MMBTA92 Equivalent & Substitute Parts

Part Overview

The MMBTA92 is an active PNP bipolar junction transistor (BJT) manufactured by Diotec Semiconductor in SOT-23-3 surface mount packaging. This component operates at 300 V collector-emitter breakdown voltage with a maximum collector current of 500 mA and 250 mW power dissipation. The MMBTA92 is suitable for general-purpose switching and amplification applications requiring PNP transistor functionality in compact surface mount form factors. Substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	300	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	250	mW
Frequency - Transition	50	MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 2mA, 20mA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 10mA, 10V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the MMBTA92 are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

Transistor type: PNP configuration
Voltage rating: 300 V collector-emitter breakdown (minimum)
Current rating: 500 mA collector current (minimum)
Power dissipation: 250 mW or greater
Frequency response: 50 MHz transition frequency (minimum)
Saturation voltage: 500 mV @ 2mA, 20mA
Operating temperature range: -55°C to 150°C

Mechanical Compatibility Criteria:

Package type: SOT-23-3 (TO-236) surface mount
Pin configuration: Three-pin configuration matching SOT-23-3 standard

The substitute parts MMBTA92LT1G and SMMBTA92LT3G meet or exceed all specified electrical parameters. Both are manufactured by onsemi and maintain identical voltage, current, and frequency ratings. The SMMBTA92LT3G includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel packaging, while MMBTA92LT1G is available in Cut Tape & Digi-Reel packaging.

Parameter Comparison

Parameter	MMBTA92 (Diotec)	MMBTA92LT1G (onsemi)	SMMBTA92LT3G (onsemi)
Transistor Type	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	300 V	300 V	300 V
Current - Collector (Ic) (Max)	500 mA	500 mA	500 mA
Power - Max	250 mW	300 mW	300 mW
Frequency - Transition	50 MHz	50 MHz	50 MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 2mA, 20mA	500mV @ 2mA, 20mA	500mV @ 2mA, 20mA
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active
RoHS Status	Not applicable	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	AEC-Q101

Engineering Selection Recommendations

MMBTA92LT1G (onsemi) is a direct electrical and mechanical substitute for the MMBTA92. This part maintains identical voltage, current, and frequency specifications while offering increased power dissipation (300 mW versus 250 mW). The MMBTA92LT1G is ROHS3 compliant and available in Cut Tape & Digi-Reel packaging, matching standard distribution formats. This substitute is suitable for applications requiring standard commercial-grade components.

SMMBTA92LT3G (onsemi) is an automotive-qualified variant of the MMBTA92LT1G, certified to AEC-Q101 standards. This part is electrically identical to MMBTA92LT1G and maintains all specified parameters. The SMMBTA92LT3G is supplied in Tape & Reel packaging and is appropriate for automotive applications or designs requiring automotive-grade component qualification. Both onsemi substitutes are active products with established supply chains.

Selection between MMBTA92LT1G and SMMBTA92LT3G depends on application requirements: use MMBTA92LT1G for general commercial applications and SMMBTA92LT3G for automotive or mission-critical applications requiring AEC-Q101 qualification.

Frequently Asked Questions (FAQ)

Q: Can MMBTA92LT1G be used as a direct replacement for MMBTA92?

A: Yes. The MMBTA92LT1G meets or exceeds all electrical parameters of the MMBTA92, including voltage rating (300 V), collector current (500 mA), saturation voltage, and frequency response. Both components use identical SOT-23-3 packaging and pin configuration. The MMBTA92LT1G offers higher power dissipation (300 mW versus 250 mW), providing additional thermal margin.

Q: What is the difference between MMBTA92LT1G and SMMBTA92LT3G?

A: Both parts are electrically identical and meet the same electrical specifications. The primary difference is automotive qualification: SMMBTA92LT3G is certified to AEC-Q101 automotive standards, while MMBTA92LT1G is a standard commercial-grade component. SMMBTA92LT3G is supplied in Tape & Reel packaging, while MMBTA92LT1G is available in Cut Tape & Digi-Reel formats.

Q: Are these substitutes compatible with existing PCB layouts designed for MMBTA92?

A: Yes. All substitute parts use the SOT-23-3 (TO-236) package with identical pin configuration and footprint. No PCB layout modifications are required for component substitution.

Q: What compliance certifications apply to these substitute parts?

A: MMBTA92LT1G and SMMBTA92LT3G are both ROHS3 compliant. SMMBTA92LT3G additionally carries AEC-Q101 automotive qualification. All parts are classified under ECCN EAR99 and HTSUS 8541.21.0095.

Q: Can SMMBTA92LT3G be used in non-automotive applications?

A: Yes. SMMBTA92LT3G meets all electrical and mechanical specifications for general-purpose applications. Automotive qualification does not restrict use in non-automotive designs; it indicates the part has undergone additional qualification testing and is suitable for automotive environments.

Q: What is the moisture sensitivity level (MSL) for these substitute parts?

A: MMBTA92LT1G and SMMBTA92LT3G both have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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