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

onsemi CPH3205-TL-E

Name: CPH3205-TL-E
Brand: onsemi
SKU: CPH3205-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CPH3205-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: CPH3205-TL-E.pdf

Description:: TRANS NPN 50V 3A CPH3

Quantity:: RFQ Add To RFQ list

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Inventory:2,999

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Product details

Overview

CPH3205-TL-E from onsemi is a PNP bipolar junction transistor rated for –50 V V_CEO, –3 A I_C, with low V_CE(sat) of –140 mV (typ) at I_C = –2 A / I_B = –100 mA, high-speed switching (t_f = 22 ns typ), and housed in the ultrasmall CPH3 (SOT-23) package. It serves as a power switch in DC-DC converter output stages and motor driver H-bridge high-side legs.

For engineers reviewing the CPH3205-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, confirmed –50 V breakdown rating, measured V_CE(sat) performance under pulsed and DC conditions, thermal dissipation capability on ceramic substrate, and JEDEC SC-59 footprint compatibility.

Technical Context

The CPH3205-TL-E is a discrete PNP BJT fabricated using onsemi's MBIT process, optimized for low-saturation-voltage switching in medium-power analog and digital control circuits. Its design emphasizes fast turn-off (t_stg = 300 ns max) and stable h_FE (200–560 at V_CE = –2 V, I_C = –100 mA), enabling reliable operation in pulse-width-modulated loads.

It operates within a junction temperature range of –55 °C to +150 °C and delivers 0.9 W power dissipation when mounted on a 600 mm² × 0.8 mm ceramic substrate. The device exhibits f_T = 380 MHz (typ) at V_CE = –10 V, I_C = –500 mA, supporting high-frequency switching applications up to several hundred kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–50 V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in high-side PNP switch configurations.
I_C	–3 A - Continuous DC collector current rating; supports motor driver and relay load switching without forced cooling.
V_CE(sat)	–140 mV (typ) at I_C = –2 A / I_B = –100 mA - Low saturation voltage minimizes conduction loss and self-heating in power stage designs.
f_T	380 MHz (typ) at V_CE = –10 V, I_C = –500 mA - Enables stable gain in high-speed switching and RF bias applications up to ~100 MHz.
h_FE	200–560 at V_CE = –2 V, I_C = –100 mA - Wide DC current gain range allows flexible base drive design across varying load conditions.
C_ob	13 pF (typ) at V_CB = –10 V, f = 1 MHz - Low output capacitance reduces switching energy loss and improves rise/fall time consistency.
t_f	22 ns (typ) - Fast fall time enables efficient PWM operation above 100 kHz with minimal dead-time overhead.

Pinout & Package

CPH3205-TL-E is packaged in the CPH3 outline, identical to JEITA SC-59 and JEDEC TO-236/SOT-23 standards. Mounting height is only 0.9 mm, supporting ultra-thin PCB assemblies. The package uses Pb-free terminations and is supplied on 3,000-piece embossed tape reels (TL).

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to saturate.
2	Emitter	Common reference terminal for PNP configuration; connected to higher potential rail in high-side switch topologies.
3	Collector	Output terminal sourcing current to load; voltage swing limited to ≤ V_CEO (–50 V) with respect to emitter.

Key Features

Feature	Design Value
Low V_CE(sat)	–140 mV typical at –2 A ensures <100 mW conduction loss per device, reducing thermal stress in dense layouts.
Ultrasmall CPH3 package	0.9 mm profile and SOT-23 footprint enable space-constrained designs such as portable power modules and wearables.
High-speed switching	22 ns fall time and 300 ns storage time support clean edge transitions in 200 kHz+ SMPS feedback paths.
High power dissipation	0.9 W rating on ceramic substrate allows direct use in non-fan-cooled industrial controls without heatsinking.
MBIT process technology	Enables tight parameter distribution (h_FE spread 200–560) and robust ESD tolerance for assembly-line reliability.

Applications

DC-DC Converter Switch	Lamp Driver
Use Scenario: High-side PNP switch in non-synchronous buck converter output stage driving 12 V LED strings or solenoid loads. IC Role / Device Role / Timing Role: Power switching element controlling current flow from input rail to load; operates in saturated on/off mode at 50–200 kHz. Use Value: Low V_CE(sat) reduces conduction loss by >30% versus legacy PNP transistors, improving efficiency in battery-powered systems.	Use Scenario: Constant-current lamp driver for automotive interior lighting or industrial status indicators. IC Role / Device Role / Timing Role: Linear or PWM-controlled current source regulating incandescent/LED current via emitter-follower or common-emitter topology. Use Value: Stable h_FE over temperature ensures consistent brightness across –40 °C to +85 °C ambient ranges.
Motor Driver (H-Bridge)	Relay Driver
Use Scenario: Upper-leg switch in brushed DC motor H-bridge for robotics or actuator control. IC Role / Device Role / Timing Role: High-side PNP switch enabling bidirectional motor control with single-supply logic interface. Use Value: Fast t_f and low C_ob minimize shoot-through risk during direction reversal, increasing system robustness.	Use Scenario: Solid-state replacement for electromechanical relays in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: Interface transistor amplifying microcontroller GPIO signals to energize 24 V relay coils. Use Value: –3 A I_C rating supports direct drive of high-coil-inductance relays without external Darlington stages.

DC-DC Converter Switch

Lamp Driver

Use Scenario: High-side PNP switch in non-synchronous buck converter output stage driving 12 V LED strings or solenoid loads.

IC Role / Device Role / Timing Role: Power switching element controlling current flow from input rail to load; operates in saturated on/off mode at 50–200 kHz.

