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 CPH3212-TL-E

Name: CPH3212-TL-E
Brand: onsemi
SKU: CPH3212-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CPH3212-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: CPH3212-TL-E.pdf

Description:: TRANS NPN 50V 5A 3-CPH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,348

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

Product details

Overview

CPH3212-TL-E from onsemi is an NPN bipolar transistor in CPH3 (SC-59/TO-236/SOT-23) package, rated for 50 V V_CEO, 5 A I_C, and 150 mV V_CE(sat) at I_C = 2 A / I_B = 40 mA. It delivers high current gain (h_FE = 200–560), 330 MHz f_T, and low switching times (t_on = 32 ns, t_f = 28 ns), enabling efficient use in relay, lamp, and motor driver circuits.

For engineers reviewing the CPH3212-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include its ultrasmall 0.9 mm mounting height, 0.9 W power dissipation on ceramic substrate, low V_CE(sat), high I_C/I_CP ratings, and SC-59-compatible footprint for space-constrained DC switching designs.

Technical Context

The CPH3212-TL-E is a single NPN silicon transistor optimized for medium-power switching with fast turn-on and fall characteristics. Its MBIT process enables high current handling (5 A continuous, 7 A pulse) and low saturation voltage while maintaining thermal robustness up to 150 °C junction temperature.

Designed for DC-coupled load control, it operates with base-emitter drive compatible with standard logic-level signals (V_BE(sat) = 0.8–1.2 V at I_C = 2 A), and exhibits low output capacitance (C_ob = 26 pF at V_CB = 10 V) to support clean switching waveforms in inductive load applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage under open-base conditions; defines usable supply rail headroom in switch-mode loads.
I_C	5 A - Continuous collector current rating; supports driving relays, lamps, or small DC motors without external heatsinking.
V_CE(sat)	100–150 mV at I_C = 2 A / I_B = 40 mA - Low conduction loss reduces power dissipation and self-heating during on-state operation.
f_T	330 MHz - Gain-bandwidth product confirms suitability for high-speed switching up to ~10–20 MHz practical edge rates.
h_FE	200–560 at V_CE = 2 V, I_C = 500 mA - High DC current gain allows modest base drive (e.g., 10 mA drives ~5 A load at h_FE = 500).
t_on/t_f	32 ns / 28 ns - Fast switching minimizes transition losses and EMI generation in PWM-driven loads.
P_C	0.9 W on 600 mm² × 0.8 mm ceramic - Power handling capability enables compact board layout without forced cooling.

Pinout & Package

CPH3212-TL-E uses the CPH3 package (JEITA SC-59 / JEDEC TO-236 / industry-standard SOT-23), measuring 2.9 mm × 1.6 mm × 0.9 mm with 0.95 mm lead pitch and 0.9 mm max mounting height. The ultrasmall footprint supports miniaturized PCBs in portable and space-limited industrial modules.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input terminal; requires ~40 mA base current to saturate 2 A collector load (IC/IB = 50).
2	Emitter	Common return path; connected to ground or low-side reference in typical low-side switch configurations.
3	Collector	High-current output terminal; connects to load (e.g., relay coil, lamp anode, motor terminal) and positive supply rail.

Key Features

Feature	Design Value
Ultrasmall CPH3 package	0.9 mm max height enables ultra-thin end products such as handheld controllers and compact sensor modules.
Low V_CE(sat)	100–150 mV reduces conduction loss by >50% vs. standard general-purpose transistors at 2 A load.
High allowable power dissipation	0.9 W on ceramic substrate permits sustained 5 A operation without thermal derating in thermally optimized layouts.
Fast switching performance	32 ns turn-on + 28 ns fall time supports PWM frequencies up to 1–2 MHz with minimal dead-time overhead.
High current gain bandwidth	330 MHz f_T ensures stable gain and predictable switching behavior across wide operating current range (0.01–5 A).

