Equivalent & Substitute Parts for 0664005.ZRLL

Part Overview

The Littelfuse 0664005.ZRLL is a 5A 250VAC board mount radial fuse with slow blow response characteristics, designed for through-hole vertical mounting applications. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical ratings, mechanical compatibility, and approval certifications to ensure reliable circuit protection without design modification.

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
Fuse Type	Board Mount (Cartridge Style Excluded)
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 0664005.ZRLL are qualified based on the following mandatory parameters:

Current Rating: 5 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)
Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
Breaking Capacity @ Rated Voltage: 100 A (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Two substitute parts meet these criteria: Littelfuse 38215000000 (TR5® 382 series) and SCHURTER 0034.6922 (MXT 250 series). Both maintain electrical equivalence and mechanical compatibility with the original part.

Parameter Comparison

Parameter	0664005.ZRLL (Main)	38215000000 (Littelfuse)	0034.6922 (SCHURTER)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	SCHURTER Inc.
Series	LT-5™ 664	TR5® 382	MXT 250
Current Rating (Amps)	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V
Response Time	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)
Breaking Capacity @ Rated Voltage	100 A	100 A	100 A
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Size / Dimension	0.335" Dia x 0.333" H (8.50mm x 8.45mm)	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
DC Cold Resistance	0.011 Ohms	0.0108 Ohms	Not specified
Melting I²t	155	121.25	155
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing support, addressing the obsolescence status of the original 0664005.ZRLL.

Littelfuse 38215000000 maintains manufacturer continuity within the Littelfuse product family and carries broader international approval certifications (CQC, cURus, KC, PSE/JET, SEMKO, VDE), supporting global deployment requirements. This part is available in Cut Tape packaging with 14,805 units in stock.

SCHURTER 0034.6922 provides cross-manufacturer equivalence with active product status and cURus/PSE/JET certifications. This part is available in Bulk packaging with 2,686 units in stock. Dimensional height is 0.335" (8.50mm), matching the original part exactly.

Both parts satisfy all mandatory electrical and mechanical substitution criteria. Selection between them depends on procurement source availability, packaging requirements, and certification scope needed for the target application.

Frequently Asked Questions (FAQ)

Q: Can 38215000000 be used as a direct replacement for 0664005.ZRLL?

A: Yes. Both parts share identical current rating (5A), voltage rating (250VAC), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), breaking capacity (100A), and operating temperature range (-40°C ~ 85°C). Dimensional height differs by 0.018" (0.45mm), which does not affect board-level compatibility for standard through-hole applications.

Q: Can 0034.6922 be used as a direct replacement for 0664005.ZRLL?

A: Yes. Both parts share identical current rating (5A), voltage rating (250VAC), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), breaking capacity (100A), and operating temperature range (-40°C ~ 85°C). Dimensional specifications are identical (0.335" Dia x 0.335" H).

Q: What is the difference in melting I²t between the main part and substitutes?

A: The 0664005.ZRLL and 0034.6922 both specify melting I²t of 155. The 38215000000 specifies 121.25. Both values fall within acceptable thermal response characteristics for 5A slow blow fuses and do not affect substitution eligibility based on the provided electrical parameters.

Q: Are there packaging differences between substitute options?

A: Yes. The 38215000000 is supplied in Cut Tape (CT) packaging, while 0034.6922 is supplied in Bulk packaging. Packaging selection depends on procurement volume and assembly process requirements.

Q: Which substitute has the broadest international certification coverage?

A: The Littelfuse 38215000000 carries certifications from CQC, cURus, KC, PSE/JET, SEMKO, and VDE. The SCHURTER 0034.6922 carries cURus and PSE/JET certifications. Application requirements determine which certification scope is necessary.

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