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Nexperia USA Inc. BCX55-16,135
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- Part No.:
- BCX55-16,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX55-16,135.pdf
- Description:
- TRANS NPN 60V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:2,345
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Product details
Overview
BCX55-16,135 from Nexperia is an NPN medium power transistor in SOT89 (SC-62) package, rated for 60 V VCEO, 1 A continuous collector current, and hFE of 100–250 at IC = 150 mA, designed for linear voltage regulation, low-side switching, and MOSFET driver stages in battery-powered and industrial power management circuits.
For engineers reviewing the BCX55-16,135 datasheet, BCX55-16,135 pinout, BCX55-16,135 application, or BCX55-16,135 equivalent, this device is selected for its exposed heatsink pad enabling 1.35 W total power dissipation on 6 cm² copper, high-current gain consistency across temperature, and robust 2 A peak pulse capability in compact SMD form.
Technical Context
This transistor operates as a medium-power NPN switch or linear amplifier with fixed-emitter configuration, supporting DC and pulsed operation up to 150 °C junction temperature. Its design emphasizes thermal performance via an exposed collector pad and supports stable hFE over -55 °C to +100 °C ambient range.
It delivers 100–250 DC current gain at VCE = 2 V and IC = 150 mA under pulsed conditions (tp ≤ 300 μs, duty ≤ 0.02), with VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA and fT = 100–180 MHz - enabling use in both switching and RF-coupled driver applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in linear regulators and switch-mode drivers. |
| IC (continuous) | 1 A - Continuous DC collector current rating; supports load switching up to ~12 W at 12 V with adequate heatsinking. |
| hFE | 100–250 at VCE = 2 V, IC = 150 mA - Tight current gain bin ensures predictable base drive requirements in amplifier and switch designs. |
| Ptot | 1.35 W - Achievable only with 6 cm² copper pad; enables higher sustained power than standard SOT89 without forced cooling. |
| Rth(j-sp) | 16 K/W - Low junction-to-solder-point thermal resistance confirms efficient heat transfer through exposed collector pad to PCB. |
| fT | 100–180 MHz - Supports high-frequency signal amplification and fast-switching gate driving up to ~10 MHz square waves. |
| VBE | ≤ 1 V at IC = 500 mA - Enables low-voltage base drive compatibility with 3.3 V and 5 V logic controllers. |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed collector pad for thermal and electrical conduction; 3-pin flat-lead outline measuring 4.6 mm × 2.6 mm × 1.8 mm, optimized for reflow soldering with standardized footprint per Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Reference node for current flow; connected to ground or low-side return path in switch configurations. |
| 2 | Collector | Main power output terminal; electrically and thermally tied to exposed pad for direct PCB heat sinking and low-inductance routing. |
| 3 | Base | Control input requiring ~50 mA drive for full saturation; sensitive to ESD and requires series resistor in digital interface. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Enables 1.35 W power dissipation with 6 cm² copper area - 2.7× higher than standard SOT89 footprint. |
| Three hFE bins | BCX55-16 offers 100–250 gain range - reduces base drive variance across production batches in critical analog feedback paths. |
| High VCEO/VCBO | 60 V rating supports 24 V industrial rails and 48 V telecom systems without derating for transient spikes. |
| Low VCE(sat) | ≤ 0.5 V at IC/IB = 10 - minimizes conduction loss in linear regulators and improves efficiency in discrete driver stages. |
| 150 °C Tj max | Allows operation in sealed enclosures or high-ambient environments (e.g., automotive under-hood auxiliary circuits). |
Applications
| Linear Voltage Regulators | Low-Side Switches |
|---|---|
|
Use Scenario: Discrete pass transistor in adjustable 3-terminal linear regulators delivering up to 1 A at 5–24 V output. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias from error amplifier; handles full load current and dissipates excess power. Use Value: Stable regulation under varying load due to consistent hFE binning and low thermal resistance prevents thermal runaway during sustained 1 A operation. |
Use Scenario: High-side or low-side load switch controlling solenoids, relays, or LED strings in battery-powered tools and instrumentation. IC Role / Device Role / Timing Role: Medium-power switching transistor driven by microcontroller GPIO; toggles loads up to 1 A at 24 V. Use Value: Fast turn-on/turn-off enabled by 180 MHz fT and low VBE allows PWM dimming up to 10 kHz without significant switching loss. |
| MOSFET Drivers | Battery-Driven Devices |
|
Use Scenario: Gate driver stage for N-channel power MOSFETs in DC-DC converters and motor H-bridges. IC Role / Device Role / Timing Role: Current-amplifying buffer between logic-level controller and MOSFET gate; supplies peak gate charge current. Use Value: 2 A peak collector current supports rapid gate charging of 10 nF MOSFETs within <100 ns, reducing switching transition time and conduction loss. |
