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

onsemi CPH3105-TL-E

Name: CPH3105-TL-E
Brand: onsemi
SKU: CPH3105-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CPH3105-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: CPH3105-TL-E.pdf

Description:: TRANS PNP 50V 3A 3-CPH

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CPH3105-TL-E from onsemi is a PNP bipolar junction transistor rated for –50 V V_CEO, –3 A I_C, and 0.9 W power dissipation in a CPH3 (SC-59/SOT-23) package. It delivers low V_CE(sat) of –140 mV at –2 A/–100 mA, high-speed switching (t_on = 35 ns), and f_T = 380 MHz - used in relay drivers and DC-DC converter switch stages.

For engineers reviewing the CPH3105-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, confirmed SC-59 mechanical compatibility, validated V_CE(sat) performance under pulsed –2 A load, and documented thermal derating on ceramic substrate.

Technical Context

This device uses onsemi's FBIT/MBIT process to achieve low saturation voltage and high current gain (h_FE = 200–560 at –2 V V_CE, –100 mA I_C). Its PNP configuration supports high-side switching in discrete power control circuits with fast turn-on/turn-off timing.

The CPH3105-TL-E operates within a –55°C to +150°C storage range and 150°C max junction temperature. Electrical behavior is characterized at T_a = 25°C with specified test conditions including V_CC = –25 V, pulse width = 20 μs, and DC ≤ 1% duty cycle.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–50 V - maximum collector-emitter blocking voltage in open-base configuration
I_C	–3 A - continuous DC collector current rating at T_a = 25°C
V_CE(sat) @ –2 A	–140 mV max - enables <150 mW conduction loss per switch event at rated current
f_T	380 MHz typ - supports high-frequency switching up to ~300 MHz practical operation
h_FE	200–560 - provides stable current amplification across –100 mA to –1 A operating range
t_on/t_f	35 ns / 22 ns - ensures sub-100 ns total switching transition for efficient PWM control
P_C	0.9 W - power dissipation limit when mounted on 600 mm² × 0.8 mm ceramic substrate

Pinout & Package

Package: CPH3 (JEITA SC-59 / JEDEC TO-236 / industry-standard SOT-23 footprint). Mounting height is 0.9 mm, enabling ultra-thin board designs.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring –100 mA base drive for full –2 A collector conduction
2	Emitter	Common reference terminal; connected to higher potential in PNP high-side switch
3	Collector	Switched output node; sinks load current to ground or lower-potential rail

Key Features

Feature	Design Value
Low V_CE(sat)	–140 mV max at –2 A/–100 mA enables >98% efficiency in low-voltage switching applications
High-speed switching	35 ns turn-on and 22 ns fall time support >5 MHz PWM without significant dead-time penalty
Ultrasmall CPH3 package	0.9 mm profile and SOT-23 compatibility allow placement in space-constrained DC-DC modules
High power dissipation density	0.9 W rating on ceramic substrate permits sustained operation at >1.5 W/cm² thermal flux

Applications

Relay Drivers	DC-DC Converter Switches
Use Scenario: Driving electromagnetic relays requiring 100–300 mA coil current in industrial PLC I/O modules. IC Role / Device Role / Timing Role: PNP switch providing high-side coil energization with fast de-energization via active pull-down. Use Value: Low V_CE(sat) reduces heat generation during continuous hold; high h_FE minimizes base drive circuit complexity.	Use Scenario: Synchronous rectifier or main switch in non-isolated buck converters delivering 1–3 A at 3.3–12 V output. IC Role / Device Role / Timing Role: Discrete PNP power switch controlling energy transfer from input to output inductor. Use Value: 380 MHz f_T and sub-100 ns switching enable stable operation at 500 kHz–1 MHz switching frequencies.
Lamp Drivers	Motor Drivers
Use Scenario: Controlling incandescent or halogen indicator lamps (5–24 V, 0.2–1 A) in automotive dashboards. IC Role / Device Role / Timing Role: High-side current sink managing lamp current with minimal voltage drop across the transistor. Use Value: –140 mV V_CE(sat) preserves >95% of supply voltage across lamp terminals at full brightness.	Use Scenario: H-bridge half-bridge leg in brushed DC motor drivers for small appliances or robotics (≤12 V, ≤2 A). IC Role / Device Role / Timing Role: PNP complement to NPN devices in totem-pole output stage for bidirectional motor control. Use Value: Matched thermal characteristics with CPH3205 enable balanced current sharing and reduced cross-conduction risk.

Relay Drivers

DC-DC Converter Switches

Use Scenario: Driving electromagnetic relays requiring 100–300 mA coil current in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: PNP switch providing high-side coil energization with fast de-energization via active pull-down.

Use Value: Low V_CE(sat) reduces heat generation during continuous hold; high h_FE minimizes base drive circuit complexity.

Use Scenario: Synchronous rectifier or main switch in non-isolated buck converters delivering 1–3 A at 3.3–12 V output.

IC Role / Device Role / Timing Role: Discrete PNP power switch controlling energy transfer from input to output inductor.

Use Value: 380 MHz f_T and sub-100 ns switching enable stable operation at 500 kHz–1 MHz switching frequencies.

Lamp Drivers

Motor Drivers

Use Scenario: Controlling incandescent or halogen indicator lamps (5–24 V, 0.2–1 A) in automotive dashboards.

