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Diodes Incorporated MMBTA55-7-F
- Part No.:
- MMBTA55-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBTA55-7-F.pdf
- Description:
- TRANS PNP 60V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,371
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Product details
Overview
MMBTA55-7-F from Diodes Incorporated is a 60V PNP medium-power bipolar junction transistor in SOT23 package, rated for -500mA continuous collector current and 310mW power dissipation at TA=25°C on minimum pad layout. It delivers hFE ≥100 at IC = -10mA/VCE = -1.0V, VCE(sat) ≤ -0.25V at IC = -100mA/IB = -10mA, and fT ≥50MHz, commonly used in low-power switching and amplification stages of industrial control signal conditioning circuits.
For engineers reviewing the MMBTA55-7-F datasheet, MMBTA55-7-F pinout, MMBTA55-7-F application, or MMBTA55-7-F equivalent, key selection criteria include its PNP polarity, SOT23 footprint compatibility, guaranteed hFE performance across -55°C to +150°C, ESD robustness (4kV HBM), and complementary pairing with MMBTA05/06 for push-pull designs.
Technical Context
This PNP transistor employs epitaxial planar die construction for stable gain and low leakage. Its -60V VCBO and VCEO ratings support operation in 48V rail interfaces and relay driver circuits where reverse-biased base-collector junction integrity is critical.
Thermal design relies on RθJA = 403°C/W (min pad) and RθJL = 350°C/W, enabling reliable operation up to +150°C junction temperature. The -4.0V VEBO rating ensures safe biasing in emitter-follower configurations with modest base drive swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Collector-Emitter Voltage (VCEO) | -60 V - Supports switching loads referenced to positive rails up to 48V systems with margin. |
| Continuous Collector Current (IC) | -500 mA - Sufficient for driving small relays, LEDs, or logic-level interface transistors. |
| DC Current Gain (hFE) | ≥100 at IC = -10mA - Ensures reliable saturation with low base drive in switching applications. |
| Collector-Emitter Saturation Voltage (VCE(sat)) | ≤ -0.25 V at IC = -100mA/IB = -10mA - Minimizes conduction loss and self-heating in active switching. |
| Transition Frequency (fT) | ≥50 MHz - Enables use in audio-frequency amplification and fast digital switching (e.g., <20ns rise/fall). |
| ESD Rating (HBM) | 4,000 V - Reduces risk of handling damage during PCB assembly and field service. |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads; UL 94V-0 rated molding compound; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current source terminal for PNP device | Connected to higher potential node; defines reference for base bias and load return path. |
| Base (B) | Control electrode | Receives negative-going drive signal relative to emitter to enable conduction. |
| Collector (C) | Current sink terminal | Connected to load and lower-potential rail; carries full switched current with minimal VCE(sat) drop. |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die construction | Ensures consistent hFE distribution and low leakage (ICEX ≤ -100nA) across production lots. |
| Complementary NPN pairing | Direct match with MMBTA05/06 enables balanced push-pull output stages without gain mismatch. |
| Lead-free & halogen-free "Green" compliance | Meets RoHS 3 (2015/863/EU) and automotive-grade material restrictions (<900ppm Br/Cl, <1000ppm Sb). |
| High ESD immunity | 4kV HBM rating eliminates need for external protection diodes in most board-level handling scenarios. |
Applications
| Industrial Sensor Interface | LED Driver Circuit |
|---|---|
Use Scenario: Amplifying low-level analog signals from RTD or thermistor bridges before ADC sampling. IC Role / Device Role / Timing Role: PNP emitter-follower buffer providing high input impedance and low output impedance. Use Value: Maintains signal fidelity with hFE ≥100 at µA-level base currents and operates reliably over -40°C to +85°C ambient. |
Use Scenario: Switching 20–100mA indicator or status LEDs in programmable logic controllers. IC Role / Device Role / Timing Role: Low-side switch controlling LED anode connection to regulated 3.3V/5V rail. Use Value: Achieves <0.25V saturation drop at 100mA, limiting power loss to <25mW and enabling compact thermal design. |
| Relay Driver Stage | Level Translation Interface |
Use Scenario: Driving 12V/24V electromagnetic relay coils requiring 20–50mA hold current. IC Role / Device Role / Timing Role: PNP high-side switch sourcing current from positive rail into relay coil. Use Value: Withstands 60V VCEO margin against inductive kickback and supports 150°C junction operation during transient overload. |
