MSB92T1 Equivalent & Substitute Parts

Part Overview

The MSB92T1 is a PNP bipolar junction transistor manufactured by onsemi, rated for 300 V collector-emitter breakdown voltage and 150 mA maximum collector current in a surface mount SC-59 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MSB92T1 operates at a transition frequency of 50 MHz with a maximum power dissipation of 150 mW and is suitable for general-purpose switching and amplification applications in surface mount designs.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	300	V
Current - Collector (Ic) (Max)	150	mA
Power - Max	150	mW
Frequency - Transition	50	MHz
Vce Saturation (Max) @ Ib, Ic	500 mV @ 2 mA, 20 mA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	25 @ 30 mA, 10 V	—
Current - Collector Cutoff (Max)	250	nA
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the MSB92T1 is determined by electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

Transistor Type: PNP configuration required
Voltage - Collector Emitter Breakdown (Max): 300 V minimum
Current - Collector (Ic) (Max): 150 mA minimum
Package / Case: TO-236-3, SC-59, or SOT-23-3 compatible
Mounting Type: Surface Mount

Substitution Categories:

Direct Equivalent: MSB92T1G (onsemi) provides identical electrical specifications with active product status and RoHS3 compliance. This part maintains the same base product number (MSB92) and is packaged in Tape & Reel format.

Similar Substitutes with Enhanced Ratings: FMMTA92TA, FMMT597TA, and MMBTA92-7-F exceed the minimum electrical requirements of the MSB92T1 while maintaining package compatibility. These parts support higher collector current ratings (200–500 mA) and increased power dissipation (330–500 mW), allowing operation in applications requiring greater current handling or thermal margin. All three are active products with RoHS3 compliance and automotive-grade qualifications where applicable.

Parameter Comparison

Parameter	MSB92T1	MSB92T1G	FMMTA92TA	FMMT597TA	MMBTA92-7-F
Manufacturer	onsemi	onsemi	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Product Status	Obsolete	Active	Active	Active	Active
Transistor Type	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	300 V	300 V	300 V	300 V	300 V
Current - Collector (Ic) (Max)	150 mA	150 mA	200 mA	200 mA	500 mA
Power - Max	150 mW	150 mW	330 mW	500 mW	300 mW
Frequency - Transition	50 MHz	50 MHz	50 MHz	75 MHz	50 MHz
Vce Saturation (Max) @ Ib, Ic	500 mV @ 2 mA, 20 mA	500 mV @ 2 mA, 20 mA	500 mV @ 2 mA, 20 mA	250 mV @ 20 mA, 100 mA	500 mV @ 2 mA, 20 mA
DC Current Gain (hFE) (Min) @ Ic, Vce	25 @ 30 mA, 10 V	25 @ 30 mA, 10 V	25 @ 30 mA, 10 V	100 @ 50 mA, 10 V	25 @ 30 mA, 10 V
Current - Collector Cutoff (Max)	250 nA	250 nA	250 nA	100 nA	250 nA
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Operating Temperature	Not specified	150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Automotive Grade	No	No	No	Yes (AEC-Q101)	Yes (AEC-Q101)

Engineering Selection Recommendations

MSB92T1G (onsemi): Select this part for direct replacement in applications where the MSB92T1 specifications are sufficient. MSB92T1G maintains identical electrical performance and is the preferred choice due to active product status, RoHS3 compliance, and continued manufacturer support. This part is available in Tape & Reel packaging for production environments.

FMMTA92TA (Diodes Incorporated): Select this part when applications require increased collector current capacity (200 mA) or higher power dissipation (330 mW) while maintaining the same saturation voltage and current gain characteristics as the MSB92T1. This part is RoHS3 compliant and supports extended operating temperature range (-55°C to 150°C).

FMMT597TA (Diodes Incorporated): Select this part for applications requiring the highest performance margin within the 300 V breakdown voltage class. This part offers 200 mA collector current, 500 mW power dissipation, 75 MHz transition frequency, and lower saturation voltage (250 mV). FMMT597TA carries automotive-grade qualification (AEC-Q101) and is suitable for automotive and industrial applications requiring enhanced reliability.

MMBTA92-7-F (Diodes Incorporated): Select this part for applications requiring maximum collector current capacity (500 mA) within the 300 V breakdown voltage class. This part is automotive-grade (AEC-Q101) and RoHS3 compliant, making it suitable for high-current switching applications in automotive and industrial environments.

Frequently Asked Questions (FAQ)

Q: Can MSB92T1G be used as a direct replacement for MSB92T1?

A: Yes. MSB92T1G is a direct equivalent with identical electrical specifications: 300 V breakdown voltage, 150 mA maximum collector current, 50 MHz transition frequency, and 150 mW power dissipation. The primary difference is product status (active versus obsolete) and RoHS3 compliance. Both parts use the same SC-59 package.

Q: What is the difference between MSB92T1 and FMMTA92TA?

A: FMMTA92TA exceeds MSB92T1 specifications in collector current (200 mA versus 150 mA) and power dissipation (330 mW versus 150 mW). Both maintain 300 V breakdown voltage, 50 MHz transition frequency, and identical saturation voltage and current gain characteristics. FMMTA92TA is suitable for applications requiring higher current handling with the same switching performance.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use TO-236-3, SC-59, or SOT-23-3 packages, which share the same physical footprint and pin configuration. No PCB layout modifications are required for substitution.

Q: Which substitute part is recommended for automotive applications?

A: FMMT597TA and MMBTA92-7-F both carry automotive-grade qualification (AEC-Q101). FMMT597TA is recommended for applications requiring balanced performance (200 mA, 75 MHz, lower saturation voltage). MMBTA92-7-F is recommended for high-current applications (500 mA).

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates the part meets current environmental and hazardous substance restrictions. MSB92T1 is RoHS non-compliant, while all substitute parts (MSB92T1G, FMMTA92TA, FMMT597TA, MMBTA92-7-F) are RoHS3 compliant. This is relevant for new designs and applications subject to environmental regulations.

Q: Can MMBTA92-7-F be used in circuits designed for 150 mA maximum current?

A: Yes. MMBTA92-7-F is rated for 500 mA maximum collector current, which exceeds the 150 mA requirement. The part operates safely at lower current levels. The higher current rating provides design margin and thermal headroom in the application.

Q: What is the operating temperature range for MSB92T1 substitutes?

A: MSB92T1G specifies 150°C maximum junction temperature. FMMTA92TA, FMMT597TA, and MMBTA92-7-F all specify -55°C to 150°C operating temperature range, providing extended low-temperature capability for industrial and automotive environments.

Q: Is there a performance difference in transition frequency between substitutes?

A: FMMT597TA operates at 75 MHz transition frequency, exceeding the 50 MHz specification of MSB92T1 and other substitutes. This higher frequency capability is beneficial for high-speed switching applications but is not required for circuits designed around the 50 MHz specification.

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