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Nexperia USA Inc. PDTC123TT,215
- Part No.:
- PDTC123TT,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC123TT,215.pdf
- Description:
- TRANS PREBIAS NPN 50V TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,798
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Product details
Overview
PDTC123TT from Nexperia is an NPN resistor-equipped transistor (RET) in SOT23 package, designed for digital switching applications with built-in 2.2 kΩ base bias resistor (R1), 50 V VCEO, 100 mA output current capability, and emitter-grounded configuration. It replaces discrete BJT + resistor combinations in IC input control and low-power load switching circuits.
For engineers reviewing the PDTC123TT datasheet, PDTC123TT pinout, PDTC123TT application, or PDTC123TT equivalent, this device serves as a cost-optimized, space-saving alternative to BC847-based digital interface designs requiring guaranteed turn-on behavior and reduced component count.
Technical Context
The PDTC123TT integrates a single NPN silicon transistor with one internal 2.2 kΩ base resistor (R1); R2 is open, confirming single-bias-resistor topology. Its fixed bias network eliminates external resistor placement while maintaining DC current gain (hFE ≥30 at IC = 20 mA, VCE = 5 V) and low saturation voltage (VCE(sat) ≤150 mV at IC = 10 mA, IB = 0.5 mA).
Designed for surface-mount digital logic interfacing, it operates across −65 °C to +150 °C ambient range, supports reflow soldering only, and delivers 250 mW total power dissipation at Tamb ≤25 °C in SOT23 package with thermal resistance Rth(j-a) = 500 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V and lower logic-level switching rails. |
| IO | 100 mA - Continuous output current rating; sufficient for driving LEDs, small relays, and logic inputs. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ) - Integrated base bias resistor; sets predictable base current without external components. |
| VCE(sat) | ≤150 mV at IC=10 mA, IB=0.5 mA - Ensures minimal conduction loss and compatible TTL/CMOS logic low-level recognition. |
| hFE | ≥30 at VCE=5 V, IC=20 mA - Guarantees reliable saturation under standard digital drive conditions. |
| Ptot | 250 mW at Tamb ≤25 °C - Defines maximum steady-state power handling in SOT23 footprint on FR4 PCB. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, 1.3 mm × 2.9 mm × 1.0 mm body; standard footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected internally to R1; accepts logic-level drive signal directly from MCU GPIO or gate output. |
| 2 | GND (emitter) | Common reference node; ties to system ground, enabling low-side switch configuration. |
| 3 | Output (collector) | Switched high-side node; connects to load (e.g., LED anode, relay coil) referenced to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistor R1 | 2.2 kΩ ±28% tolerance ensures consistent base current across production lots without layout dependency. |
| Reduced component count | Replaces two discrete parts (BC847 + 2.2 kΩ resistor), cutting BOM line items and assembly steps. |
| 100 mA output capability | Supports direct drive of common indicator LEDs, small solenoids, and logic-level translators without buffer stages. |
| SOT23 footprint compatibility | Matches industry-standard 3-pin SMT land pattern; enables drop-in replacement in existing layouts using BC847B/SOT23 footprints. |
Applications
| LED Indicator Control | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving status LEDs on embedded control panels with 3.3 V or 5 V microcontrollers. IC Role / Device Role / Timing Role: Low-side switch that sinks current from LED anode to ground when enabled. Use Value: Eliminates need for external base resistor, reducing PCB area by 1.5 mm² and eliminating resistor placement error risk. |
Use Scenario: Level-shifting and current amplification between 1.8 V/3.3 V MCU outputs and 5 V peripheral enable lines. IC Role / Device Role / Timing Role: Digital buffer with guaranteed saturation and fast turn-on/turn-off due to fixed R1 bias. Use Value: Provides deterministic switching thresholds and eliminates resistor value drift effects on timing margins. |
| Relay Driver Circuit | Logic Input Protection |
Use Scenario: Controlling 5 V/12 V signal relays in industrial I/O modules where space and reliability are critical. IC Role / Device Role / Timing Role: High-gain saturated switch delivering up to 100 mA to relay coils with <150 mV dropout. Use Value: Reduces coil energization time by minimizing base charging delay and avoids resistor thermal derating concerns. |
