Littelfuse 38215000430 Equivalent & Substitute Parts

Part Overview

The Littelfuse 38215000430 is a 5 A, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in TR5® 382 series applications. This component is active in production and widely used in power distribution and circuit protection applications. Substitute parts may be required due to inventory constraints, regional availability, or specific certification requirements for end-use applications.

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
Size / Dimension	0.335" Dia x 0.315" H (8.50mm x 8.00mm)
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 38215000430 is determined by strict alignment of the following critical parameters:

Current Rating: 5 A (mandatory match)
Voltage Rating (AC): 250 V (mandatory match)
Response Time: Slow Blow (mandatory match)
Mounting Type: Through Hole (mandatory match)
Package / Case: Radial, Can, Vertical (mandatory match)
Operating Temperature Range: -40°C ~ 85°C (mandatory match)
RoHS Status: ROHS3 Compliant (mandatory match)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Littelfuse): Parts 38215000410 and 0034.6922 (SCHURTER) share identical electrical and mechanical specifications with the main part, including breaking capacity and melting I²t characteristics.

Parametric Equivalents (Littelfuse TR5® 372 and TR5® 374 Series): Parts 37215000411, 37215000431, 37415000410, and 37415000430 maintain all mandatory parameters but differ in breaking capacity and melting I²t values. These parts are suitable for applications where the lower breaking capacity specifications are acceptable.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Response Time	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	Size (mm)
38215000430	Littelfuse	TR5® 382	5	250	Slow Blow	100	121.25	0.0108	8.50 x 8.00
38215000410	Littelfuse	TR5® 382	5	250	Slow Blow	100	121.25	0.0108	8.50 x 8.00
37215000411	Littelfuse	TR5® 372	5	250	Slow Blow	50	115	0.0094	8.50 x 8.00
37215000431	Littelfuse	TR5® 372	5	250	Slow Blow	50	115	0.0094	8.50 x 8.00
37415000410	Littelfuse	TR5® 374	5	250	Slow Blow	50	59	0.0122	8.50 x 8.00
37415000430	Littelfuse	TR5® 374	5	250	Slow Blow	50	59	0.0122	8.50 x 8.00
0034.6922	SCHURTER	MXT 250	5	250	Slow Blow	100	155	—	8.50 x 8.50

Engineering Selection Recommendations

For Direct Replacement (No Application Redesign Required):

Part 38215000410 (Littelfuse TR5® 382) is the primary direct equivalent, offering identical electrical performance and breaking capacity specifications. Both parts carry active product status and ROHS3 compliance.

Part 0034.6922 (SCHURTER MXT 250) provides equivalent breaking capacity (100 A) and melting I²t performance. Physical dimension variance (8.50mm x 8.50mm vs. 8.50mm x 8.00mm height) must be evaluated for PCB layout compatibility. Certification scope differs: SCHURTER carries cURus and PSE/JET approvals versus Littelfuse's broader certification portfolio (CQC, cURus, KC, PSE/JET, SEMKO, VDE).

For Applications Accepting Lower Breaking Capacity:

Littelfuse TR5® 372 series (37215000411, 37215000431) and TR5® 374 series (37415000410, 37415000430) maintain all mandatory electrical parameters but operate at 50 A breaking capacity. These parts are suitable only where circuit protection requirements do not demand the 100 A breaking capacity of the main part. TR5® 374 series exhibits higher DC cold resistance (0.0122 Ohms) compared to the main part (0.0108 Ohms).

Certification Considerations:

The main part 38215000430 carries the broadest approval agency coverage (CQC, cURus, KC, PSE/JET, SEMKO, VDE). TR5® 372 series parts reduce to CCC, cURus, PSE, SEMKO, VDE. TR5® 374 series parts are limited to CSA and cULus. Application-specific regulatory requirements must determine acceptable substitutes.

Frequently Asked Questions (FAQ)

Q: Can 37215000411 or 37215000431 replace 38215000430 in all applications?

A: These parts maintain identical current rating, voltage rating, response time, mounting type, and package specifications. However, breaking capacity is reduced from 100 A to 50 A. Substitution is valid only where the application's fault current does not exceed 50 A at rated voltage.

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

A: Melting I²t defines the thermal energy required to melt the fuse element. The main part (121.25) and SCHURTER 0034.6922 (155) have higher values than TR5® 372 (115) and TR5® 374 (59) series. This affects response time characteristics under transient overcurrent conditions. Selection must align with circuit protection coordination requirements.

Q: Is the SCHURTER 0034.6922 physically compatible with the PCB footprint?

A: The SCHURTER part has a height of 8.50mm versus the main part's 8.00mm. PCB layout clearance must be verified before substitution. Radial diameter is identical (8.50mm).

Q: Which substitute part has the broadest certification coverage?

A: The main part 38215000430 carries certifications from CQC, cURus, KC, PSE/JET, SEMKO, and VDE. Direct equivalent 38215000410 matches this coverage. SCHURTER 0034.6922 is limited to cURus and PSE/JET. TR5® 372 and TR5® 374 series have reduced certification scope. Application regulatory requirements determine acceptable alternatives.

Q: Can I use 37415000410 or 37415000430 as substitutes?

A: These TR5® 374 series parts meet all mandatory electrical and mechanical parameters. However, they exhibit the lowest melting I²t (59) and highest DC cold resistance (0.0122 Ohms) among available substitutes. Use is restricted to applications where these characteristics do not compromise circuit protection performance.

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