Littelfuse V47ZC7 47V 1kA Varistor Equivalent & Substitute Parts

Part Overview

The Littelfuse V47ZC7 is a 47 V, 1 kA transient voltage suppressor varistor in a through-hole disc 14mm package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The V47ZC7 series provides transient voltage suppression across a single circuit with rated energy dissipation of 8.8 J and operates across the temperature range of -55°C to 85°C.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	47 V
Varistor Voltage Range	42.3 V (Min) to 51.7 V (Max)
Current - Surge	1 kA
Energy Dissipation	8.8 J
Maximum AC Voltage	30 V
Maximum DC Voltage	38 V
Capacitance @ 1 MHz	6270 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 14mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the obsolete V47ZC7 is based on electrical and mechanical parameter equivalence. All substitute parts maintain identical specifications across the following critical parameters:

Varistor voltage rating: 47 V (42.3 V to 51.7 V range)
Surge current capacity: 1 kA
Energy dissipation: 8.8 J
Maximum AC/DC voltage ratings: 30 V AC / 38 V DC
Capacitance: 6270 pF @ 1 MHz
Operating temperature: -55°C to 85°C
Mounting configuration: Through hole, disc 14mm package
Single circuit configuration
RoHS3 compliance and MSL 1 rating

Substitute parts are classified into two categories: direct manufacturer equivalents (same series designation) and parametric equivalents (different series designation but identical electrical and mechanical characteristics). All substitute parts are in active product status with current manufacturing availability.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Varistor Voltage (Typ)	Surge Current	Energy	Max AC / DC	Capacitance @ 1 MHz	Operating Temp	Package	RoHS
V47ZC7	Littelfuse Inc.	ZC	Obsolete	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3
V47ZC7P	Littelfuse Inc.	ZC	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3
V47ZA7P	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3
V47ZA7PX1347	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3
V47ZA7PX2855	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3
V47ZC7PX2855	Littelfuse Inc.	ZC	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C to 85°C	Disc 14mm	ROHS3

Engineering Selection Recommendations

All listed substitute parts are manufactured by Littelfuse Inc. and maintain full electrical and mechanical equivalence to the obsolete V47ZC7. Selection among available substitutes should be based on the following factors:

Product Status: All substitute parts carry active product status, ensuring continued manufacturing support and availability. The V47ZC7P represents the direct series equivalent with the highest inventory availability (9,141 units), providing the most straightforward replacement path.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance and MSL 1 rating, matching the original component's environmental and regulatory standing. REACH unaffected status is confirmed for all active substitutes.

Packaging and Inventory: Substitute parts are supplied in bulk packaging. Inventory levels vary across part numbers, with V47ZC7P offering the largest stock position, followed by V47ZA7P (2,200 units), V47ZA7PX1347 (1,074 units), V47ZA7PX2855 (1,009 units), and V47ZC7PX2855 (981 units).

Series Designation: The ZC series substitutes (V47ZC7P, V47ZC7PX2855) maintain the original series lineage. The ZA series substitutes (V47ZA7P, V47ZA7PX1347, V47ZA7PX2855) represent parametric equivalents from an alternative series within the Littelfuse varistor portfolio.

Frequently Asked Questions (FAQ)

Q: Can V47ZA7P series parts directly replace the obsolete V47ZC7?

A: Yes. The V47ZA7P series maintains identical electrical specifications (47 V varistor voltage, 1 kA surge current, 8.8 J energy) and mechanical configuration (through-hole disc 14mm package). Both series are manufactured by Littelfuse Inc. and carry ROHS3 compliance.

Q: What is the difference between V47ZC7P and V47ZC7PX2855?

A: Both parts are from the ZC series with identical electrical and mechanical parameters. The suffix designation (PX2855) indicates a specific manufacturing or distribution code. Electrical performance and package configuration are equivalent.

Q: Are the suffix codes (X1347, X2855) significant for circuit design?

A: No. The suffix codes represent manufacturing or supply chain identifiers and do not affect electrical performance or mechanical compatibility. All parts with the same base designation (V47ZA7P or V47ZC7P) are functionally equivalent.

Q: Which substitute part should be selected for new designs?

A: V47ZC7P is the recommended primary choice as the direct series equivalent with the highest inventory availability. V47ZA7P is an acceptable alternative if V47ZC7P becomes unavailable, as it maintains identical electrical and mechanical specifications.

Q: Are all substitute parts suitable for the same circuit applications?

A: Yes. All substitute parts are rated for identical voltage suppression (47 V), surge current handling (1 kA), and energy dissipation (8.8 J). They are suitable for any application originally designed for the V47ZC7.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate across -55°C to 85°C, matching the original V47ZC7 specification. This range applies to all listed alternatives.

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