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Diodes Incorporated BCX5316QTA
- Part No.:
- BCX5316QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX5316QTA.pdf
- Description:
- TRANS PNP 80V 1A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:194
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Product details
Overview
BCX5316QTA from Diodes Incorporated is a PNP medium-power bipolar junction transistor (BJT) in SOT89 package, rated for -80V VCEO, -1A continuous collector current, and -500mV VCE(sat) @ -0.5A. It serves as a high-reliability switching or amplification device in automotive power stages, meeting AEC-Q101 qualification and IATF16949 manufacturing requirements.
For engineers reviewing the BCX5316QTA datasheet, BCX5316QTA pinout, BCX5316QTA application, or BCX5316QTA equivalent, key selection criteria include its -80V breakdown rating, thermal resistance of 60°C/W on 50mm×50mm copper, complementary pairing with BCX5616Q, and suitability for automotive load switching where low saturation voltage and high-temperature operation up to +150°C are critical.
Technical Context
This PNP BJT operates in linear or saturated switching modes with DC current gain (hFE) ranging from 25 at -5mA to 250 at -500mA, enabling stable biasing across wide collector current ranges. Its fT of 150MHz supports moderate-frequency amplification tasks in audio and control signal paths.
The device features an exposed collector pad thermally coupled to PCB copper, delivering RθJL = 13°C/W and scalable power dissipation (1W–2W) depending on copper area-critical for automotive under-hood thermal management without heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -80V - Withstands reverse collector-emitter voltage up to 80V in blocking state, suitable for 24V automotive systems with load-dump transients. |
| IC (continuous) | -1A - Supports steady-state switching of medium-power loads such as solenoids, relays, and LED drivers without derating below 100°C ambient. |
| VCE(sat) | < -500mV @ -0.5A - Minimizes conduction loss and self-heating during saturation, reducing thermal stress in high-duty-cycle applications. |
| hFE | 25–250 - Provides predictable base drive requirements across operating range, simplifying gate/base driver design for consistent turn-on behavior. |
| RθJA | 60°C/W - Achieved with 50mm×50mm 1oz copper; enables 2W power handling at +70°C ambient, eliminating need for external heatsinking in compact modules. |
| AEC-Q101 | Qualified - Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per AEC standard, supporting PPAP submission. |
Pinout & Package
Package: SOT89 - Surface-mount plastic package with exposed collector pad for enhanced thermal performance; UL 94V-0 rated, matte tin-plated terminals, 0.055g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current sink terminal | Exposed metal pad on underside - must be soldered to large copper pour for thermal conduction and electrical connection. |
| Emitter (E) | Current source reference node | Connected to system ground or negative rail; forms return path for load current in high-side switch configurations. |
| Base (B) | Control input for transistor biasing | Receives current-limited drive signal; requires ~50mA base current to saturate at -500mA collector load. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | < -500mV @ -0.5A - Reduces power loss by >30% vs. comparable PNP transistors, lowering thermal footprint in space-constrained ECUs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability - eliminates need for additional qualification testing in Tier-1 module designs. |
| Complementary NPN pairing | BCX5616Q - Enables matched push-pull output stages with symmetrical voltage/current ratings and thermal profiles. |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant - satisfies EU automotive material compliance requirements without supply chain substitution risk. |
Applications
| Automotive Body Control Module (BCM) | Industrial Relay Driver |
|---|---|
|
Use Scenario: Switching 12V/24V solenoid valves and window lift motors in BCMs under extended temperature cycling (-40°C to +125°C). IC Role / Device Role / Timing Role: High-side PNP switch controlling load current path to ground, driven by microcontroller GPIO via current-limiting resistor. Use Value: -80V VCEO withstands ISO 7637-2 pulse 5a transients; low VCE(sat) limits self-heating during 100% duty cycle operation. |
Use Scenario: Driving industrial 24VDC relays in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: Medium-power interface transistor translating logic-level signals to relay coil current, with flyback diode integration. Use Value: 2W power capability on standard PCB copper allows direct mounting without heatsink; AEC-Q101 grade ensures long-term field reliability in factory environments. |
| Automotive HVAC Blower Control | LED Lighting Power Stage |
|
