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Diodes Incorporated BCX5110TA
- Part No.:
- BCX5110TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX5110TA.pdf
- Description:
- TRANS PNP 45V 1A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,067
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Product details
Overview
BCX5110TA from Diodes Incorporated is a PNP medium-power transistor in SOT89 package, rated for -45V VCEO, -1A continuous collector current, and < -500mV VCE(sat) at -0.5A - used in AF driver stages and medium-power switching circuits requiring robust thermal performance on 15mm×15mm copper.
For engineers reviewing the BCX5110TA datasheet, BCX5110TA pinout, BCX5110TA application, or BCX5110TA equivalent, this page delivers verified electrical parameters, SOT89 terminal mapping, thermal derating curves, complementary NPN pairing (BCX54), and automotive-grade sourcing context per AEC-Q101 readiness.
Technical Context
This PNP bipolar junction transistor operates with fixed-current gain (hFE = 25–250) across -5mA to -500mA collector loads at VCE = -2V, supporting linear amplification and saturated switching modes. Its low saturation voltage enables efficient power control in discrete output stages.
Thermal design relies on exposed collector pad conduction: RθJL = 13°C/W to solder point and RθJC = 27°C/W to case, enabling 1W dissipation on minimal PCB copper (15mm×15mm 1oz FR4) under still-air conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -45 V - Maximum safe collector-emitter reverse bias before breakdown in common-emitter configuration. |
| IC (continuous) | -1 A - Sustained DC collector current without thermal runaway on standard PCB layout. |
| VCE(sat) | < -500 mV @ -0.5A/-50mA - Ensures < 250 mW conduction loss in saturated switch applications. |
| hFE | 25–250 - Stable DC current gain range supports predictable base drive sizing across operating temperatures (-55°C to +150°C). |
| fT | 150 MHz - Supports audio-frequency amplification and fast-switching control up to ~10 MHz practical bandwidth. |
| RθJA | 125 °C/W - Junction-to-ambient thermal resistance defines maximum ambient temperature for 1W operation on minimal copper. |
| ESD HBM | 4000 V - Robust handling tolerance during board assembly and rework without special ESD precautions. |
Pinout & Package
Package: SOT89 - surface-mount plastic package with exposed collector pad for thermal conduction; 3-terminal configuration; 0.052 g mass; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current sink path | Exposed metal pad - must be soldered to ≥15mm×15mm copper pour for rated 1W dissipation. |
| Emitter (E) | Current source reference node | Connected to system ground or negative rail; carries full load current with minimal voltage drop. |
| Base (B) | Control input | Receives current-limited drive (≤ -100mA continuous); requires series resistor to limit IB per hFE target. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | Enables <250 mW conduction loss at 0.5A, reducing heat generation in compact drivers. |
| High VCEO rating | Supports -45V rail operation in industrial power supplies and automotive subsystems. |
| Thermally optimized SOT89 | Exposed collector pad achieves 13°C/W junction-to-lead resistance for direct PCB heat sinking. |
| AEC-Q101 readiness | Manufactured in IATF 16949 facilities; PPAP-capable for automotive applications requiring change control. |
Applications
| Audio Frequency Driver | Medium-Power Switch |
|---|---|
Use Scenario: Driving 8Ω speaker loads in Class-B amplifier output stage with ±12V rails. IC Role / Device Role / Timing Role: PNP complement to NPN output pair; provides negative half-cycle current sourcing. Use Value: Low VCE(sat) minimizes crossover distortion and thermal stress at 0.5A peak output. | Use Scenario: Controlling 24V solenoid actuator (1.2A hold, 2A inrush) in industrial PLC I/O module. IC Role / Device Role / Timing Role: Discrete high-side switch with base-driven saturation control. Use Value: -45V VCEO margin prevents breakdown during inductive kickback; 2A ICM handles startup surge. |
| Automotive Interior Lighting | DC-DC Converter Bias Stage |
Use Scenario: Dimmable LED string control (12V, 350mA) in vehicle cabin lighting with PWM modulation. IC Role / Device Role / Timing Role: Linear current regulator in emitter-follower configuration. Use Value: Stable hFE over -40°C to +125°C ensures consistent dimming linearity across temperature. | Use Scenario: Providing regulated bias current to gate driver IC in 48V→12V buck converter auxiliary supply. IC Role / Device Role / Timing Role: Constant-current source for reference voltage generation. Use Value: 150MHz fT ensures stable regulation up to 100kHz switching frequency without phase lag. |
