V22ZU2 Equivalent & Substitute Parts Reference

Part Overview

The V22ZU2 is a 22V 500A varistor manufactured by Littelfuse Inc., classified as a Transient Voltage Suppressor (TVS) device. This through-hole disc varistor (10mm) is designed for single-circuit transient voltage suppression applications with a nominal varistor voltage of 22V and surge current capability of 500A.

The V22ZU2 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

V22ZU2

Littelfuse Inc.In Stock: 964V22ZU2 Datasheet

Current PartRFQ

V22ZU2P

Littelfuse Inc.In Stock: 890V22ZU2P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the V22ZU2 are identified based on strict electrical and mechanical parameter matching within the allowed tolerance ranges for varistor devices:

Critical Matching Parameters:

• Varistor voltage (typical): 22V
• Varistor voltage tolerance range: 19.8V – 24.2V
• Surge current rating: 500A
• Maximum AC/DC voltage ratings: 14V AC / 18V DC
• Energy rating: 2J
• Single-circuit configuration
• Through-hole mounting with 10mm disc package
• Operating temperature range: -55°C to 85°C
• RoHS3 compliance

The V22ZU2P qualifies as a direct substitute because it maintains identical electrical specifications and mechanical form factor while differing only in packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The V22ZU2P is the direct substitute for the obsolete V22ZU2. Both parts are manufactured by Littelfuse Inc. within the ZU series and maintain identical electrical performance specifications across all critical parameters: varistor voltage (22V nominal), surge current (500A), voltage ratings (14V AC / 18V DC maximum), energy dissipation (2J), and operating temperature range (-55°C to 85°C).

The V22ZU2P carries Active product status, ensuring ongoing manufacturer support and supply chain availability. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1).

The primary differences are packaging format (V22ZU2P is supplied in Tape & Reel format) and capacitance at 1 MHz (V22ZU2P: 4500 pF versus V22ZU2: 2375 pF). These differences do not affect functional substitution for transient voltage suppression applications where the specified electrical parameters govern performance.

Frequently Asked Questions (FAQ)

Q: Can V22ZU2P be used as a direct replacement for V22ZU2 in existing designs?

A: Yes. The V22ZU2P is electrically and mechanically identical to the V22ZU2. Both parts share the same varistor voltage (22V), surge current rating (500A), voltage limits (14V AC / 18V DC), energy rating (2J), and through-hole 10mm disc package. The V22ZU2P is the active production equivalent.

Q: What is the difference between V22ZU2 and V22ZU2P?

A: The V22ZU2 is supplied in bulk packaging, while the V22ZU2P is supplied in Tape & Reel (TR) format. The V22ZU2 is obsolete; the V22ZU2P is active. Capacitance at 1 MHz differs (2375 pF versus 4500 pF), but this does not affect transient voltage suppression performance for the specified electrical parameters.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, carry identical moisture sensitivity levels (MSL 1), and share the same ECCN and HTSUS classifications.

Q: Does the capacitance difference between V22ZU2 and V22ZU2P affect circuit performance?

A: Capacitance differences do not alter the core transient voltage suppression function when the specified electrical parameters (varistor voltage, surge current, energy rating, and voltage limits) are met. Application-specific circuit analysis is required if capacitance is a critical design parameter.

Q: What packaging considerations apply when switching from V22ZU2 to V22ZU2P?

A: The V22ZU2P is supplied in Tape & Reel format, which is standard for automated assembly processes. If bulk packaging is required, contact the manufacturer or authorized distributor for availability options.