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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated MMBTA64-7

Name: MMBTA64-7
Brand: Diodes Incorporated
SKU: MMBTA64-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA64-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: MMBTA64-7.pdf

Description:: TRANS PNP DARL 30V 0.5A SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:396

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Product details

Overview

MMBTA64-7 from Diodes Incorporated is a 30V PNP Darlington transistor in SOT23 package, designed for low-power amplification and switching with high DC current gain (h_FE = 10,000–20,000 at I_C = −100 mA), V_CE(sat) ≤ −1.5 V, and f_T = 125 MHz. It serves as a high-gain output stage in signal conditioning circuits, LED drivers, and relay interface modules.

For engineers reviewing the MMBTA64-7 datasheet, MMBTA64-7 pinout, MMBTA64-7 application, or MMBTA64-7 equivalent, key selection criteria include its Darlington configuration enabling microampere-level base drive, SOT23 footprint compatibility with space-constrained PCBs, JEDEC-qualified reliability for industrial ambient operation (−55°C to +150°C), and complementary pairing with MMBTA14 for push-pull designs.

Technical Context

The MMBTA64-7 implements a monolithic PNP Darlington pair with epitaxial planar die construction, delivering high h_FE without external bias networks. Its V_CEO = −30 V and V_EBO = −10 V define safe operating limits for low-voltage logic-level interfacing.

Thermal performance is characterized by R_θJA = 417°C/W on minimum pad layout, requiring derating above 25°C ambient per Fig. 1. ESD robustness includes HBM = 4,000 V and MM = 400 V, supporting handling in non-ESD-controlled assembly environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−30 V: Maximum collector-emitter voltage before breakdown; enables use in 24 V rail switching applications.
h_FE	10,000–20,000 @ I_C = −100 mA: Enables direct drive from µA-level MCU GPIO pins without base resistors.
V_CE(sat)	≤ −1.5 V @ I_C = −100 mA, I_B = −100 µA: Minimizes power loss in saturated switching mode.
f_T	125 MHz @ V_CE = −5 V, I_C = −10 mA: Supports audio-frequency amplification and fast digital edge response.
P_D	300 mW @ T_A = +25°C: Defines maximum continuous dissipation on standard FR-4 PCB with 1 oz copper.
ESD HBM	4,000 V: Allows safe manual handling and board-level rework without dedicated ESD protection circuitry.

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.008 g.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal of Darlington pair	Connected to higher potential (e.g., +V_CC) in common-emitter switch configurations.
Base (B)	Control input for internal Darlington pair	Accepts low-current logic signals; no external base resistor required for I_B ≥ 100 µA.
Collector (C)	Output current terminal	Drives load to ground; supports up to −500 mA continuous collector current.

Key Features

Feature	Design Value
High h_FE Darlington architecture	Reduces base drive requirements by >10× vs. single PNP transistors, simplifying MCU interface design.
SOT23 footprint	Enables compact placement in space-limited applications such as portable instrumentation and sensor nodes.
JEDEC-qualified reliability	Validated to high-reliability standards per AEC-Q references, supporting long-term deployment in industrial control systems.
Lead-free & "Green" construction	Complies with RoHS 3 (2015/863/EU) and halogen/antimony restrictions (<900 ppm Br/Cl, <1000 ppm Sb).

Applications

LED Driver Interface

Microcontroller Output Amplifier

Use Scenario: Driving high-brightness LEDs from 3.3 V or 5 V microcontroller outputs with limited sink capability.

IC Role / Device Role / Timing Role: High-gain PNP Darlington switch providing >100 mA LED current with <100 µA base drive.

Use Value: Eliminates need for discrete base-resistor networks or additional driver ICs, reducing BOM count and PCB area.

Use Scenario: Amplifying weak analog or digital signals from sensors or logic gates before ADC sampling or level translation.

IC Role / Device Role / Timing Role: Low-noise, high-h_FE amplifier stage configured in common-emitter topology.

Use Value: Maintains signal integrity while providing gain >10,000 at 10 mA collector current, suitable for precision analog front-ends.

