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

Nexperia USA Inc. BCX70H,235

Name: BCX70H,235
Brand: Nexperia USA Inc.
SKU: BCX70H,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX70H,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BCX70H,235.pdf

Description:: TRANS NPN 45V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCX70H,235 from Nexperia is an NPN general-purpose bipolar junction transistor in SOT23 package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 180–310 at I_C = 2 mA, used in low-power switching and small-signal amplification circuits in consumer and industrial electronics.

For engineers reviewing the BCX70H,235 datasheet, BCX70H,235 pinout, BCX70H,235 application, or BCX70H,235 equivalent, key selection criteria include verified h_FE range at multiple bias points, V_CE(sat) under defined drive conditions, thermal resistance (500 K/W), and SOT23 footprint compatibility with automated assembly.

Technical Context

This transistor operates as a low-voltage, low-current NPN switch or amplifier with base-emitter forward voltage (V_BE) of 550–750 mV at I_C = 2 mA and V_CE = 5 V, and transition frequency (f_T) of 100–250 MHz, enabling use in audio preamps and digital logic interfacing up to ~10 MHz.

Its thermal design is constrained by R_th(j-a) = 500 K/W on FR4 PCB, limiting continuous power dissipation to 250 mW at T_amb ≤ 25 °C; collector capacitance (C_c) is 1.7 pF at V_CB = 10 V, supporting stable high-frequency operation with minimal Miller effect.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - maximum safe collector-emitter voltage with base open; defines upper rail limit in switching applications
I_C (DC)	100 mA - continuous collector current rating; sets max load drive capability in linear or saturated operation
h_FE	180–310 at I_C = 2 mA - usable DC current gain range for predictable base drive sizing in amplification
V_CE(sat)	50–350 mV at I_C = 10 mA / I_B = 0.25 mA - low saturation voltage enables efficient switching with minimal conduction loss
f_T	100–250 MHz - usable unity-gain bandwidth for RF-coupled audio stages or fast digital signal conditioning
R_th(j-a)	500 K/W - thermal resistance from junction to ambient on FR4; determines required derating above 25 °C ambient
C_c	1.7 pF at V_CB = 10 V - collector-base capacitance affecting high-frequency stability and switching speed

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB), 3-pin, 1.3 mm × 2.9 mm footprint, 0.95 mm pitch, 1.1 mm height; optimized for reflow soldering and high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires 0.25 mA base drive for 10 mA collector saturation
2	Emitter	Common reference terminal; connected to ground or low-side return path in common-emitter configuration
3	Collector	Output current sink; handles up to 100 mA DC load with <350 mV drop when fully saturated

Key Features

Feature	Design Value
Low-voltage operation	Rated for 45 V V_CEO - suitable for 3.3 V, 5 V, and 12 V logic-level and sensor interface circuits
Controlled h_FE binning	BCX70H grade guarantees 180–310 h_FE at I_C = 2 mA - enables consistent base resistor selection across production lots
Low V_CE(sat)	≤350 mV at I_C = 10 mA - reduces power loss and self-heating in battery-powered switching nodes
High f_T	Min. 100 MHz - supports clean amplification of audio-band and low-MHz digital signals without phase distortion
Small-outline packaging	SOT23 footprint - compatible with standard pick-and-place equipment and allows >200 units/in² board density

Applications

LED Driver Circuit

Microcontroller GPIO Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs.

IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground.

Use Value: V_CE(sat) ≤350 mV ensures >3.0 V forward voltage remains across LED, maintaining brightness consistency.

Use Scenario: Level-shifting and current boosting between 1.8 V/3.3 V MCU pins and 5 V peripherals.

IC Role / Device Role / Timing Role: Digital buffer amplifier with fixed gain and low propagation delay.

Use Value: h_FE ≥180 enables reliable turn-on with <10 µA base current, reducing MCU pin loading.

Audio Pre-amplifier Stage

Power Supply Enable Switch

Use Scenario: Low-noise voltage amplification of electret microphone output (200 mVpp, 1 kHz).

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased at I_C = 2 mA.

