PDTC123JU Nexperia Integrated Circuit (SOT23 (3-Pin)) In Stock
PDTC123JU is an NPN digital transistor from Nexperia with built-in 2.2 kΩ base bias resistor, rated at 100 mA collector current and 50 V collector-emitter voltage. It integrates a bias resistor ratio of 21 to eliminate external components in logic-level switching circuits. Available in a 3-pin UMT package with worldwide shipping.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTC123JU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Built-in 2.2 kΩ base bias resistor with a bias resistor ratio of 21 eliminating external base resistors and simplifying PCB layout for digital switching applications
- NPN configuration rated at 100 mA collector current and 50 V VCEO enabling direct switching of LEDs, relays, and solenoids from 3.3 V and 5 V logic outputs
- Minimum DC current gain (hFE) of 100 ensuring reliable saturation at low base drive currents from microcontroller GPIO pins with limited source current
- Ultra-compact 3-pin UMT package occupying less than 0.5 mm² PCB footprint for high-density LED driver arrays and portable consumer electronics
Applications
The PDTC123JU is used as a direct logic-level interface transistor in LED lighting drivers, relay drivers, and motor switching circuits where a microcontroller GPIO output must switch loads up to 100 mA at voltages up to 50 V. Its integrated 2.2 kΩ base resistor eliminates the need for an external current-limiting resistor, reducing component count by 1 per switch stage in display driver arrays and indicator circuits. The UMT package also suits space-constrained wearable electronics and multi-channel switching matrices on high-density PCBs.
Specifications
| Date Of Intro | 1999-05-18 |
| YTEOL | 7 |
| Additional Feature | BUILT IN BIAS RESISTANCE RATIO IS 21 |
| Collector Current-Max (IC) | 0.1A |
| Collector-Emitter Voltage-Max | 50V |
| Configuration | SINGLE WITH BUILT-IN RESISTOR |
| DC Current Gain-Min (hFE) | 100 |
| 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 |
| Reference Standard | IEC-60134 |
| 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 | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the built-in 2.2 kΩ base resistor in the PDTC123JU simplify the circuit around a microcontroller output?
The integrated 2.2 kΩ base bias resistor limits the base current drawn from a 3.3 V GPIO to approximately 1.4 mA, which combined with the minimum hFE of 100 provides up to 140 mA collector saturation current without any external components. This removes one resistor per switch stage from the BOM, saving PCB space and reducing assembly cost in multi-channel LED or relay drive arrays.
What is the maximum collector current and voltage of the PDTC123JU, and which load types can it directly drive?
The PDTC123JU supports a maximum collector current of 100 mA and a collector-emitter voltage of 50 V, sufficient to drive standard 5 V and 12 V relays, single LEDs at up to 50 mA, and small solenoids on 24 V supply rails. For loads exceeding 100 mA, a Darlington pair or MOSFET driver stage would be needed in place of this transistor.
How does the bias resistor ratio of 21 in the PDTC123JU affect turn-on threshold from a 5 V logic signal?
The bias resistor ratio R1/R2 of 21 sets the input threshold voltage at approximately 1.5 V when driven from a 5 V source, ensuring the transistor remains firmly off for 3.3 V logic low signals (typically below 0.8 V) and fully saturated for logic high signals, giving clean switching behavior without undefined states in mixed-voltage digital interfaces.
How does the PDTC123JU 3-pin UMT package compare to SOT-23 for density-limited LED driver boards?
The UMT package occupies a PCB footprint of approximately 1.0 x 0.6 mm, roughly 40% smaller than the standard SOT-23 footprint at 1.3 x 2.4 mm. In a 16-channel LED indicator matrix, switching to UMT packages recovers over 50 mm² of board area, equivalent to mounting 10 additional passive components in the same circuit footprint.
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