MMBTA06 NPN Bipolar Junction Transistor Equivalent & Substitute Parts

Part Overview

The MMBTA06 is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. The device features an 80 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 100 MHz transition frequency in a surface mount SOT-23-3 package. The MMBTA06 is classified as obsolete; however, direct equivalents and functional substitutes remain available from multiple manufacturers. Identifying suitable alternatives is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	80	V
Current - Collector (Ic) (Max)	500	mA
Vce Saturation (Max) @ Ib, Ic	250 mV @ 10 mA, 100 mA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100 mA, 1 V	—
Power - Max	350	mW
Frequency - Transition	100	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the MMBTA06 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (mandatory)
Voltage - Collector Emitter Breakdown (Max): 80 V (mandatory)
Current - Collector (Ic) (Max): 500 mA (mandatory)
Vce Saturation (Max) @ Ib, Ic: 250 mV @ 10 mA, 100 mA (mandatory)
DC Current Gain (hFE) (Min) @ Ic, Vce: 100 @ 100 mA, 1 V (mandatory)
Frequency - Transition: 100 MHz (mandatory)
Operating Temperature Range: -55°C to 150°C (mandatory)
Package / Case: SOT-23-3 or equivalent surface mount package (mandatory)

Direct Equivalents maintain all electrical parameters and package specifications. These parts are interchangeable without circuit modification.

Package Variants include parts with identical electrical specifications but different surface mount package options (SOT-23-3 vs. SC-70-3). These require PCB layout verification before substitution.

Similar Parts share the same voltage and current ratings but may differ in transition frequency, saturation voltage, or current gain specifications. These are suitable only when the application does not depend on the specific parameter differences.

Parameter Comparison

Part Number	Manufacturer	Vce Breakdown (V)	Ic Max (mA)	Vce Sat @ 10mA, 100mA (mV)	hFE Min @ 100mA, 1V	Frequency (MHz)	Power Max (mW)	Package	Product Status
MMBTA06	onsemi	80	500	250	100	100	350	SOT-23-3	Obsolete
MMBTA06LT1G	onsemi	80	500	250	100	100	225	SOT-23-3	Active
SMMBTA06LT1G	onsemi	80	500	250	100	100	225	SOT-23-3	Active
SMMBTA06WT3G	onsemi	80	500	250	100	100	150	SC-70-3	Active
MMBTA06LT3G	onsemi	80	500	250	100	100	225	SOT-23-3	Active
MMBTA06-7-F	Diodes Incorporated	80	500	250	100	100	300	SOT-23-3	Active
MMSTA06T146	Rohm Semiconductor	80	500	250	100	100	350	SMT3	Active
PMBTA06,215	Nexperia USA Inc.	80	500	250	100	100	250	TO-236AB	Active
MMBT8099LT1G	onsemi	80	500	400	100	150	225	SOT-23-3	Active
CMPT3019 BK PBFREE	Central Semiconductor Corp	80	500	500	100	400	350	SOT-23	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical & Package Specifications):

MMBTA06LT1G, SMMBTA06LT1G, and MMBTA06LT3G are direct onsemi equivalents with active product status. All three maintain the 80 V breakdown voltage, 500 mA collector current, 100 MHz transition frequency, and SOT-23-3 package. Power dissipation is reduced to 225 mW compared to the original 350 mW specification, which is acceptable for applications not requiring maximum power handling. These parts are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1).

MMBTA06-7-F (Diodes Incorporated) and MMSTA06T146 (Rohm Semiconductor) provide alternative manufacturer sources with identical electrical parameters. MMBTA06-7-F maintains 300 mW power rating in SOT-23-3 package. MMSTA06T146 matches the original 350 mW power specification in SMT3 package and is ROHS3 compliant.

PMBTA06,215 (Nexperia USA Inc.) is an automotive-grade equivalent qualified to AEC-Q101 standard, suitable for automotive applications requiring functional equivalence with enhanced reliability documentation.

