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Nexperia USA Inc. BCX54-16,135
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- Part No.:
- BCX54-16,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX54-16,135.pdf
- Description:
- TRANS NPN 45V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:5,411
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Product details
Overview
BCX54-16,135 from Nexperia is an NPN medium power transistor in SOT89 (SC-62) package, rated for 45 V VCEO, 1 A continuous collector current, and 250 hFE at IC = 150 mA / VCE = 2 V. It serves as a low-side switch or MOSFET driver in battery-powered power management circuits with thermal performance enhanced by an exposed die pad.
For engineers reviewing the BCX54-16,135 datasheet, BCX54-16,135 pinout, BCX54-16,135 application, or BCX54-16,135 equivalent, key selection criteria include DC current gain binning (100–250), junction-to-ambient thermal resistance (93 K/W with 6 cm² copper pad), and safe operating area under pulsed conditions (ICM = 2 A, tp ≤ 1 ms).
Technical Context
This transistor uses epitaxial planar silicon technology with a monolithic structure optimized for medium-power linear and switching operation. Its base-emitter junction is designed for stable hFE across -55 °C to 150 °C ambient, and its collector-base breakdown voltage (V(BR)CBO) matches V(BR)CEO at 45 V, indicating symmetrical junction design.
The device's fT of 100–180 MHz enables use in high-speed switching up to ~10 MHz with adequate gain margin, while its VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA supports efficient low-voltage saturation in load-switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch designs. |
| IC | 1 A - Continuous DC collector current rating; sets maximum steady-state load drive capability. |
| hFE | 100–250 at VCE = 2 V, IC = 150 mA - Confirmed DC current gain bin for BCX54-16; ensures predictable base drive sizing. |
| Ptot | 1.35 W - Total power dissipation with 6 cm² copper pad; determines thermal layout requirements on PCB. |
| Rth(j-a) | 93 K/W - Junction-to-ambient thermal resistance with optimized 6 cm² collector pad; enables 1.35 W dissipation at Tamb = 25 °C. |
| fT | 100–180 MHz - Transition frequency at VCE = 5 V, IC = 50 mA; supports fast switching with gain retention. |
| VCE(sat) | ≤ 0.5 V at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss in switching applications. |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed die pad for enhanced thermal transfer; 3-pin flat-lead configuration measuring 4.6 mm × 2.6 mm × 1.8 mm (L × W × H), compliant with JEDEC MO-229 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current return path; connected to ground or low-side reference in switch configurations. |
| 2 | Collector (C) | Main current output terminal; soldered to large copper area for thermal management and current routing. |
| 3 | Base (B) | Control input; requires current-limited drive (max IB = 0.3 A) to avoid overdrive or thermal runaway. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE bins | BCX54-16 offers 100–250 hFE, enabling precise base resistor selection without gain variation testing. |
| Exposed collector pad | Integral thermal path from die to PCB; reduces Rth(j-a) by up to 40% vs. standard footprint (93 K/W vs. 250 K/W). |
| High peak current | 2 A ICM (tp ≤ 1 ms) supports surge loads like motor startup or capacitor charging without secondary protection. |
| Wide temperature range | Specified operation from -55 °C to 150 °C junction temperature; suitable for industrial and extended-ambient environments. |
| Low VBE | ≤ 1 V at IC = 500 mA ensures compatibility with 3.3 V and 5 V logic-level drivers without level-shifting. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
Use Scenario: Pass transistor in adjustable LDOs delivering up to 1 A output current with dropout < 1.5 V. IC Role / Device Role / Timing Role: NPN series pass element controlled by error amplifier feedback loop. Use Value: VCE(sat) ≤ 0.5 V and hFE ≥ 100 ensure stable regulation with minimal base drive overhead and thermal headroom. |
Use Scenario: Gate driver stage for N-channel power MOSFETs in DC-DC converters or motor H-bridges. IC Role / Device Role / Timing Role: Medium-current buffer amplifying microcontroller GPIO to deliver >50 mA peak gate charge current. Use Value: fT ≥ 100 MHz and ICM = 2 A enable sub-100 ns turn-on transitions for MOSFETs up to 10 nF gate capacitance. |
| Low-Side Switches | Battery-Driven Devices |
Use Scenario: Load switch controlling solenoids, relays, or LED strings in 12 V automotive or industrial control modules. IC Role / Device Role / Timing Role: High-current saturated switch placed between load and ground. Use Value: 45 V VCEO withstands load-dump transients; 1.35 W Ptot allows 1 A continuous conduction with minimal heatsinking. |
