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Nexperia USA Inc. BCX56TF
- Part No.:
- BCX56TF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX56TF.pdf
- Description:
- TRANS NPN 80V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:836
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Product details
Overview
BCX56TF from Nexperia is an AEC-Q101-qualified NPN power bipolar transistor in SOT89 (SC-62) package, rated for 80 V VCEO, 1 A continuous collector current, and 500 mW power dissipation at Tamb ≤ 25 °C on standard FR4 PCB - used as low-side switch and MOSFET driver in automotive linear regulators.
For engineers reviewing the BCX56TF datasheet, BCX56TF pinout, BCX56TF application, or BCX56TF equivalent, this page delivers verified electrical parameters, thermal derating curves, hFE bins (63–250), junction-to-ambient thermal resistance (250 K/W), and real-world use cases in power management circuits requiring stable gain and high pulse current capability (ICM = 2 A).
Technical Context
This device operates as a medium-power NPN switching transistor with DC current gain binned across three variants (BCX56T/−10T/−16T); BCX56TF corresponds to the standard-gain version (hFE = 63–250 at VCE = 2 V, IC = 150 mA, pulsed). It supports linear and saturated-mode operation with VCE(sat) ≤ 500 mV at IC = 500 mA / IB = 50 mA.
Thermal performance is defined across three PCB mounting conditions: standard footprint (Rth(j-a) = 250 K/W), 1 cm² collector pad (157 K/W), and 6 cm² pad (114 K/W). Its fT = 155 MHz enables moderate-frequency switching in driver stages without parasitic oscillation risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 80 V - maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch designs. |
| IC | 1 A continuous - usable DC load current capacity under specified thermal conditions (FR4, 25 °C ambient). |
| hFE | 63–250 - guaranteed DC current gain range at VCE = 2 V, IC = 150 mA (pulsed); enables predictable base drive sizing. |
| VCE(sat) | ≤ 500 mV at IC = 500 mA / IB = 50 mA - ensures low conduction loss and minimal self-heating in saturated switching. |
| Ptot | 500 mW (standard FR4) - sets practical power handling ceiling before thermal derating; requires layout-aware copper area planning. |
| fT | 155 MHz - transition frequency enabling reliable operation up to ~10–20 MHz switching in gate-driving applications. |
| Rth(j-a) | 250 K/W - junction-to-ambient thermal resistance on standard footprint; informs heatsinking requirements for sustained 1 A loads. |
Pinout & Package
SOT89 (SC-62) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, single-sided copper FR4 mounting. Collector tab is electrically connected to Pin 2 and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current return path; tied to ground or low-side reference in switch configurations; influences saturation voltage and thermal coupling. |
| 2 | Collector (C) | Main power output node; electrically and thermally connected to exposed metal tab; must be routed to adequate copper area for heat dissipation. |
| 3 | Base (B) | Control input; requires current-limited drive (max IB = 200 mA DC, 300 mA peak) to avoid second breakdown during switching. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for under-hood power modules. |
| Three hFE bins | BCX56T (63–250), BCX56-10T (63–160), BCX56-16T (100–250) - allows precise base drive optimization across production lots and thermal conditions. |
| High ICM | 2 A peak collector current (tp ≤ 1 ms) - supports short-duration surge loads like motor startup or capacitor charging without failure. |
| Low VBE | ≤ 1 V at IC = 500 mA - reduces base drive power loss and eases compatibility with 3.3 V or 5 V logic-level controllers. |
| Thermally enhanced SOT89 | Exposed collector tab with 114–250 K/W Rth(j-a) range - enables scalable thermal design from minimal footprint to 6 cm² copper pads. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
|
Use Scenario: Pass transistor in adjustable 3-terminal linear regulator (e.g., LM317-based) delivering up to 1 A at 5–24 V output. IC Role / Device Role / Timing Role: NPN series pass element controlling output voltage via base bias; operates in linear region with dynamic thermal load. Use Value: Stable hFE binning ensures consistent dropout voltage and thermal response across production units; 80 V rating supports wide-input industrial supplies. |
Use Scenario: Level-shifting and current-boosting stage driving N-channel MOSFET gates in buck converter or motor H-bridge. IC Role / Device Role / Timing Role: Low-side NPN switch sinking gate charge during turn-off; fast fT and low VCE(sat) minimize switching losses. Use Value: 2 A peak current handles large gate capacitance (e.g., 5 nF) with <100 ns fall time; AEC-Q101 compliance ensures reliability in automotive DC-DC modules. |
| Low-Side Switches | Power Amplifiers |
|
Use Scenario: High-current load switch for solenoids, relays, or LED arrays in vehicle body control modules (BCM). IC Role / Device Role / Timing Role: Saturated NPN switch controlled by microcontroller GPIO; handles repetitive 1 A DC or pulsed loads. Use Value: Guaranteed VCE(sat) ≤ 500 mV limits power loss to <500 mW at full load; SOT89 thermal pad simplifies mechanical integration into compact BCM PCBs. |
