Littelfuse V625LC40AP Varistor - Equivalent & Substitute Parts

Part Overview

The Littelfuse V625LC40AP is a 1 kV metal oxide varistor (MOV) designed for transient voltage suppression applications. This through-hole disc component rated at 4.5 kA surge current provides protection in circuits requiring voltage clamping at approximately 1 kV nominal varistor voltage. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), making it suitable for industrial and commercial electronic equipment requiring reliable overvoltage protection.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the critical suppression parameters, allowing for component interchangeability in circuit designs without performance degradation.

Key Parameters

Parameter	Value	Unit
Maximum AC Voltage	625	V
Maximum DC Voltage	825	V
Varistor Voltage (Nominal)	1	kV
Varistor Voltage Range	900 - 1100	V
Surge Current Rating	4.5	kA
Energy Absorption	125	J
Operating Temperature Range	-55 to +85	°C
Mounting Type	Through Hole	—
Package Type	Disc 14mm	—
Number of Circuits	1	—
Capacitance @ 1 MHz	210	pF

Substitute Part Grouping Explanation

Substitution of the V625LC40AP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Varistor voltage rating (nominal 1 kV with tolerance band 900 - 1100 V)
Surge current capacity (4.5 kA minimum)
Energy absorption capability (125 J)
Maximum AC and DC voltage ratings (625 V AC / 825 V DC)
Physical form factor (through-hole disc 14mm package)
Single-circuit configuration
Operating temperature range (-55°C to +85°C)
Compliance certifications (RoHS3, REACH Unaffected)

The V625LA40AP from Littelfuse meets all specified parameters and is classified as a parametric equivalent. Both parts share identical electrical performance characteristics and mechanical compatibility, differing only in internal series designation (LC versus LA).

Parameter Comparison

Parameter	V625LC40AP (Main)	V625LA40AP (Substitute)	Match Status
Manufacturer	Littelfuse Inc.	Littelfuse	Equivalent
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Equivalent
Maximum AC Volts	625 V	625 V	Identical
Maximum DC Volts	825 V	825 V	Identical
Varistor Voltage (Min)	900 V	900 V	Identical
Varistor Voltage (Typ)	1 kV	1 kV	Identical
Varistor Voltage (Max)	1.1 kV	1.1 kV	Identical
Current - Surge	4.5 kA	4.5 kA	Identical
Energy	125 J	125 J	Identical
Number of Circuits	1	1	Identical
Capacitance @ 1 MHz	210 pF	210 pF	Identical
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Disc 14mm	Disc 14mm	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the V625LC40AP and V625LA40AP are active production components from Littelfuse with full regulatory compliance. Selection between these parts is based on availability and supply chain considerations rather than electrical or mechanical performance differences.

The V625LC40AP (LC series) carries 1038 units in current inventory stock. The V625LA40AP (LA series) carries 1409 units in current inventory stock. Both parts maintain identical electrical specifications, thermal performance, and compliance certifications (RoHS3, REACH Unaffected, EAR99 ECCN classification).

For applications requiring the 1 kV / 4.5 kA varistor specification in a 14mm through-hole disc package, either part provides equivalent circuit protection performance. Component selection should prioritize supply availability and lead time requirements.

Frequently Asked Questions (FAQ)

Q: Can V625LA40AP be used as a direct replacement for V625LC40AP in existing circuit designs?

A: Yes. Both parts are parametric equivalents with identical electrical ratings, surge current capacity, energy absorption, operating temperature range, and physical package dimensions. Direct substitution in PCB layouts and circuit schematics is supported without design modification.

Q: What is the difference between the LC and LA series designations?

A: The LC and LA designations represent different internal series within Littelfuse's varistor product line. Both series share identical electrical performance and mechanical specifications for this 1 kV / 4.5 kA rating. The series designation does not affect circuit compatibility or performance characteristics.

Q: Are both parts suitable for high-temperature applications?

A: Both the V625LC40AP and V625LA40AP are rated for continuous operation across the -55°C to +85°C temperature range. This specification applies equally to both parts and supports industrial and commercial equipment applications within this thermal envelope.

Q: What compliance certifications apply to both substitute parts?

A: Both parts carry RoHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification. Moisture sensitivity level is rated at MSL 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

Q: Can these varistors be used in AC or DC circuits?

A: Both parts are rated for maximum AC voltage of 625 V and maximum DC voltage of 825 V. The varistor voltage specification of 1 kV nominal applies to both AC and DC transient suppression applications within these voltage limits.

Q: What is the physical footprint for PCB layout planning?

A: Both parts use a through-hole disc 14mm package form factor. PCB layout and component spacing should accommodate a 14mm diameter disc component with through-hole lead configuration.

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