Use Value: Low V_CE(sat) reduces conduction loss by >30% versus legacy PNP transistors, improving efficiency in battery-powered systems.

Use Scenario: Constant-current lamp driver for automotive interior lighting or industrial status indicators.

IC Role / Device Role / Timing Role: Linear or PWM-controlled current source regulating incandescent/LED current via emitter-follower or common-emitter topology.

Use Value: Stable h_FE over temperature ensures consistent brightness across –40 °C to +85 °C ambient ranges.

Motor Driver (H-Bridge)

Relay Driver

Use Scenario: Upper-leg switch in brushed DC motor H-bridge for robotics or actuator control.

IC Role / Device Role / Timing Role: High-side PNP switch enabling bidirectional motor control with single-supply logic interface.

Use Value: Fast t_f and low C_ob minimize shoot-through risk during direction reversal, increasing system robustness.

Use Scenario: Solid-state replacement for electromechanical relays in PLC I/O modules and HVAC controllers.

IC Role / Device Role / Timing Role: Interface transistor amplifying microcontroller GPIO signals to energize 24 V relay coils.

Use Value: –3 A I_C rating supports direct drive of high-coil-inductance relays without external Darlington stages.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3906LT1G	Lower I_C (–200 mA), lower V_CEO (–40 V), higher V_CE(sat) (–300 mV @ –50 mA); SOT-23 package.	Suitable only for signal-level switching; not rated for motor or relay loads requiring >500 mA.	Select when cost sensitivity outweighs power handling needs and board space permits derated operation.
PN2907A	TO-92 through-hole package; same –60 V V_CEO, but lower f_T (200 MHz) and slower t_f (60 ns); no Pb-free TL reel option.	Requires manual soldering or wave-solder compatible layout; unsuitable for automated SMT production.	Choose only for legacy repair, prototyping, or low-volume through-hole designs where reflow compatibility is not required.

Compared with MMBT3906LT1G and PN2907A, the CPH3205-TL-E uniquely combines –3 A current capability, –50 V rating, SOT-23 surface-mount packaging, and sub-150 mV saturation voltage-making it the only viable option for high-density, high-current PNP switching in modern automated manufacturing.

Availability

CPH3205-TL-E is available at Aetrix Electronics and suitable for DC-DC converters, motor drivers, and relay drivers requiring stable component supply, RoHS-compliant packaging, and consistent SMT placement performance.

Supply support for CPH3205-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 markets.

The CPH3205-TL-E belongs to onsemi's CPH3-series PNP transistors, engineered for high-current, low-V_CE(sat) switching in compact power interfaces-targeting space-constrained industrial controls and portable power systems.

FAQ

What is the maximum continuous collector current rating for CPH3205-TL-E?

The CPH3205-TL-E is rated for –3 A continuous collector current (I_C) at T_a = 25 °C when mounted on a ceramic substrate (600 mm² × 0.8 mm). Derating applies above 25 °C ambient, with full derating to zero at 150 °C junction temperature. This rating is validated per onsemi's Absolute Maximum Ratings table and supports sustained operation in motor and relay driver applications without forced cooling.

Is CPH3205-TL-E a PNP or NPN transistor?

CPH3205-TL-E is a PNP bipolar junction transistor, as confirmed by its negative voltage and current polarity ratings: V_CEO = –50 V, I_C = –3 A, and V_CE(sat) values specified with negative signs. Its pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector) follows standard PNP SOT-23 orientation, requiring negative base-emitter bias to achieve saturation.

What is the typical V_CE(sat) of CPH3205-TL-E at I_C = –2 A?

The typical collector-to-emitter saturation voltage (V_CE(sat)) of CPH3205-TL-E is –140 mV at I_C = –2 A and I_B = –100 mA, per the Electrical Characteristics table in the official onsemi datasheet (No.6084-2/7). This value reflects low conduction loss critical for efficiency in high-current switching applications such as DC-DC converters and motor drivers.

Does CPH3205-TL-E have Pb-free construction?

Yes, CPH3205-TL-E features Pb-free terminations and complies with RoHS Directive 2011/65/EU, as explicitly stated in the Ordering Information section and Embossed Taping Specification (No.6084-5/7). The "-E" suffix denotes Pb-free packaging, and the device is supplied on 3,000-piece TL reels compatible with lead-free reflow profiles.

What package type does CPH3205-TL-E use, and is it compatible with standard SOT-23 footprints?

CPH3205-TL-E uses the CPH3 package, which is mechanically identical to JEDEC TO-236 and JEITA SC-59-commonly referred to as SOT-23. Its dimensions (2.9 mm × 1.6 mm × 0.9 mm) and 3-pin layout match industry-standard SOT-23 land patterns, enabling drop-in compatibility with existing SMT assembly lines and PCB footprints designed for SOT-23 discrete transistors.

CPH3205-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

CPH3205-TL-E FAQ

1.How can I place an order for CPH3205-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for CPH3205-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 CPH3205-TL-E reliable?

The price and inventory of CPH3205-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 CPH3205-TL-E is usually 5 days.

3.What payment methods are accepted for CPH3205-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CPH3205-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CPH3205-TL-E?

CPH3205-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CPH3205-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 CPH3205-TL-E?

For technical support, including CPH3205-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CPH3205-TL-E requirements.

6.How does Aetrix verify that CPH3205-TL-E is sourced from the original manufacturer or authorized distributors?

All CPH3205-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 CPH3205-TL-E meets industry standards.

7.What is the process for return or replacement of CPH3205-TL-E?

All CPH3205-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with CPH3205-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 CPH3205-TL-E part is unused and in its original packaging.

Return procedure for CPH3205-TL-E:

1.Submit a request within 90 days.

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

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