PDTC123ET Nexperia Transistor BJT NPN (SOT23 (3-Pin)) In Stock
Nexperia PDTC123ET is a digital NPN transistor in SOT-23 (TO-236AB) with built-in 2.2 kΩ base bias resistors (R1:R2 ratio of 1) rated at 100 mA collector current and 50 V VCEo. Minimum hFE of 30 suits direct MCU GPIO switching without external resistors. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTC123ET Datasheet PDF
- Category
- Transistor BJT NPN
- Price
- From $0.0551(MOQ 3360)
- Temp Range
- -65.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PDTC123ET?
- Built-in 2.2 kΩ base bias resistors with 1:1 R1:R2 ratio eliminating external base-emitter resistors and simplifying PCB layout
- 100 mA maximum collector current and 50 V VCE rating covering a wide range of LED, relay, and small-load switching applications
- SOT-23 (TO-236AB) 3-pin package enabling very compact digital switching circuits with minimum hFE of 30 for reliable saturation from 3.3 V and 5 V logic
What is PDTC123ET used for?
The PDTC123ET is designed for direct microcontroller GPIO-driven switching of small loads such as LEDs, optocouplers, relay coils, and logic-level signal conditioning. Its built-in 2.2 kΩ resistors make it a drop-in solution for replacing discrete NPN transistor plus resistor combinations in consumer electronics, IoT devices, and automotive auxiliary control circuits.
What are the specifications of PDTC123ET?
| Date Of Intro | 1997-12-15 |
| YTEOL | 7 |
| Additional Feature | BUILT IN BIAS RESISTANCE RATIO IS 1 |
| Collector Current-Max (IC) | 0.1A |
| Collector-Emitter Voltage-Max | 50V |
| Configuration | SINGLE WITH BUILT-IN RESISTOR |
| DC Current Gain-Min (hFE) | 30 |
| JEDEC-95 Code | TO-236AB |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity/Channel Type | NPN |
| Surface Mount | YES |
| Terminal Finish | TIN |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| Country of Origin | Mainland China, Malaysia |
Where can I find the PDTC123ET datasheet?
PDTC123ET Datasheet DownloadOfficial datasheet from Nexperia
What are equivalent replacements for PDTC123ET?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What built-in resistor values does the PDTC123ET include, and how do they simplify driving it from a 3.3 V MCU GPIO?
The PDTC123ET integrates a 2.2 kΩ base resistor and a 2.2 kΩ base-emitter resistor (R1:R2 ratio of 1). When driven from a 3.3 V GPIO, the base current is approximately (3.3 V - 0.7 V) / 2.2 kΩ = 1.18 mA, with sufficient hFE of 30 to saturate the transistor at collector currents up to approximately 35 mA, covering most LED and optocoupler switching needs without any additional discrete components.
For a small relay coil switching application at 50 mA, how does PDTC123ET's 100 mA rating provide headroom?
With a 100 mA maximum collector current rating and 50 V VCEo, the PDTC123ET provides a 2x current safety margin over a 50 mA relay coil load. The 50 V breakdown voltage also safely handles coil flyback spikes when used with an external flyback diode, making it a reliable choice for 5 V and 12 V relay switching applications in industrial and consumer equipment.
How does the SOT-23 package of the PDTC123ET compare to using a discrete NPN transistor plus two resistors on a PCB?
Replacing a discrete NPN in SOT-23 plus two 0402 resistors with the PDTC123ET consolidates 3 components into 1 SOT-23 package. This reduces BOM line items by 2, saves approximately 2 mm² of PCB area per switching stage, and eliminates the risk of incorrect resistor value selection. For designs with dozens of GPIO-driven switches, the PDTC123ET significantly reduces assembly complexity and placement time.
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Why Buy from FindMyChip
About Nexperia
Nexperia is a leading electronic component manufacturer. FindMyChip sources Nexperia ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 3360+ | $0.0596 | $200.26 |
| 4360+ | $0.0574 | $250.26 |
| 5445+ | $0.0551 | $300.02 |
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