Littelfuse 38211600430 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 38211600430 is a 1.6 A, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in the TR5® 382 series. This active product is widely used in power distribution and circuit protection applications requiring reliable overcurrent protection. Equivalent and substitute parts are identified when design requirements, supply constraints, or application-specific certifications necessitate alternative component selection while maintaining functional compatibility.

Key Parameters

Parameter	Value
Current Rating	1.6 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

Substitution eligibility for the Littelfuse 38211600430 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Current Rating: 1.6 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can, Vertical (exact match required)
Physical Dimensions: 0.335" Dia x 0.315" H / 8.50mm x 8.00mm (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)

Secondary Considerations:

Breaking Capacity @ Rated Voltage
Melting I²t
DC Cold Resistance
Approval Agency certifications
Series designation (TR5® 382, TR5® 372, TR5® 374)

Parts meeting all primary criteria are classified as direct or parametric equivalents. Variations in secondary parameters (breaking capacity, melting I²t, DC cold resistance) and certification scope do not disqualify substitution but indicate application-specific suitability differences.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Approval Agency	Product Status
38211600430	Littelfuse Inc.	TR5® 382	1.6 A	250 V	Slow Blow	100 A	12.67	0.0377	CCC, cURus, KC, PSE/JET, SEMKO, VDE	Active
38211600410	Littelfuse Inc.	TR5® 382	1.6 A	250 V	Slow Blow	100 A	12.67	0.0377	CCC, cURus, KC, PSE/JET, SEMKO, VDE	Active
37211600411	Littelfuse Inc.	TR5® 372	1.6 A	250 V	Slow Blow	35 A	19.968	0.042	CCC, cURus, PSE, SEMKO, VDE	Active
37211600431	Littelfuse Inc.	TR5® 372	1.6 A	250 V	Slow Blow	35 A	19.968	0.042	CCC, cURus, PSE, SEMKO, VDE	Active
37411600410	Littelfuse Inc.	TR5® 374	1.6 A	250 V	Slow Blow	50 A	4.5	0.054	CSA, cULus	Active
37411600430	Littelfuse Inc.	TR5® 374	1.6 A	250 V	Slow Blow	50 A	4.5	0.054	CSA, cULus	Active

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): Part number 38211600410 is a direct equivalent to 38211600430, sharing identical electrical characteristics, breaking capacity, melting I²t, DC cold resistance, and approval agency certifications. Both are TR5® 382 series components with active product status. Selection between these two parts is based on supply availability and inventory considerations.

Parametric Equivalents (TR5® 372 Series): Part numbers 37211600411 and 37211600431 meet all primary substitution criteria but differ in secondary electrical characteristics. These TR5® 372 series components feature a lower breaking capacity (35 A versus 100 A) and higher melting I²t (19.968 versus 12.67), indicating slower thermal response. Certification scope is narrower (CCC, cURus, PSE, SEMKO, VDE versus CCC, cURus, KC, PSE/JET, SEMKO, VDE), excluding KC and PSE/JET approvals. Selection is appropriate for applications where the reduced breaking capacity and extended thermal response are compatible with circuit requirements and regional certification mandates.

Parametric Equivalents (TR5® 374 Series): Part numbers 37411600410 and 37411600430 meet all primary substitution criteria but feature the lowest breaking capacity (50 A) and lowest melting I²t (4.5), indicating the fastest thermal response among available substitutes. These TR5® 374 series components carry CSA and cULus certifications only, with no CCC, KC, PSE/JET, SEMKO, or VDE approvals. Selection is restricted to applications requiring CSA/cULus compliance and fast-acting protection characteristics.

Certification Alignment: Applications requiring full international certification coverage (CCC, cURus, KC, PSE/JET, SEMKO, VDE) must use 38211600430 or 38211600410. Applications limited to CSA/cULus markets must use 37411600410 or 37411600430. Applications requiring CCC, cURus, PSE, SEMKO, and VDE (excluding KC and PSE/JET) may use 37211600411 or 37211600431.

Frequently Asked Questions (FAQ)

Q: Can 38211600410 be used as a direct replacement for 38211600430? A: Yes. Both parts are TR5® 382 series fuses with identical current rating (1.6 A), voltage rating (250 V), response time (slow blow), breaking capacity (100 A), melting I²t (12.67), DC cold resistance (0.0377 Ohms), and approval agency certifications. They are functionally and electrically interchangeable.

Q: What is the difference between the TR5® 382, TR5® 372, and TR5® 374 series? A: These series designations indicate different thermal response characteristics and breaking capacity ratings. TR5® 382 provides 100 A breaking capacity with 12.67 melting I²t. TR5® 372 provides 35 A breaking capacity with 19.968 melting I²t (slower response). TR5® 374 provides 50 A breaking capacity with 4.5 melting I²t (faster response). All maintain identical current and voltage ratings and physical dimensions.

Q: Can I substitute a TR5® 374 series fuse (37411600410 or 37411600430) for the original 38211600430? A: Substitution is possible only if the application circuit design accommodates the faster thermal response (lower melting I²t of 4.5 versus 12.67) and the reduced breaking capacity (50 A versus 100 A). Additionally, the application must comply with CSA/cULus certification requirements, as TR5® 374 parts lack CCC, KC, PSE/JET, SEMKO, and VDE approvals.

Q: Are there certification differences between substitute parts? A: Yes. The 38211600430 and 38211600410 (TR5® 382) carry CCC, cURus, KC, PSE/JET, SEMKO, and VDE approvals. The 37211600411 and 37211600431 (TR5® 372) carry CCC, cURus, PSE, SEMKO, and VDE approvals (no KC or PSE/JET). The 37411600410 and 37411600430 (TR5® 374) carry only CSA and cULus approvals. Selection must align with regional regulatory requirements.

Q: Do all substitute parts have the same physical dimensions? A: Yes. All listed substitute parts share identical physical dimensions of 0.335" Dia x 0.315" H (8.50mm x 8.00mm) and are packaged as radial, can, vertical through-hole components. They are mechanically interchangeable on PCB layouts.

Q: What is the significance of melting I²t values? A: Melting I²t indicates the thermal energy required to melt the fuse element. Lower values (TR5® 374 at 4.5) indicate faster response to overcurrent conditions. Higher values (TR5® 372 at 19.968) indicate slower response, allowing brief current surges without nuisance tripping. Selection depends on circuit inrush current characteristics and protection speed requirements.

Q: Can I use 37211600411 or 37211600431 if my application requires PSE/JET certification? A: No. The TR5® 372 series (37211600411 and 37211600431) carry PSE certification but not PSE/JET certification. If PSE/JET is a mandatory requirement, only 38211600430 or 38211600410 (TR5® 382 series) are suitable.

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