V27ZC4 Equivalent & Substitute Parts

Part Overview

The V27ZC4 is a 27 V, 1 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc package (14mm). This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The V27ZC4 operates across a temperature range of -55°C to 85°C and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substiute Parts

V27ZC4

Littelfuse Inc.In Stock: 738V27ZC4 Datasheet

Current PartRFQ

V27ZC4P

Littelfuse Inc.In Stock: 668V27ZC4P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the V27ZC4 is determined by strict equivalence across the following critical parameters:

• Varistor voltage rating (27 V nominal, 24.3 V – 29.7 V range)
• Surge current capacity (1 kA)
• Maximum AC and DC voltage ratings (17 V AC, 22 V DC)
• Energy absorption (5 J)
• Single-circuit configuration
• Through-hole mounting with 14mm disc package
• Operating temperature range (-55°C to 85°C)
• Capacitance specification (11480 pF @ 1 MHz)

The V27ZC4P is a direct equivalent substitute, differing only in packaging format (bulk vs. standard) and product status (active vs. obsolete). All electrical and mechanical parameters remain identical.

Parameter Comparison

Engineering Selection Recommendations

The V27ZC4P is the direct functional equivalent for the obsolete V27ZC4. Both parts maintain identical electrical specifications, thermal performance, and mechanical compatibility. The V27ZC4P carries active product status from Littelfuse Inc., ensuring continued availability and supply chain reliability. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1), suitable for standard storage and handling conditions. The distinction between standard and bulk packaging does not affect electrical or mechanical performance; packaging selection depends on procurement and inventory requirements.

Frequently Asked Questions (FAQ)

Q: Can V27ZC4P be used as a direct replacement for V27ZC4?

A: Yes. The V27ZC4P is electrically and mechanically identical to the V27ZC4. All voltage ratings, surge current capacity, energy absorption, and thermal specifications are equivalent. The only differences are product status (active vs. obsolete) and packaging format (bulk vs. standard).

Q: What determines whether a part can substitute for the V27ZC4?

A: Substitution requires matching across all critical parameters: 27 V nominal varistor voltage (24.3 V – 29.7 V range), 1 kA surge current, 17 V maximum AC rating, 22 V maximum DC rating, 5 J energy rating, single-circuit configuration, through-hole mounting, 14mm disc package, -55°C to 85°C operating temperature, and 11480 pF capacitance at 1 MHz.

Q: Does packaging format affect electrical performance?

A: No. Standard and bulk packaging formats do not alter electrical characteristics, thermal performance, or mechanical fit. Packaging selection is based on procurement volume and inventory management requirements.

Q: Are both parts ROHS3 compliant?

A: Yes. Both V27ZC4 and V27ZC4P are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level.

Q: Why is the V27ZC4 listed as obsolete?

A: The V27ZC4 has been discontinued by Littelfuse Inc. The V27ZC4P remains in active production and is the recommended source for new designs and ongoing supply.