Littelfuse TR5® 37411600430 Board Mount Fuse 1.6A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 37411600430 is a board mount fuse rated for 1.6A at 250VAC, designed for through-hole radial mounting in the TR5® 374 series. This component is classified as Active and maintains full inventory availability with 716 units in stock. Board mount fuses of this specification are essential in circuit protection applications where reliable overcurrent interruption and thermal management are required. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical form factors, and thermal characteristics that ensure functional interchangeability within the specified operating parameters.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Board Mount (Cartridge Style Excluded)
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 37411600430 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Same Series - TR5® 374):

37411600410: Identical electrical ratings, same series, same physical dimensions, same approval agencies (CSA, cULus)

Parametric Equivalents (Alternative Series - TR5® 372 and TR5® 382):

37211600411 and 37211600431 (TR5® 372 series): Match current, voltage, response time, mounting type, and physical dimensions. Differ in breaking capacity (35A vs. 50A), melting I²t (19.968 vs. 4.5), DC cold resistance (0.042 vs. 0.054 Ohms), and approval agencies
38211600410 and 38211600430 (TR5® 382 series): Match current, voltage, response time, mounting type, and physical dimensions. Differ in breaking capacity (100A vs. 50A), melting I²t (12.67 vs. 4.5), DC cold resistance (0.0377 vs. 0.054 Ohms), and approval agencies

Cross-Manufacturer Equivalents (SCHURTER MSTU 250 Series):

0034.7117 and 0034.7317: Match current, voltage, response time, mounting type, and fuse type. Differ in physical height (0.335" H vs. 0.315" H), breaking capacity (50A), melting I²t (17.5 vs. 4.5), and approval agencies (cULus only)

Substitution is permitted when the target application tolerates differences in breaking capacity, thermal response characteristics (melting I²t), and regulatory certifications.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	Size (mm)	Approval Agencies
37411600430	Littelfuse	TR5® 374	1.6	250	Slow Blow	50	4.5	0.054	8.50 x 8.00	CSA, cULus
37411600410	Littelfuse	TR5® 374	1.6	250	Slow Blow	50	4.5	0.054	8.50 x 8.00	CSA, cULus
37211600411	Littelfuse	TR5® 372	1.6	250	Slow Blow	35	19.968	0.042	8.50 x 8.00	CCC, cURus, PSE, SEMKO, VDE
37211600431	Littelfuse	TR5® 372	1.6	250	Slow Blow	35	19.968	0.042	8.50 x 8.00	CCC, cURus, PSE, SEMKO, VDE
38211600410	Littelfuse	TR5® 382	1.6	250	Slow Blow	100	12.67	0.0377	8.50 x 8.00	CCC, cURus, KC, PSE/JET, SEMKO, VDE
38211600430	Littelfuse	TR5® 382	1.6	250	Slow Blow	100	12.67	0.0377	8.50 x 8.00	CCC, cURus, KC, PSE/JET, SEMKO, VDE
0034.7117	SCHURTER	MSTU 250	1.6	250	Slow Blow	50	17.5	Not specified	8.50 x 8.50	cULus
0034.7317	SCHURTER	MSTU 250	1.6	250	Slow Blow	50	17.5	Not specified	8.50 x 8.50	cULus

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required): Select 37411600410 when inventory of the primary part 37411600430 is unavailable. Both parts are identical in electrical performance, thermal response, physical dimensions, and regulatory certifications within the TR5® 374 series.

For Applications Requiring Extended Regulatory Coverage: The TR5® 382 series (38211600410, 38211600430) provides broader international certification coverage including CCC, KC, PSE/JET, and VDE in addition to cULus. These parts are suitable when designs must comply with multiple regional standards. The higher breaking capacity (100A) and lower DC cold resistance (0.0377 Ohms) represent enhanced performance characteristics.

For Applications with Relaxed Certification Requirements: The TR5® 372 series (37211600411, 37211600431) offers alternative certification pathways (CCC, PSE, SEMKO, VDE) and higher melting I²t (19.968), providing slower thermal response. These parts are applicable in designs where CSA certification is not mandatory.

For Cross-Manufacturer Substitution: SCHURTER MSTU 250 series parts (0034.7117, 0034.7317) maintain electrical equivalence but introduce a 0.5mm height increase (8.50mm vs. 8.00mm). These parts are suitable only when PCB layout and mechanical clearance accommodate the dimensional variance. Certification is limited to cULus.

Product Status Consideration: All listed parts maintain Active status with confirmed inventory availability, ensuring supply chain reliability for production and replacement applications.

Frequently Asked Questions (FAQ)

Q: Can 37411600410 be used as a direct replacement for 37411600430? A: Yes. Both parts are identical in current rating (1.6A), voltage rating (250VAC), response time (Slow Blow), physical dimensions (8.50mm x 8.00mm), breaking capacity (50A), and approval agencies (CSA, cULus). They are interchangeable without design modification.

Q: What is the primary difference between TR5® 374, TR5® 372, and TR5® 382 series fuses? A: The series designation reflects differences in breaking capacity, melting I²t, and regulatory certifications. TR5® 374 provides 50A breaking capacity with CSA/cULus certification. TR5® 372 offers 35A breaking capacity with broader international certifications (CCC, PSE, SEMKO, VDE). TR5® 382 provides the highest breaking capacity (100A) with the most extensive certification coverage.

Q: Can SCHURTER 0034.7317 replace Littelfuse 37411600430 in existing designs? A: Electrical substitution is possible due to matching current, voltage, and response time ratings. However, the SCHURTER part is 0.5mm taller (8.50mm vs. 8.00mm). PCB layout and mechanical clearance must be verified before implementation. Certification is limited to cULus, which may not satisfy all design requirements.

Q: What does melting I²t indicate, and why does it vary across series? A: Melting I²t is a thermal characteristic that defines the fuse's response speed to overcurrent conditions. Lower values (4.5 for TR5® 374) indicate faster thermal response. Higher values (19.968 for TR5® 372, 12.67 for TR5® 382) indicate slower response. Selection depends on circuit protection requirements and tolerance for transient current spikes.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed parts, including Littelfuse TR5® series and SCHURTER MSTU 250 series, maintain ROHS3 compliance and REACH Unaffected status.

Q: What is the difference between Bulk and Cut Tape (CT) packaging? A: Packaging format affects handling and assembly processes. Bulk packaging is suitable for high-volume automated assembly. Cut Tape (CT) packaging provides individual component separation for lower-volume or manual assembly operations. Electrical and mechanical specifications remain identical regardless of packaging format.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message