My Inquiry
My Account
Nexperia USA Inc. BCX55-16-QX
- Part No.:
- BCX55-16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX55-16-QX.pdf
- Description:
- TRANS NPN 60V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:5,261
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BCX55-16-QX from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT89 (SC-62) package, rated for 60 V VCEO, 1 A continuous collector current, and 100–250 hFE at VCE = 2 V / IC = 150 mA. It serves as a low-side switch or MOSFET driver in automotive power management systems with exposed die pad for thermal dissipation.
For engineers reviewing the BCX55-16-QX datasheet, BCX55-16-QX pinout, BCX55-16-QX application, or BCX55-16-QX equivalent, this page delivers verified electrical parameters, thermal derating behavior, automotive qualification status, and real-world use context for linear regulators, battery-driven devices, and amplifier stages.
Technical Context
This transistor operates as a single NPN bipolar junction device optimized for medium-power switching and amplification. Its design supports pulsed IC up to 2 A (tp ≤ 1 ms), VBE ≤ 1 V at IC = 500 mA, and fT = 100–180 MHz - enabling stable gain in audio and DC-DC control loops.
Thermal performance is defined by Rth(j-sp) = 16 K/W to solder point and Ptot = 1.35 W with 6 cm² collector pad on FR4. Junction temperature is rated to 150 °C, and ambient operating range spans −55 °C to +150 °C per AEC-Q101 stress testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - maximum safe collector-emitter voltage under open-base condition; defines breakdown margin in 48 V automotive rail switching. |
| IC (continuous) | 1 A - steady-state current handling capacity; supports load switching in battery-powered motor drivers and LED arrays. |
| hFE | 100–250 at VCE = 2 V / IC = 150 mA - high and tightly binned DC current gain enables predictable base drive sizing in linear regulators. |
| VCE(sat) | ≤ 0.5 V at IC = 500 mA / IB = 50 mA - low saturation voltage reduces conduction loss in low-side switch configurations. |
| fT | 100–180 MHz - transition frequency confirms usable bandwidth for audio amplification and fast-switching feedback paths. |
| Rth(j-sp) | 16 K/W - thermal resistance to solder point enables direct PCB heat sinking without heatsink hardware in space-constrained modules. |
| AEC-Q101 qualified | Qualified for automotive applications - validated for temperature cycling, HTRB, and ESD per AEC standard; suitable for under-hood ECUs. |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed collector pad for enhanced thermal and electrical conductivity. Dimensions: 4.6 × 2.6 × 1.8 mm; 3-pin flat-lead configuration with standardized reflow footprint (Fig. 10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current return path; connected to ground or low-side reference; electrically isolated from package tab. |
| 2 | Collector (C) | Main current output node; tied to exposed die pad for thermal transfer and low-inductance high-current routing. |
| 3 | Base (B) | Control input; requires ~50 mA drive for full saturation at 500 mA load; sensitive to ESD due to thin oxide layer. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Enables direct thermal coupling to PCB copper; achieves 1.35 W total power dissipation with 6 cm² mounting area. |
| Three hFE bins (10–16–25) | BCX55-16-QX offers 100–250 hFE, allowing precise base resistor selection for consistent turn-on timing across production batches. |
| AEC-Q101 qualification | Validated for automotive under-hood environments including temperature cycling (−55 °C to +150 °C) and humidity exposure. |
| High VCEO / VCBO | 60 V rating supports operation in 42 V stop-start systems and industrial 48 V DC distribution without derating. |
| Low VCE(sat) | ≤ 0.5 V at IC/IB = 10 ensures <125 mW conduction loss at 250 mA load - critical for thermally constrained battery packs. |
Applications
| Linear Voltage Regulators | Power Management |
|---|---|
|
Use Scenario: Pass transistor in adjustable 3-terminal linear regulator supplying 12 V/500 mA to infotainment subsystems. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias network; operates in active region with thermal feedback. Use Value: High hFE bin minimizes base drive current; exposed pad maintains Tj < 125 °C at full load without external heatsink. |
Use Scenario: Load switch enabling/disabling 24 V auxiliary rail in commercial vehicle telematics module. IC Role / Device Role / Timing Role: Low-side switch controlled by microcontroller GPIO; handles inrush and steady-state current. Use Value: 2 A peak rating absorbs capacitor charging surges; AEC-Q101 qualification ensures reliability over 15-year vehicle lifecycle. |
| MOSFET Drivers | Battery-Driven Devices |
|
