V33MLA1206T Equivalent & Substitute Parts

Part Overview

The V33MLA1206T is a 44.6 V varistor rated for 180 A surge current in a 1206 surface mount package, manufactured by Littelfuse Inc. as part of the MLA series. This component is classified as a Transient Voltage Suppressor (TVS) and is currently listed as obsolete. Due to its obsolete status, equivalent substitute parts with identical electrical and mechanical specifications are available from the same manufacturer in active production, ensuring continued availability for new designs and replacement applications.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	44.6 V
Current - Surge	180 A
Maximum DC Volts	33 V
Maximum AC Volts	26 V
Energy	0.8 J
Capacitance @ 1 MHz	500 pF
Operating Temperature Range	-40°C to 125°C
Package / Case	1206 (3216 Metric)
Number of Circuits	1

Substitute Part Grouping Explanation

Substitution of the V33MLA1206T is determined by strict equivalence across all electrical and mechanical parameters. The substitute parts V33MLA1206NT and V33MLA1206NH maintain identical specifications for varistor voltage range (38 V minimum to 49 V maximum, 44.6 V typical), surge current rating (180 A), DC and AC voltage ratings, energy dissipation (0.8 J), capacitance characteristics, operating temperature range, and package configuration (1206 surface mount). The primary distinction between substitute parts lies in packaging format: V33MLA1206NT is supplied in Tape & Reel (TR) format, while V33MLA1206NH is supplied in Cut Tape (CT) & Digi-Reel® format. Both substitute parts are in active production status, ensuring long-term availability.

Parameter Comparison

Parameter	V33MLA1206T (Main)	V33MLA1206NT (Substitute)	V33MLA1206NH (Substitute)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)
Series	MLA	MLA	MLA
Varistor Voltage (Min)	38 V	38 V	38 V
Varistor Voltage (Typ)	44.6 V	44.6 V	44.6 V
Varistor Voltage (Max)	49 V	49 V	49 V
Current - Surge	180 A	180 A	180 A
Maximum DC Volts	33 V	33 V	33 V
Maximum AC Volts	26 V	26 V	26 V
Energy	0.8 J	0.8 J	0.8 J
Capacitance @ 1 MHz	500 pF	500 pF	500 pF
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Mounting Type	Surface Mount, MLCV	Surface Mount, MLCV	Surface Mount, MLCV
Number of Circuits	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active
Packaging Format	Not specified	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

The V33MLA1206T is obsolete and should be replaced with either V33MLA1206NT or V33MLA1206NH for new designs and ongoing production. Both substitute parts are manufactured by Littelfuse Inc. and maintain full electrical and mechanical equivalence to the original part. Selection between the two substitutes depends on procurement and assembly requirements: V33MLA1206NT in Tape & Reel format is suitable for high-volume automated assembly operations, while V33MLA1206NH in Cut Tape & Digi-Reel® format accommodates lower-volume or mixed-component assembly workflows. Both parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling. The active production status of both substitutes ensures long-term component availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can V33MLA1206NT and V33MLA1206NH be used interchangeably with V33MLA1206T?

A: Yes. Both substitute parts are electrically and mechanically identical to V33MLA1206T across all specified parameters, including varistor voltage range, surge current rating, voltage ratings, energy dissipation, capacitance, operating temperature, and 1206 package configuration. The only difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel®), which does not affect component performance or PCB assembly compatibility.

Q: What is the difference between V33MLA1206NT and V33MLA1206NH?

A: Both parts are electrically identical. The difference is in packaging format: V33MLA1206NT is supplied in Tape & Reel (TR) format for automated high-volume assembly, while V33MLA1206NH is supplied in Cut Tape (CT) & Digi-Reel® format for manual or lower-volume assembly operations. Selection depends on your assembly process requirements.

Q: Why is V33MLA1206T listed as obsolete?

A: The V33MLA1206T has been superseded by active production equivalents. Littelfuse Inc. continues to manufacture the same varistor specifications under part numbers V33MLA1206NT and V33MLA1206NH, ensuring continued availability of this 44.6 V, 180 A varistor in the 1206 package.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: No. All three parts carry identical RoHS3 compliance status and MSL rating of 1 (Unlimited). Both substitute parts also carry REACH Unaffected status, confirming full regulatory equivalence.

Q: Can I use these parts in designs requiring -40°C to 125°C operation?

A: Yes. All three parts, including both substitutes, are rated for the full -40°C to 125°C operating temperature range.

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