Package Variant (Identical Electrical, Different Package):

SMMBTA06WT3G is an onsemi part with identical electrical specifications but packaged in SC-70-3 (SOT323) instead of SOT-23-3. This smaller package requires PCB layout modification and is suitable only when space constraints justify the design change. Power rating is reduced to 150 mW.

Similar Performance (Parameter Deviations):

MMBT8099LT1G shares the 80 V / 500 mA / 100 mA ratings but exhibits higher saturation voltage (400 mV vs. 250 mV) and higher transition frequency (150 MHz vs. 100 MHz). This part is suitable for applications where increased switching speed is beneficial and saturation voltage tolerance permits the deviation.

CMPT3019 BK PBFREE (Central Semiconductor Corp) offers the highest transition frequency (400 MHz) and maintains 350 mW power rating but exhibits significantly higher saturation voltage (500 mV). This part is suitable for high-frequency switching applications where saturation voltage is not a limiting factor.

Compliance & Availability:

All recommended active substitutes are ROHS3 compliant and REACH unaffected. Inventory availability ranges from 4,080 to 2,255,600 units across the substitute options, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MMBTA06LT1G replace MMBTA06 in all applications?

A: MMBTA06LT1G is electrically equivalent to MMBTA06 across all critical parameters: 80 V breakdown voltage, 500 mA collector current, 100 MHz transition frequency, and identical saturation voltage. The primary difference is reduced power dissipation (225 mW vs. 350 mW). Substitution is valid provided the application does not require the full 350 mW power handling capability. Both parts use identical SOT-23-3 packaging and require no PCB modification.

Q: What is the difference between MMBTA06LT1G and SMMBTA06LT1G?

A: Both parts are onsemi MMBTA06 equivalents with identical electrical specifications. The difference is packaging format: MMBTA06LT1G is supplied in Cut Tape (CT) & Digi-Reel format, while SMMBTA06LT1G is supplied in Tape & Reel (TR) format. Electrical performance and PCB compatibility are identical. Selection depends on procurement and assembly process requirements.

Q: Is SMMBTA06WT3G a direct substitute for MMBTA06?

A: SMMBTA06WT3G maintains all electrical specifications but uses SC-70-3 (SOT323) package instead of SOT-23-3. This is a smaller package requiring PCB layout modification. Electrical substitution is valid, but physical board redesign is necessary. Power rating is also reduced to 150 mW. Use this part only when space constraints justify the design change.

Q: Can PMBTA06,215 be used in non-automotive applications?

A: Yes. PMBTA06,215 is an automotive-grade part qualified to AEC-Q101 standard, but it is electrically and mechanically compatible with non-automotive applications. The automotive qualification provides additional reliability documentation and process controls. Substitution is valid for any application accepting the TO-236AB package variant.

Q: What is the advantage of CMPT3019 BK PBFREE over MMBTA06?

A: CMPT3019 BK PBFREE offers significantly higher transition frequency (400 MHz vs. 100 MHz) and maintains the same 350 mW power rating as the original MMBTA06. However, saturation voltage is substantially higher (500 mV vs. 250 mV). This part is suitable for high-frequency switching applications where increased saturation voltage is acceptable. Applications sensitive to saturation voltage should use MMBTA06LT1G or equivalent instead.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original MMBTA06 (obsolete status) does not carry ROHS3 designation. All recommended active substitutes meet current environmental compliance requirements.

Q: What packaging options are available for MMBTA06 substitutes?

A: Primary packaging is SOT-23-3 (TO-236-3, SC-59), available from onsemi, Diodes Incorporated, and Nexperia. Rohm Semiconductor offers SMT3 package. onsemi also provides SC-70-3 (SOT323) variant. All packages are surface mount. Selection depends on PCB design and assembly equipment compatibility.

Q: Can MMBT8099LT1G be used as a direct replacement?

A: MMBT8099LT1G is electrically similar but not identical. It maintains 80 V / 500 mA ratings and 100 MHz minimum transition frequency but exhibits higher saturation voltage (400 mV vs. 250 mV) and higher actual transition frequency (150 MHz). Substitution is valid for applications where saturation voltage tolerance permits the 60% increase. Applications with tight saturation voltage specifications should use MMBTA06LT1G instead.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message