Relay Coil Driver

Low-Voltage Power Switch

Use Scenario: Controlling 12 V or 24 V electromagnetic relays using 3.3 V logic outputs.

IC Role / Device Role / Timing Role: Saturated-switch Darlington providing full coil current with minimal V_CE(sat).

Use Value: Ensures reliable relay pull-in with <1.5 V drop across device, preserving margin for coil voltage tolerance.

Use Scenario: Enabling/disabling power rails in battery-powered IoT devices where quiescent current must be minimized.

IC Role / Device Role / Timing Role: Low-leakage PNP switch with I_CBO ≤ −100 nA, placed in high-side configuration.

Use Value: Achieves <100 nA off-state leakage, extending battery life in always-on monitoring applications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBTA63-7-F	Lower h_FE (5,000–10,000), otherwise identical electrical and mechanical specs.	Suitable where lower gain suffices and cost optimization is prioritized.	Select when base drive current ≥ 200 µA is available and tighter V_CE(sat) tolerance is not required.
PN2907A	TO-92 package, higher P_D = 625 mW, but larger footprint and lower f_T = 100 MHz.	Preferred in through-hole prototyping or legacy designs requiring axial leaded components.	Choose only if SOT23 is incompatible with assembly process or thermal budget allows larger package.

Compared with MMBTA63-7-F, the MMBTA64-7 offers double the minimum h_FE, enabling lower base drive and improved noise immunity; versus PN2907A, it delivers superior high-frequency response and board-area efficiency despite lower absolute power rating.

Availability

MMBTA64-7 is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller output amplifiers, and relay coil drivers requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for MMBTA64-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The MMBTA63/MMBTA64 series belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for low-power linear amplification and switching in space-constrained, cost-sensitive applications.

FAQ

What is the maximum continuous collector current for MMBTA64-7?

The absolute maximum continuous collector current is −500 mA at T_A = +25°C. Derating is required above 25°C ambient per Fig. 1 in the datasheet, with power dissipation limited to 300 mW at room temperature and decreasing linearly as ambient rises due to R_θJA = 417°C/W thermal resistance.

Can MMBTA64-7 replace MMBTA63-7 in existing designs?

Yes, MMBTA64-7 is a direct drop-in replacement for MMBTA63-7 in the same SOT23 package with identical pinout and voltage/current ratings. Its higher h_FE (10,000–20,000 vs. 5,000–10,000) improves base drive efficiency but does not affect biasing stability or saturation behavior under typical operating conditions.

Is MMBTA64-7 qualified for automotive applications?

No - the standard MMBTA64-7 is not AEC-Q200 qualified. Diodes offers automotive-grade variants with Q-suffix (e.g., MMBTA64Q-7-F) that undergo PPAP, are manufactured in IATF 16949-certified facilities, and meet AEC-Q200 stress testing requirements for passive components.

What is the recommended PCB pad layout for SOT23 mounting?

Diodes specifies a suggested SOT23 pad layout with dimensions C = 2.0 mm × 0.8 mm, X1 = 1.35 mm, Y = 0.9 mm, Y1 = 2.9 mm, and thermal pad clearance per their package outline document. Use minimum 1 oz copper on FR-4 to achieve the rated R_θJA = 417°C/W and avoid exceeding 300 mW power dissipation at 25°C ambient.

MMBTA64-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Cut Tape (CT)

Product Status:: Active

Transistor Type:: -

Current - Collector (Ic) (Max):: -

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

MMBTA64-7 FAQ

1.How can I place an order for MMBTA64-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA64-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MMBTA64-7 reliable?

The price and inventory of MMBTA64-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA64-7 is usually 5 days.

3.What payment methods are accepted for MMBTA64-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA64-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA64-7?

MMBTA64-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA64-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MMBTA64-7?

For technical support, including MMBTA64-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA64-7 requirements.

6.How does Aetrix verify that MMBTA64-7 is sourced from the original manufacturer or authorized distributors?

All MMBTA64-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBTA64-7 meets industry standards.

7.What is the process for return or replacement of MMBTA64-7?

All MMBTA64-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA64-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MMBTA64-7 part is unused and in its original packaging.

Return procedure for MMBTA64-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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