Littelfuse V47ZA3 Equivalent & Substitute Parts

Part Overview

The Littelfuse V47ZA3 is a 47 V, 500 A transient voltage suppressor varistor in a through-hole disc 10mm package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer series, enabling direct replacement in applications requiring transient voltage protection.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	47 V
Varistor Voltage Range	42.3 V (Min) – 51.7 V (Max)
Current - Surge	500 A
Energy	4.5 J
Maximum AC Volts	30 V
Maximum DC Volts	38 V
Capacitance @ 1 MHz	2590 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 10mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the obsolete V47ZA3 is determined by strict equivalence across all electrical and mechanical parameters. The following criteria define valid substitutes:

Varistor voltage range: 42.3 V (Min) to 51.7 V (Max)
Surge current rating: 500 A
Energy dissipation: 4.5 J
Maximum AC/DC voltage ratings: 30 V AC, 38 V DC
Capacitance at 1 MHz: 2590 pF
Operating temperature: -55°C to 85°C
Package: Through-hole disc 10mm
Single circuit configuration
RoHS3 compliance

All substitute parts listed maintain these specifications. Differences in product status (active vs. obsolete) and packaging format (bulk vs. tape) do not affect electrical or mechanical compatibility. Series designation (ZA vs. ZC) represents internal manufacturing variants with identical performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Varistor Voltage (Typ)	Surge Current	Energy	Package	Inventory
V47ZA3	Littelfuse	ZA	Obsolete	47 V	500 A	4.5 J	Disc 10mm	805 Pcs
V47ZA3P	Littelfuse Inc.	ZA	Active	47 V	500 A	4.5 J	Disc 10mm	17935 Pcs
V47ZA3PX1347	Littelfuse Inc.	ZA	Active	47 V	500 A	4.5 J	Disc 10mm	1077 Pcs
V47ZA3PX2855	Littelfuse	ZA	Active	47 V	500 A	4.5 J	Disc 10mm	1170 Pcs
V47ZC3P	Littelfuse Inc.	ZC	Active	47 V	500 A	4.5 J	Disc 10mm	1123 Pcs
V47ZC3PX2855	Littelfuse Inc.	ZC	Active	47 V	500 A	4.5 J	Disc 10mm	990 Pcs

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications. The V47ZA3P offers the highest inventory availability (17935 pcs) among active alternatives, providing supply chain stability for volume requirements. Parts designated with suffix codes (PX1347, PX2855) represent specific manufacturing lot or packaging configurations but maintain identical electrical performance and mechanical compatibility.

Selection between ZA and ZC series variants is based on internal manufacturing process; both series deliver equivalent transient voltage suppression performance. Packaging format differences (bulk vs. tape) affect procurement and assembly processes but do not influence component functionality or substitutability.

Frequently Asked Questions (FAQ)

Q: Can V47ZA3P directly replace the obsolete V47ZA3? A: Yes. The V47ZA3P maintains all electrical parameters (47 V typical varistor voltage, 500 A surge current, 4.5 J energy) and mechanical specifications (through-hole disc 10mm package, -55°C to 85°C operating range). The primary difference is product status (active vs. obsolete) and packaging format (bulk).

Q: What is the difference between ZA and ZC series variants? A: ZA and ZC designations represent different manufacturing series within the Littelfuse varistor product line. Both series deliver identical electrical and mechanical performance for the 47 V, 500 A specification. Selection between series is based on availability and procurement preference.

Q: Are the PX suffix variants (PX1347, PX2855) functionally equivalent? A: Yes. Suffix codes indicate specific manufacturing lot tracking or packaging configurations. All variants maintain the same electrical specifications and mechanical form factor, ensuring full interchangeability in circuit applications.

Q: Does packaging format (bulk vs. tape) affect compatibility? A: No. Packaging format affects procurement and assembly handling only. The electrical and mechanical properties of the component remain identical regardless of packaging presentation.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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