Applications

Relay Driver Circuit	Lamp Driver Module
Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and industrial control panels. IC Role / Device Role / Timing Role: Low-side NPN switch controlling relay coil current with fast turn-off to suppress back-EMF-induced contact arcing. Use Value: 150 mV V_CE(sat) minimizes coil voltage drop, ensuring reliable relay pull-in at low supply voltages; 420 ns storage time is managed via Baker clamp or base resistor tuning.	Use Scenario: Switching incandescent or LED indicator lamps in automotive dashboards and medical device status panels. IC Role / Device Role / Timing Role: Constant-current or on/off switch regulating lamp brightness or state with minimal thermal rise. Use Value: 5 A I_C rating supports parallel lamp strings; 0.9 mm profile fits behind thin front-panel overlays without mechanical interference.
DC Motor Control Stage	Industrial Solenoid Interface
Use Scenario: H-bridge half-bridge or discrete PWM stage for 5–24 V brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: High-current switching element in low-side configuration, synchronized with gate drivers or microcontroller PWM outputs. Use Value: 330 MHz f_T and 28 ns fall time enable crisp PWM edges at 20 kHz, reducing audible motor whine and copper loss.	Use Scenario: Controlling 24 V solenoid valves in pneumatic/hydraulic control systems with strict duty-cycle limits. IC Role / Device Role / Timing Role: Solid-state replacement for mechanical contactors, delivering precise on/off timing and eliminating bounce-related wear. Use Value: 7 A I_CP rating accommodates solenoid inrush current; 150 °C T_j rating sustains operation in enclosed enclosures up to 85 °C ambient.

Relay Driver Circuit

Lamp Driver Module

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and industrial control panels.

IC Role / Device Role / Timing Role: Low-side NPN switch controlling relay coil current with fast turn-off to suppress back-EMF-induced contact arcing.

Use Value: 150 mV V_CE(sat) minimizes coil voltage drop, ensuring reliable relay pull-in at low supply voltages; 420 ns storage time is managed via Baker clamp or base resistor tuning.

Use Scenario: Switching incandescent or LED indicator lamps in automotive dashboards and medical device status panels.

IC Role / Device Role / Timing Role: Constant-current or on/off switch regulating lamp brightness or state with minimal thermal rise.

Use Value: 5 A I_C rating supports parallel lamp strings; 0.9 mm profile fits behind thin front-panel overlays without mechanical interference.

DC Motor Control Stage

Industrial Solenoid Interface

Use Scenario: H-bridge half-bridge or discrete PWM stage for 5–24 V brushed DC motors in factory automation actuators.

IC Role / Device Role / Timing Role: High-current switching element in low-side configuration, synchronized with gate drivers or microcontroller PWM outputs.

Use Value: 330 MHz f_T and 28 ns fall time enable crisp PWM edges at 20 kHz, reducing audible motor whine and copper loss.

Use Scenario: Controlling 24 V solenoid valves in pneumatic/hydraulic control systems with strict duty-cycle limits.

IC Role / Device Role / Timing Role: Solid-state replacement for mechanical contactors, delivering precise on/off timing and eliminating bounce-related wear.

Use Value: 7 A I_CP rating accommodates solenoid inrush current; 150 °C T_j rating sustains operation in enclosed enclosures up to 85 °C ambient.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT5551LT1G	Lower I_C (600 mA), higher V_CEO (160 V), smaller SOT-23 package; no pulse current rating.	Suitable for signal amplification or low-power switching only; not rated for 2–5 A loads.	Select when voltage isolation >100 V is required and current demand <0.6 A.
BC817-40,215	Same SOT-23 package, but lower I_C (500 mA), higher V_CE(sat) (~300 mV), and lower f_T (100 MHz).	Targeted at general-purpose logic-level switching, not high-current load control.	Choose for cost-sensitive, low-power applications where thermal and speed constraints are relaxed.

Compared with MMBT5551LT1G and BC817-40,215, the CPH3212-TL-E provides 10× higher continuous current, sub-150 mV saturation voltage, and 3× higher switching speed-making it uniquely suited for compact, high-efficiency DC load switching where space and thermal management are critical.

