V320LS7 Equivalent & Substitute Parts

Part Overview

The V320LS7 is a 510 V, 1.2 kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole disc 7mm package configuration. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

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 Range	-55°C to 85°C
Capacitance @ 1 MHz	65 pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the V320LS7 is determined by strict equivalence across all electrical parameters: varistor voltage range (459 V minimum to 561 V maximum), surge current rating (1.2 kA), energy dissipation (25 J), and mechanical form factor (through-hole disc 7mm). All substitute parts listed maintain these specifications without deviation. Packaging format differences (Tape & Reel, Cut Tape) do not affect electrical or mechanical compatibility and represent procurement variations only. Series designation changes (LS, LT, LU) reflect internal Littelfuse manufacturing classifications and do not alter functional performance.

Parameter Comparison

Part Number	Manufacturer	Series	Varistor Voltage (Typ)	Surge Current	Max AC / DC Volts	Energy	Package	Packaging Format	Product Status	Inventory (Pcs)
V320LS7	Littelfuse Inc.	LS	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Bulk	Obsolete	1149
V320LS7P	Littelfuse Inc.	LS	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	877
V320LS7PX2855	Littelfuse Inc.	LS	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	999
V320LT7P	Littelfuse	LT	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Cut Tape (CT)	Active	2002
V320LT7PX1347	Littelfuse Inc.	LT	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	785
V320LT7PX2855	Littelfuse Inc.	LT	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	904
V320LU7P	Littelfuse Inc.	LU	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	1064
V320LU7PX2855	Littelfuse Inc.	LU	510 V	1.2 kA	320 V / 420 V	25 J	Disc 7mm	Tape & Reel (TR)	Active	819

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, providing regulatory continuity for new designs and production. The V320LS7P offers direct series continuity with active status and Tape & Reel packaging suitable for automated assembly. The V320LT7P variant provides the highest current inventory (2002 units) in Cut Tape format for manual placement applications. Series LU variants (V320LU7P, V320LU7PX2855) maintain full electrical equivalence with alternative packaging configurations. Selection between Tape & Reel and Cut Tape formats depends on assembly methodology; electrical performance remains identical across all variants.

Frequently Asked Questions (FAQ)

Q: Can V320LS7 be directly replaced with V320LS7P? A: Yes. V320LS7P is a direct substitute with identical electrical specifications (510 V typical, 1.2 kA surge current, 25 J energy) and mechanical form factor (disc 7mm through-hole). The only difference is packaging format (Tape & Reel versus bulk), which does not affect circuit performance.

Q: What is the difference between LS, LT, and LU series designations? A: Series designations (LS, LT, LU) represent internal Littelfuse manufacturing classifications. All variants maintain identical electrical parameters and mechanical specifications. Series differences do not affect functional compatibility in circuit applications.

Q: Are packaging format differences (Tape & Reel, Cut Tape) electrically significant? A: No. Packaging format differences address procurement and assembly logistics only. Electrical and mechanical specifications remain unchanged. Tape & Reel format suits automated pick-and-place assembly; Cut Tape suits manual placement.

Q: Is the V320LS7 still available for new designs? A: The V320LS7 is classified as obsolete. Active substitute parts (V320LS7P, V320LT7P, V320LU7P, and their packaging variants) are recommended for new designs to ensure long-term supply continuity and support.

Q: Do all substitute parts meet the same compliance standards? A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence with the original V320LS7 specification.

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