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Diodes Incorporated BCX6925TA
- Part No.:
- BCX6925TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX6925TA.pdf
- Description:
- TRANS PNP 20V 1A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,140
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Product details
Overview
BCX6925TA from Diodes Incorporated is a 20V PNP medium-power bipolar junction transistor in SOT89 package, rated for -1A continuous collector current and -2A peak pulse current, with VCE(sat) < -0.5V at -1A/-100mA drive, used in automotive load switching and industrial DC-DC converter output stages.
For engineers reviewing the BCX6925TA datasheet, BCX6925TA pinout, BCX6925TA application, or BCX6925TA equivalent, key selection criteria include guaranteed hFE (160–400 at -0.5A), fT = 100MHz, low saturation voltage under high-current switching, and AEC-Q101 qualification readiness for automotive-grade thermal cycling and humidity robustness.
Technical Context
This PNP transistor operates in linear or saturated switching mode with fixed emitter-base and collector-base breakdown limits (VEBO = -5V, VCBO = -25V) and supports pulsed operation up to 2A with ≤2% duty cycle. Its fT of 100MHz enables use in medium-frequency amplifier and oscillator bias networks.
Thermal performance is specified for 15mm × 15mm × 0.6mm FR4 PCB with 1oz copper; PD = 1W at +25°C ambient, derating linearly above +25°C with θJA ≈ 125°C/W. Moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -20V - Maximum safe collector-emitter voltage before avalanche conduction in common-emitter configuration |
| IC (cont.) | -1A - Continuous DC collector current capability without thermal runaway on standard PCB layout |
| VCE(sat) | < -0.5V @ -1A/-100mA - Ensures < 0.5W conduction loss in high-side switch applications |
| hFE | 160–400 @ -0.5A/-1V - Supports stable current gain across production lots for analog feedback and driver stages |
| fT | 100MHz @ -100mA/-5V - Enables use in RF pre-driver and broadband amplifier bias circuits |
| PD | 1W @ +25°C - Power dissipation limit on defined FR4 test board; requires heatsinking above ~0.5W in enclosure |
| θJA | ≈125°C/W - Thermal resistance from junction to ambient under specified mounting conditions |
Pinout & Package
Package: SOT89 - Surface-mount plastic package with exposed thermal pad (pin 2), 3-terminal outline, UL 94V-0 rated molding compound, 0.05g mass, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | E | Current exit terminal; connected to higher potential rail in high-side switch configurations |
| Pin 2 (Collector) | C | Main current sink terminal; electrically tied to exposed thermal tab for enhanced heat transfer |
| Pin 3 (Base) | B | Control input; requires -100mA drive for full saturation at -1A IC |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | < -0.5V at rated IC, reducing conduction loss in power-switching nodes |
| High hFE range | 160–400 ensures predictable base drive requirements across temperature and process variation |
| SOT89 thermal pad | Pin 2 doubles as thermal interface to PCB copper, enabling 1W operation without external heatsink |
| AEC-Q101 readiness | Manufactured in IATF 16949 facilities; supports PPAP documentation for automotive qualification paths |
Applications
| Automotive Door Module Driver | Industrial 24V Relay Interface |
|---|---|
Use Scenario: Driving window lift motor control logic in door ECU with reverse-polarity protection. IC Role / Device Role / Timing Role: PNP high-side switch controlling 12V/0.8A solenoid actuator via microcontroller GPIO. Use Value: VCE(sat) < -0.5V minimizes heat generation during sustained 0.8A activation; SOT89 thermal pad maintains TJ < +125°C. | Use Scenario: Isolating PLC output signals from 24V relay coils in factory automation panels. IC Role / Device Role / Timing Role: Medium-power level-shifting switch translating 3.3V logic to 24V coil drive. Use Value: hFE ≥ 160 ensures reliable turn-on with ≤5mA base current; -20V VCEO withstands relay flyback transients. |
| DC-DC Converter Pre-regulator | LED String Current Sink |
Use Scenario: Linear pre-regulation stage ahead of buck converter in automotive infotainment power supply. IC Role / Device Role / Timing Role: Adjustable current source setting reference voltage for downstream PWM controller. Use Value: fT = 100MHz supports stable loop response up to 10kHz; tight hFE tolerance reduces calibration drift. | Use Scenario: Constant-current sink for 350mA LED strings in commercial signage with dimming control. IC Role / Device Role / Timing Role: Analog current regulator driven by DAC voltage through emitter-follower configuration. Use Value: VCE(sat) < -0.5V allows >10V headroom for string voltage variation; -1A rating supports overcurrent margin. |
