ROV14-181K Equivalent & Substitute Parts

Part Overview

The ROV14-181K is a 180V 4.5kA varistor in a 14mm disc package manufactured by Littelfuse Inc. This transient voltage suppressor is designed for single-circuit through-hole applications with an operating temperature range of -40°C to 125°C. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	180 V
Current - Surge	4.5 kA
Maximum DC Volts	150 V
Maximum AC Volts	115 V
Package / Case	Disc 14mm
Mounting Type	Through Hole
Number of Circuits	1
Operating Temperature Range	-40°C ~ 125°C

Substitute Part Grouping Explanation

Substitution for the ROV14-181K is determined by strict equivalence in the following electrical and mechanical parameters:

Varistor voltage rating (162V minimum, 180V typical, 198V maximum)
Surge current capacity (4.5 kA)
Maximum DC voltage specification (150V or higher)
Maximum AC voltage specification (115V or higher)
Package form factor (Disc 14mm)
Through-hole mounting configuration
Single-circuit design

The two qualified substitutes meet these criteria while offering active product status and improved compliance certifications.

Parameter Comparison

Parameter	ROV14-181K	V180ZA10P	B72214S0111K551
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	EPCOS - TDK Electronics
Product Status	Obsolete	Active	Active
Varistor Voltage (Min)	162 V	162 V	162 V
Varistor Voltage (Typ)	180 V	180 V	180 V
Varistor Voltage (Max)	198 V	198 V	198 V
Current - Surge	4.5 kA	4.5 kA	4.5 kA
Maximum DC Volts	150 V	153 V	150 V
Maximum AC Volts	115 V	115 V	115 V
Number of Circuits	1	1	1
Package / Case	Disc 14mm	Disc 14mm	Disc 14mm
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature Range	-40°C ~ 125°C	-55°C ~ 85°C	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both V180ZA10P and B72214S0111K551 are qualified substitutes for the obsolete ROV14-181K based on electrical parameter equivalence and compliance certifications.

V180ZA10P is manufactured by Littelfuse Inc., the original equipment manufacturer, and maintains ROHS3 compliance with MSL 1 rating. This part offers a slightly higher maximum DC voltage specification (153V versus 150V) and is available in bulk packaging.

B72214S0111K551 is manufactured by EPCOS - TDK Electronics and maintains ROHS3 compliance. This part is supplied in tape and reel packaging and offers an operating temperature range of -40°C to 105°C. Both substitutes are active products with established supply chains.

Selection between these substitutes should be based on packaging requirements (bulk versus tape and reel), operating temperature constraints specific to the application, and established supplier relationships.

Frequently Asked Questions (FAQ)

Q: Can V180ZA10P or B72214S0111K551 be used as direct replacements for ROV14-181K?

A: Yes. Both parts meet the electrical specifications (180V typical varistor voltage, 4.5kA surge current) and mechanical requirements (14mm disc package, through-hole mounting) of the original part. Both are ROHS3 compliant and REACH unaffected.

Q: What is the difference in operating temperature ranges between the substitutes?

A: V180ZA10P operates from -55°C to 85°C, while B72214S0111K551 operates from -40°C to 105°C. The original ROV14-181K operates from -40°C to 125°C. Applications requiring the full upper temperature range of the original part should verify compatibility with the substitute's maximum operating temperature.

Q: Are there packaging differences between the substitutes?

A: V180ZA10P is supplied in bulk packaging, while B72214S0111K551 is supplied in tape and reel format. Packaging selection depends on assembly process requirements and order quantities.

Q: Do both substitutes have the same energy rating as the original part?

A: No. The ROV14-181K has an energy rating of 52J, while V180ZA10P is rated at 35J and B72214S0111K551 is rated at 30J. Applications with specific energy absorption requirements should verify that the substitute's energy rating is adequate for the intended transient suppression duty.

Q: Are all three parts RoHS compliant?

A: Yes. ROV14-181K, V180ZA10P, and B72214S0111K551 are all ROHS3 compliant and REACH unaffected.

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