Use Scenario: Gate driver stage for N-channel power MOSFET in 48 V BLDC motor controller half-bridge. IC Role / Device Role / Timing Role: Current amplifier boosting MCU GPIO output to deliver ≥1 A gate charge pulse. Use Value: fT > 100 MHz supports clean 20 kHz PWM edge transitions; low VCE(sat) limits driver-stage losses. |
Use Scenario: Power enable switch in portable medical monitor powered by Li-ion battery pack (3.0–4.2 V). IC Role / Device Role / Timing Role: Reverse-polarity protection and soft-start control via emitter-follower configuration. Use Value: VEBO = 5 V withstands battery insertion transients; −55 °C minimum Tamb rating supports field deployment in cold climates. |
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-Q | hFE = 63–160 (lower gain bin); identical VCEO, IC, package, and AEC-Q101 status. | Suitable where lower base drive sensitivity is acceptable, e.g., fixed-resistor bias in cost-sensitive consumer power supplies. | Select when tighter hFE tolerance is unnecessary and BOM simplification is prioritized over gain headroom. |
| ZTX653 | TO-92 package; VCEO = 60 V, IC = 1 A, hFE = 100–300, but not AEC-Q101 qualified; higher Rth(j-a). | Limited to non-automotive industrial or prototyping use; lacks thermal pad and automotive validation. | Choose only for lab evaluation or non-automotive production where SMT assembly compatibility is secondary. |
Compared with BCX55-10-Q and ZTX653, BCX55-16-QX provides the highest guaranteed hFE bin and automotive qualification in a thermally optimized SOT89 package - making it the preferred choice for production-grade automotive power switches requiring robust base drive margin and thermal reliability.
Availability
BCX55-16-QX is available at Aetrix Electronics and suitable for automotive ECUs, industrial battery management systems, and medical portable devices requiring stable component supply with long-term lifecycle assurance.
Supply support for BCX55-16-QX 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, with leadership in automotive-qualified components and advanced packaging.
The BCX55-Q series belongs to Nexperia's AEC-Q101-qualified medium-power transistor family, engineered specifically for automotive power switching, linear regulation, and driver-stage amplification in harsh-environment applications.
FAQ
Is BCX55-16-QX pin-compatible with BCX55-10-Q and BCX55-Q?
Yes - all BCX55-Q series variants share identical SOT89 (SC-62) pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. The only differences are hFE binning and marking code (BM vs BG vs BE); no layout change is required when substituting within the same package.
What is the maximum allowable PCB copper area for optimal thermal performance?
Maximum thermal benefit is achieved with a 6 cm² collector pad on FR4 - delivering Ptot = 1.35 W and Rth(j-a) = 93 K/W. Using 1 cm² reduces Ptot to 0.95 W; standard footprint limits it to 0.50 W. Pad size must match the solder land dimensions in Figure 10.
Does BCX55-16-QX support pulsed operation beyond its DC ratings?
Yes - it supports ICM = 2 A for single pulses ≤ 1 ms and IC = 500 mA with IB = 50 mA for saturation. Transient thermal impedance curves (Figs. 2–4) confirm safe operation under short-duration loads typical in motor commutation and surge protection.
Can BCX55-16-QX be used in avalanche mode?
No - the device is not rated or characterized for repetitive avalanche operation. Its absolute maximum VCEO = 60 V applies only under open-base conditions; operation near breakdown without clamping risks permanent degradation. External snubbers or TVS diodes are required for inductive load switching.
BCX55-16-QX 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:
- 500 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX55-16-QX FAQ
1.How can I place an order for BCX55-16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX55-16-QX 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-QX reliable?
The price and inventory of BCX55-16-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BCX55-16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX55-16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX55-16-QX?
BCX55-16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX55-16-QX 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-QX?
For technical support, including BCX55-16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX55-16-QX requirements.
6.How does Aetrix verify that BCX55-16-QX is sourced from the original manufacturer or authorized distributors?
All BCX55-16-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BCX55-16-QX?
All BCX55-16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCX55-16-QX, 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-QX part is unused and in its original packaging.
Return procedure for BCX55-16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCX55-16-QX Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
