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Diodes Incorporated MMBTA14-7-F
- Part No.:
- MMBTA14-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBTA14-7-F.pdf
- Description:
- TRANS NPN DARL 30V 0.3A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,684
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Product details
Overview
MMBTA14-7-F from Diodes Incorporated is a 30V NPN Darlington transistor in SOT23 package, optimized for medium-power switching and amplification with minimum DC current gain of 10,000 at IC = 10mA/VCE = 5V, VCE(sat) ≤ 1.5V at IC = 100mA/IB = 100µA, and 125MHz transition frequency - deployed in relay drivers, LED matrix controllers, and low-voltage logic-level interface circuits.
For engineers reviewing the MMBTA14-7-F datasheet, MMBTA14-7-F pinout, MMBTA14-7-F application, or MMBTA14-7-F equivalent, key selection criteria include verified Darlington gain linearity above 100mA, thermal derating compliance to 417°C/W RθJA on FR-4, ESD robustness (4kV HBM), and SOT23 footprint compatibility with automated placement systems.
Technical Context
This device implements a monolithic two-stage NPN Darlington configuration delivering high current gain without external biasing components. Its 30V VCEO and 300mA IC rating support operation in 24V industrial control rails and 5V/3.3V logic-synchronized loads.
Thermal performance is defined for minimum pad layout on single-sided FR-4: power dissipation derates linearly from 300mW at 25°C to zero at 150°C ambient, with JEDEC-compliant ESD ratings (4kV HBM, 400V MM, 1kV CDM) enabling use in unshielded assembly environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum collector-emitter voltage before breakdown under open-base conditions; sets safe operating limit for 24V system switches. |
| hFE (min) | 10,000 @ IC = 10mA - Ensures single-stage current amplification sufficient to drive 100mA loads with ≤10µA base current. |
| VCE(sat) | ≤1.5 V @ IC = 100mA/IB = 100µA - Limits conduction loss to <150mW in saturated switching, critical for thermally constrained PCBs. |
| fT | 125 MHz - Supports small-signal amplification up to audio frequencies and fast digital edge response in pulse applications. |
| RθJA | 417 °C/W - Specifies thermal resistance from junction to ambient on standard 1oz copper FR-4; enables accurate temperature rise calculation. |
| ESD HBM | 4,000 V - Confirmed human-body-model robustness per JESD22-A114; reduces handling damage risk during manual assembly or rework. |
Pinout & Package
Package: SOT23 - surface-mount plastic package measuring 2.9mm × 1.3mm × 1.0mm (L × W × H), rated UL 94V-0, moisture sensitivity level 1, and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Low-side return path; connected directly to ground or load common in high-gain switch configurations. |
| 2 (Base) | B | Current-controlled input node; requires series resistor to limit IB and ensure saturation at target IC. |
| 3 (Collector) | C | High-side output node; connects to load supply rail (e.g., 24V) and switched load (e.g., relay coil). |
Key Features
| Feature | Design Value |
|---|---|
| Darlington architecture | Monolithic two-transistor stack integrated in single die - eliminates external wiring, improves gain consistency, and reduces board space vs discrete pair. |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br, <900ppm Cl, <1000ppm Sb) - meets IPC-1752A environmental reporting requirements. |
| Lead-free & RoHS 3 compliant | No purposely added lead; fully compliant with EU Directive 2015/863/EU - supports global market access and end-of-life recycling mandates. |
| Ambient temperature range | –55°C to +150°C - enables deployment in under-hood automotive modules, industrial motor controls, and outdoor power supplies. |
Applications
| Relay Driver Circuit | LED Matrix Row Selector |
|---|---|
|
Use Scenario: Driving 24V/100mA electromagnetic relays from microcontroller GPIO pins. IC Role / Device Role: High-gain current amplifier converting 5mA MCU output into 100mA coil current. Use Value: Eliminates need for external base resistor network and second transistor stage while maintaining <1.5V saturation drop. |
Use Scenario: Selecting rows in 8×8 LED matrices powered by 5V logic rails. IC Role / Device Role: Low-VCE(sat) row switch enabling uniform brightness across all columns via constant-current column drivers. Use Value: Reduces row voltage overhead to ≤1.5V, preserving ≥3.5V headroom for column driver compliance and thermal margin. |
| Logic-Level Interface | Industrial Sensor Signal Conditioning |
|
Use Scenario: Level-shifting 3.3V I/O signals to control 12V solenoid valves in PLC I/O modules. IC Role / Device Role: Voltage-tolerant interface buffer isolating low-voltage logic from higher-voltage actuation circuitry. Use Value: Withstands 30V VCEO and delivers >10k hFE at 3.3V base drive - avoids level-shifter ICs or MOSFET gate drivers. |
