Littelfuse V82ZA2P Varistor: Equivalent & Substitute Parts

Part Overview

The Littelfuse V82ZA2P is an 82 V, 1.2 kA transient voltage suppressor varistor in a 7mm disc through-hole package. This component is designed for overvoltage protection in electronic circuits and is currently in active production status. Substitute parts may be required due to inventory constraints, regional availability, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within defined parameters.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	82 V
Current - Surge	1.2 kA
Maximum AC Volts	50 V
Maximum DC Volts	68 V
Energy	4 J
Operating Temperature Range	-55°C to 85°C
Package / Case	Disc 7mm
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the V82ZA2P is determined by the following critical parameters:

Varistor voltage rating (minimum 73.8 V, typical 82 V, maximum 90.2 V)
Surge current capacity (minimum 1.2 kA)
Maximum DC voltage rating (minimum 65 V)
Through-hole mounting configuration
Disc package form factor (7mm or compatible)
Single circuit configuration
RoHS3 compliance

The substitute parts listed below meet or exceed these core electrical and mechanical requirements, ensuring functional compatibility in applications designed for the V82ZA2P.

Parameter Comparison

Parameter	V82ZA2P (Littelfuse)	B72207S0500K101 (EPCOS - TDK)	ERZ-V07D820 (Panasonic)
Manufacturer	Littelfuse	EPCOS - TDK Electronics	Panasonic Electronic Components
Varistor Voltage (Min)	73.8 V	73.8 V	74 V
Varistor Voltage (Typ)	82 V	82 V	82 V
Varistor Voltage (Max)	90.2 V	90.2 V	90 V
Current - Surge	1.2 kA	1.2 kA	1.75 kA
Maximum AC Volts	50 V	50 V	50 V
Maximum DC Volts	68 V	65 V	65 V
Energy	4 J	4.2 J	7 J
Number of Circuits	1	1	1
Operating Temperature Range	-55°C to 85°C	-40°C to 105°C	-40°C to 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 8.5mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts listed are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

The B72207S0500K101 (EPCOS - TDK Electronics) provides electrical equivalence with identical varistor voltage and surge current ratings. The primary consideration is the maximum DC voltage specification of 65 V versus the original 68 V; this difference is acceptable in applications where the circuit design margin accommodates this variance.

The ERZ-V07D820 (Panasonic Electronic Components) offers enhanced surge current capacity (1.75 kA) and energy absorption (7 J), providing additional protection margin. The package form factor is 8.5mm disc versus 7mm, which may require PCB layout verification for mechanical fit. The maximum DC voltage is 65 V, consistent with the EPCOS alternative.

Selection between these substitutes should be based on PCB layout constraints, available inventory, and whether the enhanced surge current and energy ratings of the Panasonic part provide beneficial design margin for the specific application.

Frequently Asked Questions (FAQ)

Q: Can the B72207S0500K101 be used as a direct replacement for the V82ZA2P?

A: Yes. Both parts share identical varistor voltage ratings (82 V typical) and surge current capacity (1.2 kA). The maximum DC voltage specification differs by 3 V (65 V versus 68 V); compatibility depends on circuit design margins and operating conditions.

Q: What is the primary difference between the ERZ-V07D820 and the V82ZA2P?

A: The ERZ-V07D820 has a higher surge current rating (1.75 kA versus 1.2 kA) and greater energy absorption (7 J versus 4 J). The package diameter is 8.5mm instead of 7mm, requiring verification of PCB footprint compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The V82ZA2P, B72207S0500K101, and ERZ-V07D820 are all ROHS3 compliant and REACH unaffected.

Q: Does the operating temperature range affect substitution eligibility?

A: The V82ZA2P operates from -55°C to 85°C. The B72207S0500K101 extends to -40°C to 105°C, and the ERZ-V07D820 operates from -40°C to 85°C. For applications requiring the full -55°C lower limit, the V82ZA2P is the only option among these three parts.

Q: Can the Panasonic ERZ-V07D820 be used in a circuit designed for the Littelfuse V82ZA2P?

A: Electrical compatibility is confirmed through matching varistor voltage and exceeding surge current requirements. Mechanical compatibility requires verification of the 8.5mm disc package against the PCB footprint designed for 7mm diameter.

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