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Diodes Incorporated MMBTA05-7
- Part No.:
- MMBTA05-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBTA05-7.pdf
- Description:
- TRANS NPN 60V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,151
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Product details
Overview
MMBTA05-7 from Diodes Incorporated is an NPN medium-power bipolar junction transistor in SOT23 package, rated for 60 V VCEO, 500 mA IC, and 310 mW PD at TA = 25°C on minimum pad layout. It delivers hFE ≥ 100 at IC = 10 mA / VCE = 1.0 V and VCE(sat) ≤ 0.25 V at IC = 100 mA / IB = 10 mA, supporting low-power amplification and switching in signal conditioning stages of industrial sensor interfaces.
For engineers reviewing the MMBTA05-datasheet, MMBTA05-7 pinout, MMBTA05-7 application, or MMBTA05-7 equivalent, this page provides verified package mapping (SOT23), terminal roles (C/E/B), absolute maximum ratings, thermal derating curves, and complementary PNP alternatives - all confirmed against Diodes DS30037 Rev. 18-2 (September 2025).
Technical Context
This NPN transistor uses epitaxial planar die construction for stable gain and low leakage, with BVCBO = 60 V and ICBO ≤ 100 nA at VCB = 60 V. Its fT = 100 MHz enables use in audio-frequency amplifiers and digital switching up to ~10 MHz.
Thermal design is constrained by RθJA = 403 °C/W on minimal FR4 layout and 357 °C/W on 15 mm × 15 mm copper; safe operating area (SOA) limits DC operation to ≤ 100 mA at VCE = 30 V under ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines rail tolerance in low-side switch designs. |
| IC | 500 mA - Continuous collector current rating; supports driving small relays or LED arrays without forced cooling. |
| PD | 310 mW - Power dissipation limit on standard PCB layout; requires thermal relief for >200 mW sustained operation. |
| hFE | ≥100 @ IC=10 mA - Ensures reliable base drive margin in linear amplifier configurations with low input current. |
| VCE(sat) | ≤0.25 V @ IC=100 mA - Minimizes conduction loss in saturated-switch applications such as logic-level translation. |
| fT | 100 MHz - Supports small-signal amplification up to mid-audio frequencies with predictable gain roll-off. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink node; connects to ground or low-impedance return path in common-emitter configurations. |
| 2 (Base) | B | Control input; requires ~10 mA drive for full saturation at 100 mA collector load. |
| 3 (Collector) | C | Current source node; ties to positive rail or load in low-side switching topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die construction | Enables tight parameter distribution and low leakage (ICBO ≤ 100 nA), critical for battery-powered sensor bias networks. |
| Complementary PNP pairing | Direct match with MMBTA55 for push-pull output stages requiring matched gain and thermal tracking. |
| Lead-free & halogen-free "Green" compliance | Fully RoHS 3 compliant (<900 ppm Br/Cl, <1000 ppm Sb); qualified for automotive-grade assembly without exemption waivers. |
| SOT23 footprint compatibility | Standardized 2.9 mm × 1.3 mm outline with 0.95 mm lead pitch enables drop-in replacement in legacy designs using similar transistors. |
Applications
| Industrial Sensor Signal Conditioning | Low-Voltage Logic-Level Translation |
|---|---|
|
Use Scenario: Amplifying millivolt-level outputs from RTDs or thermocouples before ADC sampling in programmable logic controllers. IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed-gain bias network, providing 20–40 dB voltage gain at DC–10 kHz. Use Value: hFE ≥ 100 ensures stable gain across -55°C to +125°C, reducing calibration drift in unheated enclosures. |
Use Scenario: Converting 3.3 V microcontroller GPIO outputs to 5 V TTL-compatible signals for legacy peripherals. IC Role / Device Role / Timing Role: Saturated switch operating in cutoff/saturation modes with <100 ns turn-on delay. Use Value: VCE(sat) ≤ 0.25 V minimizes voltage drop and power loss, preserving noise margin in mixed-voltage systems. |
| Small-Relay Driver Stage | LED Current-Switching Interface |
|
Use Scenario: Driving 12 V, 400 mA coil relays in HVAC control panels where space constraints favor SMT solutions. IC Role / Device Role / Timing Role: Low-side switch with base resistor network limiting IB to 10 mA for guaranteed saturation. Use Value: IC = 500 mA rating exceeds relay hold current, allowing margin for cold-start inrush and aging effects. |
