Littelfuse 0251007.PARJL PICO® II 251 7A 125VAC/VDC Board Mount Axial Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251007.PARJL is a 7 ampere, 125 volt AC/DC board mount axial fuse from the PICO® II 251 series. This fast-blow fuse is designed for through-hole mounting applications requiring circuit protection in the specified current and voltage range. The part is active in production status with full regulatory approvals (CSA, cURus, TUV) and ROHS3 compliance. Substitute parts are identified based on identical electrical specifications and mechanical compatibility within the PICO® II 251 series, with differences limited to packaging format.

Key Parameters

Parameter	Value
Current Rating	7 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Fast Blow
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.110" Dia x 0.280" L (2.80mm x 7.11mm)
Breaking Capacity @ Rated Voltage	50A AC, 300A DC
Melting I²t	10.4
DC Cold Resistance	0.0107 Ohms
Operating Temperature Range	-55°C ~ 125°C
Series	PICO® II 251
Approval Agencies	CSA, cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 0251007.PARJL are qualified based on strict electrical and mechanical parameter equivalence within the PICO® II 251 series. All substitute parts maintain identical specifications for current rating (7 A), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting type (Through Hole), package style (Axial), physical dimensions (0.110" Dia x 0.280" L), melting I²t (10.4), DC cold resistance (0.0107 Ohms), operating temperature range (-55°C ~ 125°C), and regulatory approvals (CSA, cURus, TUV).

The primary distinction among qualified substitutes is packaging format. The main part 0251007.PARJL is supplied in Tape & Reel (TR) format, while substitute parts 0251007.HAT1L, 0251007.MAT1L, 0251007.MRT1L, and 0251007.NRT1L are supplied in Cut Tape (CT) format. All parts are manufactured by Littelfuse Inc. and carry active product status with ROHS3 compliance and REACH unaffected designation.

Parameter Comparison

Part Number	Manufacturer	Packaging	Current Rating	Voltage AC/DC	Response Time	Breaking Capacity (AC/DC)	Melting I²t	DC Cold Resistance	Inventory Status
0251007.PARJL	Littelfuse Inc.	Tape & Reel (TR)	7 A	125 V / 125 V	Fast Blow	50A / 300A	10.4	0.0107 Ω	1044 Pcs
0251007.HAT1L	Littelfuse Inc.	Cut Tape (CT)	7 A	125 V / 125 V	Fast Blow	50A / 300A	10.4	0.0107 Ω	1012 Pcs
0251007.MAT1L	Littelfuse Inc.	Cut Tape (CT)	7 A	125 V / 125 V	Fast Blow	50A / 300A	10.4	0.0107 Ω	2612 Pcs
0251007.MRT1L	Littelfuse Inc.	Cut Tape (CT)	7 A	125 V / 125 V	Fast Blow	50A / 300A	10.4	0.0107 Ω	2400 Pcs
0251007.NRT1L	Littelfuse Inc.	Cut Tape (CT)	7 A	125 V / 125 V	Fast Blow	50A / 300A	10.4	0.0107 Ω	175060 Pcs

Engineering Selection Recommendations

All substitute parts listed are manufactured by Littelfuse Inc. and maintain active product status. Each part carries identical regulatory approvals (CSA, cURus, TUV), ROHS3 compliance, and REACH unaffected designation. Selection among the qualified substitutes should be based on packaging requirements and inventory availability. The 0251007.NRT1L variant offers the highest inventory level at 175,060 pieces. Parts supplied in Cut Tape (CT) format are suitable for automated assembly processes, while the Tape & Reel (TR) format of the main part accommodates high-speed pick-and-place equipment. All parts are functionally equivalent for circuit protection applications within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can I substitute 0251007.PARJL with any of the listed Cut Tape (CT) variants?

A: Yes. All substitute parts maintain identical electrical specifications, mechanical dimensions, and regulatory approvals. The difference is packaging format only. Substitution is valid provided your assembly process accommodates Cut Tape format.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging supplies components on a continuous reel suitable for high-speed automated assembly. Cut Tape (CT) packaging provides components on tape segments, typically used for lower-volume assembly or manual placement. Both formats contain the same component.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part 0251007.PARJL and all substitute parts (0251007.HAT1L, 0251007.MAT1L, 0251007.MRT1L, 0251007.NRT1L) are ROHS3 compliant and REACH unaffected.

Q: Do the substitute parts have the same breaking capacity?

A: Yes. All parts have identical breaking capacity of 50A AC and 300A DC at rated voltage.

Q: Which substitute part has the best inventory availability?

A: The 0251007.NRT1L variant has the highest inventory level at 175,060 pieces in stock.

Q: Are the physical dimensions identical across all parts?

A: Yes. All parts share identical dimensions of 0.110" diameter by 0.280" length (2.80mm x 7.11mm).

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