V18ZC1 Equivalent & Substitute Parts

Part Overview

The V18ZC1 is an 18V 250A varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This component features a through-hole disc package (7mm) with a single circuit configuration and is rated for surge currents up to 250A with 0.8J energy absorption capability.

The V18ZC1 carries an obsolete product status. Identifying equivalent and substitute parts is essential for maintaining design continuity, ensuring supply chain reliability, and supporting long-term product maintenance and repair operations.

Substiute Parts

V18ZC1

Littelfuse Inc.In Stock: 822V18ZC1 Datasheet

Current PartRFQ

V18ZC1P

Littelfuse Inc.In Stock: 874V18ZC1P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the V18ZC1 is determined by strict equivalence across the following critical parameters:

• Varistor Voltage Rating: Nominal 18V with tolerance range 16.2V to 19.8V
• Surge Current Capacity: 250A minimum
• Energy Absorption: 0.8J minimum
• Mounting Configuration: Through-hole disc package, 7mm form factor
• Circuit Count: Single circuit (1 circuit)
• Operating Temperature Range: -55°C to +85°C minimum
• Regulatory Compliance: ROHS3 compliance required

The V18ZC1P qualifies as a direct substitute based on identical electrical specifications, mechanical packaging, and regulatory certifications. The primary distinction is product status: V18ZC1P maintains active production status, whereas V18ZC1 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

V18ZC1P is the direct substitute for V18ZC1. Both components are manufactured by Littelfuse Inc. within the ZC series and maintain identical electrical and mechanical specifications across all critical parameters.

The V18ZC1P offers the advantage of active product status, ensuring continued availability and supply chain support. Both parts meet ROHS3 compliance requirements and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, making them suitable for standard storage and handling conditions.

For applications currently using V18ZC1, transition to V18ZC1P requires no circuit redesign or performance re-evaluation, as all functional parameters remain unchanged. The packaging format (through-hole disc 7mm) and electrical performance (18V nominal, 250A surge capacity, 0.8J energy absorption) are fully preserved.

Frequently Asked Questions (FAQ)

Q: Can V18ZC1P be used as a direct replacement for V18ZC1?

A: Yes. V18ZC1P is a direct substitute with identical electrical specifications, mechanical packaging, and regulatory compliance. The only difference is product status: V18ZC1P is active production while V18ZC1 is obsolete.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution requires matching varistor voltage rating (18V nominal, 16.2V–19.8V range), surge current capacity (250A), energy absorption (0.8J), mounting type (through-hole), package form factor (disc 7mm), circuit count (1 circuit), and operating temperature range (-55°C to +85°C).

Q: Are there any compliance or certification differences between V18ZC1 and V18ZC1P?

A: No. Both parts are ROHS3 compliant and carry identical MSL Level 1 (Unlimited) ratings. Both share the same ECCN (EAR99) and HTSUS (8533.40.4000) classifications.

Q: What is the difference between the packaging specifications for these parts?

A: V18ZC1 is listed with unspecified packaging, while V18ZC1P is supplied in bulk packaging. Both use identical disc 7mm through-hole form factors. Packaging type does not affect electrical or mechanical compatibility.

Q: Is circuit redesign necessary when transitioning from V18ZC1 to V18ZC1P?

A: No. All functional parameters are identical. Direct board-level substitution is possible without circuit modification or performance re-evaluation.