1PMT5.0AT3 Equivalent & Substitute Parts

Part Overview

The 1PMT5.0AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface mount applications. This component features a 5V reverse standoff voltage with a 9.2V maximum clamping voltage and 1000W peak pulse power rating in a DO-216AA package. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	1PMT5.0AT3
Manufacturer	onsemi
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	5V
Voltage - Breakdown (Min)	6.4V
Voltage - Clamping (Max) @ Ipp	9.2V
Power - Peak Pulse	1000W (1kW)
Package / Case	DO-216AA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 1PMT5.0AT3 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - Reverse Standoff (Typ): 5V
Voltage - Clamping (Max) @ Ipp: 9.2V
Package / Case: DO-216AA
Mounting Type: Surface Mount
Unidirectional Channels: 1

Substitution Categories:

Upgrade Substitute (Direct Replacement): The SM2T6V8A from STMicroelectronics matches all primary electrical specifications (5V standoff, 9.2V clamping) and package requirements. This part is active and RoHS3 compliant, providing improved regulatory compliance over the obsolete 1PMT5.0AT3.

Similar Substitutes (Voltage-Elevated Alternatives): Parts from Microchip Technology (UPT10, UPT15, UPT17 series) share the DO-216AA package and 1000W power rating but operate at higher voltage ratings (10V, 15V, and 17V standoff respectively). These are suitable only when circuit design permits higher clamping voltages.

Parameter Comparison

Parameter	1PMT5.0AT3 (Main)	SM2T6V8A (Upgrade)	UPT10/TR13	UPT15/TR13	UPT17/TR13
Manufacturer	onsemi	STMicroelectronics	Microchip Technology	Microchip Technology	Microchip Technology
Voltage - Reverse Standoff (Typ)	5V	5V	10V	15V	17V
Voltage - Breakdown (Min)	6.4V	6.4V	11V	16.7V	19V
Voltage - Clamping (Max) @ Ipp	9.2V	9.2V	18V	26V	29.2V
Current - Peak Pulse (10/1000µs)	—	19.6A	8.33A	5.77A	5.14A
Power - Peak Pulse	1000W	200W	1000W	1000W	1000W
Package / Case	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA
Operating Temperature	-55°C ~ 150°C	—	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant (UPT15E3/TR13, UPT15RE3/TR7)

Engineering Selection Recommendations

For Direct Replacement (Recommended): Select SM2T6V8A when electrical specifications and package compatibility are the primary requirements. This part maintains identical voltage ratings (5V standoff, 9.2V clamping) and DO-216AA package footprint. The SM2T6V8A is active and ROHS3 compliant, providing regulatory advantage over the obsolete 1PMT5.0AT3. Note that peak pulse power is reduced to 200W compared to the original 1000W specification.

For Higher Voltage Applications: Microchip Technology UPT series parts (UPT10, UPT15, UPT17) are suitable only when circuit design accommodates elevated clamping voltages. These maintain the DO-216AA package and 1000W power rating. Select based on required standoff voltage: UPT10 for 10V applications, UPT15 for 15V applications, and UPT17 for 17V applications. RoHS3 compliant variants are available (UPT10E3/TR13, UPT15E3/TR13, UPT15RE3/TR7).

Compliance Considerations: If RoHS3 compliance is mandatory, SM2T6V8A or RoHS3-compliant Microchip variants (UPT10E3/TR13, UPT15E3/TR13, UPT15RE3/TR7) are required. Non-compliant alternatives remain available for legacy applications.

Frequently Asked Questions (FAQ)

Q: Can SM2T6V8A be used as a direct drop-in replacement for 1PMT5.0AT3? A: SM2T6V8A matches the critical electrical parameters (5V standoff, 9.2V clamping) and DO-216AA package. However, peak pulse power is reduced from 1000W to 200W. Verify that your circuit design does not require the full 1000W pulse capability before substitution.

Q: Why do UPT series parts have higher clamping voltages? A: UPT10, UPT15, and UPT17 are designed for higher voltage protection circuits. The 10V, 15V, and 17V standoff ratings make them unsuitable for 5V circuits unless the design specifically requires higher clamping thresholds.

Q: What is the difference between UPT/TR13 and UPT/TR7 packaging? A: Both variants use identical electrical specifications and DO-216AA package. The TR13 and TR7 designations refer to different tape and reel configurations for automated assembly. Electrical performance and footprint compatibility are identical.

Q: Are there RoHS3 compliant options available? A: Yes. SM2T6V8A is ROHS3 compliant. For Microchip alternatives, UPT10E3/TR13, UPT15E3/TR13, and UPT15RE3/TR7 are ROHS3 compliant. Non-compliant variants remain available for legacy applications.

Q: Does operating temperature range affect substitution? A: The 1PMT5.0AT3 operates from -55°C to 150°C. Microchip UPT series parts extend the lower limit to -65°C. SM2T6V8A operating temperature is not specified in available data. Verify temperature requirements for your specific application.

Q: Can I use a higher voltage TVS diode in a 5V circuit? A: No. Using UPT10, UPT15, or UPT17 in a 5V circuit will not provide adequate protection because their higher standoff voltages prevent activation at 5V transients. Use only parts with 5V standoff rating for 5V protection circuits.

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