Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi CPH3109-TL-E

Name: CPH3109-TL-E
Brand: onsemi
SKU: CPH3109-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CPH3109-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: CPH3109-TL-E.pdf

Description:: TRANS PNP 30V 3A 3-CPH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,570

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CPH3109-TL-E from onsemi is a PNP bipolar junction transistor rated for –30 V V_CEO, –3 A I_C, with low V_CE(sat) of –120 mV (typ) at I_C = –1.5 A / I_B = –30 mA, high-speed switching (t_on = 30 ns typ), and housed in the ultrasmall CPH3 (SC-59/SOT-23) package. It serves as a compact, high-current switch in relay drivers and motor control stages.

For engineers reviewing the CPH3109-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, –30 V breakdown rating, low saturation voltage under pulsed load, thermal performance on ceramic substrate, and JEDEC-compliant SOT-23 footprint compatibility.

Technical Context

The CPH3109-TL-E operates as a single PNP BJT optimized for medium-power switching. Its design emphasizes low V_CE(sat) (–120 mV typ) and fast transient response (t_f = 15 ns typ), enabled by onsemi's MBIT process. It supports DC and pulsed operation up to I_CP = –5 A with T_j ≤ 150°C.

Electrical behavior is characterized at T_a = 25°C with defined test conditions: h_FE = 200–560 at V_CE = –2 V / I_C = –500 mA; f_T = 450 MHz typ at V_CE = –10 V / I_C = –500 mA; Cob = 20 pF typ at V_CB = –10 V / f = 1 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–30 V - Maximum safe collector-emitter voltage before breakdown in open-base configuration
I_C	–3 A - Continuous DC collector current rating under specified thermal mounting conditions
V_CE(sat)	–120 mV (typ) at I_C = –1.5 A / I_B = –30 mA - Enables low conduction loss in high-side switching
f_T	450 MHz (typ) at V_CE = –10 V / I_C = –500 mA - Supports high-frequency switching up to several hundred MHz
h_FE	200–560 at V_CE = –2 V / I_C = –500 mA - Provides stable current amplification across production lot
P_C	0.9 W on 600 mm² ceramic substrate - Defines maximum power dissipation with validated thermal interface
Cob	20 pF (typ) at V_CB = –10 V / f = 1 MHz - Limits high-frequency Miller capacitance in switching nodes

Pinout & Package

CPH3109-TL-E uses the CPH3 package - identical to JEITA SC-59, JEDEC TO-236, and industry-standard SOT-23 - with 0.9 mm max height, 2.9 mm × 1.6 mm footprint, and Pb-free plating. Mounting requires standard reflow profiles for small-outline transistors.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input terminal	Receives base drive current to turn on PNP conduction; requires negative bias relative to emitter for activation
2 (Emitter)	Current source terminal	Connected to higher potential rail in high-side switch configurations; carries full load current
3 (Collector)	Load connection terminal	Interfaces with switched load (e.g., relay coil, lamp anode); voltage swings negative during conduction

Key Features

Feature	Design Value
Low V_CE(sat)	–120 mV typical enables <150 mW conduction loss at 1.5 A, reducing thermal stress in space-constrained designs
High-speed switching	30 ns turn-on, 15 ns fall time allows clean PWM operation up to ~10 MHz without excessive ringing
Ultrasmall CPH3 package	0.9 mm height and SOT-23 compatibility support ultra-thin end-equipment such as portable medical devices and wearables
High allowable power dissipation	0.9 W rating on ceramic substrate permits sustained 3 A operation where PCB copper area is limited
MBIT process technology	Enables tight parameter distribution (h_FE 200–560) and robust ESD tolerance without external protection

Applications

Relay Drivers	Lamp Drivers
Use Scenario: Driving electromagnetic relays in industrial PLC output modules requiring fast, low-loss switching of 24 V DC coils. IC Role / Device Role / Timing Role: PNP high-side switch controlling coil current path; activated by microcontroller GPIO with inverted logic. Use Value: Low V_CE(sat) minimizes self-heating during continuous duty; high h_FE reduces required base drive current, easing MCU sourcing capability.	Use Scenario: Switching incandescent or LED indicator lamps in automotive dashboards and appliance control panels. IC Role / Device Role / Timing Role: Medium-current PNP switch interfacing between low-voltage logic and 12 V lamp supply rails. Use Value: Fast t_f = 15 ns prevents visible flicker during PWM dimming; ultrasmall CPH3 footprint saves board area in dense front-panel layouts.
Motor Drivers	Strobe Circuits
Use Scenario: Controlling small DC brush motors (e.g., cooling fans, actuator drives) in battery-powered IoT gateways. IC Role / Device Role / Timing Role: Single-transistor H-bridge half-leg or unidirectional current switch in low-cost motor control stages. Use Value: –3 A I_C rating supports peak startup currents; high f_T ensures stable gain during rapid direction changes.	Use Scenario: Triggering xenon flash tubes or high-intensity LED strobes in security cameras and machine vision lighting. IC Role / Device Role / Timing Role: High-current pulse switch delivering short-duration, high-amplitude current bursts to discharge capacitors into loads. Use Value: –5 A I_CP rating handles 100 μs pulses without thermal runaway; low Cob limits parasitic coupling during fast edge transitions.

Relay Drivers

Lamp Drivers

Use Scenario: Driving electromagnetic relays in industrial PLC output modules requiring fast, low-loss switching of 24 V DC coils.

IC Role / Device Role / Timing Role: PNP high-side switch controlling coil current path; activated by microcontroller GPIO with inverted logic.

Use Value: Low V_CE(sat) minimizes self-heating during continuous duty; high h_FE reduces required base drive current, easing MCU sourcing capability.