Use Scenario: Protecting sensitive logic inputs (e.g., reset, interrupt pins) from overvoltage or ESD transients via clamping diodes and series limiting. IC Role / Device Role / Timing Role: Current-limiting active pull-down element that shunts excess current to ground during fault events. Use Value: Integrates current-limiting function into single device, avoiding separate resistor placement near vulnerable input traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847B,115 | Discrete NPN BJT; requires external 2.2 kΩ base resistor; hFE = 200–450 (wider spread); no integrated R1. | Higher gain variability affects saturation consistency; needs additional passive component and layout area. | Select when precise hFE-dependent analog operation is required or when RET architecture is not permitted. |
| PDTA123TT,215 | PNP complement; same SOT23 package, identical R1 = 2.2 kΩ, but emitter-connected to VCC and collector to load. | Used for high-side switching instead of low-side; incompatible pinout (pin 1 = emitter, pin 2 = collector, pin 3 = base). | Select for sourcing loads from positive rail where ground-referenced switching is impractical or violates system grounding rules. |
Compared with BC847B and PDTA123TT, PDTC123TT uniquely combines guaranteed low-side switching behavior, fixed bias accuracy, and SOT23 footprint compatibility-making it optimal for cost-sensitive, high-volume digital interface designs where layout simplicity and production yield are prioritized.
Availability
PDTC123TT is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO interfacing, and relay driver circuits requiring stable component supply and long-term manufacturability.
Supply support for PDTC123TT 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
Nexperia is a global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer applications.
PDTC123TT belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to simplify digital switching circuits by integrating bias resistors and reducing bill-of-materials complexity.
FAQ
What is the pin configuration of PDTC123TT in SOT23 package?
Pin 1 is the base input connected to the internal 2.2 kΩ resistor, Pin 2 is the emitter (ground terminal), and Pin 3 is the collector output. This configuration supports low-side switching topologies and matches standard SOT23 layout patterns used for BC847-series transistors.
Can PDTC123TT replace BC847 in existing designs without layout changes?
Yes, PDTC123TT uses the same SOT23 (TO-236AB) package and pinout as BC847B, allowing direct PCB footprint reuse. However, the integrated R1 means the external base resistor must be removed from the schematic and layout to avoid double-biasing and potential overdrive.
What is the maximum operating temperature for continuous use?
The PDTC123TT has a junction temperature limit of 150 °C and specified operation from −65 °C to +150 °C ambient. At Tamb = 85 °C, derated power dissipation is approximately 125 mW based on its 500 K/W thermal resistance and 250 mW rating at 25 °C.
Is reflow soldering the only recommended assembly method?
Yes, the datasheet explicitly states reflow soldering is the only recommended method. Wave soldering or hand soldering may exceed thermal limits or cause mechanical stress due to the SOT23 package construction and internal resistor integration.
PDTC123TT,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 20mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PDTC123TT,215 FAQ
1.How can I place an order for PDTC123TT,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC123TT,215 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 PDTC123TT,215 reliable?
The price and inventory of PDTC123TT,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC123TT,215 is usually 5 days.
3.What payment methods are accepted for PDTC123TT,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC123TT,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC123TT,215?
PDTC123TT,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC123TT,215 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 PDTC123TT,215?
For technical support, including PDTC123TT,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC123TT,215 requirements.
6.How does Aetrix verify that PDTC123TT,215 is sourced from the original manufacturer or authorized distributors?
All PDTC123TT,215 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 PDTC123TT,215 meets industry standards.
7.What is the process for return or replacement of PDTC123TT,215?
All PDTC123TT,215 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC123TT,215, 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 PDTC123TT,215 part is unused and in its original packaging.
Return procedure for PDTC123TT,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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