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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. BCX17,235

Name: BCX17,235
Brand: Nexperia USA Inc.
SKU: BCX17,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX17,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCX17,235.pdf

Description:: TRANS PNP 45V 0.5A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

BCX17,235 from NXP Semiconductors is a PNP general-purpose bipolar junction transistor in SOT23 package, rated for −45 V V_CEO, −500 mA I_C, and 250 mW P_tot, used in saturated switching and driver circuits for industrial control modules and thin-film power stages.

For engineers reviewing the BCX17,235 datasheet, BCX17,235 pinout, BCX17,235 application, or BCX17,235 equivalent, key selection criteria include verified PNP polarity, SOT23 footprint compatibility, −45 V collector-emitter breakdown, −500 mA DC current capability, and confirmed h_FE range of 100–600 at −100 mA.

Technical Context

This device operates as a medium-power PNP switch with fixed polarity and no integrated biasing or protection. Its DC current gain (h_FE) varies from 40 at −500 mA to 600 at −100 mA, and its V_CEsat is specified at −620 mV under −500 mA/−50 mA drive conditions.

Thermal resistance R_th(j-a) is 500 K/W on FR4 PCB, limiting continuous operation at full current without derating. Transition frequency f_T is 80 MHz at −10 mA/−5 V, confirming suitability for low-to-moderate speed switching-not RF amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V: Maximum safe collector-emitter voltage before breakdown in open-base configuration.
I_C (DC)	−500 mA: Continuous collector current rating defining maximum load drive capability.
P_tot	250 mW: Total power dissipation limit at T_amb ≤ 25 °C on FR4 board.
h_FE	100–600: DC current gain range at −100 mA, critical for base drive sizing in switching designs.
V_CEsat	−620 mV: Saturation voltage at −500 mA/−50 mA, directly impacting conduction loss in on-state.
f_T	80 MHz: Transition frequency indicating usable bandwidth for switching up to ~10 MHz.

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB), 3-lead, dimensions per JEDEC outline: 2.8 mm × 1.4 mm × 1.1 mm height, 0.95 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires external resistor-based biasing for saturation.
2	Emiter	PNP source terminal; connected to higher potential rail in typical high-side switch configuration.
3	Collector	Output terminal; sinks load current to ground or lower-potential node when active.

Key Features

Feature	Design Value
High DC current capability	Rated for −500 mA continuous collector current, enabling direct drive of relays and small solenoids.
Low saturation voltage	V_CEsat = −620 mV at −500 mA ensures <0.3 W conduction loss in typical on-state operation.
Wide h_FE range	100–600 gain spread allows robust design across manufacturing lots without recalculating base resistors.
SOT23 footprint	Standardized 3-pin SMT package enables automated assembly and compatibility with legacy BCX-series layouts.

Applications

Industrial Relay Drivers

Thin-Film Power Stages

Use Scenario: Driving 24 V DC industrial relays requiring 40–100 mA coil current in PLC output modules.

IC Role / Device Role / Timing Role: PNP switch configured in high-side topology to energize relay coils referenced to system ground.

Use Value: −45 V V_CEO margin accommodates 24 V supply transients; −620 mV V_CEsat minimizes heat generation during sustained activation.

Use Scenario: Load switching in compact thin-film hybrid circuits where space and thermal mass are constrained.

IC Role / Device Role / Timing Role: Discrete PNP switch replacing larger TO-92 devices to meet miniaturization targets.

Use Value: SOT23 footprint reduces PCB area by >70% vs. through-hole alternatives while maintaining −500 mA drive capacity.

LED Current Sinks

Level-Shifting Interfaces

Use Scenario: Constant-current sinking for high-brightness indicator LEDs in panel-mounted HMI units.

IC Role / Device Role / Timing Role: Linear-mode current sink with emitter resistor feedback, leveraging stable h_FE at −100 mA.

Use Value: 100–600 h_FE range allows precise current setting via single emitter resistor without trimming.

Use Scenario: Bidirectional logic-level translation between 3.3 V microcontroller GPIO and 5 V peripheral buses.

IC Role / Device Role / Timing Role: PNP-based open-collector interface with pull-up to higher rail, enabling voltage domain bridging.

Use Value: −5 V V_EBO rating supports safe reverse-bias operation during bus contention events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-40,215	Same SOT23 package; h_FE min 250 (vs. BCX17's 100); V_CEO = −45 V identical.	Better gain consistency for precision current sources; same switching use cases.	Select when tighter h_FE tolerance is required without changing layout.
MMBT3906LT1G	V_CEO = −40 V (5 V lower); P_tot = 310 mW; h_FE = 100–300 at −10 mA.	Lower voltage margin; higher power rating but narrower gain range.	Prefer for higher ambient temperature operation where derated power matters more than voltage headroom.

Compared with BCX17,235, BC807-40 offers superior h_FE consistency for analog biasing, while MMBT3906LT1G trades 5 V V_CEO margin for +60 mW power handling-making each optimal for distinct thermal or precision requirements.

Availability

BCX17,235 is available at Aetrix Electronics and suitable for industrial relay drivers, thin-film power stages, LED current sinks, and level-shifting interfaces requiring stable component supply across production lifecycles.

Supply support for BCX17,235 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BCX17,235 belongs to NXP's legacy discrete transistor product line, designed specifically for cost-sensitive, high-volume industrial switching and driver functions where reliability and SMT compatibility are prioritized over advanced features.

FAQ

Is BCX17,235 RoHS compliant?

Yes. BCX17,235 manufactured after 2006 conforms to EU RoHS Directive 2011/65/EU, with lead-free terminations and halogen-free molding compound. The original 2004 datasheet predates full RoHS enforcement, but current production batches meet all substance restrictions.

What is the maximum operating temperature for BCX17,235?

The maximum junction temperature (T_j) is 150 °C, and the storage temperature range is −65 °C to +150 °C. Ambient operation is rated from −65 °C to +150 °C, but practical continuous use above 100 °C requires derating based on R_th(j-a) = 500 K/W and actual PCB copper area.

Can BCX17,235 replace BCX18 in circuit designs?

No. BCX17 has V_CEO = −45 V and V_CBO = −50 V; BCX18 is rated only to −25 V V_CEO and −30 V V_CBO. Substituting BCX17 for BCX18 is electrically safe, but BCX18 cannot replace BCX17 in −45 V applications without risk of breakdown.

Does BCX17,235 have built-in ESD protection?

No. BCX17,235 is an unclamped bipolar transistor with no integrated ESD structures. Per the datasheet, it has standard human-body-model (HBM) sensitivity; handling requires standard ESD precautions, and external protection diodes are recommended in high-noise environments.

BCX17,235 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 620mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 80MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BCX17,235 FAQ

1.How can I place an order for BCX17,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX17,235 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 BCX17,235 reliable?

The price and inventory of BCX17,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX17,235 is usually 5 days.

3.What payment methods are accepted for BCX17,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX17,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX17,235?

BCX17,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX17,235 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 BCX17,235?

For technical support, including BCX17,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX17,235 requirements.

6.How does Aetrix verify that BCX17,235 is sourced from the original manufacturer or authorized distributors?

All BCX17,235 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 BCX17,235 meets industry standards.

7.What is the process for return or replacement of BCX17,235?

All BCX17,235 units undergo pre-shipment inspection (PSI). If there is an issue with BCX17,235, 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 BCX17,235 part is unused and in its original packaging.

Return procedure for BCX17,235:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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