V47ZC3 Equivalent & Substitute Parts

Part Overview

The V47ZC3 is a 47V 500A varistor in a through-hole disc 10mm package, manufactured by Littelfuse Inc. as part of the ZC series. This component is classified as a Transient Voltage Suppressor (TVS) and is currently listed as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for ongoing system maintenance, repair, and component sourcing. The V47ZC3P represents the active production equivalent with identical electrical and mechanical specifications.

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 Rating	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
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 V47ZC3 is determined by strict equivalence across the following critical parameters:

Varistor Voltage (Typical): 47 V nominal rating
Varistor Voltage Tolerance: 42.3 V minimum to 51.7 V maximum
Surge Current Rating: 500 A
Energy Dissipation: 4.5 J
Maximum AC/DC Voltage Ratings: 30 V AC / 38 V DC
Capacitance: 2590 pF @ 1 MHz
Operating Temperature Range: -55°C to +85°C
Package Geometry: Through-hole disc 10mm form factor
Regulatory Compliance: ROHS3 Compliant, MSL 1

The V47ZC3P is a direct functional equivalent manufactured by Littelfuse Inc. under the same ZC series. It maintains identical electrical performance and mechanical compatibility while offering active production status and improved availability.

Parameter Comparison

Parameter	V47ZC3 (Obsolete)	V47ZC3P (Active)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.
Series	ZC	ZC
Product Status	Obsolete	Active
Varistor Voltage (Typ)	47 V	47 V
Varistor Voltage (Min)	42.3 V	42.3 V
Varistor Voltage (Max)	51.7 V	51.7 V
Current - Surge	500 A	500 A
Energy	4.5 J	4.5 J
Maximum AC Volts	30 V	30 V
Maximum DC Volts	38 V	38 V
Capacitance @ 1 MHz	2590 pF	2590 pF
Operating Temperature	-55°C to +85°C	-55°C to +85°C
Number of Circuits	1	1
Mounting Type	Through Hole	Through Hole
Package / Case	Disc 10mm	Disc 10mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Packaging	Not specified	Bulk

Engineering Selection Recommendations

The V47ZC3P is the direct replacement for the obsolete V47ZC3. Both components are manufactured by Littelfuse Inc. and maintain identical electrical specifications, voltage ratings, surge current capacity, and thermal operating range. The V47ZC3P carries active product status, ensuring continued availability and manufacturing support.

Both parts meet ROHS3 compliance requirements and carry MSL 1 rating, indicating no moisture sensitivity constraints during storage and handling. The through-hole disc 10mm package geometry is identical, permitting direct board-level substitution without PCB redesign.

Selection between these parts is determined by availability and procurement requirements. The V47ZC3P is recommended for new designs and ongoing production due to its active status. The V47ZC3 may be encountered in legacy inventory or field repair scenarios, where the V47ZC3P provides functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the V47ZC3P replace the V47ZC3 in existing applications?

A: Yes. The V47ZC3P is electrically and mechanically identical to the V47ZC3. All voltage ratings, surge current capacity, energy dissipation, capacitance, and temperature specifications are equivalent. The through-hole disc 10mm package permits direct substitution without circuit modification.

Q: Why is the V47ZC3 listed as obsolete?

A: The V47ZC3 has been discontinued by Littelfuse Inc. The V47ZC3P represents the active production continuation of this product line with identical specifications.

Q: Are there packaging differences between V47ZC3 and V47ZC3P?

A: The electrical and mechanical specifications are identical. The V47ZC3P is supplied in bulk packaging, while the V47ZC3 packaging specification was not provided. This difference does not affect component performance or board-level compatibility.

Q: What compliance certifications apply to both parts?

A: Both the V47ZC3 and V47ZC3P are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. Both are classified under ECCN EAR99 and HTSUS 8533.40.4000.

Q: Can these varistors be used in AC and DC circuits?

A: Yes. Both parts are rated for maximum AC voltage of 30 V and maximum DC voltage of 38 V, permitting use in both AC and DC transient suppression applications within these voltage limits.

Q: What is the operating temperature range for these components?

A: Both the V47ZC3 and V47ZC3P operate across -55°C to +85°C ambient temperature range, suitable for industrial and commercial applications.

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