Littelfuse V575LA80B Varistor: Equivalent & Substitute Parts

Part Overview

The Littelfuse V575LA80B is a 889.5 V disc varistor rated for 6.5 kA surge current, designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts are available from the same manufacturer with current product status and full compliance certifications.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	889.5 V
Current - Surge	6.5 kA
Maximum AC Volts	575 V
Maximum DC Volts	730 V
Energy	220 J
Mounting Type	Through Hole
Package / Case	Disc 20mm
Operating Temperature Range	-55°C to 85°C
Capacitance @ 1 MHz	450 pF
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the V575LA80B is determined by strict equivalence across the following critical parameters:

Varistor voltage range: 819 V (Min) to 960 V (Max), with 889.5 V typical
Surge current rating: 6.5 kA
Energy dissipation: 220 J
Mounting configuration: Through hole, disc 20mm package
Operating temperature: -55°C to 85°C
Electrical ratings: 575 V AC maximum, 730 V DC maximum

All substitute parts listed maintain these specifications without deviation. Substitution is based on parametric equivalence only; packaging designations (suffix codes) indicate different tape-and-reel configurations or internal tracking codes and do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Series	Status	Varistor Voltage (Typ)	Surge Current	Energy	Package	Inventory
V575LA80B	LA	Obsolete	889.5 V	6.5 kA	220 J	Disc 20mm	897 Pcs
V575LA80BP	LA	Active	889.5 V	6.5 kA	220 J	Disc 20mm	1200 Pcs
V575LA80BPX10	LA	Active	889.5 V	6.5 kA	220 J	Disc 20mm	702 Pcs
V575LA80BPX1347	LA	Active	889.5 V	6.5 kA	220 J	Disc 20mm	832 Pcs
V575LA80BPX2855	LA	Active	889.5 V	6.5 kA	220 J	Disc 20mm	1179 Pcs
V575LC80BP	LC	Active	889.5 V	6.5 kA	220 J	Disc 20mm	1121 Pcs
V575LC80BPX10	LC	Active	889.5 V	6.5 kA	220 J	Disc 20mm	690 Pcs
V575LC80BPX2855	LC	Active	889.5 V	6.5 kA	220 J	Disc 20mm	703 Pcs

Engineering Selection Recommendations

All listed substitute parts are manufactured by Littelfuse and carry active product status with full ROHS3 compliance and REACH unaffected certification. The V575LA80BP represents the direct functional equivalent with highest current inventory availability (1200 units). Parts designated with suffix codes (BPX10, BPX1347, BPX2855) are parametrically identical and differ only in packaging configuration or internal tracking designation.

Series LC variants (V575LC80BP, V575LC80BPX10, V575LC80BPX2855) maintain all electrical and mechanical specifications of the LA series and are fully interchangeable for circuit applications. Selection between LA and LC series should be based on supply chain availability and internal procurement requirements, as no functional difference exists between series designations at the specified electrical ratings.

Frequently Asked Questions (FAQ)

Q: Can V575LA80BP directly replace V575LA80B in existing designs? A: Yes. The V575LA80BP maintains identical electrical specifications (889.5 V typical, 6.5 kA surge current, 220 J energy) and mechanical configuration (through-hole, disc 20mm package). The primary difference is product status: V575LA80B is obsolete while V575LA80BP is active.

Q: What is the difference between LA and LC series variants? A: Both LA and LC series share identical electrical ratings and mechanical dimensions for this voltage class. No functional difference exists between series designations at the specified parameters. Selection is based on availability and procurement preference.

Q: Do suffix codes (BPX10, BPX1347, BPX2855) affect electrical performance? A: No. Suffix codes indicate packaging configuration, tape-and-reel tracking, or internal manufacturing designation. All variants maintain the same electrical specifications and through-hole disc 20mm mechanical form factor.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and REACH unaffected certification status.

Q: Which substitute part should be selected for new designs? A: V575LA80BP is recommended as the primary choice due to active status and highest inventory availability. Alternative LA or LC series variants are functionally equivalent and may be selected based on supply chain considerations.

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