Littelfuse 38213150430 Equivalent & Substitute Parts

Part Overview

The Littelfuse 38213150430 is a 3.15 A, 250 V AC/DC board mount radial fuse in the TR5® 382 series. This through-hole component is designed for circuit protection in applications requiring slow-blow response characteristics. The part is active in production with full international compliance certifications including CCC, cURus, KC, PSE/JET, SEMKO, and VDE. Equivalent and substitute parts are identified for applications where series variants, alternative manufacturers, or different packaging configurations are acceptable within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Current Rating	3.15 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 38213150430 are grouped into three categories based on substitution criteria:

Direct Equivalents (Same Series - TR5® 382): Parts sharing identical electrical ratings, response characteristics, and breaking capacity are classified as direct equivalents. These parts maintain the same series designation and approval agencies, ensuring full functional interchangeability.

Parametric Equivalents (TR5® 372 and TR5® 374 Series): Parts with matching current rating (3.15 A), voltage rating (250 V), response time (Slow Blow), mounting type (Through Hole), and physical dimensions (0.335" Dia x 0.315" H) are classified as parametric equivalents. Variations in breaking capacity and melting I²t values reflect different series designs but do not affect basic circuit protection function at the specified ratings.

Cross-Manufacturer Equivalents (SCHURTER MXT 250 Series): The SCHURTER 0034.6980 and 0034.6920 parts meet all core electrical and mechanical parameters. Minor dimensional variation (0.335" Dia x 0.335" H versus 0.335" Dia x 0.315" H) and different melting I²t characteristics are noted but do not preclude substitution in applications where the physical footprint permits the increased height.

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)
38213150430	Littelfuse	TR5® 382	3.15	250	Slow Blow	100	45.35	8.50 x 8.00	0.0176
38213150410	Littelfuse	TR5® 382	3.15	250	Slow Blow	100	45.35	8.50 x 8.00	0.0176
37213150411	Littelfuse	TR5® 372	3.15	250	Slow Blow	35	77.3955	8.50 x 8.00	0.0173
37213150431	Littelfuse	TR5® 372	3.15	250	Slow Blow	35	77.3955	8.50 x 8.00	0.0173
37413150410	Littelfuse	TR5® 374	3.15	250	Slow Blow	50	22	8.50 x 8.00	0.0227
37413150430	Littelfuse	TR5® 374	3.15	250	Slow Blow	50	22	8.50 x 8.00	0.0227
0034.6980	SCHURTER	MXT 250	3.15	250	Slow Blow	100	57	8.50 x 8.50	Not Specified
0034.6920	SCHURTER	MXT 250	3.15	250	Slow Blow	100	57	8.50 x 8.50	Not Specified

Engineering Selection Recommendations

For Direct Replacement: The Littelfuse 38213150430 and 38213150410 are functionally identical within the TR5® 382 series. Selection between these parts is based on packaging availability (Bulk) and inventory status rather than electrical performance.

For TR5® 372 Series Substitution (37213150411, 37213150431): These parts are suitable where the reduced breaking capacity (35 A versus 100 A) and increased melting I²t (77.3955 versus 45.35) align with application requirements. Both parts maintain full compliance with CCC, cURus, PSE, SEMKO, and VDE certifications. The TR5® 372 series provides slower response characteristics due to higher melting I²t values.

For TR5® 374 Series Substitution (37413150410, 37413150430): These parts are suitable where the intermediate breaking capacity (50 A) and reduced melting I²t (22) are acceptable. Certification is limited to CSA and cULus, representing a narrower approval scope compared to the main part. The TR5® 374 series provides faster response characteristics.

For SCHURTER MXT 250 Series Substitution (0034.6980, 0034.6920): The SCHURTER parts maintain 100 A breaking capacity and full international compliance (CCC, cURus, KC, PSE/JET, VDE). The increased height dimension (8.50 mm versus 8.00 mm) must be verified against PCB layout constraints. Packaging differs (Cut Tape for 0034.6980, Bulk for 0034.6920). The melting I²t value (57) falls between the TR5® 382 and TR5® 372 series characteristics.

Frequently Asked Questions (FAQ)

Q: Can I use part 37213150411 as a direct replacement for 38213150430? A: Yes, within applications where the reduced breaking capacity (35 A) and increased melting I²t (77.3955) are acceptable. Both parts share identical current rating (3.15 A), voltage rating (250 V), response time (Slow Blow), and physical dimensions. Verify that the slower response characteristic of the TR5® 372 series aligns with your circuit protection requirements.

Q: What is the difference between the Littelfuse TR5® 382 and TR5® 374 series? A: The primary differences are breaking capacity and melting I²t. The TR5® 382 series (38213150430) provides 100 A breaking capacity with 45.35 melting I²t. The TR5® 374 series (37413150430) provides 50 A breaking capacity with 22 melting I²t, resulting in faster response. Certification scope also differs: TR5® 382 includes CCC, cURus, KC, PSE/JET, SEMKO, and VDE; TR5® 374 includes only CSA and cULus.

Q: Can I substitute the SCHURTER 0034.6980 for the Littelfuse 38213150430? A: Yes, provided the increased height dimension (8.50 mm versus 8.00 mm) does not conflict with PCB layout. Both parts maintain 3.15 A current rating, 250 V voltage rating, Slow Blow response, and 100 A breaking capacity. The SCHURTER part carries equivalent international certifications (CCC, cURus, KC, PSE/JET, VDE).

Q: What is the significance of melting I²t values in fuse selection? A: Melting I²t determines the thermal energy required to melt the fuse element. Higher melting I²t values result in slower response times, suitable for circuits with inrush currents. Lower melting I²t values result in faster response times, suitable for sensitive circuits. Selection must align with the specific circuit protection requirements.

Q: Are there packaging differences between substitute parts? A: Yes. The main part (38213150430) and most Littelfuse substitutes are supplied in Bulk packaging. The SCHURTER 0034.6980 is supplied in Cut Tape (CT) packaging, while the SCHURTER 0034.6920 is supplied in Bulk. Packaging selection depends on assembly process requirements and inventory management practices.

Q: Which substitute part has the widest certification scope? A: The Littelfuse 38213150430 and 38213150410 (TR5® 382 series) carry the broadest certification scope: CCC, cURus, KC, PSE/JET, SEMKO, and VDE. The SCHURTER MXT 250 series (0034.6980, 0034.6920) also carries CCC, cURus, KC, PSE/JET, and VDE certifications. The TR5® 374 series is limited to CSA and cULus certifications.

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