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 |
|---|---|---|---|
| BCX6916TA | VCEO = -16V, hFE = 100–250, same SOT89 package | Lower voltage rating limits use in 24V systems with transients | Select when cost sensitivity outweighs 20V margin requirement |
| MMBT6427LT1G | VCEO = -20V, IC = -0.5A, SOT23 package, hFE = 100–300 | Lower current rating and smaller package reduce thermal capacity | Choose only for space-constrained designs where 0.5A suffices |
Compared with BCX6925TA, BCX6916TA trades 4V VCEO margin for lower cost, while MMBT6427LT1G sacrifices 50% current capacity and thermal performance for SOT23 footprint reduction-neither offers identical combination of -1A, -20V, and SOT89 thermal robustness.
Availability
BCX6925TA is available at Aetrix Electronics and suitable for automotive body electronics, industrial relay interfaces, and DC-DC pre-regulator circuits requiring stable component supply with traceable RoHS/Green compliance.
Supply support for BCX6925TA 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 BCX6925TA belongs to Diodes' BCX69 series of medium-power PNP transistors, designed specifically for automotive and industrial switching applications demanding high current, low saturation voltage, and robust thermal performance in compact surface-mount packages.
FAQ
What is the maximum allowable junction temperature for BCX6925TA?
The BCX6925TA has an operating junction temperature range of -55°C to +150°C per its Absolute Maximum Ratings table. This limit applies under steady-state conditions with proper PCB thermal design; exceeding +150°C risks permanent degradation of hFE and increased leakage currents.
Is BCX6925TA qualified to AEC-Q101?
BCX6925TA is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not pre-qualified to AEC-Q101. Customers requiring formal qualification must initiate a joint qualification program with Diodes Incorporated and submit sample lots for stress testing per AEC-Q101 Rev D.
Can BCX6925TA replace BCX6927 in existing designs?
No-BCX6927 has VCEO = -45V and hFE = 100–250, making it unsuitable as a drop-in replacement for BCX6925TA's -20V/160–400 specification set. Substitution would require revalidation of saturation voltage, gain stability, and transient voltage margin in the target circuit.
What is the recommended PCB pad layout for SOT89 thermal performance?
Diodes specifies a minimum 15mm × 15mm single-sided 1oz copper area connected directly to Pin 2 (collector/thermal tab). The pad should match the SOT89 outline dimensions (D = 4.50mm, E = 2.50mm) with solder mask defined to maximize thermal transfer; no thermal relief on the collector pad is advised for optimal 1W dissipation.
BCX6925TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 160 @ 500mA, 1V
- Power - Max:
- 1 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
BCX6925TA FAQ
1.How can I place an order for BCX6925TA through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX6925TA 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 BCX6925TA reliable?
The price and inventory of BCX6925TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX6925TA is usually 5 days.
3.What payment methods are accepted for BCX6925TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX6925TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX6925TA?
BCX6925TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX6925TA 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 BCX6925TA?
For technical support, including BCX6925TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX6925TA requirements.
6.How does Aetrix verify that BCX6925TA is sourced from the original manufacturer or authorized distributors?
All BCX6925TA 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 BCX6925TA meets industry standards.
7.What is the process for return or replacement of BCX6925TA?
All BCX6925TA units undergo pre-shipment inspection (PSI). If there is an issue with BCX6925TA, 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 BCX6925TA part is unused and in its original packaging.
Return procedure for BCX6925TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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