V271CA40PS Equivalent & Substitute Parts

Part Overview

The V271CA40PS is a 430V 40kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This surface mount disc varistor (40mm) provides single-circuit protection with 400J energy rating and operates across -55°C to 85°C. The part is classified as obsolete, making equivalent substitutes necessary for ongoing procurement and system maintenance.

Substiute Parts

V271CA40PS

Littelfuse Inc.In Stock: 721V271CA40PS Datasheet

Current PartRFQ

V271HC40

Littelfuse Inc.In Stock: 1087V271HC40 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The V271CA40PS can be substituted with the V271HC40 based on the following electrical and mechanical equivalence criteria:

Electrical Equivalence:

• Identical varistor voltage rating: 430V typical
• Identical surge current capacity: 40 kA
• Identical energy rating: 400 J
• Identical maximum AC/DC voltage specifications: 275V AC / 369V DC
• Identical operating temperature range: -55°C to 85°C
• Single circuit configuration maintained

Mechanical Compatibility:

• Both use 40mm disc package form factor
• Mounting type differs: V271CA40PS uses surface mount; V271HC40 uses bolt mount with formed tabs

Compliance Alignment:

• Both are ROHS3 compliant
• Both carry EAR99 ECCN classification
• Both share identical HTSUS code: 8533.40.4000

Parameter Comparison

Engineering Selection Recommendations

The V271HC40 is the direct electrical equivalent for the obsolete V271CA40PS. Both parts maintain identical electrical performance across all critical parameters: 430V varistor voltage, 40kA surge current, and 400J energy rating. Both achieve ROHS3 compliance and carry the same regulatory classification.

The primary design consideration is the mounting interface. The V271CA40PS employs surface mount technology, while the V271HC40 uses bolt mount with formed tabs. System integration must accommodate this mechanical difference. The V271HC40's active product status ensures long-term availability and supply chain continuity compared to the obsolete V271CA40PS.

Frequently Asked Questions (FAQ)

Q: Can V271HC40 directly replace V271CA40PS in all applications?

A: Electrical substitution is complete. Mechanical integration requires verification of mounting interface compatibility. Surface mount (V271CA40PS) and bolt mount (V271HC40) configurations differ and must be evaluated against your PCB or assembly design.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both parts share identical varistor voltage (430V typical), surge current (40kA), energy rating (400J), and operating temperature range (-55°C to 85°C). Varistor voltage minimum differs by 2V (389V vs 387V), which remains within acceptable tolerance for this product category.

Q: What is the advantage of selecting V271HC40 over V271CA40PS?

A: The V271HC40 carries active product status, ensuring ongoing manufacturing and availability. The V271CA40PS is obsolete and subject to supply discontinuation.

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, carry EAR99 ECCN classification, and share identical HTSUS code 8533.40.4000.

Q: What does the mounting type difference mean for my design?

A: V271CA40PS is designed for surface mount assembly on PCBs. V271HC40 uses bolt mount with formed tabs, typically for direct connection to bus bars or terminal blocks. Your assembly method and mechanical layout determine which mounting type is appropriate.