Use Scenario: Class-A or AB audio preamplifier stage or sensor signal conditioning amplifier in automotive cabin electronics. IC Role / Device Role / Timing Role: Linear amplification element biased in active region; leverages wide hFE range for stable DC operating point. Use Value: Low leakage (ICBO ≤ 100 nA) and tight V(BR)CEO tolerance (80 V min) ensure signal integrity and rail-headroom margin in noisy environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX653 | Higher VCEO (100 V), lower hFE (20–200), TO-92 package | Lacks AEC-Q101 qualification; unsuitable for automotive; limited thermal performance vs. SOT89 | Select when higher voltage headroom is needed and automotive qualification is not required. |
| BC817-40 | Lower VCEO (45 V), same SOT-23 package, hFE = 250–630 | Not rated for 1 A continuous; max IC = 500 mA; insufficient for linear regulator pass devices | Use only in low-power signal switching where gain consistency matters more than current capacity. |
Compared with ZTX653 and BC817-40, BCX56TF uniquely combines automotive qualification, 1 A continuous rating, SOT89 thermal scalability, and guaranteed hFE range - making it the only drop-in solution for AEC-compliant 80 V, 1 A low-side power switching.
Availability
BCX56TF is available at Aetrix Electronics and suitable for automotive body control modules, industrial linear regulators, and embedded MOSFET driver circuits requiring stable component supply, AEC-Q101 compliance, and SMT manufacturability.
Supply support for BCX56TF 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
Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components - delivering high-performance, reliable, and scalable discrete and logic solutions.
BCX56TF belongs to Nexperia's AEC-Q101-qualified power transistor portfolio, engineered for automotive and industrial power management applications demanding robustness, thermal stability, and precise gain control in compact SMT packages.
FAQ
What is the maximum allowable base current for continuous operation?
The absolute maximum DC base current (IB) is 200 mA per the datasheet Limiting Values table. Exceeding this risks metallization failure or bond wire degradation. For reliable 1 A collector operation with hFE ≥ 63, typical design uses IB = 15–25 mA - well within safe margin and compatible with standard MCU GPIO drivers.
Can BCX56TF replace BCX56-16T in a design?
No - BCX56TF corresponds to the standard-gain variant (hFE = 63–250), while BCX56-16T has a higher minimum hFE of 100. Substituting may cause insufficient base drive in high-current saturated applications, leading to elevated VCE(sat) and thermal runaway. Gain binning is not interchangeable without circuit revalidation.
Is the collector tab electrically isolated from other pins?
No - the collector (Pin 2) is directly connected to the exposed metal tab. This tab must be routed to the collector net and cannot serve as a thermal pad tied to ground or chassis. Isolation requires insulating thermal interface material if mounting to a grounded heatsink.
How does PCB copper area affect BCX56TF's power handling?
Power dissipation scales with copper area: 500 mW at 25 °C ambient on standard footprint, 800 mW with 1 cm² collector pad, and 1100 mW with 6 cm² pad. Derating curves show linear reduction above 25 °C - e.g., at 75 °C ambient, max power drops to ~300 mW on standard layout, but remains >600 mW with 6 cm² copper.
BCX56TF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- 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:
- 63 @ 150mA, 2V
- Power - Max:
- 500 mW
- Frequency - Transition:
- 155MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX56TF FAQ
1.How can I place an order for BCX56TF through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX56TF 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 BCX56TF reliable?
The price and inventory of BCX56TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX56TF is usually 5 days.
3.What payment methods are accepted for BCX56TF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX56TF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX56TF?
BCX56TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX56TF 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 BCX56TF?
For technical support, including BCX56TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX56TF requirements.
6.How does Aetrix verify that BCX56TF is sourced from the original manufacturer or authorized distributors?
All BCX56TF 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 BCX56TF meets industry standards.
7.What is the process for return or replacement of BCX56TF?
All BCX56TF units undergo pre-shipment inspection (PSI). If there is an issue with BCX56TF, 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 BCX56TF part is unused and in its original packaging.
Return procedure for BCX56TF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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