V56ZU2P Equivalent & Substitute Parts

Part Overview

The V56ZU2P is a 56 V Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc., designed for through-hole mounting in a 7mm disc package. This component provides transient voltage protection with a surge current rating of 250 A and energy dissipation capacity of 2.3 J. The part is Active in product status and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified when packaging format differs while all electrical and mechanical parameters remain identical, enabling procurement flexibility across supply channels.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	56 V
Varistor Voltage Range	50.4 V (Min) – 61.6 V (Max)
Current - Surge	250 A
Energy Dissipation	2.3 J
Maximum AC Voltage	35 V
Maximum DC Voltage	45 V
Capacitance @ 1 MHz	1035 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the V56ZU2P are identified based on electrical parameter equivalence and mechanical compatibility. The substitution criteria are strictly limited to the following parameters:

Varistor Voltage (Minimum, Typical, Maximum)
Current - Surge rating
Energy dissipation capacity
Maximum AC and DC voltage ratings
Capacitance at specified frequency
Operating temperature range
Mounting type and package dimensions
Number of circuits
Compliance certifications (RoHS3, REACH)
Moisture Sensitivity Level

The V56ZU2P is packaged in Tape & Reel (TR) format. Substitute parts V56ZS2P and V56ZT2P are packaged in Cut Tape (CT) format. All three parts share identical electrical specifications and mechanical dimensions, differing only in packaging and series designation. This distinction allows component selection based on procurement and assembly requirements without compromising electrical performance or reliability.

Parameter Comparison

Parameter	V56ZU2P (TR)	V56ZS2P (CT)	V56ZT2P (CT)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)
Varistor Voltage (Min)	50.4 V	50.4 V	50.4 V
Varistor Voltage (Typ)	56 V	56 V	56 V
Varistor Voltage (Max)	61.6 V	61.6 V	61.6 V
Current - Surge	250 A	250 A	250 A
Energy	2.3 J	2.3 J	2.3 J
Maximum AC Volts	35 V	35 V	35 V
Maximum DC Volts	45 V	45 V	45 V
Capacitance @ 1 MHz	1035 pF	1035 pF	1035 pF
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm
Number of Circuits	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)

Engineering Selection Recommendations

All three parts—V56ZU2P, V56ZS2P, and V56ZT2P—are Active products from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts is determined by packaging requirements and supply chain availability rather than performance characteristics.

V56ZU2P in Tape & Reel format is suitable for high-volume automated assembly operations where continuous reel feeding is required. V56ZS2P and V56ZT2P in Cut Tape format are appropriate for lower-volume applications, manual assembly processes, or situations where partial reel quantities are needed.

All three parts meet RoHS3 compliance and REACH requirements, ensuring regulatory compatibility across global markets. Moisture Sensitivity Level 1 (Unlimited) indicates no special storage or handling precautions are required.

Frequently Asked Questions (FAQ)

Q: Can V56ZS2P or V56ZT2P be used as direct replacements for V56ZU2P?

A: Yes. All three parts are electrically and mechanically identical. The only difference is packaging format: V56ZU2P uses Tape & Reel (TR) while V56ZS2P and V56ZT2P use Cut Tape (CT). Direct substitution is valid from an electrical and functional standpoint.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on a continuous reel suitable for automated pick-and-place assembly. Cut Tape packaging provides components on tape segments, typically used for manual assembly or lower-volume applications. Both formats contain identical components with the same electrical performance.

Q: Are there any thermal or electrical performance differences between these three part numbers?

A: No. All three parts have identical varistor voltage ratings (50.4 V minimum to 61.6 V maximum), surge current capacity (250 A), energy dissipation (2.3 J), and operating temperature range (-55°C to 85°C). Performance is equivalent across all three part numbers.

Q: Do all three parts meet the same compliance standards?

A: Yes. V56ZU2P, V56ZS2P, and V56ZT2P are all ROHS3 compliant and REACH unaffected. Moisture Sensitivity Level is 1 (Unlimited) for all three parts, indicating no special storage requirements.

Q: Which part should be selected for high-volume production?

A: V56ZU2P in Tape & Reel format is optimized for high-volume automated assembly. V56ZS2P and V56ZT2P in Cut Tape format are better suited for lower-volume or manual assembly scenarios.

Q: Can these parts be used interchangeably in the same circuit design?

A: Yes. Since all electrical parameters, mechanical dimensions, and compliance certifications are identical, these parts can be used interchangeably without circuit redesign or re-qualification.

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