V82ZT4 Equivalent & Substitute Parts

Part Overview

The V82ZT4 is an 82 V, 2.5 kA transient voltage suppressor (TVS) varistor manufactured by Littelfuse Inc., designed for through-hole disc mounting in 10mm packages. This component is classified as obsolete, though functionally equivalent active alternatives are available. Identifying substitute parts ensures design continuity and maintains supply chain reliability for applications requiring 82 V varistor protection with 2.5 kA surge current capacity.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	82 V
Current - Surge	2.5 kA
Maximum DC Volts	68 V
Maximum AC Volts	50 V
Energy	8 J
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 10mm
Capacitance @ 1 MHz	1485 pF
Number of Circuits	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the V82ZT4 are qualified based on identical electrical and mechanical parameters: varistor voltage range (73.8 V minimum to 90.2 V maximum), surge current capacity (2.5 kA), energy rating (8 J), operating temperature range (-55°C to 85°C), through-hole mounting configuration, and 10mm disc package form factor. All substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating.

Substitutes are differentiated by series designation (ZT, ZS, ZU) and packaging format (bulk, cut tape, or tape & reel). The V82ZT4P represents the direct successor with identical electrical specifications in tape & reel packaging. The V82ZS4P and V82ZU4P series provide parametric equivalence across alternative series lines. Tape & reel variants with X2855 designation (V82ZS4PX2855, V82ZT4PX2855, V82ZU4PX2855) offer the same electrical performance in reel packaging configurations.

Parameter Comparison

Part Number	Manufacturer	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Max DC Volts	Energy	Inventory (Pcs)
V82ZT4	Littelfuse Inc.	ZT	Bulk	Obsolete	82 V	2.5 kA	68 V	8 J	900
V82ZT4P	Littelfuse Inc.	ZT	Tape & Reel (TR)	Active	82 V	2.5 kA	68 V	8 J	1151
V82ZS4P	Littelfuse Inc.	ZS	Cut Tape (CT)	Active	82 V	2.5 kA	68 V	8 J	3793
V82ZS4PX2855	Littelfuse Inc.	ZS	Tape & Reel (TR)	Active	82 V	2.5 kA	68 V	8 J	882
V82ZT4PX2855	Littelfuse Inc.	ZT	Tape & Reel (TR)	Active	82 V	2.5 kA	68 V	8 J	884
V82ZU4P	Littelfuse	ZU	Tape & Reel (TR)	Active	82 V	2.5 kA	68 V	8 J	1062
V82ZU4PX2855	Littelfuse Inc.	ZU	Tape & Reel (TR)	Active	82 V	2.5 kA	68 V	8 J	919

Engineering Selection Recommendations

All substitute parts listed maintain active product status with Littelfuse Inc., ensuring ongoing manufacturer support and supply availability. The V82ZT4P is the primary direct substitute, offering identical electrical specifications with active status and higher inventory availability (1151 pcs). For applications requiring cut tape packaging, V82ZS4P provides the highest inventory level (3793 pcs) with active status. Tape & reel variants (V82ZT4PX2855, V82ZS4PX2855, V82ZU4PX2855) are suitable for automated assembly processes and maintain equivalent electrical performance across all series designations. All alternatives comply with ROHS3 requirements and maintain MSL Level 1 moisture sensitivity rating, supporting equivalent reliability in production environments.

Frequently Asked Questions (FAQ)

Q: Can V82ZT4P directly replace V82ZT4 in existing designs? A: Yes. V82ZT4P maintains identical electrical parameters (82 V typical varistor voltage, 2.5 kA surge current, 8 J energy) and through-hole disc 10mm mounting configuration. The primary difference is packaging format (tape & reel versus bulk) and active product status.

Q: What is the difference between V82ZS4P and V82ZU4P? A: Both parts are parametric equivalents with identical electrical specifications and through-hole disc 10mm mounting. The difference is series designation (ZS versus ZU). Selection between these parts depends on packaging preference and inventory availability rather than electrical performance.

Q: Are X2855 variants electrically equivalent to non-X2855 parts? A: Yes. The X2855 designation indicates reel packaging configuration. Electrical parameters, temperature range, and surge current capacity remain identical across V82ZS4P, V82ZS4PX2855, V82ZT4P, V82ZT4PX2855, V82ZU4P, and V82ZU4PX2855.

Q: Which substitute offers the best inventory availability? A: V82ZS4P in cut tape packaging provides the highest inventory level at 3793 pcs. For tape & reel formats, V82ZU4P offers 1062 pcs and V82ZT4PX2855 offers 884 pcs.

Q: Do all substitutes meet the same compliance requirements? A: Yes. All substitute parts are ROHS3 compliant with MSL Level 1 moisture sensitivity rating, matching the original V82ZT4 specifications.

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