ROV10-220L-S Equivalent & Substitute Parts

Part Overview

The ROV10-220L-S is a 22V 500A varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component features a 10mm disc package and is rated for surge currents up to 500A with 2.7J energy absorption capability. The part is currently classified as obsolete, making identification of suitable equivalent components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Varistor Voltage (Typ)	22 V
Current - Surge	500 A
Maximum DC Volts	18 V
Maximum AC Volts	14 V
Energy	2.7 J
Operating Temperature Range	-40°C ~ 85°C
Package / Case	Disc 10mm
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ROV10-220L-S is determined by the following critical parameters:

Primary Compatibility Criteria:

Varistor voltage rating: 22V nominal (acceptable range 19.8V to 25.3V minimum)
Surge current capacity: minimum 500A
Maximum DC voltage rating: 18V
Maximum AC voltage rating: 14V
Through-hole mounting configuration
Disc package form factor (10mm or 11.5mm)
Operating temperature range: -40°C to 85°C minimum

Identified Substitutes:

V22ZA2P (Littelfuse Inc.) - Direct electrical equivalent with identical voltage and surge current ratings. Active product status with improved availability. Varistor voltage range 19.8V to 24.2V. Energy rating 2J. Capacitance measured at 1MHz versus 1kHz on original part.
ERZ-V10D220 (Panasonic Electronic Components) - Functional equivalent with higher surge current capacity (1kA versus 500A). Varistor voltage range 20V to 24V. Larger disc package (11.5mm versus 10mm). Higher energy absorption (3.2J). Higher capacitance (11000pF @ 1kHz).

Parameter Comparison

Parameter	ROV10-220L-S	V22ZA2P	ERZ-V10D220
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Panasonic Electronic Components
Product Status	Obsolete	Active	Active
Varistor Voltage (Typ)	22 V	22 V	22 V
Varistor Voltage (Min)	18.7 V	19.8 V	20 V
Varistor Voltage (Max)	25.3 V	24.2 V	24 V
Current - Surge	500 A	500 A	1 kA
Energy	2.7 J	2 J	3.2 J
Maximum DC Volts	18 V	18 V	18 V
Maximum AC Volts	14 V	14 V	14 V
Operating Temperature	-40°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 85°C
Package / Case	Disc 10mm	Disc 10mm	Disc 11.5mm
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

V22ZA2P Selection Criteria: The V22ZA2P represents the direct equivalent for applications requiring identical electrical performance and physical dimensions. This part maintains the same 22V nominal rating, 500A surge capacity, and 10mm disc package. The active product status ensures current availability and supply chain continuity. ROHS3 compliance and REACH unaffected status align with the original part specifications. This substitute is appropriate for direct replacement in existing designs without layout modifications.

ERZ-V10D220 Selection Criteria: The ERZ-V10D220 is suitable for applications where enhanced surge current handling (1kA versus 500A) and increased energy absorption (3.2J versus 2.7J) provide system margin benefits. The larger 11.5mm disc package requires PCB layout verification for mechanical fit. The extended lower temperature rating (-55°C versus -40°C) accommodates broader environmental specifications. ROHS3 compliance and REACH unaffected status maintain regulatory alignment. This substitute is appropriate when design specifications permit the larger package footprint and benefit from increased transient suppression capacity.

Frequently Asked Questions (FAQ)

Q: Can V22ZA2P be used as a direct replacement for ROV10-220L-S? A: Yes. The V22ZA2P maintains identical varistor voltage (22V nominal), surge current rating (500A), maximum voltage ratings (18V DC, 14V AC), and package dimensions (10mm disc). Both parts are ROHS3 compliant. The primary difference is product status: V22ZA2P is active with established supply availability.

Q: What are the physical differences between the substitutes? A: The V22ZA2P uses a 10mm disc package matching the original ROV10-220L-S. The ERZ-V10D220 uses a larger 11.5mm disc package. PCB layout must accommodate the larger footprint if ERZ-V10D220 is selected.

Q: Does ERZ-V10D220 provide better performance than the original part? A: The ERZ-V10D220 offers higher surge current capacity (1kA versus 500A) and greater energy absorption (3.2J versus 2.7J). These characteristics provide increased transient suppression margin. The varistor voltage ratings remain compatible (22V nominal). Selection depends on whether the application benefits from enhanced surge handling capability.

Q: Are all substitutes RoHS compliant? A: Yes. ROV10-220L-S, V22ZA2P, and ERZ-V10D220 are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the temperature operating range for each part? A: ROV10-220L-S and ERZ-V10D220 operate from -40°C to 85°C. V22ZA2P extends the lower limit to -55°C, providing broader environmental coverage if required by system specifications.

Q: How do capacitance values differ between parts? A: ROV10-220L-S measures 5521pF @ 1kHz. V22ZA2P measures 4500pF @ 1MHz. ERZ-V10D220 measures 11000pF @ 1kHz. Capacitance differences reflect measurement frequency variations and internal construction differences. Selection should verify compatibility with circuit impedance and frequency response requirements.

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