintain the same approval agency coverage as 38211000430? A: Part 38211000410 (Littelfuse TR5® 382) maintains identical approval agencies: CCC, cURus, KC, PSE/JET, SEMKO, VDE. SCHURTER parts 0034.6915 and 0034.6975 maintain CCC, cURus, KC, PSE/JET, and VDE (SEMKO not listed).

Q: Can TR5® 372 or 374 series parts be used if the application requires SEMKO certification? A: TR5® 372 series parts (37211000411, 37211000431, 37211000511) retain SEMKO certification. TR5® 374 series parts (37411000410, 37411000430) do not list SEMKO certification. Verify application requirements before substitution.

Q: What does "Slow Blow" response time mean? A: Slow Blow fuses tolerate temporary inrush currents without nuisance operation, providing delayed response to sustained overcurrent conditions. All listed substitute parts maintain this characteristic.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance status and REACH unaffected designation.

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