Equivalent & Substitute Parts for 250R080DR

Part Overview

The Littelfuse 250R080DR is a polymeric PTC resettable fuse rated for 60V (250V internal) with an 80 mA hold current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 250R080DR operates through a radial, disc-shaped package suitable for through-hole mounting applications requiring overcurrent protection in the 60V circuit range.

Key Parameters

Parameter	Value
Voltage - Max	60V (250V Int)
Current - Hold (Ih) (Max)	80 mA
Current - Trip (It)	160 mA
Current - Max	3 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	14 Ohms
Resistance - Post Trip (R1) (Max)	33 Ohms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 250R080DR is determined by the following critical parameters:

Voltage Rating: 60V maximum voltage
Current - Hold (Ih): 80 mA nominal hold current
Package Type: Radial, disc through-hole configuration
Mounting Compatibility: Through-hole lead spacing and physical dimensions
Regulatory Compliance: cURus and TUV approvals; ROHS3 compliance

The 250R080DR has one direct equivalent from Littelfuse (250R080ZR) with identical electrical specifications and packaging. Additional substitutes from Bel Fuse Inc. (0ZRF series) provide functional alternatives with the same voltage and hold current ratings, though with variations in trip current and resistance characteristics that remain within acceptable operating parameters for 60V, 80 mA applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Operating Temperature	Product Status	Packaging
250R080DR	Littelfuse Inc.	60V (250V Int)	80 mA	160 mA	14 Ohms	33 Ohms	-40°C ~ 85°C	Obsolete	Radial, Disc
250R080ZR	Littelfuse Inc.	60V (250V Int)	80 mA	160 mA	14 Ohms	33 Ohms	-40°C ~ 85°C	Active	Cut Tape (CT)
0ZRF0008FF1E	Bel Fuse Inc.	60V	80 mA	240 mA	14 Ohms	33 Ohms	-40°C ~ 85°C	Active	Box
0ZRF0008FF2B	Bel Fuse Inc.	60V	80 mA	240 mA	14 Ohms	33 Ohms	-40°C ~ 85°C	Active	Cut Tape (CT)

Engineering Selection Recommendations

Primary Substitute: The 250R080ZR from Littelfuse is the direct equivalent to the 250R080DR. Both components share identical electrical specifications, operating temperature range, and regulatory certifications (cURus, TUV). The 250R080ZR is currently in active production status and available in Cut Tape packaging, making it the preferred replacement for obsolete 250R080DR applications.

Alternative Substitutes: The Bel Fuse 0ZRF0008FF1E and 0ZRF0008FF2B provide functional alternatives with matching 60V voltage rating and 80 mA hold current. These components differ in trip current (240 mA versus 160 mA) but maintain equivalent resistance characteristics and operating temperature range. Both are ROHS3 compliant and carry cURus and TUV approvals. Selection between Box (0ZRF0008FF1E) and Cut Tape (0ZRF0008FF2B) packaging depends on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can the 250R080ZR directly replace the 250R080DR? A: Yes. The 250R080ZR is electrically and mechanically identical to the 250R080DR. Both components have 60V maximum voltage, 80 mA hold current, 160 mA trip current, and identical resistance specifications. The primary difference is product status (250R080ZR is active) and packaging format (Cut Tape versus standard radial).

Q: What is the difference between the Littelfuse 250R080ZR and Bel Fuse 0ZRF0008FF series? A: Both maintain the same voltage rating (60V) and hold current (80 mA). The Bel Fuse 0ZRF0008FF series has a higher trip current (240 mA versus 160 mA), which affects the speed of overcurrent response. Resistance characteristics remain equivalent. Both manufacturers' components carry identical regulatory approvals.

Q: Does packaging affect electrical performance? A: No. Packaging format (Box, Cut Tape, or Tape & Reel) does not affect electrical performance. Selection is based on procurement volume, assembly automation requirements, and inventory management practices.

Q: Are all substitutes ROHS3 compliant? A: Yes. The 250R080ZR and all Bel Fuse 0ZRF0008FF alternatives are ROHS3 compliant and carry cURus and TUV regulatory approvals, matching the compliance profile of the original 250R080DR.

Q: What is the lead spacing tolerance for through-hole mounting? A: The 250R080DR and 250R080ZR have 0.201" (5.10mm) lead spacing. The Bel Fuse 0ZRF0008FF series has 0.197" (5.00mm) lead spacing. Both are compatible with standard 0.2" (5.08mm) pitch through-hole PCB layouts within normal manufacturing tolerances.

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