Use Scenario: Switching 20 mA indicator LEDs in medical device status panels requiring high reliability and low standby current. IC Role / Device Role / Timing Role: Constant-current switch with emitter resistor feedback for brightness stability. Use Value: ICBO ≤ 100 nA prevents false turn-on during deep sleep modes, extending battery life in portable diagnostics tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBTA05-TP (Micro Commercial) | VCEO = 60 V, IC = 500 mA, but hFE min = 85 @ IC = 10 mA - 15% lower guaranteed gain. | Less suitable for precision analog amplification; acceptable for digital switching where gain margin is non-critical. | Select when cost sensitivity outweighs gain consistency requirements in high-volume consumer controls. |
| PN2222A (ON Semiconductor) | Same SOT23 package, but VCEO = 40 V and PD = 350 mW on larger pad - lower voltage headroom, higher thermal capacity. | Not interchangeable in 60 V rail designs; preferred where board space allows larger thermal pads and voltage margin is ≤ 40 V. | Choose only after verifying VCE stress remains < 32 V (80% derating) and thermal layout supports 350 mW continuous dissipation. |
Compared with MMBTA05-7, MMBTA05-TP trades gain consistency for cost, while PN2222A offers higher power handling at reduced voltage capability - neither is pin- or spec-compatible without circuit revalidation.
Availability
MMBTA05-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, low-voltage logic translation, and small-relay driver circuits requiring stable component supply, RoHS 3 compliance, and SOT23 footprint continuity.
Supply support for MMBTA05-7 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The MMBTA05 series belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability applications in industrial automation, consumer electronics, and automotive subsystems where robustness and regulatory compliance are mandatory.
FAQ
What is the maximum allowable collector-emitter voltage for MMBTA05-7 in continuous DC operation?
The absolute maximum VCEO is 60 V at TA = 25°C with IB = 0. Derating is required above 25°C: VCEO decreases linearly to zero at +150°C, per the datasheet's temperature coefficient of -0.5 V/°C beyond 25°C.
Can MMBTA05-7 replace BC847B in existing SOT23 designs?
Yes, with verification: both are NPN SOT23 transistors, but MMBTA05-7 has higher VCEO (60 V vs. 45 V) and higher IC (500 mA vs. 100 mA). Ensure the original BC847B design does not rely on its tighter hFE distribution (160–450 vs. MMBTA05-7's min 100), especially in linear amplifiers.
Is MMBTA05-7 qualified for automotive applications?
No - the standard MMBTA05-7 is not AEC-Q101 qualified. Diodes offers the automotive-compliant MMBTA05Q variant (separate datasheet DS30037Q) with extended temperature testing (-40°C to +150°C), enhanced ESD robustness, and PPAP documentation.
What is the recommended PCB pad layout for optimal thermal performance?
For 310 mW dissipation, use the minimum recommended pad layout per DS30037: 1 oz copper on single-sided FR4 with dimensions matching Diodes' SOT23 footprint (C = 2.0 mm × 0.8 mm, X1 = 1.35 mm, Y = 0.9 mm). Larger copper areas (e.g., 15 mm × 15 mm) reduce RθJA to 357 °C/W.
MMBTA05-7 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:
- Discontinued at Digi-Key
- Transistor Type:
- NPN
- 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
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBTA05-7 FAQ
1.How can I place an order for MMBTA05-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBTA05-7 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 MMBTA05-7 reliable?
The price and inventory of MMBTA05-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA05-7 is usually 5 days.
3.What payment methods are accepted for MMBTA05-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA05-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBTA05-7?
MMBTA05-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBTA05-7 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 MMBTA05-7?
For technical support, including MMBTA05-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA05-7 requirements.
6.How does Aetrix verify that MMBTA05-7 is sourced from the original manufacturer or authorized distributors?
All MMBTA05-7 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 MMBTA05-7 meets industry standards.
7.What is the process for return or replacement of MMBTA05-7?
All MMBTA05-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA05-7, 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 MMBTA05-7 part is unused and in its original packaging.
Return procedure for MMBTA05-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBTA05-7 Tags
-
MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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