V22ZS3 Equivalent & Substitute Parts

Part Overview

The V22ZS3 is a 22 V, 1 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component operates across a temperature range of -55°C to 85°C and is compliant with ROHS3 standards. The V22ZS3 carries an obsolete product status, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	22 V
Current - Surge	1 kA
Maximum DC Volts	18 V
Maximum AC Volts	14 V
Energy	4 J
Capacitance @ 1 MHz	14730 pF
Operating Temperature Range	-55°C to 85°C
Package / Case	Disc 14mm
Mounting Type	Through Hole
Number of Circuits	1

Substitute Part Grouping Explanation

Substitution for the V22ZS3 is determined by strict electrical and mechanical parameter matching. All substitute parts maintain identical specifications across the following critical parameters:

Varistor voltage range: 19.8 V (Min) to 24.2 V (Max), with 22 V typical
Surge current rating: 1 kA
Maximum DC and AC voltage ratings: 18 V DC / 14 V AC
Energy dissipation: 4 J
Capacitance: 14730 pF @ 1 MHz
Operating temperature: -55°C to 85°C
Physical form factor: Disc 14mm through-hole package
Single circuit configuration

Substitute parts differ only in series designation (ZS, ZT, ZU), packaging format (Tape & Reel vs. bulk), and product status (Active vs. Obsolete). These differences do not affect electrical performance or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Packaging	Varistor Voltage (Typ)	Surge Current	Max DC Volts	Max AC Volts	Energy	Capacitance @ 1 MHz	Operating Temp	Package Type	RoHS Status	Inventory (Pcs)
V22ZS3	Littelfuse Inc.	ZS	Obsolete	Bulk	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	1072
V22ZS3P	Littelfuse Inc.	ZS	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	754
V22ZS3PX2855	Littelfuse Inc.	ZS	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	720
V22ZT3P	Littelfuse Inc.	ZT	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	618
V22ZT3PX1347	Littelfuse Inc.	ZT	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	700
V22ZT3PX2855	Littelfuse Inc.	ZT	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	890
V22ZU3P	Littelfuse Inc.	ZU	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	645
V22ZU3PX2855	Littelfuse	ZU	Active	Tape & Reel	22 V	1 kA	18 V	14 V	4 J	14730 pF	-55°C to 85°C	Disc 14mm	ROHS3	837

Engineering Selection Recommendations

All substitute parts listed are electrically and mechanically equivalent to the V22ZS3. Selection among these alternatives should be based on the following factors:

Product Status: The V22ZS3 is obsolete. All substitute parts carry active product status, ensuring long-term availability and manufacturing support. V22ZS3P, V22ZS3PX2855, V22ZT3P, V22ZT3PX1347, V22ZT3PX2855, V22ZU3P, and V22ZU3PX2855 are all actively manufactured.

Packaging Considerations: The original V22ZS3 is supplied in bulk packaging. All substitutes are available in Tape & Reel format, which is standard for automated assembly processes. If bulk packaging is required, consult with the manufacturer for availability.

Compliance: All parts maintain ROHS3 compliance and are suitable for applications requiring environmental regulatory adherence. No compliance differences exist among the listed alternatives.

Series Variants: The ZS, ZT, and ZU series designations represent internal manufacturing variants within Littelfuse's varistor product line. These designations do not affect electrical performance or mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can I directly replace V22ZS3 with any of the listed substitutes?

A: Yes. All listed parts are electrically and mechanically equivalent. They share identical varistor voltage ratings (22 V typical), surge current capacity (1 kA), voltage ratings, energy dissipation, capacitance, temperature range, and physical form factor (Disc 14mm through-hole).

Q: What is the difference between V22ZS3 and V22ZS3P?

A: The primary difference is packaging. V22ZS3 is supplied in bulk format, while V22ZS3P is supplied in Tape & Reel format. Electrically and mechanically, they are identical. V22ZS3P also carries active product status, whereas V22ZS3 is obsolete.

Q: Why are there multiple series variants (ZS, ZT, ZU)?

A: These series designations represent internal manufacturing variants within Littelfuse's product line. They do not affect electrical performance, mechanical compatibility, or application suitability. All variants meet the same electrical specifications.

Q: Are the X-suffix variants (PX2855, PX1347) different from the base part numbers?

A: The X-suffix designations indicate specific manufacturing date codes or internal tracking codes. Electrically and mechanically, these parts are identical to their base counterparts. The suffix does not affect performance or compatibility.

Q: Can I use Tape & Reel packaged parts in manual assembly applications?

A: Yes. Tape & Reel packaging is compatible with both automated and manual assembly processes. The parts can be removed from the tape for manual placement if required.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the compliance status of the original V22ZS3.

Q: Which substitute has the highest current inventory?

A: V22ZT3PX2855 has the highest inventory at 890 pieces, followed by V22ZU3PX2855 at 837 pieces. Inventory levels should be confirmed with the supplier for current availability.

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