ROV07-181K Equivalent & Substitute Parts

Part Overview

The ROV07-181K is a 180V 1.2kA varistor in a 7mm disc package manufactured by Littelfuse Inc. This transient voltage suppressor is designed for through-hole mounting applications requiring overvoltage protection. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and component procurement. Active alternatives from Littelfuse and EPCOS maintain the same electrical performance envelope while offering improved availability and extended product lifecycles.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	180 V
Current - Surge	1.2 kA
Maximum AC Volts	115 V
Maximum DC Volts	150 V
Number of Circuits	1
Mounting Type	Through Hole
Package / Case	Disc 7mm
Operating Temperature Range	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ROV07-181K is determined by the following critical parameters:

Varistor voltage range: 162V (Min) to 198V (Max)
Surge current rating: 1.2 kA minimum
Package type: Disc 7mm through-hole
Number of circuits: 1
Maximum AC/DC voltage ratings: 115V AC / 150V DC minimum
RoHS3 compliance and REACH unaffected status

All listed substitutes meet these core electrical and mechanical requirements. Differences in energy rating, capacitance, and operating temperature ranges are secondary parameters that do not prevent functional substitution in applications designed for the ROV07-181K.

Parameter Comparison

Parameter	ROV07-181K	V180ZA1P	V180ZS1P	B72207S0111K211
Manufacturer	Littelfuse Inc.	Littelfuse	Littelfuse Inc.	EPCOS - TDK Electronics
Product Status	Obsolete	Active	Active	Active
Varistor Voltage (Typ)	180 V	180 V	180 V	180 V
Varistor Voltage (Min)	162 V	162 V	162 V	162 V
Varistor Voltage (Max)	198 V	198 V	198 V	198 V
Current - Surge	1.2 kA	1.2 kA	1.2 kA	1.2 kA
Maximum AC Volts	115 V	115 V	115 V	115 V
Maximum DC Volts	150 V	153 V	153 V	150 V
Energy	13 J	10 J	10 J	8.4 J
Number of Circuits	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm	Disc 7mm
Operating Temperature	-40°C ~ 125°C	-55°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts are active products with full RoHS3 compliance and REACH unaffected status, providing long-term supply chain stability compared to the obsolete ROV07-181K.

V180ZA1P and V180ZS1P (Littelfuse): These parts maintain identical electrical specifications to the original part and are manufactured by the original equipment supplier. V180ZS1P offers the highest inventory availability in cut tape packaging. Both parts feature slightly extended maximum DC voltage ratings (153V vs. 150V) and operate across a narrower temperature range (-55°C to 85°C).

B72207S0111K211 (EPCOS - TDK Electronics): This alternative meets all core electrical requirements with identical varistor voltage and surge current ratings. It maintains the original maximum DC voltage specification of 150V and supports a wider operating temperature range (-40°C to 105°C). Energy rating is lower at 8.4J compared to the original 13J specification.

Selection between these substitutes depends on supply chain preferences, packaging requirements (bulk vs. cut tape), and thermal operating envelope constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can V180ZA1P or V180ZS1P be used as direct replacements for ROV07-181K?

A: Yes. Both parts share identical varistor voltage (180V typical), surge current (1.2 kA), and package specifications (Disc 7mm through-hole). The primary difference is product status (active vs. obsolete) and operating temperature range. V180ZA1P and V180ZS1P operate from -55°C to 85°C, compared to the original -40°C to 125°C range.

Q: What is the difference between V180ZA1P and V180ZS1P?

A: Both parts are electrically identical. The primary distinction is packaging: V180ZA1P is supplied in bulk packaging, while V180ZS1P is supplied in cut tape. V180ZS1P has significantly higher inventory availability (19,830 pcs vs. 1,805 pcs).

Q: Can the B72207S0111K211 substitute for ROV07-181K?

A: Yes. The B72207S0111K211 meets all critical electrical specifications: 180V varistor voltage, 1.2 kA surge current, and Disc 7mm package. It maintains the original 150V maximum DC voltage rating and supports a wider operating temperature range (-40°C to 105°C). Energy rating is lower (8.4J vs. 13J), which does not prevent substitution in standard overvoltage protection applications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. All parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: Which substitute should be selected for new designs?

A: V180ZS1P is recommended for new designs due to active product status, highest inventory availability, and Littelfuse original manufacturer support. B72207S0111K211 is a viable alternative if EPCOS supply chain preference or extended temperature range (-40°C to 105°C) is required.

Q: Does the lower energy rating of B72207S0111K211 affect performance?

A: Energy rating differences (8.4J vs. 13J) reflect transient energy absorption capacity. Selection depends on application-specific transient energy requirements. All parts meet the 1.2 kA surge current specification and 180V varistor voltage requirement.

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