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Nexperia USA Inc. BCX55,115
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- Part No.:
- BCX55,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX55,115.pdf
- Description:
- TRANS NPN 60V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:11,507
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Product details
Overview
BCX55,115 from Nexperia is an NPN medium power transistor in SOT89 (SC-62) package, rated for 60 V VCEO, 1 A continuous collector current, and 1.35 W total power dissipation with 6 cm² copper pad. It delivers hFE = 63–250 at IC = 150 mA, VCE = 2 V, and supports linear voltage regulators and MOSFET drivers requiring stable gain and thermal performance.
For engineers reviewing the BCX55,115 datasheet, BCX55,115 pinout, BCX55,115 application, or BCX55,115 equivalent, this device is selected for low-side switching, battery-driven amplification, and power management where exposed heatsink capability, pulsed ICM = 2 A, and fT = 100–180 MHz are critical design constraints.
Technical Context
The BCX55,115 operates as a general-purpose NPN bipolar junction transistor optimized for medium-power linear and switching applications. Its SOT89 package integrates an exposed collector die pad for direct thermal conduction to PCB copper, enabling Ptot up to 1.35 W under 6 cm² mounting conditions and Rth(j-sp) = 16 K/W.
It features three hFE variants (BCX55, BCX55-10, BCX55-16); the BCX55,115 corresponds to the standard-gain version (hFE = 63–250), with VBE ≤ 1 V and VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA, supporting efficient base drive in driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum safe collector-emitter voltage with open base; defines upper rail limit in linear regulators and switch-mode drivers. |
| IC | 1 A - Continuous DC collector current rating; supports sustained load switching in power management circuits. |
| hFE | 63–250 - DC current gain range at VCE = 2 V, IC = 150 mA; enables predictable base current sizing for gain-stable amplification. |
| fT | 100–180 MHz - Transition frequency at VCE = 5 V, IC = 50 mA; confirms suitability for high-speed switching up to ~50 MHz practical operation. |
| Ptot | 1.35 W - Max power dissipation with 6 cm² collector pad; enables thermally robust operation in compact SMT designs without heatsinks. |
| Rth(j-sp) | 16 K/W - Junction-to-solder-point thermal resistance; ensures rapid heat transfer from die to PCB, critical for reliability in sustained conduction. |
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 (L × W × H), compliant with JEITA SC-62 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current exit path; connected to ground or low-side reference in common-emitter configurations. |
| 2 | Collector | Main current input; electrically and thermally tied to exposed pad for power handling and PCB heat sinking. |
| 3 | Base | Control terminal; requires ~50 mA drive for full saturation at 500 mA collector load. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Enables direct thermal coupling to PCB copper, reducing Rth(j-a) to 93 K/W with 6 cm² pad - critical for ambient-limited industrial designs. |
| Three hFE options | Standard (63–250), medium (63–160), and high-gain (100–250) variants allow precise base drive optimization across load and temperature ranges. |
| High peak current | ICM = 2 A (1 ms pulse) supports surge handling in motor drivers and transient-loaded battery systems without secondary protection. |
| Low VCE(sat) | ≤ 0.5 V at IC/IB = 10 ensures <100 mW conduction loss at 500 mA - improves efficiency in low-voltage, high-current switches. |
Applications
| Linear Voltage Regulators | Power Management |
|---|---|
|
Use Scenario: Pass transistor in adjustable LDOs delivering 1–5 A output with dropout < 2 V. IC Role / Device Role / Timing Role: NPN series pass element controlling output via base bias from error amplifier. Use Value: High hFE minimizes base drive current; exposed pad sustains 1.35 W dissipation during worst-case dropout conditions. |
Use Scenario: Load switch or current limiter in multi-rail embedded power domains. IC Role / Device Role / Timing Role: Medium-power discrete switch enabling controlled power-up sequencing and fault isolation. Use Value: VCEO = 60 V accommodates 24 V/48 V industrial rails; ICM = 2 A handles inrush without latch-up. |
| Low-Side Switches | MOSFET Drivers |
|
Use Scenario: Ground-referenced actuator control in automotive body electronics and industrial PLC outputs. IC Role / Device Role / Timing Role: NPN switch sinking load current to GND with TTL/CMOS-compatible base drive. Use Value: VBE ≤ 1 V ensures reliable turn-on from 3.3 V logic; SOT89 footprint simplifies layout in space-constrained modules. |