Use Scenario: Switching incandescent or LED indicator lamps in automotive dashboards and appliance control panels.

IC Role / Device Role / Timing Role: Medium-current PNP switch interfacing between low-voltage logic and 12 V lamp supply rails.

Use Value: Fast t_f = 15 ns prevents visible flicker during PWM dimming; ultrasmall CPH3 footprint saves board area in dense front-panel layouts.

Motor Drivers

Strobe Circuits

Use Scenario: Controlling small DC brush motors (e.g., cooling fans, actuator drives) in battery-powered IoT gateways.

IC Role / Device Role / Timing Role: Single-transistor H-bridge half-leg or unidirectional current switch in low-cost motor control stages.

Use Value: –3 A I_C rating supports peak startup currents; high f_T ensures stable gain during rapid direction changes.

Use Scenario: Triggering xenon flash tubes or high-intensity LED strobes in security cameras and machine vision lighting.

IC Role / Device Role / Timing Role: High-current pulse switch delivering short-duration, high-amplitude current bursts to discharge capacitors into loads.

Use Value: –5 A I_CP rating handles 100 μs pulses without thermal runaway; low Cob limits parasitic coupling during fast edge transitions.

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	V_CEO = –40 V, I_C = –200 mA, V_CE(sat) = –300 mV @ –50 mA - lower current, higher saturation voltage	Not suitable for >500 mA loads; better for signal-level inversion or low-power logic interfaces	Select when only small-signal switching is needed and board space allows larger SOT-23 variants
PN2907A	V_CEO = –60 V, I_C = –600 mA, V_CE(sat) = –1.6 V @ –500 mA - higher saturation loss, TO-92 packaging	Requires through-hole assembly; unsuitable for automated SMT lines or thin-profile enclosures	Choose only for legacy through-hole designs where thermal mass of TO-92 improves reliability at moderate ambient temperatures

Compared with MMBT3906LT1G and PN2907A, the CPH3109-TL-E delivers 15× higher continuous current, 2.5× lower V_CE(sat), and SMT-compatible CPH3 packaging - making it uniquely suited for compact, high-efficiency medium-power switching where thermal and space constraints dominate.

Availability

CPH3109-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and motor drivers requiring stable component supply, consistent parametric performance across production lots, and RoHS-compliant packaging.

Supply support for CPH3109-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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The CPH3109-TL-E belongs to onsemi's general-purpose bipolar transistor product line, engineered specifically for high-reliability, medium-current switching in space-constrained industrial and consumer systems.

FAQ

What is the polarity and transistor type of CPH3109-TL-E?

The CPH3109-TL-E is a PNP bipolar junction transistor. Its absolute maximum ratings confirm negative-polarity parameters: V_CEO = –30 V, I_C = –3 A, and V_CE(sat) values are specified with negative signs. This polarity defines its use as a high-side switch where the emitter connects to the positive rail and the collector sinks load current to ground or a lower potential.

What package does CPH3109-TL-E use, and is it compatible with standard SOT-23 footprints?

The CPH3109-TL-E uses the CPH3 package, which is mechanically identical to JEITA SC-59, JEDEC TO-236, and standard SOT-23 outlines. Its dimensions (2.9 mm × 1.6 mm × 0.9 mm max) and 3-pin terminal layout match IPC-7351-compliant SOT-23 land patterns, enabling drop-in placement on existing SMT assembly lines without footprint modification.

What is the maximum pulsed collector current rating for CPH3109-TL-E?

The CPH3109-TL-E has a maximum pulsed collector current I_CP of –5 A, specified for single-pulse operation with 100 μs duration and ≤1% duty cycle. This rating assumes mounting on a 600 mm² ceramic substrate per the datasheet thermal test condition and is intended for short-duration overload handling, not continuous operation.

Does CPH3109-TL-E have Pb-free construction, and what does the "-E" suffix indicate?

Yes, the CPH3109-TL-E is Pb-free, as confirmed by the "Pb Free" notation in the Ordering Information table and the "-E" suffix in the part number. The "-E" denotes compliance with JEDEC J-STD-609A Class 2a marking requirements and indicates that the device meets RoHS Directive 2011/65/EU Annex II substance restrictions.

How does the CPH3109-TL-E's DC current gain (h_FE) vary with operating conditions?

The CPH3109-TL-E exhibits h_FE = 200–560 at V_CE = –2 V and I_C = –500 mA, with variation dependent on temperature and current level. Graph IT08073 shows h_FE decreases at I_C > 1 A and increases slightly at elevated T_a; minimum guaranteed h_FE remains ≥200 across the full –25°C to +75°C operating range per datasheet Fig. 6.

CPH3109-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):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 230mV @ 30mA, 1.5A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 900 mW

Frequency - Transition:: 380MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-CPH

CPH3109-TL-E FAQ

1.How can I place an order for CPH3109-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for CPH3109-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 CPH3109-TL-E reliable?

The price and inventory of CPH3109-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 CPH3109-TL-E is usually 5 days.

3.What payment methods are accepted for CPH3109-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CPH3109-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CPH3109-TL-E?

CPH3109-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CPH3109-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 CPH3109-TL-E?

For technical support, including CPH3109-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CPH3109-TL-E requirements.

6.How does Aetrix verify that CPH3109-TL-E is sourced from the original manufacturer or authorized distributors?

All CPH3109-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 CPH3109-TL-E meets industry standards.

7.What is the process for return or replacement of CPH3109-TL-E?

All CPH3109-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with CPH3109-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 CPH3109-TL-E part is unused and in its original packaging.

Return procedure for CPH3109-TL-E:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…