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onsemi CPH3123-TL-E
- Part No.:
- CPH3123-TL-E
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
CPH3123-TL-E.pdf
- Description:
- TRANS PNP 50V 3A 3-CPH
- Quantity:
- Payment:
- Shipping:
Inventory:5,232
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Product details
Overview
CPH3123-TL-E from onsemi is a PNP bipolar junction transistor in an ultrasmall CPH3 (SOT-23) package, rated for –50 V VCEO, –3 A IC, and 0.9 W power dissipation on ceramic substrate. It delivers low VCE(sat) of –90 mV (typ) at –1 A/–50 mA drive and supports high-speed switching with 35 ns turn-on time. It is used in compact DC-DC converter output stages and relay drivers where space and thermal efficiency are critical.
For engineers reviewing the CPH3123-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, confirmed –50 V/–3 A ratings, validated SOT-23 (CPH3) mechanical footprint, low saturation voltage under pulsed load, and compatibility with Pb-free reflow profiles.
Technical Context
The CPH3123-TL-E is a discrete PNP BJT optimized for medium-power switching in space-constrained applications. Its MBIT process enables high current gain (hFE = 200–560 at –2 V VCE, –100 mA IC) and high fT of 380 MHz (typ), supporting fast transitions in motor and lamp driver circuits.
It operates within a –55°C to +150°C storage range and 150°C maximum junction temperature. The device exhibits low output capacitance (Cob = 13 pF typ at –10 V VCB, 1 MHz) and tight VBE(sat) (–0.88 V typ at –2 A/–100 mA), enabling efficient base drive design and reduced switching losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –50 V - Maximum safe collector-emitter voltage under open-base condition; defines breakdown margin in high-side switch configurations. |
| IC | –3 A - Continuous collector current rating; supports sustained 3 A load switching without derating on 600 mm² ceramic substrate. |
| VCE(sat)1 | –90 mV (typ) at –1 A/–50 mA - Enables <100 mV conduction loss in low-voltage rail control, reducing heat generation in battery-powered systems. |
| hFE | 200–560 at –2 V VCE, –100 mA - Provides stable current amplification across production lots, simplifying base resistor selection for digital drive. |
| fT | 380 MHz (typ) at –10 V VCE, –500 mA - Supports >100 kHz PWM operation with minimal gain roll-off in switching regulators. |
| Cob | 13 pF (typ) at –10 V VCB, 1 MHz - Limits Miller effect during turn-off, improving switching speed and reducing gate drive energy in hybrid driver stages. |
| Package | CPH3 (JEITA SC-59 / JEDEC TO-236 / SOT-23) - 0.9 mm max height, 2.9 × 1.6 mm footprint; compatible with standard SOT-23 pick-and-place and reflow processes. |
Pinout & Package
CPH3123-TL-E uses the CPH3 surface-mount package (equivalent to SOT-23), with 3 terminals arranged in a single-row configuration. Mounting height is 0.9 mm, enabling ultra-thin PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input terminal; requires –50 mA typical drive current to saturate at –1 A collector load. |
| 2 | Emitter | Common reference node for PNP operation; connected to higher potential rail (e.g., VCC) in high-side switch topologies. |
| 3 | Collector | Output terminal; sinks current to load when base is driven low; rated for –3 A continuous and –6 A pulsed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | –90 mV (typ) at –1 A/–50 mA - Reduces conduction loss by >40% vs. legacy PNP transistors, extending battery life in portable DC-DC modules. |
| High-speed switching | 35 ns turn-on, 300 ns storage, 25 ns fall - Enables clean 200 kHz+ PWM in synchronous buck controllers without shoot-through risk. |
| Ultrasmall CPH3 package | 2.9 × 1.6 × 0.9 mm - Saves >60% board area vs. SOT-223; supports 0.5 mm pitch routing and automated optical inspection. |
| High power dissipation | 0.9 W on 600 mm² ceramic substrate - Allows direct mounting on thermally enhanced layers without heatsinks in 5 W-class drivers. |
| Pb-free TL reel packaging | 3,000 pcs./reel, RoHS-compliant - Meets IPC-J-STD-020D moisture sensitivity level 1; supports lead-free reflow up to 260°C peak. |
Applications
| DC-DC Converter Output Stage | Relay Driver Circuit |
|---|---|
|
Use Scenario: High-efficiency 12 V to 5 V buck converter in industrial IoT gateway, operating at 250 kHz with 2 A load. IC Role / Device Role / Timing Role: PNP switch in synchronous rectifier or high-side active clamp stage, replacing Schottky diode to reduce forward drop. Use Value: VCE(sat) of –90 mV cuts conduction loss by 65% vs. 0.4 V diode drop, improving full-load efficiency from 87% to 92%. |
Use Scenario: Microcontroller-driven 24 V relay interface in PLC I/O module, requiring fast de-energization and EMI suppression. IC Role / Device Role / Timing Role: PNP switch controlling relay coil current path; base driven by MCU GPIO through current-limiting resistor. Use Value: 35 ns turn-on and 25 ns fall time ensure relay contact closure within 100 µs, meeting IEC 61000-4-4 surge immunity timing constraints. |
| Lamp Driver for Automotive Interior Lighting | Motor Driver for Small DC Brushed Motor |
|
Use Scenario: PWM-controlled LED strip driver in automotive cabin lighting, dimming 12 V, 2 A loads at 1 kHz. IC Role / Device Role / Timing Role: Low-side PNP switch (emitter grounded, collector to LED anode) enabling common-cathode topology with MCU-compatible logic levels. Use Value: hFE ≥200 ensures <5 mA base drive suffices for 2 A load, eliminating need for Darlington or MOSFET gate driver ICs. |
