V320LA7 Equivalent & Substitute Parts

Part Overview

The V320LA7 is a 510 V, 1.2 kA disc varistor manufactured by Littelfuse, designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The varistor provides single-circuit protection with a 7mm disc package form factor and operates across the temperature range of -55°C to 85°C.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	510 V
Current - Surge	1.2 kA
Maximum AC Volts	320 V
Maximum DC Volts	420 V
Energy	25 J
Mounting Type	Through Hole
Package / Case	Disc 7mm
Operating Temperature	-55°C ~ 85°C
Number of Circuits	1
Capacitance @ 1 MHz	95 pF

Substitute Part Grouping Explanation

Substitution for the V320LA7 is based on electrical and mechanical parameter equivalence within the LA series varistor family. The following criteria determine valid substitutes:

Critical Parameters for Substitution:

Varistor voltage range (459 V minimum to 561 V maximum)
Surge current rating (1.2 kA)
Energy dissipation capacity (25 J)
Mounting configuration (Through Hole)
Physical package (Disc 7mm)
Operating temperature range (-55°C ~ 85°C)

All substitute parts maintain identical electrical specifications and mechanical compatibility with the original V320LA7 design. Substitutes are differentiated by product status and packaging configuration.

Parameter Comparison

Parameter	V320LA7	V320LA7P	V320LA7PX2855
Manufacturer	Littelfuse	Littelfuse Inc.	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)
Series	LA	LA	LA
Product Status	Obsolete	Active	Active
Varistor Voltage (Min)	459 V	459 V	459 V
Varistor Voltage (Typ)	510 V	510 V	510 V
Varistor Voltage (Max)	561 V	561 V	561 V
Current - Surge	1.2 kA	1.2 kA	1.2 kA
Maximum AC Volts	320 V	320 V	320 V
Maximum DC Volts	420 V	420 V	420 V
Energy	25 J	25 J	25 J
Number of Circuits	1	1	1
Capacitance @ 1 MHz	95 pF	95 pF	95 pF
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8533.40.4000	8533.40.4000	8533.40.4000

Engineering Selection Recommendations

V320LA7P is the direct manufacturer substitute for the obsolete V320LA7. Both parts are electrically and mechanically identical, with V320LA7P maintaining active product status and bulk packaging. This part is suitable for direct replacement in all applications where V320LA7 was originally specified.

V320LA7PX2855 is a parametric equivalent offering identical electrical performance and mechanical compatibility. This variant also maintains active product status and is available in bulk packaging. Selection between V320LA7P and V320LA7PX2855 depends on procurement requirements and supplier availability, as both meet all functional and compliance specifications.

Both substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical regulatory classifications (ECCN EAR99, HTSUS 8533.40.4000), ensuring compatibility with existing design documentation and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can V320LA7P be used as a direct replacement for V320LA7? A: Yes. V320LA7P is electrically and mechanically identical to V320LA7, with all critical parameters matching exactly. The primary difference is product status: V320LA7P is active while V320LA7 is obsolete.

Q: What is the difference between V320LA7P and V320LA7PX2855? A: Both parts are parametric equivalents with identical electrical specifications and mechanical form factors. The designation suffix indicates internal manufacturing or tracking variations. Both are suitable for the same applications.

Q: Are the substitute parts compatible with existing PCB designs? A: Yes. All substitute parts use the same through-hole disc 7mm package configuration, maintaining identical footprint and mounting compatibility with designs originally specified for V320LA7.

Q: Do the substitute parts meet the same compliance standards? A: Yes. V320LA7P and V320LA7PX2855 both maintain ROHS3 compliance, MSL Level 1 rating, and identical ECCN and HTSUS classifications as the original V320LA7.

Q: Which substitute should be selected for new designs? A: Either V320LA7P or V320LA7PX2855 is appropriate for new designs. Selection should be based on supplier availability and procurement lead times, as both parts are functionally equivalent and actively manufactured.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message