MMBTA06-7 Equivalent & Substitute Parts

Part Overview

The MMBTA06-7 is a Surface Mount NPN Bipolar Junction Transistor manufactured by Diodes Incorporated, rated for 80V collector-emitter breakdown voltage and 500mA maximum collector current. This device is packaged in SOT-23-3 (TO-236-3) configuration and is designed for general-purpose switching and amplification applications operating across -55°C to 150°C junction temperature range.

The MMBTA06-7 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or compatible electrical and mechanical specifications, enabling direct replacement in existing designs without circuit modification.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Max)	500	mA
Collector-Emitter Breakdown Voltage (Max)	80	V
Vce Saturation (Max)	250	mV @ 10mA, 100mA
DC Current Gain (hFE Min)	100	@ 100mA, 1V
Power Dissipation (Max)	300	mW
Transition Frequency	100	MHz
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the MMBTA06-7 are classified into two categories based on electrical parameter compatibility:

Category 1: Direct Parametric Equivalents These parts maintain identical electrical specifications across all critical parameters: 80V breakdown voltage, 500mA collector current, 100MHz transition frequency, 250mV saturation voltage, and 100 minimum DC current gain. Parts in this category differ only in packaging format (Cut Tape vs. Tape & Reel), manufacturer, or RoHS compliance status. Direct equivalents include MMBTA06-7-F, CMPTA06 TR PBFREE, SMMBTA06LT1G, SMMBTA06LT3G, MMSTA06T146, PMBTA06,215, and PMBTA06,235.

Category 2: Manufacturer Recommended Alternatives These parts are recommended by manufacturers as functional alternatives but operate within reduced electrical specifications. MMBT2484LT1G and MMBT2484LT3G reduce collector current to 100mA and breakdown voltage to 60V. MMBT6429LT1G reduces breakdown voltage to 45V and collector current to 200mA but increases transition frequency to 700MHz. These alternatives are suitable only for applications where the reduced ratings remain within design margins.

All substitute parts maintain SOT-23-3 surface mount packaging, identical pinout configuration, and compatible thermal characteristics.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Vce Sat mV	hFE (Min)	Power mW	fT MHz	Temp °C	Package	Status
MMBTA06-7	Diodes Inc.	500	80	250	100	300	100	-55 to 150	SOT-23-3	Discontinued
MMBTA06-7-F	Diodes Inc.	500	80	250	100	300	100	-55 to 150	SOT-23-3	Active
CMPTA06 TR PBFREE	Central Semiconductor	500	80	250	100	350	100	-65 to 175	SOT-23	Active
SMMBTA06LT1G	onsemi	500	80	250	100	225	100	-55 to 150	SOT-23-3	Active
SMMBTA06LT3G	onsemi	500	80	250	100	225	100	-55 to 150	SOT-23-3	Active
MMSTA06T146	Rohm Semiconductor	500	80	250	100	350	100	-55 to 150	SOT-23-3	Active
PMBTA06,215	Nexperia USA Inc.	500	80	250	100	250	100	-55 to 150	SOT-23-3	Active
PMBTA06,235	Nexperia USA Inc.	500	80	250	100	250	100	-55 to 150	SOT-23-3	Active
MMBT2484LT1G	onsemi	100	60	350	250	225	—	-55 to 150	SOT-23-3	Active
MMBT2484LT3G	onsemi	100	60	350	250	225	—	-55 to 150	SOT-23-3	Active
MMBT6429LT1G	onsemi	200	45	600	500	225	700	-55 to 150	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents)

MMBTA06-7-F from Diodes Incorporated is the direct equivalent replacement. This part maintains all electrical specifications of the original MMBTA06-7 and differs only in packaging format (Digi-Reel) and RoHS3 compliance status. Product status is Active with high inventory availability (215,400 units).

PMBTA06,215 and PMBTA06,235 from Nexperia USA Inc. are functionally equivalent alternatives with AEC-Q101 automotive qualification matching the original part's automotive grade designation. Both parts are Active status with substantial inventory. Power dissipation is rated at 250mW versus the original 300mW specification.

