LVR005S-2 Equivalent & Substitute Parts

Part Overview

The LVR005S-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® LVR series. This component is rated for 240V (265V internal) with a 50 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Max	240V (265V Int)
Current - Hold (Ih) (Max)	50 mA
Current - Trip (It)	120 mA
Resistance - Initial (Ri) (Min)	18.5 Ohms
Resistance - Post Trip (R1) (Max)	65 Ohms
Operating Temperature	-20°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.200" (5.08mm)

Substitute Part Grouping Explanation

Substitution eligibility for the LVR005S-2 is determined by the following critical parameters:

Voltage rating of 240V maximum
Hold current (Ih) of 50 mA maximum
Trip current (It) of 120 mA
Through-hole radial disc mounting configuration
Lead spacing of 0.200" (5.08mm) nominal

All identified substitute parts meet these core electrical and mechanical requirements. Variations in physical dimensions, maximum current ratings, operating temperature ranges, and time-to-trip specifications do not preclude functional substitution when the primary electrical parameters align.

Parameter Comparison

Parameter	LVR005S-2	LVR005NS-2	0ZRE0005FF1C	0ZRE0005FF2C
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Bel Fuse Inc.	Bel Fuse Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Max	240V (265V Int)	240V (265V Int)	240V	240V
Current - Hold (Ih) (Max)	50 mA	50 mA	50 mA	50 mA
Current - Trip (It)	120 mA	120 mA	120 mA	120 mA
Resistance - Initial (Ri) (Min)	18.5 Ohms	18.5 Ohms	18.5 Ohms	18.5 Ohms
Resistance - Post Trip (R1) (Max)	65 Ohms	65 Ohms	65 Ohms	65 Ohms
Operating Temperature	-20°C ~ 85°C	-20°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Lead Spacing	0.200" (5.08mm)	0.200" (5.08mm)	0.201" (5.10mm)	0.201" (5.10mm)
Approval Agency	CQC, CSA, TUV, UL	CQC, CSA, TUV, UL	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

LVR005NS-2 (Littelfuse Inc., Active): This is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications and operating temperature range as the LVR005S-2. The primary difference is packaging format (Cut Tape versus bulk). This part is recommended as the primary replacement option due to manufacturer continuity and full specification alignment.

0ZRE0005FF1C and 0ZRE0005FF2C (Bel Fuse Inc., Active): Both Bel Fuse alternatives meet all critical electrical parameters and are certified to AEC-Q200 automotive standards. These parts feature an extended operating temperature range (-40°C to 85°C) compared to the original specification. Lead spacing tolerance is nominally equivalent (0.201" versus 0.200"). Both parts carry cURus and TUV certifications. The 0ZRE0005FF1C is supplied in box packaging, while 0ZRE0005FF2C is supplied in cut tape format.

Frequently Asked Questions (FAQ)

Q: Can LVR005NS-2 be used as a direct replacement for LVR005S-2?

A: Yes. The LVR005NS-2 is functionally equivalent with identical electrical ratings, hold current, trip current, and operating temperature range. The difference is packaging format. Both are Littelfuse PolySwitch® LVR series components.

Q: What are the key differences between Littelfuse and Bel Fuse alternatives?

A: The Littelfuse LVR005NS-2 maintains the original -20°C to 85°C operating temperature specification. The Bel Fuse 0ZRE series (0ZRE0005FF1C and 0ZRE0005FF2C) extend the lower operating temperature to -40°C. All three alternatives share identical hold current (50 mA), trip current (120 mA), and resistance specifications. Certification bodies differ: Littelfuse carries UL and CSA approvals, while Bel Fuse carries cURus certification.

Q: Does lead spacing difference affect PCB compatibility?

A: Lead spacing is 0.200" (5.08mm) for LVR005S-2 and LVR005NS-2, and 0.201" (5.10mm) for both Bel Fuse alternatives. This 0.01" tolerance difference is within standard PCB design tolerances for through-hole radial components and does not preclude mechanical or electrical compatibility.

Q: Which substitute should be selected for new designs?

A: For new designs, LVR005NS-2 is recommended as the primary choice due to manufacturer continuity with the original design. For applications requiring extended low-temperature operation below -20°C, the Bel Fuse 0ZRE0005FF1C or 0ZRE0005FF2C alternatives are suitable, with selection based on required packaging format (box or cut tape).

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed alternatives—LVR005NS-2, 0ZRE0005FF1C, and 0ZRE0005FF2C—are ROHS3 compliant and REACH unaffected.

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