MMBTA06_D87Z Equivalent & Substitute Parts

Part Overview

The MMBTA06_D87Z is an NPN bipolar junction transistor manufactured by onsemi, housed in a SOT-23-3 surface mount package. This component is rated for 80 V collector-emitter breakdown voltage and 500 mA maximum collector current, with a transition frequency of 100 MHz and maximum power dissipation of 350 mW. The MMBTA06_D87Z is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Equivalent parts maintain identical electrical specifications and package compatibility, while substitute parts offer functional alternatives with modified packaging or slightly reduced power ratings.

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	—
Current - Collector Cutoff (Max)	100	nA
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 (TJ)
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3, TO-236-3, SC-59	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMBTA06_D87Z is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown (Max) must be 80 V
Current - Collector (Ic) (Max) must be 500 mA
Vce Saturation (Max) @ Ib, Ic must be 250 mV @ 10 mA, 100 mA
Current - Collector Cutoff (Max) must be 100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce must be 100 @ 100 mA, 1 V
Frequency - Transition must be 100 MHz
Operating Temperature Range must be −55°C to 150°C (TJ)

Mechanical Compatibility Criteria:

Mounting Type must be Surface Mount
Package / Case must be SOT-23-3, TO-236-3, SC-59, or SC-70-3 (SOT323)

Direct Equivalents maintain all electrical parameters and are available in SOT-23-3 packaging with active product status and RoHS3 compliance.

Package Variants maintain all electrical parameters but utilize alternative surface mount packages (SC-70-3) with reduced power dissipation ratings (150 mW to 225 mW).

Cross-Manufacturer Equivalents from Diodes Incorporated and Micro Commercial Co maintain all electrical parameters with SOT-23-3 packaging and active product status.

Similar Parts from alternative manufacturers meet the core electrical specifications but may have different power ratings or package designations.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce Breakdown (Max) V	Power (Max) mW	Frequency MHz	Package	RoHS Status
MMBTA06_D87Z	onsemi	Obsolete	500	80	350	100	SOT-23-3	REACH Unaffected
MMBTA06LT1G	onsemi	Active	500	80	225	100	SOT-23-3	ROHS3 Compliant
SMMBTA06LT1G	onsemi	Active	500	80	225	100	SOT-23-3	ROHS3 Compliant
SMMBTA06WT3G	onsemi	Active	500	80	150	100	SC-70-3	ROHS3 Compliant
MMBTA06WT1G	onsemi	Active	500	80	150	100	SC-70-3	ROHS3 Compliant
MMBTA06LT3G	onsemi	Active	500	80	225	100	SOT-23-3	ROHS3 Compliant
SMMBTA06LT3G	onsemi	Active	500	80	225	100	SOT-23-3	ROHS3 Compliant
MMBTA06-7-F	Diodes Incorporated	Active	500	80	300	100	SOT-23-3	ROHS3 Compliant
MMBTA06-TP	Micro Commercial Co	Active	500	500	300	100	SOT-23-3	ROHS3 Compliant
MMSTA06T146	Rohm Semiconductor	Active	500	80	350	100	SMT3	ROHS3 Compliant
MMBT6429LT1G	onsemi	Active	200	45	225	700	SOT-23-3	ROHS3 Compliant

Engineering Selection Recommendations

Primary Equivalent Selection:

For direct replacement of the obsolete MMBTA06_D87Z in SOT-23-3 packaging, select from the following active onsemi parts:

MMBTA06LT1G (Cut Tape & Digi-Reel packaging) — 2,255,600 units in stock
MMBTA06LT3G (Tape & Reel packaging) — 4,934 units in stock
SMMBTA06LT1G (Tape & Reel packaging) — 206,300 units in stock
SMMBTA06LT3G (Tape & Reel packaging) — 20,200 units in stock

All four parts maintain the core electrical specifications (80 V, 500 mA, 100 MHz, 100 mV saturation voltage) and are RoHS3 compliant with REACH Unaffected status. The primary difference is power dissipation rating (225 mW versus 350 mW of the original part) and packaging format (Cut Tape vs. Tape & Reel).