IC Role / Device Role / Timing Role: High-side current sink managing lamp current with minimal voltage drop across the transistor.

Use Value: –140 mV V_CE(sat) preserves >95% of supply voltage across lamp terminals at full brightness.

Use Scenario: H-bridge half-bridge leg in brushed DC motor drivers for small appliances or robotics (≤12 V, ≤2 A).

IC Role / Device Role / Timing Role: PNP complement to NPN devices in totem-pole output stage for bidirectional motor control.

Use Value: Matched thermal characteristics with CPH3205 enable balanced current sharing and reduced cross-conduction risk.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP bipolar transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CPH3205-TL-E	NPN counterpart in identical CPH3 package; V_CEO = 50 V, I_C = 3 A, V_CE(sat) = 140 mV @ 2 A/100 mA	Used in low-side switching configurations where emitter is grounded; not interchangeable in high-side roles	Select CPH3205-TL-E only when circuit topology requires NPN polarity and complementary drive capability
MMBT3906LT1G	SOT-23 PNP with V_CEO = –40 V, I_C = –200 mA, V_CE(sat) = –400 mV @ –50 mA - lower current, higher saturation voltage	Suitable for signal-level switching only; cannot replace CPH3105-TL-E in ≥1 A load applications	Use MMBT3906LT1G only for logic-level interface or biasing; not for power switching

Compared with CPH3205-TL-E and MMBT3906LT1G, the CPH3105-TL-E uniquely combines PNP polarity, –3 A current handling, and –140 mV V_CE(sat) in an ultrathin SOT-23 package - making it irreplaceable in high-efficiency, high-side, medium-current switching where thermal and space constraints are critical.

Availability

CPH3105-TL-E is available at Aetrix Electronics and suitable for relay drivers, DC-DC converter switches, and lamp drivers requiring stable component supply, Pb-free compliance, and tape-and-reel delivery at 3,000 pcs./reel.

Supply support for CPH3105-TL-E 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The CPH3105-TL-E belongs to onsemi's CPH3-series high-current bipolar transistors, designed specifically for compact, high-efficiency discrete switching in space- and thermally constrained power conversion and electromechanical control systems.

FAQ

What is the maximum continuous collector current rating for the CPH3105-TL-E?

The CPH3105-TL-E has a maximum continuous collector current (I_C) rating of –3 A at T_a = 25°C when mounted on a ceramic substrate (600 mm² × 0.8 mm). Derating applies above 25°C ambient, with zero dissipation at 150°C junction temperature. This rating is confirmed in the Absolute Maximum Ratings table of the official CPH3105/CPH3205 datasheet (No. 6084-1/7).

Is the CPH3105-TL-E pin-compatible with standard SOT-23 footprints?

Yes, the CPH3105-TL-E uses the CPH3 package, which is mechanically identical to JEDEC TO-236 and industry-standard SOT-23. Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector - matching common SOT-23 layout conventions. Land pattern recommendations are provided in the datasheet outline drawing (No. 6084-6/7).

What is the typical gain-bandwidth product (f_T) of the CPH3105-TL-E?

The CPH3105-TL-E has a typical gain-bandwidth product (f_T) of 380 MHz at V_CE = –10 V and I_C = –500 mA. This value is measured and published in the Electrical Characteristics table (No. 6084-2/7) and supports high-frequency switching applications up to ~300 MHz under appropriate bias and layout conditions.

Does the CPH3105-TL-E meet lead-free (Pb-free) requirements?

Yes, the CPH3105-TL-E is Pb-free and RoHS-compliant, as explicitly stated in the Ordering Information section: "CPH3105-TL-E - Pb Free". The "-E" suffix denotes lead-free termination, and the device complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount assembly.

What is the collector-to-emitter saturation voltage (V_CE(sat)) at –2 A collector current for the CPH3105-TL-E?

The CPH3105-TL-E exhibits a maximum V_CE(sat) of –210 mV at I_C = –2 A and I_B = –100 mA, with a typical value of –140 mV under the same conditions. This parameter is specified in the Electrical Characteristics table (No. 6084-2/7) and directly impacts conduction losses in high-current switching applications.

CPH3105-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 100mA, 2A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 2V

Power - Max:: 900 mW

Frequency - Transition:: 380MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-CPH

CPH3105-TL-E FAQ

1.How can I place an order for CPH3105-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for CPH3105-TL-E 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 CPH3105-TL-E reliable?

The price and inventory of CPH3105-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CPH3105-TL-E is usually 5 days.

3.What payment methods are accepted for CPH3105-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CPH3105-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CPH3105-TL-E?

CPH3105-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CPH3105-TL-E 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 CPH3105-TL-E?

For technical support, including CPH3105-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CPH3105-TL-E requirements.

6.How does Aetrix verify that CPH3105-TL-E is sourced from the original manufacturer or authorized distributors?

All CPH3105-TL-E 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 CPH3105-TL-E meets industry standards.

7.What is the process for return or replacement of CPH3105-TL-E?

All CPH3105-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with CPH3105-TL-E, 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 CPH3105-TL-E part is unused and in its original packaging.

Return procedure for CPH3105-TL-E:

1.Submit a request within 90 days.

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

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