ROV07H220L Equivalent & Substitute Parts

Part Overview

The ROV07H220L is a 22V 500A varistor manufactured by Littelfuse in a through-hole disc 7mm package. This component is classified as a Transient Voltage Suppressor (TVS) and is currently listed as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and procurement planning. Substitute parts must maintain electrical compatibility within the specified voltage and surge current parameters while accommodating potential package variations.

Key Parameters

Parameter	Value
Varistor Voltage (Typ)	22 V
Current - Surge	500 A
Maximum DC Volts	18 V
Maximum AC Volts	14 V
Energy	1.7 J
Operating Temperature Range	-40°C ~ 125°C
Package / Case	Disc 7mm
Mounting Type	Through Hole
Number of Circuits	1

Substitute Part Grouping Explanation

Substitute parts for the ROV07H220L are evaluated based on the following critical parameters:

Varistor Voltage (Typ): Must be 22 V to maintain voltage suppression characteristics
Current - Surge: Rated capacity for transient current handling
Maximum DC/AC Volts: Operating voltage limits
Package / Case: Physical form factor and mounting compatibility
Operating Temperature Range: Thermal operating limits
Product Status: Active status preferred for long-term availability

Two substitute parts are identified:

V22ZA1P (Littelfuse): Direct manufacturer alternative with reduced surge current rating (250 A vs. 500 A) but identical voltage specifications and package form factor.
ERZ-V07D220 (Panasonic): Manufacturer-recommended cross-reference with matching surge current rating (500 A) and voltage specifications. Package variation exists (8.5mm vs. 7mm disc).

Parameter Comparison

Parameter	ROV07H220L (Main)	V22ZA1P (Littelfuse)	ERZ-V07D220 (Panasonic)
Manufacturer	Littelfuse	Littelfuse	Panasonic Electronic Components
Varistor Voltage (Min)	18.7 V	19.8 V	20 V
Varistor Voltage (Typ)	22 V	22 V	22 V
Varistor Voltage (Max)	25.3 V	24.2 V	24 V
Current - Surge	500 A	250 A	500 A
Energy	1.7 J	0.9 J	1.3 J
Maximum DC Volts	18 V	18 V	18 V
Maximum AC Volts	14 V	14 V	14 V
Operating Temperature Range	-40°C ~ 125°C	-55°C ~ 85°C	-40°C ~ 85°C
Package / Case	Disc 7mm	Disc 7mm	Disc 8.5mm
Mounting Type	Through Hole	Through Hole	Through Hole
Number of Circuits	1	1	1
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

V22ZA1P Selection: This Littelfuse part maintains identical voltage specifications and package dimensions (Disc 7mm). However, the surge current rating is reduced to 250 A compared to the original 500 A specification. This part is suitable for applications where surge current requirements do not exceed 250 A. The part is active and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

ERZ-V07D220 Selection: This Panasonic part matches the original surge current rating (500 A) and voltage specifications exactly. The package form factor differs slightly (8.5mm vs. 7mm disc), which may require PCB layout verification for mechanical fit. This part is active and ROHS3 compliant. The operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification.

Both substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can V22ZA1P be used as a direct replacement for ROV07H220L?

A: V22ZA1P is electrically compatible for voltage suppression at 22 V nominal. The primary difference is the reduced surge current rating (250 A vs. 500 A). Use this part only if your application's transient current does not exceed 250 A. The package dimensions are identical (Disc 7mm through-hole).

Q: What is the main limitation of ERZ-V07D220 as a substitute?

A: The package form factor differs: ERZ-V07D220 uses a Disc 8.5mm package versus the original Disc 7mm. Verify PCB hole spacing and mechanical clearance before substitution. The operating temperature maximum is also reduced to 85°C compared to the original 125°C specification.

Q: Are both substitute parts suitable for new designs?

A: Both substitute parts are active products with ROHS3 compliance and REACH unaffected status. ERZ-V07D220 is the manufacturer-recommended cross-reference and maintains full electrical specifications. V22ZA1P is suitable if surge current requirements are within its 250 A rating.

Q: What parameters must remain constant for substitution?

A: Varistor voltage (22 V nominal), maximum DC volts (18 V), maximum AC volts (14 V), and number of circuits (1) must remain constant. Surge current rating and package dimensions may vary depending on application requirements and PCB layout constraints.

Q: How do capacitance values differ between these parts?

A: Capacitance values vary: ROV07H220L measures 2930 pF @ 1 kHz, V22ZA1P measures 2375 pF @ 1 MHz, and ERZ-V07D220 measures 3600 pF @ 1 kHz. These differences reflect manufacturing variations and measurement frequency differences but do not affect primary varistor suppression function.

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