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 controller IC and MOSFET gate capacitance. Use Value: fT ≥ 100 MHz supports fast gate charging; low VCE(sat) reduces Miller-effect delay and switching losses. |
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 |
|---|---|---|---|
| BCP55,115 | Same SOT89 package, identical VCEO/IC, but hFE = 63–250 at IC = 500 mA (not 150 mA); slightly higher Cc = 7 pF. | Preferred in higher-current switching (>300 mA avg) due to gain characterization at heavier loads. | Select BCP55,115 when operating near 500 mA continuous and needing gain stability at elevated IC. |
| ZTX653 | TO-92 package, VCEO = 60 V, IC = 1 A, hFE = 100–300, but Ptot = 1 W (no exposed pad); Rth(j-a) ≈ 200 K/W. | Used in through-hole prototyping or legacy designs where SMT thermal performance is not required. | Choose ZTX653 only for manual assembly or low-power (<0.5 W) applications where PCB real estate allows TO-92 footprint. |
Compared with BCP55,115 and ZTX653, BCX55,115 offers superior thermal performance in SMT form factor due to its exposed collector pad and lower Rth(j-sp), making it optimal for production-grade power stages where board-level heat spreading is essential.
Availability
BCX55,115 is available at Aetrix Electronics and suitable for linear voltage regulators, low-side switches, MOSFET drivers, and battery-driven devices requiring stable component supply, consistent parametric binning, and long-term industrial lifecycle support.
Supply support for BCX55,115 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BCX55 series belongs to Nexperia's medium-power bipolar transistor product line, engineered for robust performance in power conversion, regulation, and interface applications where thermal efficiency and gain consistency are critical.
FAQ
What is the maximum continuous collector current for BCX55,115?
The BCX55,115 is rated for 1 A continuous collector current (IC) under recommended operating conditions. This rating assumes proper PCB thermal management - specifically, a 6 cm² copper pad on FR4 - to maintain junction temperature below 150 °C. Derating applies above Tamb = 25 °C per Figure 1.
Does BCX55,115 have a built-in ESD protection diode?
No, the BCX55,115 does not integrate ESD protection diodes. It is a bare NPN transistor with standard junction isolation. System-level ESD protection must be implemented externally using TVS diodes or RC networks on base and collector lines, especially in handheld or industrial I/O interfaces.
Can BCX55,115 replace BCX55-16 in a circuit?
BCX55,115 and BCX55-16 share identical absolute maximum ratings and package, but differ in DC current gain: BCX55,115 has hFE = 63–250 at IC = 150 mA, while BCX55-16 is binned for hFE = 100–250. Substitution is acceptable only if the circuit tolerates lower minimum gain (63 vs. 100) and base drive is verified at worst-case hFE.
What is the thermal resistance from junction to solder point (Rth(j-sp)) for BCX55,115?
The BCX55,115 has Rth(j-sp) = 16 K/W when mounted on an FR4 PCB with tin-plated single-sided copper and a 6 cm² collector pad. This value reflects direct thermal conduction from die to solder joint and is critical for estimating junction temperature rise in high-duty-cycle applications.
BCX55,115 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:
- 63 @ 150mA, 2V
- Power - Max:
- 1.35 W
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX55,115 FAQ
1.How can I place an order for BCX55,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX55,115 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 BCX55,115 reliable?
The price and inventory of BCX55,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX55,115 is usually 5 days.
3.What payment methods are accepted for BCX55,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX55,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX55,115?
BCX55,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX55,115 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 BCX55,115?
For technical support, including BCX55,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX55,115 requirements.
6.How does Aetrix verify that BCX55,115 is sourced from the original manufacturer or authorized distributors?
All BCX55,115 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 BCX55,115 meets industry standards.
7.What is the process for return or replacement of BCX55,115?
All BCX55,115 units undergo pre-shipment inspection (PSI). If there is an issue with BCX55,115, 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 BCX55,115 part is unused and in its original packaging.
Return procedure for BCX55,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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