V131NA34 Equivalent & Substitute Parts

Part Overview

The V131NA34 is a 200 V, 40 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc., designed for surface mount applications in a square 34mm package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The varistor provides transient voltage suppression across a single circuit with energy absorption capability of 270 J, suitable for protecting sensitive electronic equipment from voltage spikes and transient events.

Key Parameters

Parameter	Value	Unit
Varistor Voltage (Typical)	200	V
Current - Surge	40	kA
Energy Absorption	270	J
Maximum AC Volts	130	V
Maximum DC Volts	175	V
Operating Temperature Range	-55 to 85	°C
Number of Circuits	1	—
Capacitance @ 1 MHz	10000	pF
Package Type	Square 34mm	—

Substitute Part Grouping Explanation

Substitution of the V131NA34 is determined by strict equivalence across the following critical parameters:

Varistor voltage range (minimum, typical, and maximum values within acceptable tolerance)
Surge current rating (40 kA minimum requirement)
Energy absorption capacity (270 J minimum)
Maximum AC and DC voltage ratings
Operating temperature range (-55°C to 85°C)
Single circuit configuration
Square 34mm package geometry
RoHS3 compliance and MSL rating

The V131DHB34 qualifies as a manufacturer-recommended substitute based on matching all critical electrical parameters within specified tolerances. The primary distinction is the mounting technology: the V131NA34 uses surface mount technology, while the V131DHB34 employs through-hole mounting with tabs. This difference requires circuit board redesign and assembly process modification.

Parameter Comparison

Parameter	V131NA34	V131DHB34	Match Status
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Identical
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Identical
Varistor Voltage (Min)	184 V	184.5 V	Within tolerance
Varistor Voltage (Typ)	200 V	205 V	Within tolerance
Varistor Voltage (Max)	228 V	225.5 V	Within tolerance
Current - Surge	40 kA	40 kA	Identical
Energy	270 J	270 J	Identical
Number of Circuits	1	1	Identical
Capacitance @ 1 MHz	10000 pF	10000 pF	Identical
Maximum AC Volts	130 V	130 V	Identical
Maximum DC Volts	175 V	175 V	Identical
Operating Temperature	-55 to 85°C	-55 to 85°C	Identical
Package / Case	Square 34mm	Square 34mm, Tabs	Geometry equivalent, mounting differs
Mounting Type	Surface Mount	Through Hole	Different
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The V131DHB34 is the manufacturer-recommended equivalent for the obsolete V131NA34. Both components meet identical electrical specifications for varistor voltage, surge current capacity, energy absorption, and thermal operating range. Both maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) ratings.

Selection of the V131DHB34 requires circuit board redesign to accommodate through-hole mounting with tabs in place of surface mount technology. This substitution is appropriate for applications where board layout modification is feasible and where the through-hole mounting method is compatible with existing assembly processes.

For applications where surface mount technology must be retained, alternative surface mount varistors with equivalent electrical parameters from the Littelfuse NA series or competing manufacturers meeting the specified 200 V typical varistor voltage, 40 kA surge current, and 270 J energy absorption requirements should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the V131DHB34 be used as a direct replacement for the V131NA34 without circuit board modification?

A: No. The V131NA34 is surface mount, while the V131DHB34 is through-hole with tabs. Circuit board redesign is required to accommodate the different mounting technology and pad configuration.

Q: Are the electrical characteristics of both parts identical?

A: The electrical characteristics are equivalent within acceptable engineering tolerances. The V131DHB34 has a typical varistor voltage of 205 V compared to 200 V for the V131NA34, with both operating within the same maximum AC (130 V) and DC (175 V) voltage limits and identical 40 kA surge current and 270 J energy ratings.

Q: What is the significance of the V131NA34 being obsolete?

A: Obsolete status indicates the part is no longer manufactured. The V131DHB34, classified as active, represents the current production equivalent and is available for new designs and ongoing system support.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the V131NA34 and V131DHB34 are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings, suitable for standard storage and handling conditions.

Q: What is the package geometry difference between these parts?

A: Both use a square 34mm package. The V131NA34 has surface mount pads, while the V131DHB34 includes tabs for through-hole insertion and soldering.

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