ROV05-201K-S-2 Equivalent & Substitute Parts

Part Overview

The ROV05-201K-S-2 is a 200 V, 400 A Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse in a through-hole disc 5mm package. This component is designed for single-circuit transient voltage suppression applications with a rated energy capacity of 7.1 J and operating temperature range of -40°C to 85°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for existing designs.

Key Parameters

Parameter	Value
Varistor Voltage (Typ)	200 V
Current - Surge	400 A
Maximum AC Volts	130 V
Maximum DC Volts	170 V
Energy	7.1 J
Number of Circuits	1
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Disc 5mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ROV05-201K-S-2 is determined by the following critical parameters:

Varistor voltage range (180 V - 220 V nominal tolerance)
Surge current capacity (minimum 400 A)
Maximum AC and DC voltage ratings (130 V AC / 170 V DC)
Through-hole mounting configuration
Disc package form factor (5mm or compatible)
Single-circuit configuration
Operating temperature compatibility (-40°C ~ 85°C minimum)
RoHS3 compliance

Two substitute parts meet these criteria with allowable parameter variations within standard component tolerances.

Parameter Comparison

Parameter	ROV05-201K-S-2 (Main)	V205ZS05P (Littelfuse)	ERZ-V05D201 (Panasonic)
Varistor Voltage (Typ)	200 V	205 V	200 V
Varistor Voltage (Min)	180 V	184.5 V	185 V
Varistor Voltage (Max)	220 V	225.5 V	225 V
Current - Surge	400 A	400 A	800 A
Maximum AC Volts	130 V	130 V	130 V
Maximum DC Volts	170 V	170 V	170 V
Energy	7.1 J	5.5 J	8.5 J
Number of Circuits	1	1	1
Operating Temperature	-40°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 5mm	Disc 5mm	Disc 7mm
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts maintain compliance with RoHS3 requirements and REACH unaffected status, ensuring regulatory alignment with the original component.

V205ZS05P (Littelfuse) provides the closest electrical match with identical surge current capacity (400 A) and varistor voltage within 5 V of the original specification. This part is available in active production status with identical 5mm disc packaging, enabling direct mechanical substitution. The extended operating temperature range (-55°C ~ 85°C) provides additional thermal margin. Energy rating of 5.5 J is lower than the original 7.1 J specification.

ERZ-V05D201 (Panasonic ZNR® series) offers enhanced surge current capacity (800 A) and higher energy rating (8.5 J), providing increased transient suppression capability. The varistor voltage remains within specification tolerance. The package form factor is Disc 7mm rather than 5mm, requiring mechanical design verification for board layout compatibility. This part is in active production status.

Selection between these substitutes depends on mechanical space constraints and required surge current margin for the application.

Frequently Asked Questions (FAQ)

Q: Can V205ZS05P directly replace ROV05-201K-S-2 without circuit modification?

A: V205ZS05P maintains electrical parameters within acceptable tolerance for the ROV05-201K-S-2 application. Varistor voltage is 205 V nominal versus 200 V original, within the 180 V - 220 V specification band. Surge current capacity is identical at 400 A. Maximum AC/DC voltage ratings are unchanged. Direct substitution is electrically compatible provided board layout accommodates the through-hole disc 5mm package.

Q: What is the impact of the lower energy rating in V205ZS05P?

A: V205ZS05P has an energy rating of 5.5 J compared to the original 7.1 J. This represents a 22.5% reduction in energy absorption capacity. Application suitability depends on the actual transient energy profile in the circuit. If transient events consistently remain below 5.5 J, this substitute is appropriate. Higher energy transients may require the ERZ-V05D201 alternative.

Q: Is ERZ-V05D201 mechanically compatible with the original PCB layout?

A: ERZ-V05D201 uses a Disc 7mm package versus the original Disc 5mm. Physical board layout verification is required to confirm mounting hole spacing and component clearance compatibility. The through-hole mounting type is identical, but the larger package diameter may conflict with existing PCB design constraints.

Q: Do all three parts share the same operating temperature range?

A: ROV05-201K-S-2 and ERZ-V05D201 both operate from -40°C to 85°C. V205ZS05P extends the lower temperature limit to -55°C, providing additional cold-temperature margin. All three parts meet the -40°C ~ 85°C requirement of the original specification.

Q: Are there packaging differences that affect procurement?

A: ROV05-201K-S-2 packaging is not specified in available data. V205ZS05P is supplied in Tape & Reel (TR) format. ERZ-V05D201 is supplied in Bulk format. Packaging selection may affect lead times and minimum order quantities for procurement planning.

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