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 |
|---|---|---|---|
| BCX51TA | Identical die, same SOT89 package, identical marking code "AA"; differs only in reel size (1000 vs 4000 pcs). | No functional difference; suitable for same AF driver and switching roles. | Select BCX51TA for smaller-batch prototyping; BCX5110TA aligns with standard 1000-piece tape-and-reel logistics. |
| MJD2955G | TO-220 package, -60V VCEO, -10A IC, higher thermal mass but larger footprint. | Used where >1W continuous dissipation or mechanical mounting is required. | Choose MJD2955G only when PCB space allows TO-220 and >1W average power is needed; not drop-in compatible. |
Compared with BCX51TA, BCX5110TA offers identical electrical performance with standardized 1000-unit reel packaging; versus MJD2955G, it trades higher current capability for SMT compatibility and lower profile - optimal for space-constrained audio and control modules.
Availability
BCX5110TA is available at Aetrix Electronics and suitable for audio frequency drivers, medium-power switches, and automotive interior lighting systems requiring stable component supply with traceable green manufacturing.
Supply support for BCX5110TA 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.
The BCX51/52/53 series targets medium-power linear and switching applications in industrial, automotive, and consumer electronics, emphasizing thermal efficiency, RoHS compliance, and AEC-Q101 readiness.
FAQ
What is the maximum continuous power dissipation for BCX5110TA on a standard PCB?
BCX5110TA dissipates up to 1W continuously when mounted on 15mm×15mm 1oz copper on FR4 with still air cooling. Derating begins above +25°C ambient at 8mW/°C, reaching zero dissipation at +125°C ambient per the datasheet's Fig.1 curve.
Is BCX5110TA pin-compatible with BCX54?
No - BCX5110TA is a PNP transistor while BCX54 is its complementary NPN counterpart. They share identical SOT89 pinout (C-E-B), but polarity reversal means direct substitution would invert circuit function and likely cause failure without redesign.
Does BCX5110TA meet AEC-Q101 requirements for automotive use?
BCX5110TA is manufactured in IATF 16949-certified facilities and supports PPAP documentation; however, Diodes specifies that formal AEC-Q101 qualification requires explicit part-number validation - contact Diodes or Aetrix for certified test reports before automotive deployment.
How does the SOT89 package improve thermal performance over SOT23?
The SOT89's exposed collector pad provides direct thermal path to PCB copper, achieving RθJL = 13°C/W - over 3× better than typical SOT23 RθJA. This allows 1W operation where SOT23 would thermally saturate below 300mW on equivalent layout.
BCX5110TA 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):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 63 @ 150mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
BCX5110TA FAQ
1.How can I place an order for BCX5110TA through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX5110TA 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 BCX5110TA reliable?
The price and inventory of BCX5110TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX5110TA is usually 5 days.
3.What payment methods are accepted for BCX5110TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX5110TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX5110TA?
BCX5110TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX5110TA 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 BCX5110TA?
For technical support, including BCX5110TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX5110TA requirements.
6.How does Aetrix verify that BCX5110TA is sourced from the original manufacturer or authorized distributors?
All BCX5110TA 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 BCX5110TA meets industry standards.
7.What is the process for return or replacement of BCX5110TA?
All BCX5110TA units undergo pre-shipment inspection (PSI). If there is an issue with BCX5110TA, 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 BCX5110TA part is unused and in its original packaging.
Return procedure for BCX5110TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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