ROV10-820K-S Equivalent & Substitute Parts

Part Overview

The ROV10-820K-S is a 82 V, 2.5 kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component features a 10mm disc package and is rated for operating temperatures from -40°C to 85°C. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	82 V
Current - Surge	2.5 kA
Maximum DC Volts	65 V
Maximum AC Volts	50 V
Operating Temperature Range	-40°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 10mm
Number of Circuits	1

Substitute Part Grouping Explanation

Substitution eligibility for the ROV10-820K-S is determined by the following critical parameters:

Varistor Voltage (Typical): Must be 82 V to maintain circuit protection characteristics
Maximum DC Volts: Must be 65 V or greater
Maximum AC Volts: Must be 50 V or greater
Mounting Type: Must be Through Hole
Number of Circuits: Must be 1
RoHS Status: Must maintain ROHS3 Compliance

The substitute parts identified below meet these core electrical and mechanical requirements. Variations in surge current capacity, energy rating, and package dimensions are noted where they differ from the original specification.

Parameter Comparison

Parameter	ROV10-820K-S (Littelfuse)	B72210S0500K101 (EPCOS - TDK)	B72210S0500K151 (EPCOS - TDK)	ERZ-V10D820 (Panasonic)
Manufacturer	Littelfuse Inc.	EPCOS - TDK Electronics	EPCOS - TDK Electronics	Panasonic Electronic Components
Varistor Voltage (Min)	73.8 V	73.8 V	73.8 V	74 V
Varistor Voltage (Typ)	82 V	82 V	82 V	82 V
Varistor Voltage (Max)	90.2 V	90.2 V	90.2 V	90 V
Current - Surge	2.5 kA	2.5 kA	2.5 kA	4.6 kA
Maximum DC Volts	65 V	65 V	65 V	65 V
Maximum AC Volts	50 V	50 V	50 V	50 V
Operating Temperature Range	-40°C to 85°C	-40°C to 105°C	-40°C to 105°C	-40°C to 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 10mm	Disc 10mm	Disc 10mm	Disc 11.5mm
Number of Circuits	1	1	1	1
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts maintain active product status and ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete ROV10-820K-S.

B72210S0500K101 and B72210S0500K151 (EPCOS - TDK Electronics) are electrically identical to the original part with matching surge current capacity of 2.5 kA and identical voltage ratings. These parts differ only in packaging format (Bulk versus Cut Tape) and offer extended operating temperature range to 105°C. The 10mm disc package maintains mechanical compatibility with existing PCB layouts.

ERZ-V10D820 (Panasonic Electronic Components) provides enhanced surge current capacity at 4.6 kA while maintaining the same 82 V varistor voltage and voltage ratings. The package dimension increases to 11.5mm, requiring verification of available PCB space. Operating temperature range matches the original specification at -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can B72210S0500K101 and B72210S0500K151 be used interchangeably with ROV10-820K-S?

A: Yes. Both parts share identical electrical specifications including varistor voltage (82 V typical), surge current (2.5 kA), and voltage ratings. The difference is packaging format: B72210S0500K101 is supplied in Bulk, while B72210S0500K151 is supplied in Cut Tape. Both maintain the 10mm disc package and are suitable for direct substitution.

Q: What is the primary difference between the EPCOS parts and the Panasonic ERZ-V10D820?

A: The ERZ-V10D820 provides higher surge current capacity at 4.6 kA compared to 2.5 kA for the EPCOS alternatives. The package dimension increases from 10mm to 11.5mm. All other electrical parameters, including varistor voltage and voltage ratings, remain equivalent.

Q: Does the 11.5mm package of the ERZ-V10D820 affect PCB compatibility?

A: The larger package dimension must be verified against available PCB space and mounting hole spacing. If the original design uses a 10mm footprint, the 11.5mm package may require layout modification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original ROV10-820K-S.

Q: Which substitute part offers the best long-term availability?

A: All three substitute parts maintain active product status. Current inventory levels show B72210S0500K101 with 47,583 units in stock, B72210S0500K151 with 3,892 units, and ERZ-V10D820 with 14,406 units available.

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