V250LC40AP Equivalent & Substitute Parts

Part Overview

The V250LC40AP is a 390 V, 6.5 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc 20mm package. This component is designed for transient voltage protection in electronic circuits and is currently in active production status. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product category, enabling component interchangeability in circuit designs where the original part number may be unavailable or inventory constraints exist.

Key Parameters

Parameter	Value
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Maximum AC Volts	250 V
Maximum DC Volts	330 V
Varistor Voltage (Typ)	390 V
Current - Surge	6.5 kA
Energy	130 J
Number of Circuits	1
Mounting Type	Through Hole
Package / Case	Disc 20mm
Operating Temperature	-55°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the V250LC40AP are identified based on strict electrical and mechanical parameter equivalence within the Littelfuse varistor product line. The substitution criteria are:

Maximum AC Volts: 250 V
Maximum DC Volts: 330 V
Varistor Voltage (Typ): 390 V
Current - Surge: 6.5 kA
Energy: 130 J
Number of Circuits: 1
Mounting Type: Through Hole
Package / Case: Disc 20mm
Operating Temperature: -55°C ~ 85°C (TA)
RoHS Status: ROHS3 Compliant

Parts meeting all these parameters are classified as parametric equivalents and are suitable for direct substitution in applications where the V250LC40AP is specified.

Parameter Comparison

Parameter	V250LC40AP	V250LA40AP	V250LA40APX2855
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Series	LC	LA	LA
Maximum AC Volts	250 V	250 V	250 V
Maximum DC Volts	330 V	330 V	330 V
Varistor Voltage (Min)	351 V	351 V	351 V
Varistor Voltage (Typ)	390 V	390 V	390 V
Varistor Voltage (Max)	429 V	429 V	429 V
Current - Surge	6.5 kA	6.5 kA	6.5 kA
Energy	130 J	130 J	130 J
Number of Circuits	1	1	1
Capacitance @ Frequency	1000 pF @ 1 MHz	1000 pF @ 1 MHz	1000 pF @ 1 MHz
Operating Temperature	-55°C ~ 85°C (TA)	-55°C ~ 85°C (TA)	-55°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 20mm	Disc 20mm	Disc 20mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—V250LC40AP, V250LA40AP, and V250LA40APX2855—are active production components from Littelfuse Inc. with identical electrical specifications and mechanical form factors. Selection between these parts is based on availability and inventory status rather than technical performance differences.

The V250LC40AP (LC series) and substitute parts V250LA40AP and V250LA40APX2855 (LA series) maintain full parametric equivalence across all critical voltage, current, energy, and thermal specifications. All parts comply with ROHS3 and REACH requirements, ensuring regulatory compliance in applications requiring environmental standards adherence.

Component selection should prioritize availability and lead time requirements, as all three parts deliver identical circuit protection performance in 390 V, 6.5 kA transient suppression applications.

Frequently Asked Questions (FAQ)

Q: Can V250LA40AP and V250LA40APX2855 be used as direct replacements for V250LC40AP?

A: Yes. Both substitute parts meet all electrical and mechanical parameters specified for the V250LC40AP, including voltage ratings, surge current capacity, energy dissipation, package dimensions, and operating temperature range. Direct substitution is supported in circuit designs.

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

A: The series designation reflects internal Littelfuse product line categorization. Both LC and LA series parts specified here maintain identical electrical performance and physical packaging for the 390 V, 6.5 kA varistor specification.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent across all substitute options.

Q: What is the significance of the X2855 suffix in V250LA40APX2855?

A: The X2855 suffix is a Littelfuse internal designation that does not affect electrical or mechanical compatibility. The part maintains full parametric equivalence with V250LA40AP and V250LC40AP.

Q: Can these parts be mixed in the same circuit board assembly?

A: Yes. Since all parts are parametrically equivalent with identical electrical specifications and through-hole disc 20mm packaging, they can be used interchangeably within the same design without circuit modification or performance impact.

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