ROV07-151K-S-2 Equivalent & Substitute Parts

Part Overview

The ROV07-151K-S-2 is a 150 V, 1.2 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This part is classified as obsolete, which necessitates identification of active equivalent alternatives that maintain electrical and mechanical compatibility. Substitute parts must match the core voltage rating, surge current capacity, and physical form factor to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	150 V
Current - Surge	1.2 kA
Maximum DC Volts	125 V
Maximum AC Volts	95 V
Package / Case	Disc 7mm
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Varistor Voltage (Typical): Must be 150 V to maintain voltage suppression threshold
Current - Surge: Must be ≥ 1.2 kA to handle transient events
Maximum DC Volts: Must be ≥ 125 V for DC circuit compatibility
Maximum AC Volts: Must be ≥ 95 V for AC circuit compatibility
Package / Case: Physical form factor (7mm or 8.5mm disc) determines PCB fit
Mounting Type: Through hole configuration required for existing designs
RoHS Compliance: ROHS3 compliance required for regulatory alignment

Substitute parts are grouped by packaging configuration and surge current rating. Parts with identical electrical specifications but different packaging (tape & reel vs. bulk) are direct functional equivalents. Parts with enhanced surge current capacity (1.75 kA) provide improved transient protection margins.

Parameter Comparison

Parameter	ROV07-151K-S-2	V150ZS1P	MOV-07D151K	MOV-07D151KTR	VDRS07H095BSE	ERZ-V07D151
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Bourns Inc.	Bourns Inc.	Vishay Beyschlag	Panasonic
Product Status	Obsolete	Active	Active	Active	Active	Active
Varistor Voltage (Typ)	150 V	150 V	150 V	150 V	150 V	150 V
Current - Surge	1.2 kA	1.2 kA	1.2 kA	1.2 kA	1.2 kA	1.75 kA
Maximum DC Volts	125 V	127 V	125 V	125 V	125 V	125 V
Maximum AC Volts	95 V	95 V	95 V	95 V	95 V	95 V
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm	Disc 7mm	Disc 9mm	Disc 8.5mm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	-40°C ~ 125°C	-55°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Bulk	Bulk

Engineering Selection Recommendations

Direct Replacements (Identical Electrical & Mechanical Specifications):

V150ZS1P (Littelfuse Inc., Active): Identical electrical parameters with tape & reel packaging. Suitable for high-volume production environments. Maximum DC voltage rating of 127 V provides marginal improvement over the original specification.
MOV-07D151K (Bourns Inc., Active): Identical electrical and physical specifications in bulk packaging. Extensive inventory availability (25,223 pcs) ensures supply continuity.
MOV-07D151KTR (Bourns Inc., Active): Identical to MOV-07D151K with tape & reel packaging for automated assembly processes.

Form Factor Variants (Electrical Compatibility with Physical Differences):

VDRS07H095BSE (Vishay Beyschlag, Active): Maintains all electrical specifications with 9mm disc form factor. Requires PCB layout verification due to increased package diameter.
ERZ-V07D151 (Panasonic Electronic Components, Active): Enhanced surge current rating of 1.75 kA with 8.5mm disc form factor. Provides improved transient protection margin. Requires PCB layout verification due to increased package diameter.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can V150ZS1P directly replace ROV07-151K-S-2 on existing PCBs?

A: Yes. V150ZS1P matches all critical electrical parameters (150 V varistor voltage, 1.2 kA surge current, 125 V maximum DC) and maintains the 7mm disc form factor. The only difference is packaging format (tape & reel vs. bulk), which does not affect electrical performance or PCB mounting compatibility.

Q: What is the difference between MOV-07D151K and MOV-07D151KTR?

A: Both parts are electrically and mechanically identical. MOV-07D151K is supplied in bulk packaging, while MOV-07D151KTR is supplied in tape & reel format. Selection depends on assembly process requirements: bulk for manual or semi-automated assembly, tape & reel for fully automated pick-and-place systems.

Q: Why does ERZ-V07D151 have a higher surge current rating (1.75 kA vs. 1.2 kA)?

A: ERZ-V07D151 is a higher-performance variant from Panasonic's ZNR® series. The increased surge current capacity provides greater transient energy absorption. This part is electrically compatible but requires PCB layout verification due to the 8.5mm disc diameter (compared to 7mm for the original part).

Q: Can VDRS07H095BSE be used as a direct drop-in replacement?

A: VDRS07H095BSE is electrically compatible but has a 9mm disc form factor compared to the original 7mm. PCB layout verification is required to confirm adequate clearance around the component footprint. Electrical performance is equivalent.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original ROV07-151K-S-2 specification.

Q: What is the maximum operating temperature difference between substitutes?

A: The original ROV07-151K-S-2 operates to 125°C. Most active substitutes are rated to 85°C maximum. V150ZS1P extends to 85°C but offers -55°C minimum temperature capability. Application thermal requirements must be evaluated against substitute part ratings.

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