1PMT12AT3 Transient Voltage Suppressor (TVS) Diode – Equivalent & Substitute Parts

Part Overview

The 1PMT12AT3 is a unidirectional Zener-type transient voltage suppressor manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 1000W peak pulse power rating in a DO-216AA (Powermite) package.

The 1PMT12AT3 is classified as obsolete. Equivalent and substitute TVS diodes from active product lines provide direct functional alternatives with maintained or improved electrical performance and compliance certifications.

Key Parameters

Parameter	Value
Voltage – Reverse Standoff (Typ)	12V
Voltage – Breakdown (Min)	13.3V
Voltage – Clamping (Max) @ Ipp	19.9V
Power – Peak Pulse	1000W (1kW)
Type	Zener
Unidirectional Channels	1
Package / Case	DO-216AA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)

Substitute Part Grouping Explanation

Substitution eligibility for the 1PMT12AT3 is determined by the following criteria:

Primary Matching Parameters:

Package / Case: DO-216AA (Powermite)
Mounting Type: Surface Mount
Type: Zener
Unidirectional Channels: 1
Power – Peak Pulse: 1000W (1kW) minimum
Applications: General Purpose

Voltage Compatibility Range:

Reverse Standoff Voltage: 10V to 17V (allows for circuit-specific protection levels)
Clamping Voltage: 18V to 29.2V (maintains transient suppression within acceptable limits)

Substitute parts from Microchip Technology (UPT series) meet all mechanical and electrical compatibility requirements. Parts are grouped by reverse standoff voltage rating to facilitate selection based on specific circuit protection requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage – Reverse Standoff (Typ)	Voltage – Breakdown (Min)	Voltage – Clamping (Max) @ Ipp	Current – Peak Pulse (10/1000µs)	Power – Peak Pulse	Package / Case	Operating Temperature	Product Status	RoHS Status
1PMT12AT3	onsemi	12V	13.3V	19.9V	—	1000W	DO-216AA	-55°C ~ 150°C	Obsolete	RoHS non-compliant
UPT10/TR13	Microchip Technology	10V	11V	18V	8.33A	1000W	DO-216AA	-65°C ~ 150°C	Active	RoHS non-compliant
UPT10/TR7	Microchip Technology	10V	11V	18V	8.33A	1000W	DO-216AA	-65°C ~ 150°C	Active	RoHS non-compliant
UPT10E3/TR13	Microchip Technology	10V	11V	18V	8.33A	1000W	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
UPT12E3/TR13	Microchip Technology	12V	13.8V	21.6V	6.94A	1000W	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
UPT12RE3/TR7	Microchip Technology	12V	13.8V	21.6V	6.94A	150W	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
UPT15/TR13	Microchip Technology	15V	16.7V	26V	5.77A	1000W	DO-216AA	-65°C ~ 150°C	Active	RoHS non-compliant
UPT15/TR7	Microchip Technology	15V	16.7V	26V	5.77A	1000W	DO-216AA	-65°C ~ 150°C	Active	RoHS non-compliant
UPT15E3/TR13	Microchip Technology	15V	16.7V	26V	5.77A	1000W	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
UPT15RE3/TR7	Microchip Technology	15V	16.7V	26V	5.77A	1000W	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
UPT17/TR13	Microchip Technology	17V	19V	29.2V	5.14A	1000W	DO-216AA	-65°C ~ 150°C	Active	RoHS non-compliant

Engineering Selection Recommendations

Primary Substitute (Voltage-Matched): UPT12E3/TR13 and UPT12RE3/TR7 provide the closest electrical match to the 1PMT12AT3, maintaining the 12V reverse standoff voltage specification. Both are active products with extended temperature range (-65°C to 150°C versus -55°C to 150°C). UPT12E3/TR13 is ROHS3 compliant and rated for 1000W peak pulse power. UPT12RE3/TR7 is also ROHS3 compliant but rated for 150W peak pulse power; this part is suitable only for applications where peak pulse power does not exceed 150W.

Alternative Substitutes (Lower Voltage Rating): UPT10E3/TR13 provides a lower reverse standoff voltage (10V) with ROHS3 compliance and 1000W peak pulse power rating. This part is suitable for circuits where 10V protection is acceptable and offers improved compliance status.

Alternative Substitutes (Higher Voltage Rating): UPT15E3/TR13 and UPT15RE3/TR7 provide higher reverse standoff voltage (15V) with ROHS3 compliance. UPT15E3/TR13 is rated for 1000W peak pulse power. These parts are suitable for circuits requiring higher voltage protection thresholds.

UPT17/TR13 provides the highest reverse standoff voltage (17V) with 1000W peak pulse power but is RoHS non-compliant.

Packaging Variants: Microchip UPT series parts are available in TR7 (7-inch reel) and TR13 (13-inch reel) tape and reel packaging. Selection between these variants is based on procurement and assembly requirements; electrical specifications are identical.

Frequently Asked Questions (FAQ)

Q: Can UPT10E3/TR13 be used as a direct replacement for 1PMT12AT3? A: UPT10E3/TR13 is mechanically and functionally compatible (same package, mounting type, power rating, and temperature range). However, the reverse standoff voltage is 10V versus 12V. This part is suitable only if the circuit design permits 10V protection instead of 12V. Verify circuit requirements before substitution.

Q: What is the difference between UPT12E3/TR13 and UPT12RE3/TR7? A: Both parts have identical voltage ratings (12V reverse standoff, 21.6V clamping) and are ROHS3 compliant. The primary difference is peak pulse power rating: UPT12E3/TR13 is rated for 1000W, while UPT12RE3/TR7 is rated for 150W. Additionally, TR13 and TR7 refer to tape reel sizes (13-inch and 7-inch respectively). Select based on circuit peak pulse power requirements and procurement reel size preferences.

Q: Are all substitute parts compatible with the original DO-216AA package footprint? A: Yes. All listed substitute parts use the DO-216AA (Powermite) package and are surface-mount compatible with the original 1PMT12AT3 footprint.

Q: What is the temperature range difference between 1PMT12AT3 and substitute parts? A: The 1PMT12AT3 operates from -55°C to 150°C. All Microchip UPT series substitutes operate from -65°C to 150°C, providing an extended lower temperature range.

Q: Which substitute offers the best compliance status? A: UPT12E3/TR13, UPT10E3/TR13, UPT15E3/TR13, and UPT15RE3/TR7 are all ROHS3 compliant. The 1PMT12AT3 is RoHS non-compliant. For applications requiring RoHS compliance, select from the ROHS3-compliant UPT variants.

Q: Can I use UPT15E3/TR13 in a circuit designed for 12V protection? A: UPT15E3/TR13 has a 15V reverse standoff voltage, which is higher than the original 12V specification. This part will not trigger protection until 15V is reached, making it unsuitable for circuits requiring 12V protection. Use only if circuit design permits higher voltage thresholds.

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