Use Scenario: Power-path control in portable medical monitors, handheld test equipment, or IoT sensors powered by Li-ion or alkaline cells. IC Role / Device Role / Timing Role: Enable/disable function for subsystems to extend battery life via deep-sleep sequencing. Use Value: Low ICBO ≤ 100 nA and hFE stability over temperature minimize quiescent current drift and ensure reliable wake-up behavior. |
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 |
|---|---|---|---|
| BCP54,115 | Same SOT89 package, but hFE bin 63–160; lower gain consistency at IC = 150 mA. | Less suitable for precision current mirror or low-base-drive designs requiring hFE ≥ 100. | Select when cost sensitivity outweighs gain stability needs and base drive margin is ample. |
| ZTX653STZ | TO-92 package, higher VCEO = 60 V, but Ptot = 1 W and Rth(j-a) = 150 K/W - no exposed pad. | Not drop-in replaceable due to through-hole mounting and inferior thermal performance. | Choose only if board redesign permits TO-92 and system tolerates higher junction temperature rise. |
Compared with BCX54-16,135, BCP54,115 trades gain consistency for cost, while ZTX653STZ sacrifices thermal efficiency and SMT compatibility for higher voltage headroom - neither matches the combination of 100–250 hFE, 1.35 W dissipation, and SOT89 thermal pad in a single package.
Availability
BCX54-16,135 is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply, consistent hFE binning, and proven thermal performance in SMT power applications.
Supply support for BCX54-16,135 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 essential semiconductors - including discrete devices, logic ICs, and MOSFETs - serving automotive, industrial, mobile, and computing markets.
The BCX54 series belongs to Nexperia's medium-power bipolar transistor product line, engineered for robustness in power management and interface functions where gain stability, thermal efficiency, and SMT manufacturability are critical.
FAQ
What is the maximum allowable base current for continuous operation?
The absolute maximum DC base current (IB) is 0.3 A per datasheet limiting values. For reliable continuous operation, design base drive to stay below 0.25 A with derating above 25 °C ambient, ensuring junction temperature remains ≤150 °C given the device's thermal resistance and power dissipation profile.
Can BCX54-16,135 be used in avalanche mode?
No - BCX54-16,135 is not rated or characterized for avalanche operation. Its V(BR)CEO = 45 V is a DC breakdown limit under specified test conditions; operation beyond this voltage risks irreversible device failure. Use external clamping or snubbers for inductive load flyback protection.
How does the exposed collector pad affect PCB layout?
The exposed pad must be soldered to a minimum 6 cm² copper area on the top layer, thermally connected to internal ground or power planes via ≥4 thermal vias (0.3 mm diameter). This achieves the 93 K/W Rth(j-a); smaller pads increase thermal resistance nonlinearly and risk exceeding Tj limits under full load.
Is BCX54-16,135 qualified for automotive applications?
No - the BCX54 series is explicitly marked as non-automotive qualified in the revision history (v.10, April 2023). It lacks AEC-Q101 qualification, automotive-grade screening, and guaranteed operation over -40 °C to +125 °C case temperature. For automotive use, select Nexperia's BCX54-Q series variants instead.
BCX54-16,135 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):
- 45 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
BCX54-16,135 FAQ
1.How can I place an order for BCX54-16,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX54-16,135 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 BCX54-16,135 reliable?
The price and inventory of BCX54-16,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX54-16,135 is usually 5 days.
3.What payment methods are accepted for BCX54-16,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX54-16,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX54-16,135?
BCX54-16,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX54-16,135 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 BCX54-16,135?
For technical support, including BCX54-16,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX54-16,135 requirements.
6.How does Aetrix verify that BCX54-16,135 is sourced from the original manufacturer or authorized distributors?
All BCX54-16,135 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 BCX54-16,135 meets industry standards.
7.What is the process for return or replacement of BCX54-16,135?
All BCX54-16,135 units undergo pre-shipment inspection (PSI). If there is an issue with BCX54-16,135, 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 BCX54-16,135 part is unused and in its original packaging.
Return procedure for BCX54-16,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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