Cross-Manufacturer Equivalents:

MMBTA06-7-F (Diodes Incorporated) — SOT-23-3 package, 300 mW power rating, 215,400 units in stock
MMBTA06-TP (Micro Commercial Co) — SOT-23-3 package, 300 mW power rating, 81,996 units in stock

Both maintain SOT-23-3 compatibility and active product status with RoHS3 compliance.

Package Variant Selection:

For applications requiring smaller form factor:

MMBTA06WT1G (onsemi, Cut Tape & Digi-Reel) — SC-70-3 package, 150 mW, 35,200 units in stock
SMMBTA06WT3G (onsemi, Tape & Reel) — SC-70-3 package, 150 mW, 11,027 units in stock

SC-70-3 package variants are electrically equivalent but feature reduced power dissipation (150 mW) and smaller physical dimensions.

Alternative Manufacturer:

MMSTA06T146 (Rohm Semiconductor) — SMT3 package, 350 mW power rating matching the original part, 4,080 units in stock

All recommended parts are active products with RoHS3 compliance and REACH Unaffected status, suitable for new design implementation and production continuity.

Frequently Asked Questions (FAQ)

Q: Can MMBTA06LT1G directly replace MMBTA06_D87Z in existing designs?

A: Yes. MMBTA06LT1G maintains identical electrical specifications (80 V, 500 mA, 100 MHz, 100 mV saturation voltage, 100 mA DC current gain) and SOT-23-3 package compatibility. The primary difference is reduced power dissipation (225 mW versus 350 mW). This substitution is valid for applications where the circuit power budget does not require the full 350 mW rating.

Q: What is the difference between MMBTA06LT1G and SMMBTA06LT1G?

A: Both parts are electrically identical with 80 V, 500 mA, 100 MHz specifications and SOT-23-3 packaging. The difference is packaging format: MMBTA06LT1G is supplied in Cut Tape & Digi-Reel format, while SMMBTA06LT1G is supplied in Tape & Reel format. Selection depends on assembly line requirements and tape specifications.

Q: Why do some substitute parts have lower power ratings (225 mW or 150 mW)?

A: Power dissipation rating reflects the maximum thermal capability of the specific package variant. SOT-23-3 packages from onsemi are rated at 225 mW, while SC-70-3 packages are rated at 150 mW due to smaller physical dimensions. Electrical performance remains identical; power rating reduction reflects thermal design differences, not functional capability.

Q: Can SC-70-3 package variants (MMBTA06WT1G, SMMBTA06WT3G) be used as direct replacements?

A: SC-70-3 variants are electrically equivalent but physically smaller than SOT-23-3. Direct replacement requires PCB layout modification to accommodate the smaller package footprint. Electrical specifications remain identical (80 V, 500 mA, 100 MHz).

Q: Is MMBT6429LT1G a suitable substitute?

A: No. MMBT6429LT1G is a similar but not equivalent part. It features different electrical specifications: 45 V breakdown voltage (versus 80 V), 200 mA maximum collector current (versus 500 mA), and 700 MHz transition frequency (versus 100 MHz). This part is suitable only for applications with lower voltage and current requirements.

Q: What is the difference between Diodes Incorporated MMBTA06-7-F and onsemi MMBTA06LT1G?

A: Both are SOT-23-3 NPN transistors with 80 V, 500 mA, 100 MHz specifications. MMBTA06-7-F has 300 mW power rating, while MMBTA06LT1G has 225 mW. Both are RoHS3 compliant and active products. Selection depends on manufacturer preference and supply chain requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry RoHS3 Compliant status. The original MMBTA06_D87Z is REACH Unaffected; all active substitutes maintain REACH Unaffected status as well.

Q: Can MMSTA06T146 from Rohm Semiconductor be used as a direct replacement?

A: Yes. MMSTA06T146 maintains identical electrical specifications (80 V, 500 mA, 100 MHz, 100 mV saturation voltage) and 350 mW power rating matching the original part. The package designation is SMT3 rather than SOT-23-3, but both are mechanically compatible surface mount packages. This part is suitable for applications requiring the full 350 mW power capability.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts maintain the original operating temperature range of −55°C to 150°C (TJ), ensuring thermal compatibility with the original MMBTA06_D87Z across the full specified temperature envelope.

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