ROV10-151K Equivalent & Substitute Parts

Part Overview

The ROV10-151K is a 150V 2.5kA disc varistor manufactured by Littelfuse, designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The varistor provides overvoltage protection with a 10mm disc form factor and operates across a temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	150 V
Current - Surge	2.5 kA
Maximum DC Volts	125 V
Maximum AC Volts	95 V
Number of Circuits	1
Mounting Type	Through Hole
Package / Case	Disc 10mm
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ROV10-151K are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Varistor voltage rating: 135V minimum to 165V maximum (nominal 150V)
Surge current capacity: minimum 2.5 kA
Maximum DC voltage: 125V or higher
Maximum AC voltage: 95V or higher
Single circuit configuration
Through-hole mounting
Disc form factor (10mm or 11.5mm)
Operating temperature range: -40°C minimum to 85°C minimum

Substitute Parts Identified:

V150ZA4P (Littelfuse Inc.) - Active product status, meets all primary criteria with extended operating temperature range to -55°C
B72210S0950K551 (EPCOS - TDK Electronics) - Active product status, meets all primary criteria with extended operating temperature range to 105°C
ERZ-V10D151 (Panasonic Electronic Components) - Active product status, exceeds surge current specification at 4.6 kA with 11.5mm disc package

Parameter Comparison

Parameter	ROV10-151K	V150ZA4P	B72210S0950K551	ERZ-V10D151
Manufacturer	Littelfuse	Littelfuse Inc.	EPCOS - TDK Electronics	Panasonic Electronic Components
Product Status	Obsolete	Active	Active	Active
Varistor Voltage (Min)	135 V	135 V	135 V	135 V
Varistor Voltage (Typ)	150 V	150 V	150 V	150 V
Varistor Voltage (Max)	165 V	165 V	165 V	165 V
Current - Surge	2.5 kA	2.5 kA	2.5 kA	4.6 kA
Maximum DC Volts	125 V	127 V	125 V	125 V
Maximum AC Volts	95 V	95 V	95 V	95 V
Number of Circuits	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 10mm	Disc 10mm	Disc 10mm	Disc 11.5mm
Operating Temperature	-40°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts maintain active product status and full ROHS3 compliance, ensuring long-term availability and regulatory conformance.

V150ZA4P provides direct form factor compatibility with the original ROV10-151K in a 10mm disc package. This Littelfuse part extends the minimum operating temperature to -55°C and is available in bulk packaging.

B72210S0950K551 offers the widest operating temperature range, extending to 105°C maximum, and is supplied in tape and reel format suitable for automated assembly processes. The EPCOS-TDK Electronics manufacturing source provides an alternative supply chain.

ERZ-V10D151 from Panasonic exceeds the surge current specification at 4.6 kA, providing additional margin for transient protection. The 11.5mm disc package represents a minor dimensional variation from the original 10mm specification. This part is available in bulk packaging with the highest inventory level.

Frequently Asked Questions (FAQ)

Q: Can V150ZA4P directly replace ROV10-151K in existing designs? A: Yes. V150ZA4P meets all electrical parameters and maintains the 10mm disc form factor. Both are Littelfuse products with identical varistor voltage ratings and surge current specifications.

Q: What is the primary difference between B72210S0950K551 and the original part? A: B72210S0950K551 extends the maximum operating temperature to 105°C compared to 85°C for ROV10-151K. All other electrical specifications remain equivalent. This part is supplied in tape and reel packaging rather than bulk.

Q: Why does ERZ-V10D151 have a higher surge current rating? A: ERZ-V10D151 is rated for 4.6 kA surge current versus 2.5 kA for ROV10-151K. This represents a design enhancement providing additional transient protection margin. The 11.5mm disc package is slightly larger than the original 10mm specification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. V150ZA4P, B72210S0950K551, and ERZ-V10D151 are all ROHS3 compliant with REACH unaffected status, matching the regulatory compliance of ROV10-151K.

Q: Which substitute part should be selected for high-temperature applications? A: B72210S0950K551 supports operating temperatures up to 105°C, making it suitable for applications requiring extended thermal performance beyond the standard -40°C to 85°C range.

Q: Does package format affect substitution compatibility? A: V150ZA4P and B72210S0950K551 maintain the 10mm disc form factor for direct PCB compatibility. ERZ-V10D151 uses an 11.5mm disc package, requiring verification of available board space. Packaging format (bulk versus tape and reel) affects procurement and assembly processes but not electrical performance.

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