Use Scenario: Amplifying weak analog sensor outputs (e.g., thermistor bridges) before ADC sampling in condition-monitoring nodes. IC Role / Device Role: Medium-gain, low-noise preamplifier stage operating in linear region with stable hFE across –40°C to +85°C. Use Value: Maintains hFE ≥5,000 at IC = 100µA - enables precise gain-setting with minimal drift over industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBTA13-7-F | Lower hFE (5,000 min @ IC = 10mA) and same VCEO/VCE(sat) specs - reduced gain margin at low base drive. | Suitable where base current is unconstrained or higher IB is acceptable for same IC. | Select when cost optimization outweighs gain headroom needs in non-critical switching. |
| ULN2003A | 7-channel Darlington array in SO-16; includes integrated clamp diodes and 500mA per channel - higher integration but larger footprint. | Preferred for multi-load control (e.g., stepper motor phases, multi-relay banks) where board space permits. | Choose when driving ≥2 independent loads simultaneously and clamping protection is required. |
Compared with MMBTA13-7-F, the MMBTA14-7-F provides double the guaranteed hFE at mid-current, enabling lower base drive power and tighter thermal margins; versus ULN2003A, it offers minimal footprint and single-channel optimization but lacks integrated protection and multi-channel capability.
Availability
MMBTA14-7-F is available at Aetrix Electronics and suitable for relay driver circuits, LED matrix row selection, and logic-level interface designs requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle availability.
Supply support for MMBTA14-7-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBTA14-7-F belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-sensitive, high-volume industrial and consumer applications demanding reliable gain, thermal stability, and RoHS-compliant packaging.
FAQ
What is the maximum continuous collector current for MMBTA14-7-F?
The absolute maximum collector current is 300mA per the datasheet's Absolute Maximum Ratings table. However, sustained operation above 100mA requires thermal derating based on ambient temperature and PCB copper area - at 25°C ambient on minimum pad layout, the practical continuous IC limit is 100mA to maintain junction temperature below 150°C.
Does MMBTA14-7-F require an external base resistor in switching applications?
Yes - a series base resistor is mandatory to limit IB and ensure saturation. For example, driving 100mA IC with hFE = 10,000 requires ≥10µA IB; with 5V GPIO, a 470kΩ resistor limits IB to ~10.6µA while providing noise margin and preventing overdrive.
Can MMBTA14-7-F be used in linear amplification mode?
Yes - its hFE remains stable down to IC = 100µA and up to 100mA, and VCE(sat) is specified at multiple current points. However, fT = 125MHz and low output capacitance (Cobo = 8pF) make it better suited for low-frequency (<1MHz) analog gain stages than RF applications.
Is MMBTA14-7-F qualified for automotive applications?
No - the datasheet explicitly states that AEC-Q100/101 qualification requires direct engagement with Diodes' automotive team. Standard MMBTA14-7-F is intended for industrial and commercial use; automotive-grade variants (e.g., with PPAP documentation and IATF 16949 manufacturing) must be specially ordered.
MMBTA14-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 300 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.5V @ 100µA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20000 @ 100mA, 5V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 125MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBTA14-7-F FAQ
1.How can I place an order for MMBTA14-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBTA14-7-F 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 MMBTA14-7-F reliable?
The price and inventory of MMBTA14-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA14-7-F is usually 5 days.
3.What payment methods are accepted for MMBTA14-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA14-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBTA14-7-F?
MMBTA14-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBTA14-7-F 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 MMBTA14-7-F?
For technical support, including MMBTA14-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA14-7-F requirements.
6.How does Aetrix verify that MMBTA14-7-F is sourced from the original manufacturer or authorized distributors?
All MMBTA14-7-F 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 MMBTA14-7-F meets industry standards.
7.What is the process for return or replacement of MMBTA14-7-F?
All MMBTA14-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA14-7-F, 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 MMBTA14-7-F part is unused and in its original packaging.
Return procedure for MMBTA14-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBTA14-7-F Tags
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