Littelfuse V47ZA7 Varistor 47V 1kA Equivalent & Substitute Parts

Part Overview

The Littelfuse V47ZA7 is a 47V 1kA disc varistor designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 47V nominal varistor voltage, 1kA surge current rating, and 14mm disc form factor to ensure direct functional replacement in existing circuit designs.

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 Absorption	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 V47ZA7 is based on strict equivalence of electrical and mechanical parameters. All substitute parts maintain identical varistor voltage specifications (42.3V minimum to 51.7V maximum), surge current rating (1kA), energy absorption (8.8J), capacitance (6270 pF @ 1 MHz), and physical form factor (14mm disc through-hole). The primary distinction between substitute options is product status and packaging configuration. Parts are grouped into two categories: direct manufacturer equivalents with alternative packaging designations (V47ZA7P series) and parametric equivalents from the ZC series (V47ZC7P variants). All substitute parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original component.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Varistor Voltage (Typ)	Current - Surge	Energy	Max AC / DC Volts	Capacitance @ 1 MHz	Operating Temp	Package	RoHS Status	Inventory
V47ZA7	Littelfuse Inc.	ZA	Obsolete	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	882 Pcs
V47ZA7P	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	2200 Pcs
V47ZA7PX1347	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	1074 Pcs
V47ZA7PX2855	Littelfuse Inc.	ZA	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	1009 Pcs
V47ZC7P	Littelfuse Inc.	ZC	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	9141 Pcs
V47ZC7PX2855	Littelfuse Inc.	ZC	Active	47 V	1 kA	8.8 J	30 V / 38 V	6270 pF	-55°C ~ 85°C	Disc 14mm	ROHS3	981 Pcs

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the V47ZA7 based on identical electrical and mechanical parameters. Selection among active alternatives should prioritize product availability and supply chain continuity. The V47ZC7P variant offers the highest inventory level (9141 units), providing optimal supply security for production requirements. All substitute options maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with existing procurement and environmental standards. The ZA series variants (V47ZA7P, V47ZA7PX1347, V47ZA7PX2855) provide direct series continuity with the original component, while the ZC series alternatives (V47ZC7P, V47ZC7PX2855) represent parametrically equivalent options from an alternative product line within the same manufacturer portfolio.

Frequently Asked Questions (FAQ)

Q: Can V47ZA7P be used as a direct replacement for V47ZA7? A: Yes. The V47ZA7P is a direct manufacturer equivalent with identical electrical specifications (47V nominal varistor voltage, 1kA surge current, 8.8J energy absorption) and mechanical form factor (14mm disc through-hole). The primary difference is product status; V47ZA7P is active while V47ZA7 is obsolete.

Q: What is the difference between ZA and ZC series variants? A: Both ZA and ZC series maintain identical electrical and mechanical parameters for this voltage and current rating. The series designation reflects internal manufacturing or design generation differences within Littelfuse's varistor product line. All parameters critical to circuit function remain equivalent.

Q: Are the PX suffix variants (V47ZA7PX1347, V47ZA7PX2855, V47ZC7PX2855) functionally identical to base part numbers? A: Yes. The PX suffix designations indicate packaging or tape/reel configuration variants. All electrical specifications, physical dimensions, and performance characteristics remain identical to the base part numbers.

Q: Which substitute part should be selected for new designs? A: For new designs, select from active product status parts: V47ZA7P, V47ZA7PX1347, V47ZA7PX2855, V47ZC7P, or V47ZC7PX2855. All maintain identical specifications and ROHS3 compliance. Selection may be based on packaging preference, inventory availability, or existing supplier relationships.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance certification, ensuring compatibility with environmental and regulatory requirements equivalent to the original V47ZA7 component.

Q: What is the operating temperature range for all substitute parts? A: All substitute parts operate across the identical temperature range of -55°C to 85°C, maintaining performance specifications throughout this full range.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message