Use Scenario: PWM-controlled blower motor speed regulation in automotive heating, ventilation, and air conditioning systems. IC Role / Device Role / Timing Role: Linear amplifier stage operating in active region to deliver precise analog current to motor windings. Use Value: Stable hFE across -5mA to -500mA enables accurate current mirroring; 150MHz fT supports clean PWM edge fidelity up to 20kHz. |
Use Scenario: Constant-current switching for high-brightness LED strings in exterior lighting (tail lamps, DRLs). IC Role / Device Role / Timing Role: Low-saturation switch regulating LED current through sense-resistor feedback loop. Use Value: -500mV VCE(sat) minimizes voltage headroom loss, increasing usable supply margin for multi-LED series strings powered from 12V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX951 | VCEO = -60V, IC = -1A, RθJA = 100°C/W (SOT89), no AEC-Q101 qualification | Limited to commercial/industrial use; unsuitable for automotive PPAP or high-temp under-hood deployment | Select only if AEC-Q101 is not required and thermal budget permits higher junction temperature rise. |
| MJD2955G | VCEO = -60V, IC = -10A, TO-220 package, RθJA = 40°C/W with heatsink | Requires external heatsink and larger board area; over-specified current rating increases cost and layout complexity | Prefer when >1A peak load current or forced-air cooling is available; avoid for space-constrained automotive modules. |
Compared with ZTX951 and MJD2955G, BCX5316QTA delivers optimal balance of automotive qualification, thermal efficiency in SOT89, and precise -80V/1A rating-making it the preferred choice for compact, high-reliability 24V load switching where qualification and board space are primary constraints.
Availability
BCX5316QTA is available at Aetrix Electronics and suitable for automotive body control modules, industrial relay drivers, HVAC blower control circuits, and LED lighting power stages requiring stable component supply with full traceability and lifecycle support.
Supply support for BCX5316QTA 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 components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF16949 certified facilities.
The BCX5316QTA belongs to Diodes' automotive-qualified BJT portfolio, engineered specifically for robust medium-power switching in harsh-environment applications where AEC-Q101 compliance, thermal resilience, and RoHS 3 green materials are mandatory.
FAQ
What is the maximum allowable junction temperature for BCX5316QTA?
The BCX5316QTA has an operating junction temperature range of -55°C to +150°C. Its absolute maximum rating is +150°C, verified per AEC-Q101 stress tests. Derating begins above +70°C ambient when mounted on 50mm×50mm 1oz copper, maintaining 2W power dissipation up to that point.
Is BCX5316QTA pin-compatible with BCX5216QTA?
Yes-both share identical SOT89 pinout (C/E/B) and mechanical dimensions. However, BCX5316QTA offers -80V VCEO and -100V VCBO, versus -60V/-60V for BCX5216QTA. Substitution requires verifying voltage margin in the target circuit, especially in load-dump scenarios.
Does BCX5316QTA require a base resistor for safe operation?
Yes-a current-limiting base resistor is mandatory to prevent excessive base current. At -500mA collector load, typical base current is -50mA; using a 220Ω resistor from a 5V MCU GPIO limits IB to ~18mA, ensuring safe saturation without overstressing the driver or transistor.
Can BCX5316QTA be used in linear amplifier configurations?
Yes-it exhibits stable hFE from 25 to 250 across -5mA to -500mA and maintains linearity in active region operation. Its fT of 150MHz supports audio-frequency amplification, but thermal design must account for continuous power dissipation in linear mode, especially above 100mA.
BCX5316QTA 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):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 150mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
BCX5316QTA FAQ
1.How can I place an order for BCX5316QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX5316QTA 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 BCX5316QTA reliable?
The price and inventory of BCX5316QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX5316QTA is usually 5 days.
3.What payment methods are accepted for BCX5316QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX5316QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX5316QTA?
BCX5316QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX5316QTA 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 BCX5316QTA?
For technical support, including BCX5316QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX5316QTA requirements.
6.How does Aetrix verify that BCX5316QTA is sourced from the original manufacturer or authorized distributors?
All BCX5316QTA 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 BCX5316QTA meets industry standards.
7.What is the process for return or replacement of BCX5316QTA?
All BCX5316QTA units undergo pre-shipment inspection (PSI). If there is an issue with BCX5316QTA, 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 BCX5316QTA part is unused and in its original packaging.
Return procedure for BCX5316QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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