1PMT7.0AT3G Equivalent & Substitute Parts

Part Overview

The 1PMT7.0AT3G is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection applications. This unidirectional Zener diode features a 7V reverse standoff voltage with a 12V maximum clamping voltage and 1kW peak pulse power rating in a surface-mount Powermite package. The part is currently obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers for ongoing design support and procurement.

Key Parameters

Parameter	1PMT7.0AT3G
Manufacturer	onsemi
Type	Zener TVS Diode
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	7V
Voltage - Breakdown (Min)	7.78V
Voltage - Clamping (Max) @ Ipp	12V
Power - Peak Pulse	1000W (1kW)
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-216AA
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 1PMT7.0AT3G are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Package / Case: DO-216AA (Powermite form factor)
Mounting Type: Surface Mount
Type: Zener TVS Diode, Unidirectional
Power - Peak Pulse: 1000W (1kW)
Moisture Sensitivity Level: 1 (Unlimited)

Voltage Operating Range Consideration: The 1PMT7.0AT3G operates with a 7V reverse standoff and 12V clamping voltage. Substitute parts are grouped by their voltage ratings, which determine their suitability for specific circuit protection requirements. Parts with higher voltage ratings (10V, 12V, 15V standoff) provide protection at different threshold levels and are presented as alternatives based on application voltage requirements.

Packaging Variants: Microchip Technology UPT series parts are available in multiple tape-and-reel configurations (TR7, TR13) and RoHS compliance variants (standard, E3, RE3), all maintaining the same DO-216AA package and electrical performance within their respective voltage classes.

Parameter Comparison

Parameter	1PMT7.0AT3G	UPT10/TR13	UPT10/TR7	UPT10E3/TR13	UPT10RE3/TR7	UPT12/TR13	UPT12/TR7	UPT12E3/TR13	UPT12RE3/TR7	UPT15/TR13	UPT15/TR7
Manufacturer	onsemi	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip
Type	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Reverse Standoff (Typ)	7V	10V	10V	10V	10V	12V	12V	12V	12V	15V	15V
Voltage - Breakdown (Min)	7.78V	11V	11V	11V	11V	13.8V	13.8V	13.8V	13.8V	16.7V	16.7V
Voltage - Clamping (Max) @ Ipp	12V	18V	18V	18V	18V	21.6V	21.6V	21.6V	21.6V	26V	26V
Current - Peak Pulse (10/1000µs)	—	8.33A	8.33A	8.33A	8.33A	6.94A	6.94A	6.94A	6.94A	5.77A	5.77A
Power - Peak Pulse	1000W	1000W	1000W	1000W	1000W	1000W	1000W	1000W	150W	1000W	1000W
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA	DO-216AA
Moisture Sensitivity Level (MSL)	1	1	1	1	1	1	1	1	1	1	1
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	—	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	Non-compliant	Non-compliant

Engineering Selection Recommendations

For Direct Voltage Class Replacement (7V Protection): No exact 7V standoff equivalent exists in the active Microchip UPT series. The UPT10 series (10V standoff, 18V clamp) represents the nearest lower-voltage option but operates at a higher protection threshold. Selection of UPT10 variants requires circuit analysis to confirm compatibility with the higher clamping voltage.

For Higher Voltage Protection Requirements: The UPT12 series (12V standoff, 21.6V clamp) and UPT15 series (15V standoff, 26V clamp) provide protection at elevated voltage levels and are suitable for applications requiring higher transient suppression thresholds.

RoHS Compliance Consideration: Parts designated with E3 or RE3 suffixes (UPT10E3/TR13, UPT10RE3/TR7, UPT12E3/TR13, UPT12RE3/TR7, UPT15E3/TR13, UPT15RE3/TR7) are ROHS3 compliant. Standard UPT variants without these suffixes are RoHS non-compliant. Selection depends on regulatory requirements for the end application.

Packaging and Tape Configuration: TR7 and TR13 designations indicate different tape-and-reel configurations for automated assembly. Both maintain identical electrical performance and DO-216AA package dimensions. Selection is based on assembly equipment compatibility and procurement requirements.

Product Status: All Microchip UPT series alternatives are active products with established supply chains, providing long-term availability compared to the obsolete 1PMT7.0AT3G.

Frequently Asked Questions (FAQ)

Q: Can UPT10 series parts directly replace the 1PMT7.0AT3G? A: UPT10 parts share the same DO-216AA package and 1kW peak pulse power rating. However, the 10V standoff voltage is higher than the original 7V specification. Direct substitution is possible only if the circuit design accommodates the higher clamping voltage (18V vs. 12V). Circuit analysis is required to confirm compatibility.

Q: What is the difference between UPT10/TR7 and UPT10/TR13? A: Both parts are electrically identical with the same electrical specifications. The difference is in tape-and-reel configuration: TR7 and TR13 refer to different tape pitch and reel specifications used for automated component placement. Selection depends on your assembly equipment compatibility.

Q: Are E3 and RE3 variants functionally equivalent to standard UPT parts? A: Yes, E3 and RE3 variants are functionally equivalent to standard UPT parts with identical electrical performance. The primary difference is RoHS compliance status: E3 and RE3 variants are ROHS3 compliant, while standard variants are RoHS non-compliant. Select based on your regulatory requirements.

Q: Why does UPT12RE3/TR7 show 150W peak pulse power instead of 1000W? A: This is a data variance in the provided specifications. All UPT series parts in the DO-216AA Powermite package are rated for 1000W peak pulse power. Confirm specifications with the manufacturer datasheet for final design validation.

Q: Can I use UPT15 series for a 7V protection circuit? A: UPT15 parts have a 15V standoff voltage and 26V clamping voltage, significantly higher than the original 7V/12V specification. These are suitable only for circuits designed for higher voltage transient protection. Using UPT15 in a 7V circuit would provide inadequate protection at the intended voltage level.

Q: What is the operating temperature range difference? A: The 1PMT7.0AT3G operates from -55°C to 150°C, while all Microchip UPT alternatives operate from -65°C to 150°C. The UPT series provides a wider low-temperature operating range, which may be beneficial for applications in extreme cold environments.

Q: Are all substitute parts available in the same DO-216AA package? A: Yes, all listed Microchip UPT series alternatives use the DO-216AA package (Powermite form factor), ensuring mechanical and thermal compatibility with the original 1PMT7.0AT3G footprint.

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