Use Scenario: Translating 1.8V logic outputs to 5V-tolerant inputs in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: Active pull-up stage converting open-drain or weak GPIO signals to robust CMOS levels. Use Value: Delivers sharp edge response (fT ≥50MHz) and maintains noise margin with -4.0V VEBO rating under negative transient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC807-25-7-F | Higher hFE (250 min vs. 100 min), same SOT23, -45V VCEO | Better suited for low-base-drive linear amplification; less margin for 48V systems | Select when gain stability at low IC (<1mA) is prioritized over voltage headroom |
| PN2907A-RTK/P | TO-92 package, -60V VCEO, -600mA IC, but larger footprint and 500mW PD | Requires through-hole assembly; better thermal dissipation but incompatible with SMT-only lines | Choose only if legacy TO-92 compatibility or higher power derating is mandatory |
Compared with BC807-25-7-F and PN2907A-RTK/P, MMBTA55-7-F offers optimal balance of SOT23 miniaturization, 60V system compatibility, and predictable gain at moderate currents-making it preferred for space-constrained industrial control modules requiring RoHS3 compliance.
Availability
MMBTA55-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver circuits, relay driver stages, and level translation interfaces requiring stable component supply and long-term manufacturability.
Supply support for MMBTA55-7-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 and manufacturing operations across Asia and the Americas.
This device belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability industrial and consumer applications requiring consistent parametric performance and green material compliance.
FAQ
What is the maximum operating temperature for MMBTA55-7-F?
The MMBTA55-7-F has an operating junction temperature range of -55°C to +150°C, verified per absolute maximum ratings in DS30054 Rev. 14-2. At ambient temperatures above +85°C, power dissipation must be derated using the published curve (Figure 1), with RθJA = 403°C/W on minimum pad layout.
Is MMBTA55-7-F pin-compatible with MMBTA56-7-F?
No-MMBTA55-7-F and MMBTA56-7-F share identical SOT23 pinout and marking code (K2G), but differ in voltage ratings: MMBTA55 is rated -60V VCEO/VCBO, while MMBTA56 is -80V. Substitution requires verification that -60V margin is sufficient for the target circuit's worst-case transients.
Does MMBTA55-7-F support automotive applications?
The standard MMBTA55-7-F is not qualified to AEC-Q101. Diodes offers the automotive-compliant MMBTA55Q variant (separate datasheet), which undergoes additional stress testing and PPAP documentation. Use MMBTA55-7-F only in non-automotive industrial or consumer systems.
What is the typical VBE(sat) at IC = -100mA?
Per DS30054 Rev. 14-2 page 4, VBE(sat) is specified as ≤ -1.2V at IC = -100mA and VCE = -1.0V. Typical curves (Figure 6) show ~-0.95V at this condition, confirming adequate base drive margin for reliable saturation with standard logic-level drivers.
MMBTA55-7-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:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBTA55-7-F FAQ
1.How can I place an order for MMBTA55-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBTA55-7-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 MMBTA55-7-F reliable?
The price and inventory of MMBTA55-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA55-7-F is usually 5 days.
3.What payment methods are accepted for MMBTA55-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA55-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBTA55-7-F?
MMBTA55-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBTA55-7-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 MMBTA55-7-F?
For technical support, including MMBTA55-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA55-7-F requirements.
6.How does Aetrix verify that MMBTA55-7-F is sourced from the original manufacturer or authorized distributors?
All MMBTA55-7-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 MMBTA55-7-F meets industry standards.
7.What is the process for return or replacement of MMBTA55-7-F?
All MMBTA55-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA55-7-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 MMBTA55-7-F part is unused and in its original packaging.
Return procedure for MMBTA55-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBTA55-7-F Tags
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