Use Value: f_T ≥100 MHz and F = 2–6 dB ensure flat 20 Hz–20 kHz response with minimal added noise.

Use Scenario: Enabling/disabling 5 V auxiliary rail in embedded system via MCU control.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling PMOS gate or LDO enable pin.

Use Value: 100 mA I_C rating and 45 V V_CEO support robust control of 5–12 V rails with margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BH,215	Same SOT23 package; h_FE = 200–450 at I_C = 2 mA; V_CEO = 45 V; slightly higher f_T (300 MHz)	Higher gain spread may require tighter base resistor tolerance in precision current mirrors	Preferred where higher f_T or wider h_FE margin is needed without changing layout
MMBT3904LT1G	Same pinout; h_FE = 100–300 at I_C = 10 mA; V_CEO = 40 V; R_th(j-a) = 400 K/W	Lower V_CEO limits use in 12 V systems with transients; better thermal performance on FR4	Choose when operating near 40 V or requiring improved thermal margin at same I_C

Compared with BCX70H,235, BC847BH,215 offers higher f_T and broader h_FE for RF-sensitive designs, while MMBT3904LT1G trades 5 V lower V_CEO for better thermal resistance-both retain SOT23 compatibility but differ in gain consistency and voltage headroom.

Availability

BCX70H,235 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, audio pre-amplifier stages, and power supply enable switches requiring stable component supply and SOT23 footprint consistency.

Supply support for BCX70H,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

Nexperia is a global leader in discrete semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-volume, high-reliability components for automotive, industrial, and consumer markets.

The BCX70 series belongs to Nexperia's general-purpose transistor product line, designed specifically for cost-sensitive, space-constrained applications requiring predictable DC gain, low saturation voltage, and robust SMT manufacturability.

FAQ

Is BCX70H,235 RoHS compliant and lead-free?

Yes, BCX70H,235 is RoHS compliant and lead-free per Nexperia's standard manufacturing process. The SOT23 package uses lead-free matte tin plating on terminals, and all materials meet EU Directive 2011/65/EU requirements with full declaration available in the official Nexperia compliance database.

What is the maximum allowable base current for BCX70H,235?

The peak base current (I_BM) is specified as 200 mA in the Absolute Maximum Ratings table. However, for reliable DC operation, base current should be limited to ≤5 mA to avoid localized heating and maintain h_FE stability, especially at elevated ambient temperatures.

Can BCX70H,235 replace BCX70G in existing designs?

No-BCX70H and BCX70G have different h_FE bins: BCX70G specifies h_FE = 120–220 at I_C = 2 mA, while BCX70H is 180–310. Substituting without verifying base resistor values may cause overdrive or insufficient saturation in switching applications.

Does BCX70H,235 support pulsed operation beyond its DC ratings?

Yes-peak collector current (I_CM) is rated at 200 mA for pulse widths ≤300 μs and duty cycle ≤2%. This allows short-duration surge handling in motor commutation or relay driving, provided average power remains within 250 mW and thermal mass prevents junction overheating.

BCX70H,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:: NPN

Current - Collector (Ic) (Max):: 100 mA

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

Vce Saturation (Max) @ Ib, Ic:: 550mV @ 1.25mA, 50mA

Current - Collector Cutoff (Max):: 20nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 180 @ 2mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BCX70H,235 FAQ

1.How can I place an order for BCX70H,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX70H,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 BCX70H,235 reliable?

The price and inventory of BCX70H,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX70H,235 is usually 5 days.

3.What payment methods are accepted for BCX70H,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX70H,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX70H,235?

BCX70H,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX70H,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 BCX70H,235?

For technical support, including BCX70H,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX70H,235 requirements.

6.How does Aetrix verify that BCX70H,235 is sourced from the original manufacturer or authorized distributors?

All BCX70H,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 BCX70H,235 meets industry standards.

7.What is the process for return or replacement of BCX70H,235?

All BCX70H,235 units undergo pre-shipment inspection (PSI). If there is an issue with BCX70H,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 BCX70H,235 part is unused and in its original packaging.

Return procedure for BCX70H,235:

1.Submit a request within 90 days.

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

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