CMPTA06 TR PBFREE from Central Semiconductor Corp provides identical electrical performance with extended operating temperature range (-65°C to 175°C) and higher power rating (350mW). This part is suitable for applications requiring enhanced thermal margin.

SMMBTA06LT1G and SMMBTA06LT3G from onsemi maintain all critical electrical parameters with reduced power dissipation (225mW). These parts are Active status with high inventory availability and RoHS3 compliance.

MMSTA06T146 from Rohm Semiconductor provides equivalent electrical specifications with 350mW power rating and is qualified for automotive applications.

Alternative Substitutes (Reduced Specifications)

MMBT2484LT1G and MMBT2484LT3G from onsemi are manufacturer-recommended alternatives for applications where collector current requirements do not exceed 100mA and collector-emitter voltage remains below 60V. These parts feature higher DC current gain (250 minimum) and are suitable for low-current signal switching applications.

MMBT6429LT1G from onsemi is recommended for high-frequency applications requiring 700MHz transition frequency. This part operates at reduced voltage (45V maximum) and current (200mA maximum) ratings and is suitable only for designs operating within these reduced specifications.

Frequently Asked Questions (FAQ)

Q: Can MMBTA06-7-F be used as a direct replacement for MMBTA06-7?

A: Yes. MMBTA06-7-F maintains identical electrical specifications including 80V breakdown voltage, 500mA collector current, 100MHz transition frequency, and 250mV saturation voltage. The only differences are packaging format (Digi-Reel vs. standard tape) and RoHS3 compliance status. No circuit modification is required.

Q: What is the difference between PMBTA06,215 and PMBTA06,235?

A: Both parts are electrically identical with 80V breakdown voltage, 500mA collector current, and 100MHz transition frequency. The difference is in the part number suffix, which indicates different manufacturing batches or date codes from Nexperia USA Inc. Both are suitable for direct substitution.

Q: Can CMPTA06 TR PBFREE replace MMBTA06-7 in automotive applications?

A: Yes. CMPTA06 TR PBFREE maintains all critical electrical specifications and is RoHS3 compliant. However, it does not carry AEC-Q101 automotive qualification like the original MMBTA06-7 and PMBTA06,215. Verify automotive qualification requirements for your specific application.

Q: Why does SMMBTA06LT1G have lower power dissipation (225mW vs. 300mW)?

A: Power dissipation rating reflects the maximum thermal capability of the specific device design. SMMBTA06LT1G maintains all electrical performance parameters (voltage, current, gain) but operates within a lower power envelope. This is suitable for applications where power dissipation does not exceed 225mW.

Q: Are MMBT2484LT1G and MMBT6429LT1G direct replacements?

A: No. These are manufacturer-recommended alternatives with reduced electrical specifications. MMBT2484LT1G reduces collector current to 100mA and breakdown voltage to 60V. MMBT6429LT1G reduces breakdown voltage to 45V and collector current to 200mA. Use these parts only when application requirements fall within their reduced ratings.

Q: What is the significance of the packaging designation SOT-23-3 vs. TO-236-3?

A: SOT-23-3 and TO-236-3 refer to the same physical package with identical pinout and footprint. The designations are equivalent nomenclature used by different standards organizations. All listed substitute parts are mechanically compatible with the original MMBTA06-7 footprint.

Q: Can I use PMBTA06,215 in place of MMBTA06-7 if automotive qualification is required?

A: Yes. PMBTA06,215 carries AEC-Q101 automotive qualification and maintains all electrical specifications of the original part. It is suitable for automotive applications requiring qualified components.

Q: What inventory considerations should guide part selection?

A: MMBTA06-7-F (215,400 units), PMBTA06,215 (90,200 units), and MMBT6429LT1G (155,200 units) have the highest inventory availability. SMMBTA06LT3G (20,200 units) and MMSTA06T146 (4,080 units) have lower availability. Select based on both electrical requirements and supply chain lead time needs.

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