SM05T1 Equivalent & Substitute Parts

Part Overview

The SM05T1 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. It features a 5V reverse standoff voltage with a 9.8V maximum clamping voltage and 17A peak pulse current capability in an SOT-23-3 package. The SM05T1 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or comparable electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5V	V
Voltage - Breakdown (Min)	6.2V	V
Voltage - Clamping (Max) @ Ipp	9.8V	V
Current - Peak Pulse (8/20µs)	17A	A
Power - Peak Pulse	300W	W
Operating Temperature Range	-55°C to 150°C	°C (TJ)
Package / Case	SOT-23-3 (TO-236)	—
Mounting Type	Surface Mount	—
Unidirectional Channels	2	—

Substitute Part Grouping Explanation

Substitution of the SM05T1 is determined by strict equivalence in the following electrical and mechanical parameters:

Reverse standoff voltage: 5V nominal
Package type: SOT-23-3 (TO-236) surface mount
Unidirectional channel configuration: 2 channels
Mounting type: Surface mount
Operating temperature range: minimum -55°C to 150°C

Parts are grouped into two categories:

Direct Equivalents maintain identical clamping voltage (9.8V) and peak pulse current (17A) specifications. These parts are fully interchangeable without circuit redesign.

Functional Alternatives maintain the 5V reverse standoff voltage and SOT-23-3 package but may vary in clamping voltage or peak pulse current. These parts are suitable for applications where the specific clamping voltage and current ratings of the SM05T1 are not critical design constraints.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (8/20µs)	Power - Peak Pulse	Operating Temperature	Product Status	RoHS Status
SM05T1	onsemi	5V	6.2V	9.8V	17A	300W	-55°C to 150°C (TJ)	Obsolete	RoHS non-compliant
SM05T1G	onsemi	5V	6.2V	9.8V	17A	300W	-55°C to 150°C (TJ)	Active	ROHS3 Compliant
SM05-TP	Micro Commercial Co	5V (Max)	6.2V	9.8V	12A	300W	-55°C to 150°C (TJ)	Active	ROHS3 Compliant
SM05-7	Diodes Incorporated	5V	6.2V	20.6V	17A	300W	-55°C to 150°C (TJ)	Active	ROHS3 Compliant
SM05.TCT	UMW	5V	6V	15V	10A	150W	-55°C to 125°C (TJ)	Active	ROHS3 Compliant
SM05/TR7	Microsemi Corporation	5V	6V	9.8V	5A	300W	-55°C to 150°C (TJ)	Active	RoHS non-compliant
PESD5V0S2UAT,215	Nexperia USA Inc.	5V (Max)	6.4V	20V	15A	260W	-65°C to 150°C (TA)	Active	ROHS3 Compliant
PESD5V0X1BT,215	Nexperia USA Inc.	5V (Max)	5.8V	—	—	—	-55°C to 150°C (TA)	Active	ROHS3 Compliant
PJSOT05C-03_R1_00001	Panjit International Inc.	5V (Max)	6V	12.6V	21A	250W	-50°C to 150°C (TJ)	Active	ROHS3 Compliant

Engineering Selection Recommendations

SM05T1G (onsemi) is the primary direct equivalent. It maintains identical electrical specifications (5V standoff, 9.8V clamping, 17A peak pulse current) and is available in active production status with ROHS3 compliance. This part is the recommended replacement for the obsolete SM05T1 in new designs and production transitions.

SM05-TP (Micro Commercial Co) provides functional equivalence with matching clamping voltage (9.8V) and operating temperature range. Peak pulse current is reduced to 12A, making this suitable for applications where the full 17A capability is not required. ROHS3 compliance is available.

SM05-7 (Diodes Incorporated) maintains the 5V standoff voltage, 17A peak pulse current, and 300W power rating. The clamping voltage is elevated to 20.6V, suitable for applications requiring higher transient voltage suppression. AEC-Q101 automotive qualification is available.

SM05.TCT (UMW) is suitable for USB and general-purpose applications with reduced current requirements (10A) and lower power dissipation (150W). Operating temperature maximum is limited to 125°C. ROHS3 compliance is available.

SM05/TR7 (Microsemi Corporation) provides matching clamping voltage (9.8V) but with significantly reduced peak pulse current (5A). This part is suitable only for low-current transient suppression applications. RoHS compliance status is non-compliant.

PESD5V0S2UAT,215 (Nexperia USA Inc.) offers extended operating temperature range (-65°C to 150°C) with 20V clamping voltage and 15A peak pulse current. ROHS3 compliance is available. Suitable for applications requiring lower temperature operation.

PESD5V0X1BT,215 (Nexperia USA Inc.) is an automotive-grade part with AEC-Q101 qualification. Electrical specifications for clamping voltage and peak pulse current are not provided in the data. ROHS3 compliance is available.

PJSOT05C-03_R1_00001 (Panjit International Inc.) provides the highest peak pulse current (21A) among available substitutes with 12.6V clamping voltage. Operating temperature minimum is limited to -50°C. ROHS3 compliance is available.

Frequently Asked Questions (FAQ)

Q: Can SM05T1G be used as a direct replacement for SM05T1?

A: Yes. SM05T1G is the active production equivalent of the obsolete SM05T1, maintaining identical electrical specifications (5V reverse standoff, 9.8V clamping voltage, 17A peak pulse current) and the same SOT-23-3 package. The primary difference is ROHS3 compliance status.

Q: What is the difference between SM05-TP and SM05T1?

A: SM05-TP maintains the 9.8V clamping voltage and SOT-23-3 package but has a reduced peak pulse current rating of 12A compared to the SM05T1's 17A. Both parts share the 5V reverse standoff voltage and -55°C to 150°C operating temperature range. SM05-TP is suitable for applications where 12A peak pulse current is sufficient.

Q: Why does SM05-7 have a higher clamping voltage (20.6V) than SM05T1 (9.8V)?

A: SM05-7 is designed for applications requiring higher transient voltage suppression. While both parts maintain the 5V reverse standoff voltage and SOT-23-3 package, the elevated clamping voltage provides protection against larger transient events. Peak pulse current remains at 17A.

Q: Is PESD5V0X1BT,215 suitable for automotive applications?

A: Yes. PESD5V0X1BT,215 carries AEC-Q101 automotive qualification and is rated for -55°C to 150°C operating temperature. However, specific clamping voltage and peak pulse current values are not provided in the available data.

Q: Can SM05.TCT be used in high-current applications?

A: No. SM05.TCT is rated for 10A peak pulse current and 150W power dissipation, significantly lower than the SM05T1's 17A and 300W ratings. It is suitable for USB and general-purpose low-current transient suppression only.

Q: What is the temperature range difference between PESD5V0S2UAT,215 and SM05T1?

A: PESD5V0S2UAT,215 operates from -65°C to 150°C, extending the minimum operating temperature by 10°C compared to SM05T1's -55°C to 150°C range. This makes it suitable for applications requiring operation in colder environments.

Q: Are all substitute parts available in the same packaging as SM05T1?

A: All listed substitute parts use SOT-23-3 (TO-236) surface-mount packaging, maintaining mechanical compatibility with SM05T1 footprints. Packaging options (Cut Tape, Tape & Reel, Digi-Reel) vary by manufacturer and supplier.

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