Equivalent & Substitute Parts for V271HC40

Part Overview

The V271HC40 is a 430 V, 40 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a bolt mount disc configuration (40mm, formed tabs). This component is designed for single-circuit transient voltage suppression applications requiring high surge current capacity and energy absorption. The part is currently Active in product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the allowed specification range, ensuring functional interchangeability in the target application.

Substiute Parts

V271HC40

Littelfuse Inc.In Stock: 1087V271HC40 Datasheet

Current PartRFQ

V271HA40

Littelfuse Inc.In Stock: 1000V271HA40 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The V271HA40 is identified as a parametric equivalent to the V271HC40 based on the following substitution criteria:

• Identical varistor voltage range: 387 V (Min), 430 V (Typ), 473 V (Max)
• Identical surge current rating: 40 kA
• Identical energy absorption: 400 J
• Identical maximum AC and DC voltage ratings: 275 V AC, 369 V DC
• Identical capacitance specification: 4500 pF @ 1 MHz
• Identical operating temperature range: -55°C to 85°C
• Identical mounting configuration: Bolt Mount, Disc 40mm with Formed Tabs
• Identical circuit count: 1 Circuit
• Identical compliance certifications: RoHS3 Compliant, REACH Unaffected

The substitution is based on electrical performance equivalence and mechanical compatibility. Both parts belong to the Littelfuse HC/HA series varistors and maintain full functional interchangeability within the specified parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

Both V271HC40 and V271HA40 are Active products with identical electrical specifications and mechanical configurations. Selection between these parts may be based on inventory availability: V271HC40 has 1038 pieces in stock, while V271HA40 has 987 pieces available. Both parts maintain full RoHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. The series designation difference (HC versus HA) does not affect functional performance within the specified parameter range. Either part is suitable for direct substitution in 430 V, 40 kA transient voltage suppression circuits requiring bolt mount disc configuration.

Frequently Asked Questions (FAQ)

Q: Can V271HA40 be used as a direct replacement for V271HC40?

A: Yes. Both parts have identical electrical ratings (430 V typical varistor voltage, 40 kA surge current, 400 J energy), identical operating temperature range (-55°C to 85°C), and identical mechanical configuration (bolt mount, 40mm disc with formed tabs). All critical parameters for transient voltage suppression functionality are equivalent.

Q: What is the difference between the HC and HA series designations?

A: The series designation reflects internal manufacturing or design revision within the Littelfuse product line. Both HC and HA series varistors in this specification maintain identical electrical performance and mechanical compatibility for the V271 product family.

Q: Are there any compliance or certification differences between these parts?

A: No. Both V271HC40 and V271HA40 carry identical certifications: RoHS3 Compliant and REACH Unaffected status. Both are classified as Active products with no restrictions on use.

Q: What parameters determine substitutability for these varistors?

A: Substitutability is determined by matching varistor voltage range (387–473 V), surge current capacity (40 kA), energy absorption (400 J), maximum AC/DC voltage ratings (275 V AC, 369 V DC), operating temperature range (-55°C to 85°C), and mechanical configuration (bolt mount, 40mm disc). All these parameters are identical between V271HC40 and V271HA40.

Q: Can these parts be used in applications requiring different voltage or current ratings?

A: No. These parts are specified for 430 V nominal varistor voltage and 40 kA surge current. Applications with different voltage or current requirements require alternative part numbers with corresponding electrical specifications.