V47ZS3 Equivalent & Substitute Parts

Part Overview

The V47ZS3 is a 47 V, 500 A Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc 10mm package. This component is classified as obsolete, though 971 pieces remain in stock as new original inventory. The V47ZS3 series provides transient voltage suppression across a single circuit with energy absorption capability of 4.5 J and operates across the temperature range of -55°C to 85°C. Due to its obsolete status, equivalent substitute parts from active product lines are available to ensure design continuity and supply chain reliability.

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 Absorption	4.5 J
Maximum AC Voltage	30 V
Maximum DC Voltage	38 V
Capacitance @ 1 MHz	2590 pF
Operating Temperature Range	-55°C to 85°C
Number of Circuits	1
Mounting Type	Through Hole
Package / Case	Disc 10mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the V47ZS3 is determined by strict equivalence across all electrical and mechanical parameters. The substitute parts maintain identical specifications for varistor voltage (42.3 V minimum to 51.7 V maximum, 47 V typical), surge current rating (500 A), energy absorption (4.5 J), maximum AC/DC voltage ratings, capacitance, operating temperature range, circuit count, and package form factor (through-hole disc 10mm).

The substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Packaging Variant): V47ZS3P differs from the main part only in packaging format, transitioning from bulk to tape and reel (TR) configuration while maintaining identical electrical performance and active product status.

Parametric Equivalents (Series Variants): V47ZS3PX1347, V47ZS3PX2855, V47ZT3P, V47ZT3PX2855, V47ZU3P, and V47ZU3PX2855 represent alternative series designations (ZS, ZT, ZU) within the Littelfuse varistor portfolio. These parts maintain complete electrical and mechanical parameter equivalence, including varistor voltage range, surge current, energy rating, temperature range, and disc 10mm package configuration. All substitute parts carry active product status and ROHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Packaging	Varistor Voltage (Typ)	Surge Current	Energy	Max AC / DC Volts	Operating Temp	Package	RoHS Status	Inventory
V47ZS3	Littelfuse Inc.	ZS	Obsolete	Bulk	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	971 Pcs
V47ZS3P	Littelfuse Inc.	ZS	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	791 Pcs
V47ZS3PX1347	Littelfuse Inc.	ZS	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	983 Pcs
V47ZS3PX2855	Littelfuse Inc.	ZS	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	813 Pcs
V47ZT3P	Littelfuse Inc.	ZT	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	878 Pcs
V47ZT3PX2855	Littelfuse Inc.	ZT	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	658 Pcs
V47ZU3P	Littelfuse Inc.	ZU	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	663 Pcs
V47ZU3PX2855	Littelfuse Inc.	ZU	Active	Tape & Reel (TR)	47 V	500 A	4.5 J	30 V / 38 V	-55°C to 85°C	Disc 10mm	ROHS3 Compliant	1040 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain complete electrical and mechanical equivalence to the V47ZS3. The primary distinction is product status: the V47ZS3 is obsolete, while all substitute parts carry active product status from Littelfuse Inc., ensuring ongoing availability and manufacturing support.

For new designs or production requiring long-term supply assurance, selection from the active substitute parts is appropriate. V47ZS3P represents the direct equivalent with identical series designation (ZS) and differs only in packaging format (tape and reel versus bulk). The parametric equivalents V47ZS3PX1347, V47ZS3PX2855, V47ZT3P, V47ZT3PX2855, V47ZU3P, and V47ZU3PX2855 provide alternative series options (ZT and ZU) while maintaining full electrical and mechanical compatibility.

All substitute parts comply with ROHS3 regulations and carry moisture sensitivity level 1 (unlimited), matching the compliance profile of the original V47ZS3. Inventory availability ranges from 658 to 1040 pieces across the substitute options, supporting both prototype and production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can V47ZS3P be used as a direct replacement for V47ZS3?

A: Yes. V47ZS3P is electrically and mechanically identical to V47ZS3. The only difference is packaging format: V47ZS3 is supplied in bulk configuration, while V47ZS3P is supplied in tape and reel (TR) format. Both maintain the same 47 V varistor voltage, 500 A surge current, 4.5 J energy rating, and disc 10mm package form factor.

Q: What is the difference between the ZS, ZT, and ZU series variants?

A: The ZS, ZT, and ZU designations represent different series within the Littelfuse varistor portfolio. All variants listed maintain identical electrical parameters (47 V 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). Series designation does not affect functional equivalence for the parameters specified.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts, including V47ZS3P, V47ZS3PX1347, V47ZS3PX2855, V47ZT3P, V47ZT3PX2855, V47ZU3P, and V47ZU3PX2855, carry ROHS3 compliance certification matching the original V47ZS3.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the main part and all substitutes, carry moisture sensitivity level 1 (unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use tape and reel packaged parts in place of bulk packaged parts?

A: Yes, from an electrical and mechanical standpoint. Tape and reel packaging is standard for automated assembly processes. If your assembly process uses manual insertion or bulk component handling, packaging format may affect logistics and assembly workflow, but the components themselves are functionally identical.

Q: Which substitute part should I select for new production?

A: Selection depends on your specific requirements. V47ZS3P is the direct series equivalent with active status. The ZT and ZU series variants (V47ZT3P, V47ZT3PX2855, V47ZU3P, V47ZU3PX2855) are equally valid from an electrical and mechanical perspective. All carry active product status and full inventory availability. Choose based on your assembly process requirements and supply chain preferences.

Q: Are there any temperature or voltage derating considerations between the main part and substitutes?

A: No. All parts maintain identical maximum AC voltage (30 V), maximum DC voltage (38 V), varistor voltage range (42.3 V to 51.7 V), and operating temperature range (-55°C to 85°C). Electrical performance and derating curves are equivalent across all listed parts.

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