V82ZS2 Equivalent & Substitute Parts

Part Overview

The V82ZS2 is an 82 V, 1.2 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc 7mm package. This component is classified as obsolete, though 938 units remain in stock as new original inventory. The V82ZS2 series varistor provides transient voltage suppression across a single circuit with 4J energy rating and operates across the temperature range of -55°C to 85°C.

Due to the obsolete product status of the V82ZS2, equivalent substitute parts from active product lines are necessary for new designs and long-term supply chain continuity. Direct packaging alternatives and parametric equivalents are available within the Littelfuse ZS and ZT series.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	82 V
Varistor Voltage Range (Min - Max)	73.8 V - 90.2 V
Current - Surge	1.2 kA
Energy Rating	4 J
Maximum AC Volts	50 V
Maximum DC Volts	68 V
Number of Circuits	1
Mounting Type	Through Hole
Package / Case	Disc 7mm
Operating Temperature Range	-55°C to 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the V82ZS2 is determined by strict equivalence across the following critical parameters:

Varistor voltage rating (typical 82 V with tolerance range 73.8 V - 90.2 V)
Surge current capacity (1.2 kA)
Energy dissipation (4 J)
Maximum AC and DC voltage ratings (50 V AC, 68 V DC)
Single circuit configuration
Through-hole mounting in disc 7mm package
Operating temperature range (-55°C to 85°C)
RoHS3 compliance

Substitute parts are grouped into two categories:

Direct Substitute (Packaging Variant): V82ZS2P maintains identical electrical specifications and physical form factor but differs only in packaging format (Tape & Reel instead of bulk).

Parametric Equivalents (Series Variants): V82ZT2P and V82ZT2PX2855 belong to the ZT series rather than ZS series but maintain all critical electrical parameters and physical dimensions. These parts are functionally interchangeable at the circuit level.

Parameter Comparison

Parameter	V82ZS2 (Main)	V82ZS2P (Direct)	V82ZT2P (Parametric)	V82ZT2PX2855 (Parametric)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Varistor Voltage (Typ)	82 V	82 V	82 V	82 V
Varistor Voltage (Min - Max)	73.8 V - 90.2 V	73.8 V - 90.2 V	73.8 V - 90.2 V	73.8 V - 90.2 V
Current - Surge	1.2 kA	1.2 kA	1.2 kA	1.2 kA
Energy	4 J	4 J	4 J	4 J
Maximum AC Volts	50 V	50 V	50 V	50 V
Maximum DC Volts	68 V	68 V	68 V	68 V
Number of Circuits	1	1	1	1
Capacitance @ 1 MHz	910 pF	700 pF	910 pF	910 pF
Operating Temperature	-55°C to 85°C	-55°C to 85°C	-55°C to 85°C	-55°C to 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm	Disc 7mm
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For New Designs: V82ZS2P is the primary recommendation. It maintains identical electrical and mechanical specifications to the V82ZS2 while offering active product status and REACH compliance. The Tape & Reel packaging format is standard for automated assembly processes.

For Parametric Equivalence: V82ZT2P and V82ZT2PX2855 are functionally equivalent alternatives. Both maintain all critical electrical parameters and physical form factor. The ZT series designation indicates a different product line within Littelfuse, but electrical performance is identical. V82ZT2P offers higher inventory availability (938 units) compared to V82ZT2PX2855 (819 units).

Capacitance Consideration: V82ZS2P exhibits lower capacitance (700 pF @ 1 MHz) compared to the original V82ZS2 (910 pF @ 1 MHz). In applications where capacitive loading is a design constraint, V82ZT2P or V82ZT2PX2855 maintain the original 910 pF specification.

All substitute parts carry ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can V82ZS2P be used as a direct replacement for V82ZS2?

A: Yes. V82ZS2P is a direct substitute with identical electrical specifications and physical dimensions. The only difference is packaging format (Tape & Reel versus bulk). Both are 82 V, 1.2 kA varistors in disc 7mm through-hole packages.

Q: What is the difference between V82ZS2P and V82ZT2P?

A: Both parts are electrically equivalent with identical varistor voltage (82 V), surge current (1.2 kA), and energy rating (4 J). The primary difference is series designation (ZS versus ZT) and capacitance specification. V82ZT2P maintains 910 pF capacitance at 1 MHz, while V82ZS2P is rated at 700 pF. Both are active products with full compliance certifications.

Q: Why is the V82ZS2 marked as obsolete?

A: The V82ZS2 has been discontinued by Littelfuse Inc. Equivalent active products (V82ZS2P, V82ZT2P, V82ZT2PX2855) are available to support existing inventory and new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. V82ZS2P, V82ZT2P, and V82ZT2PX2855 are all ROHS3 compliant with MSL 1 rating, meeting standard environmental and regulatory requirements.

Q: Which substitute part should I select for new production?

A: V82ZS2P is the recommended choice for new designs. It provides active product status, identical specifications to the original V82ZS2, and standard Tape & Reel packaging for automated assembly. If capacitance specification is critical to your circuit design, V82ZT2P offers the same 910 pF rating as the original part.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, within the constraints of your specific circuit requirements. All substitute parts maintain the same electrical performance envelope (82 V typical, 1.2 kA surge, 4 J energy) and physical form factor. Verify capacitance requirements if your design is sensitive to this parameter.

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