Use Scenario: Bidirectional 6 V, 1.5 A brushed motor control in medical pump actuator, using H-bridge with discrete PNP/NPN pairs. IC Role / Device Role / Timing Role: Upper-leg PNP switch in half-bridge leg; paired with NPN CPH3223-TL-E for complementary drive. Use Value: Matched VCE(sat) and fT between CPH3123-TL-E and CPH3223-TL-E minimize shoot-through window and improve bridge efficiency by 8%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP bipolar switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3906LT1G | VCEO = –40 V, IC = –200 mA, VCE(sat) = –300 mV (typ) at –50 mA/–5 mA - lower voltage/current rating and higher saturation voltage. | Not suitable for >1 A loads or –50 V bus rails; limited to signal-level switching and low-power logic inversion. | Select CPH3123-TL-E when ≥–3 A current, ≤–100 mV VCE(sat), or –50 V blocking is required; MMBT3906LT1G fits only sub-200 mA bias networks. |
| DXT3906-7-F | VCEO = –40 V, IC = –2 A, VCE(sat) = –200 mV (typ) at –1 A/–50 mA - 100 mV higher saturation voltage and 10 V lower breakdown than CPH3123-TL-E. | Adequate for 24 V relay drivers but marginal for 48 V DC-DC outputs due to reduced voltage headroom and higher conduction loss. | Choose CPH3123-TL-E for designs needing –50 V rating, <–100 mV VCE(sat), or operation above 85°C ambient; DXT3906-7-F suits cost-sensitive 24 V industrial controls. |
Compared with MMBT3906LT1G and DXT3906-7-F, the CPH3123-TL-E provides superior voltage headroom, lower conduction loss, and higher thermal capability - making it the preferred choice for 3 A, –50 V switching nodes where efficiency and reliability are prioritized over minimal BOM cost.
Availability
CPH3123-TL-E is available at Aetrix Electronics and suitable for DC-DC converters, relay drivers, and lamp drivers requiring stable component supply, consistent Pb-free compliance, and guaranteed SOT-23 mechanical form factor across production batches.
Supply support for CPH3123-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 CPH3123-TL-E belongs to onsemi's CPH series of high-performance bipolar transistors, engineered for compact, high-current switching in space- and thermal-constrained power management circuits.
FAQ
What is the absolute maximum collector-to-emitter voltage rating for CPH3123-TL-E?
The absolute maximum VCEO rating for CPH3123-TL-E is –50 V at Ta = 25°C. This value is specified with RBE = ∞ and IC = –1 mA. Exceeding this voltage risks permanent breakdown. The CPH3123-TL-E must not be operated above –50 V in any steady-state or transient condition without external clamping.
Does CPH3123-TL-E support Pb-free reflow soldering?
Yes, CPH3123-TL-E is Pb-free and qualified for lead-free reflow per J-STD-020D. Its TL reel packaging is rated for peak temperatures up to 260°C with 60-second duration. The device passes MSL Level 1 testing, allowing unlimited floor life when sealed in dry pack.
What is the typical DC current gain (hFE) of CPH3123-TL-E at –100 mA collector current?
The typical hFE of CPH3123-TL-E is 380 at VCE = –2 V and IC = –100 mA, with a minimum of 200 and maximum of 560 across the production lot. This gain stability supports predictable base resistor sizing in digital-switched applications.
How does the CPH3123-TL-E package compare to standard SOT-23?
The CPH3123-TL-E uses the CPH3 package, which is mechanically identical to JEDEC TO-236 and JEITA SC-59 - standardized equivalents of SOT-23. Its dimensions (2.9 × 1.6 × 0.9 mm) and pinout (1=Base, 2=Emitter, 3=Collector) match industry-standard SOT-23 footprints, ensuring full layout compatibility.
Can CPH3123-TL-E be used in parallel with CPH3223-TL-E in complementary circuits?
Yes, CPH3123-TL-E (PNP) and CPH3223-TL-E (NPN) share identical CPH3 packaging, thermal characteristics, and matched dynamic parameters (e.g., fT, ton/tf). This pairing is explicitly supported in onsemi's documentation for push-pull and H-bridge configurations requiring symmetrical switching behavior.
CPH3123-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:
- 650mV @ 100mA, 2A
- Current - Collector Cutoff (Max):
- 1µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 100mA, 2V
- Power - Max:
- 900 mW
- Frequency - Transition:
- 390MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-CPH
CPH3123-TL-E FAQ
1.How can I place an order for CPH3123-TL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for CPH3123-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 CPH3123-TL-E reliable?
The price and inventory of CPH3123-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 CPH3123-TL-E is usually 5 days.
3.What payment methods are accepted for CPH3123-TL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CPH3123-TL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CPH3123-TL-E?
CPH3123-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CPH3123-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 CPH3123-TL-E?
For technical support, including CPH3123-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CPH3123-TL-E requirements.
6.How does Aetrix verify that CPH3123-TL-E is sourced from the original manufacturer or authorized distributors?
All CPH3123-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 CPH3123-TL-E meets industry standards.
7.What is the process for return or replacement of CPH3123-TL-E?
All CPH3123-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with CPH3123-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 CPH3123-TL-E part is unused and in its original packaging.
Return procedure for CPH3123-TL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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