Use Scenario: Power path control and battery discharge monitoring in portable medical devices and handheld test equipment. IC Role / Device Role / Timing Role: Load switch and current-sense amplifier front-end transistor; interfaces with precision shunt-based sensing circuitry. Use Value: Low VCE(sat) preserves battery runtime; tight hFE tolerance ensures repeatable current mirror accuracy in analog measurement paths. |
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 |
|---|---|---|---|
| BCX55-10,135 | hFE = 63–160 (lower mid-range gain); identical VCEO, IC, package, and thermal specs. | Suitable where lower base drive sensitivity is acceptable, e.g., fixed-bias switches with marginally stable supply rails. | Select when gain consistency at low IC (<50 mA) is less critical than cost optimization. |
| BCP56-16,115 | SOT223 package; same hFE range but higher Ptot = 1.5 W (with larger pad); 20% larger footprint and 3× higher Rth(j-a). | Better suited for high-reliability industrial controls needing >1.35 W dissipation without custom layout. | Choose when board space permits larger package and long-term thermal margin outweighs SOT89's compactness. |
Compared with BCX55-10,135, BCX55-16,135 provides higher minimum hFE for tighter base current control; versus BCP56-16,115, it trades thermal headroom for smaller footprint and faster assembly - ideal for space-constrained battery-powered designs.
Availability
BCX55-16,135 is available at Aetrix Electronics and suitable for linear voltage regulators, low-side switches, and MOSFET drivers requiring stable component supply, consistent hFE binning, and reliable thermal performance in SMT production.
Supply support for BCX55-16,135 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 high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BCX55 series belongs to Nexperia's medium-power bipolar transistor product line, engineered for robust performance in power management and switching applications where thermal efficiency and gain stability are critical.
FAQ
What is the maximum continuous collector current for BCX55-16,135?
The BCX55-16,135 is rated for 1 A continuous collector current (IC) under specified thermal conditions: mounted on FR4 PCB with 6 cm² copper pad for collector. At ambient temperatures above 25 °C, power derating applies per Figure 1 - e.g., 0.95 W at 75 °C ambient limits usable IC to ~950 mA at VCE = 1 V.
How does the exposed pad on the SOT89 package affect thermal performance?
The exposed collector pad in the SOT89 package directly connects the die to the PCB copper, achieving Rth(j-sp) = 16 K/W - significantly lower than non-exposed alternatives. When soldered to ≥6 cm² of 35 µm copper, it enables 1.35 W total power dissipation, making it suitable for sustained 1 A operation without heatsinks in well-designed layouts.
Can BCX55-16,135 replace BCX55-10,135 in existing designs?
Yes, BCX55-16,135 is pin-compatible and electrically interchangeable with BCX55-10,135, differing only in hFE bin (100–250 vs. 63–160). In circuits relying on minimum gain for saturation, BCX55-16,135 may reduce required base drive current by up to 40%, improving noise immunity and reducing GPIO loading.
What is the typical transition frequency (fT) and how does it impact switching speed?
The BCX55-16,135 has fT = 100–180 MHz at VCE = 5 V, IC = 50 mA. This enables usable switching up to ~10 MHz in small-signal applications and supports fast gate charging for MOSFETs with ≤10 nF gate capacitance - achieving <100 ns rise/fall times when driven with 50 mA base current.
BCX55-16,135 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):
- 60 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:
- 1.25 W
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX55-16,135 FAQ
1.How can I place an order for BCX55-16,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX55-16,135 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 BCX55-16,135 reliable?
The price and inventory of BCX55-16,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX55-16,135 is usually 5 days.
3.What payment methods are accepted for BCX55-16,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX55-16,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX55-16,135?
BCX55-16,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX55-16,135 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 BCX55-16,135?
For technical support, including BCX55-16,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX55-16,135 requirements.
6.How does Aetrix verify that BCX55-16,135 is sourced from the original manufacturer or authorized distributors?
All BCX55-16,135 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 BCX55-16,135 meets industry standards.
7.What is the process for return or replacement of BCX55-16,135?
All BCX55-16,135 units undergo pre-shipment inspection (PSI). If there is an issue with BCX55-16,135, 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 BCX55-16,135 part is unused and in its original packaging.
Return procedure for BCX55-16,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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