Littelfuse 38212500430 Equivalent & Substitute Parts

Part Overview

The Littelfuse 38212500430 is a 2.5 A, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in radial can vertical package configuration. This TR5® 382 series fuse is an active product with full international compliance certifications including CCC, cURus, KC, PSE/JET, SEMKO, and VDE approvals. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and mounting configurations are maintained across the allowed parameter set, enabling direct replacement in circuit designs where the primary part becomes unavailable.

Key Parameters

Parameter	Value
Current Rating	2.5 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

Substitute parts for the Littelfuse 38212500430 are classified based on strict equivalence of the following parameters: current rating (2.5 A), voltage rating (250 V AC), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), and physical dimensions (0.335" Dia x 0.315" H / 8.50mm x 8.00mm). All substitute parts maintain these core electrical and mechanical specifications. Variations in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications are noted but do not disqualify substitution eligibility when the primary parameters remain constant. Parts are grouped by manufacturer and series designation to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Size (mm)	Inventory (Pcs)
38212500430	Littelfuse Inc.	TR5® 382	2.5	250	Slow Blow	100A	29.69	0.0215	8.50 x 8.00	775
38212500410	Littelfuse Inc.	TR5® 382	2.5	250	Slow Blow	100A	29.69	0.0215	8.50 x 8.00	1103
37212500411	Littelfuse Inc.	TR5® 372	2.5	250	Slow Blow	35A	35	0.022	8.50 x 8.00	5394
37212500431	Littelfuse Inc.	TR5® 372	2.5	250	Slow Blow	35A	35	0.022	8.50 x 8.00	1177
37412500410	Littelfuse	TR5® 374	2.5	250	Slow Blow	50A	14	0.03	8.50 x 8.00	1772
37412500430	Littelfuse Inc.	TR5® 374	2.5	250	Slow Blow	50A	14	0.03	8.50 x 8.00	1220
0034.6919	SCHURTER Inc.	MXT 250	2.5	250	Slow Blow	100A	32	Not Specified	8.50 x 8.50	968

Engineering Selection Recommendations

Littelfuse TR5® 382 Series (38212500430 / 38212500410): These parts are direct equivalents with identical electrical characteristics, breaking capacity (100A), and melting I²t (29.69). The primary difference is packaging designation (tube vs. bulk). Both maintain full international compliance including CCC, cURus, KC, PSE/JET, SEMKO, and VDE certifications. Selection between these two is based on inventory availability and packaging requirements.

Littelfuse TR5® 372 Series (37212500411 / 37212500431): These parts maintain equivalent current, voltage, and response time ratings with identical physical dimensions. Breaking capacity is reduced to 35A and melting I²t increases to 35. Approval agencies include CCC, cURus, PSE, SEMKO, and VDE (KC certification is not listed). These parts are suitable for applications where the lower breaking capacity is acceptable and the specified certifications meet system requirements.

Littelfuse TR5® 374 Series (37412500410 / 37412500430): These parts maintain equivalent current, voltage, and response time ratings with identical physical dimensions. Breaking capacity is 50A and melting I²t is 14. Approval agencies are limited to CSA and cULus. These parts are suitable for applications where CSA/cULus certification is the primary compliance requirement and the specified breaking capacity and melting I²t characteristics are acceptable.

SCHURTER MXT 250 Series (0034.6919): This cross-manufacturer substitute maintains equivalent current, voltage, and response time ratings. Physical height is 8.50mm (matching the main part), with diameter also 8.50mm. Breaking capacity is 100A and melting I²t is 32. Approval agencies include CCC, cURus, KC, PSE/JET, and VDE. This part is suitable for applications requiring cross-manufacturer flexibility with comparable electrical performance.

Frequently Asked Questions (FAQ)

Q: Can I substitute 37212500411 or 37212500431 for the 38212500430?

A: Yes, these parts are electrically and mechanically equivalent in current rating (2.5 A), voltage rating (250 V AC), response time (Slow Blow), mounting type (Through Hole), and physical dimensions (8.50mm x 8.00mm). The primary differences are reduced breaking capacity (35A vs. 100A) and different approval agency certifications. Substitution is valid when the application does not require the higher breaking capacity or when the specified certifications (CCC, cURus, PSE, SEMKO, VDE) are acceptable.

Q: What is the difference between the TR5® 382, 372, and 374 series?

A: All three series maintain the same current rating (2.5 A), voltage rating (250 V AC), response time (Slow Blow), and physical dimensions (8.50mm x 8.00mm). The series designation reflects differences in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications. The TR5® 382 series has the highest breaking capacity (100A) and is approved by the broadest set of agencies. The TR5® 372 series has a lower breaking capacity (35A) with higher melting I²t (35). The TR5® 374 series has a mid-range breaking capacity (50A) with the lowest melting I²t (14) and is limited to CSA/cULus certification.

Q: Is the SCHURTER 0034.6919 a direct replacement for the Littelfuse 38212500430?

A: The SCHURTER 0034.6919 is a cross-manufacturer equivalent with matching current rating (2.5 A), voltage rating (250 V AC), response time (Slow Blow), and mounting type (Through Hole). Physical dimensions are 8.50mm diameter x 8.50mm height (the main part is 8.50mm diameter x 8.00mm height). Breaking capacity is 100A and melting I²t is 32. This part is suitable for applications where cross-manufacturer sourcing is acceptable and the slightly increased height does not create mechanical constraints.

Q: What packaging options are available?

A: The 38212500430 is supplied in tube packaging, while the 38212500410 is supplied in bulk packaging. All other substitute parts listed are supplied in bulk packaging. Packaging selection depends on assembly process requirements and inventory management practices.

Q: Which substitute part has the broadest compliance certifications?

A: The Littelfuse 38212500430 and 38212500410 (TR5® 382 series) and the SCHURTER 0034.6919 all carry CCC, cURus, KC, PSE/JET, SEMKO, and VDE certifications. The TR5® 372 series lacks KC certification. The TR5® 374 series is limited to CSA and cULus certifications. Selection based on compliance requirements should prioritize the TR5® 382 series or SCHURTER MXT 250 series when the full certification set is mandatory.

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