ROV10-180M-S Equivalent & Substitute Parts

Part Overview

The ROV10-180M-S is a 18 V, 500 A Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc package (10mm). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Varistors in this category provide transient voltage suppression across a single circuit, with applications in power supply protection, signal line conditioning, and industrial control systems. The obsolete status of the ROV10-180M-S requires identification of active alternative components that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	18 V
Current - Surge	500 A
Maximum AC Volts	11 V
Maximum DC Volts	14 V
Energy	2.4 J
Operating Temperature Range	-40°C ~ 85°C
Package / Case	Disc 10mm
Mounting Type	Through Hole
Number of Circuits	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ROV10-180M-S is determined by the following critical parameters:

Varistor Voltage (Typical): Must be 18 V
Maximum AC Volts: Must be 11 V
Maximum DC Volts: Must be 14 V
Number of Circuits: Must be 1
Mounting Type: Must be Through Hole
Package Category: Disc form factor (10mm or 11.5mm acceptable)
RoHS Compliance: ROHS3 Compliant

The identified substitute parts meet these core electrical and mechanical requirements. Variations in surge current capacity (500 A vs. 1 kA), energy rating (1.7 J to 2.6 J), and package diameter (10mm vs. 11.5mm) are within acceptable tolerance ranges for this component category and do not preclude substitution in standard applications.

Parameter Comparison

Parameter	ROV10-180M-S (Littelfuse)	B72210S0110K101 (EPCOS - TDK)	ERZ-V10D180 (Panasonic)
Varistor Voltage (Min)	14.4 V	16.2 V	16 V
Varistor Voltage (Typ)	18 V	18 V	18 V
Varistor Voltage (Max)	21.6 V	19.8 V	20 V
Maximum AC Volts	11 V	11 V	11 V
Maximum DC Volts	14 V	14 V	14 V
Current - Surge	500 A	500 A	1 kA
Energy	2.4 J	1.7 J	2.6 J
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
Package / Case	Disc 10mm	Disc 10mm	Disc 11.5mm
Mounting Type	Through Hole	Through Hole	Through Hole
Number of Circuits	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are classified as active products with current manufacturing status, providing long-term availability compared to the obsolete ROV10-180M-S.

B72210S0110K101 (EPCOS - TDK Electronics): This part maintains identical surge current capacity (500 A) and package diameter (10mm) to the original component. The varistor voltage tolerance range (16.2 V to 19.8 V) is tighter than the original specification. Operating temperature range extends to 105°C, providing enhanced thermal margin. This part is suitable for direct replacement in applications where the original 10mm package footprint is required.

ERZ-V10D180 (Panasonic Electronic Components): This part features increased surge current capacity (1 kA) and higher energy rating (2.6 J), offering enhanced transient suppression capability. The package diameter is 11.5mm, requiring PCB layout verification for mechanical fit. Operating temperature range matches the original specification (-40°C to 85°C). This part is suitable for applications where increased surge current handling is beneficial or where the slightly larger package diameter is accommodated.

Both parts maintain ROHS3 compliance and identical electrical operating parameters (11 V AC maximum, 14 V DC maximum, 18 V typical varistor voltage).

Frequently Asked Questions (FAQ)

Q: Can B72210S0110K101 be used as a direct replacement for ROV10-180M-S?

A: Yes. Both components share identical maximum AC/DC voltage ratings, varistor voltage (18 V typical), surge current capacity (500 A), and package diameter (10mm). The tighter varistor voltage tolerance of the EPCOS part (16.2 V to 19.8 V vs. 14.4 V to 21.6 V) represents improved consistency. The extended operating temperature range (-40°C to 105°C) provides additional thermal margin.

Q: Can ERZ-V10D180 be used as a direct replacement for ROV10-180M-S?

A: Yes, with package diameter verification. Both components share identical maximum AC/DC voltage ratings and varistor voltage (18 V typical). The ERZ-V10D180 features increased surge current capacity (1 kA vs. 500 A) and higher energy rating (2.6 J vs. 2.4 J). The package diameter is 11.5mm compared to 10mm, requiring confirmation that the PCB layout accommodates the larger disc size.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution is determined by: varistor voltage (18 V typical), maximum AC voltage (11 V), maximum DC voltage (14 V), number of circuits (1), and mounting type (through hole). Surge current capacity and energy rating may vary within acceptable ranges for this component category.

Q: Are all substitute parts RoHS compliant?

A: Yes. The ROV10-180M-S and both substitute parts (B72210S0110K101 and ERZ-V10D180) are ROHS3 compliant.

Q: What is the difference in operating temperature ranges?

A: The ROV10-180M-S and ERZ-V10D180 operate from -40°C to 85°C. The B72210S0110K101 extends to 105°C maximum, providing enhanced thermal performance in high-temperature environments.

Q: Does package size affect electrical performance?

A: Package size (10mm vs. 11.5mm disc diameter) is a mechanical consideration for PCB layout and does not affect electrical performance. Both sizes maintain the same electrical specifications for varistor voltage, surge current handling, and voltage suppression characteristics.

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