Availability

CPH3212-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and motor drivers requiring stable component supply, Pb-free compliance, and tape-and-reel delivery (3,000 pcs./reel).

Supply support for CPH3212-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 management, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.

The CPH3212-TL-E belongs to onsemi's CPH series of high-current, low-V_CE(sat) bipolar transistors designed specifically for miniaturized, high-reliability DC switching in industrial controls and power interface modules.

FAQ

What is the maximum continuous collector current for CPH3212-TL-E?

The CPH3212-TL-E has a maximum continuous collector current (I_C) rating of 5 A at T_a = 25 °C when mounted on a specified ceramic substrate (600 mm² × 0.8 mm). Derating applies above 25 °C ambient, per the PC–Ta curve in the datasheet. This rating makes CPH3212-TL-E suitable for driving relays, lamps, and small DC motors without auxiliary heatsinking in well-ventilated layouts.

Does CPH3212-TL-E support pulse current operation?

Yes, CPH3212-TL-E supports a peak collector current (I_CP) of 7 A under pulsed conditions, as defined in the Absolute Maximum Ratings table. This pulse rating applies to short-duration, non-repetitive events (e.g., solenoid inrush or motor startup surges), provided the average power dissipation remains within the 0.9 W limit and junction temperature stays below 150 °C. Always verify thermal design margins using the transient thermal impedance curves.

What is the pin configuration of CPH3212-TL-E?

CPH3212-TL-E uses the CPH3 package with a 3-pin SOT-23 outline: Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector. This matches JEITA SC-59 and JEDEC TO-236 standards. The marking "TL" appears adjacent to Pin 1, and the device orientation follows standard SOT-23 top-view conventions (flat side facing viewer, Pin 1 bottom-left). Confirm layout compatibility using the land pattern example in the official CPH3212 datasheet.

Is CPH3212-TL-E RoHS and Pb-free compliant?

Yes, CPH3212-TL-E is Pb-free and RoHS-compliant, as confirmed in the Ordering Information section ("Pb Free" memo) and packaging specification. The device meets EU Directive 2011/65/EU and is suitable for use in environmentally regulated industrial and consumer applications. Aetrix Electronics guarantees full compliance documentation and material declarations upon request for CPH3212-TL-E shipments.

What is the typical V_CE(sat) of CPH3212-TL-E at rated current?

The typical collector-to-emitter saturation voltage (V_CE(sat)) of CPH3212-TL-E is 100 mV at I_C = 2 A and I_B = 40 mA (IC/IB = 50), with a maximum of 150 mV under the same conditions. This low saturation voltage directly reduces conduction loss and improves system efficiency-especially critical in battery-powered or thermally constrained relay and lamp driver designs using CPH3212-TL-E.

CPH3212-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:: NPN

Current - Collector (Ic) (Max):: 5 A

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

Vce Saturation (Max) @ Ib, Ic:: 150mV @ 40mA, 2A

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

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

Power - Max:: 900 mW

Frequency - Transition:: 330MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-CPH

CPH3212-TL-E FAQ

1.How can I place an order for CPH3212-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for CPH3212-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 CPH3212-TL-E reliable?

The price and inventory of CPH3212-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 CPH3212-TL-E is usually 5 days.

3.What payment methods are accepted for CPH3212-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CPH3212-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CPH3212-TL-E?

CPH3212-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CPH3212-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 CPH3212-TL-E?

For technical support, including CPH3212-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CPH3212-TL-E requirements.

6.How does Aetrix verify that CPH3212-TL-E is sourced from the original manufacturer or authorized distributors?

All CPH3212-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 CPH3212-TL-E meets industry standards.

7.What is the process for return or replacement of CPH3212-TL-E?

All CPH3212-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with CPH3212-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 CPH3212-TL-E part is unused and in its original packaging.

Return procedure for CPH3212-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…