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Nexperia USA Inc. PDTC144ET/DG/B2,21
- Part No.:
- PDTC144ET/DG/B2,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC144ET/DG/B2,21.pdf
- Description:
- TRANS PREBIAS NPN 50V TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,735
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Product details
Overview
PDTC144ET/DG/B2,21 from Nexperia is an NPN resistor-equipped transistor (RET) in SOT23 package, designed for digital switching applications with integrated 47 kΩ input and feedback bias resistors, 50 V VCEO, 100 mA output current capability, and AEC-Q101 qualification for automotive control circuits.
For engineers reviewing the PDTC144ET/DG/B2,21 datasheet, PDTC144ET/DG/B2,21 pinout, PDTC144ET/DG/B2,21 application, or PDTC144ET/DG/B2,21 equivalent, key selection criteria include built-in resistor ratio (R2/R1 = 1), low VCE(sat) (≤150 mV at IC = 10 mA), off-state input voltage (VI(off) = 1.2 V typ), and thermal resistance (Rth(j-a) = 500 K/W).
Technical Context
This RET integrates a matched NPN transistor with two precision bias resistors (R1 = R2 = 47 kΩ ±22%) to eliminate external components in digital interface and load-switching circuits. It operates as a single-stage saturated switch with fixed base drive configuration, eliminating need for external base resistor networks.
The device delivers predictable turn-on/turn-off behavior via VI(on) = 1.6 V (min) and VI(off) = 0.8 V (max) thresholds, enabling reliable logic-level interfacing with microcontrollers and gate drivers. Its AEC-Q101 qualification confirms suitability for automotive ambient temperature range (−40 °C to +150 °C) and mechanical stress requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V automotive bus switching with margin. |
| IO | 100 mA - Continuous output current rating; sufficient for driving LEDs, relays, and small solenoids. |
| R1 | 47 kΩ (typ) - Input bias resistor value; sets base current for defined saturation without external component. |
| R2/R1 | 1.0 (typ) - Unity feedback resistor ratio; ensures stable bias point and consistent hFE-independent operation. |
| VCE(sat) | 150 mV (max) at IC = 10 mA, IB = 0.5 mA - Low saturation voltage minimizes power loss in switching mode. |
| VI(on) | 1.6 V (min) at IC = 2 mA - Minimum input voltage required to reliably saturate the transistor. |
| VI(off) | 1.2 V (typ) at IC = 100 µA - Input voltage threshold below which device remains fully off. |
Pinout & Package
PDTC144ET/DG/B2,21 uses the SOT23 (TO-236AB) surface-mount plastic package: 3-lead, 1.9 mm × 1.1 mm × 1.2 mm body, standard footprint compatible with reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected internally to R1; accepts logic-level control signal directly from MCU GPIO or buffer output. |
| 2 | GND (emitter) | Emitter tied to ground reference; provides return path for load current and bias network. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., LED anode, relay coil) referenced to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | Eliminates two external resistors, reducing BOM count and PCB area in digital interface designs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing. |
| Low VCE(sat) | 150 mV max enables <15 mW conduction loss at 100 mA, improving thermal efficiency in space-constrained modules. |
| Fixed R2/R1 = 1 ratio | Ensures stable DC operating point across process and temperature variations without tuning. |
| SOT23 package compatibility | Standard footprint supports automated pick-and-place and reflow assembly; no wave soldering recommended. |
Applications
| Automotive Door Module Control | Industrial PLC Digital Output |
|---|---|
Use Scenario: Driving window lift motor enable signals and mirror fold/unfold relays in door control units. IC Role / Device Role / Timing Role: NPN RET acts as level-shifted, current-amplified switch translating 3.3 V/5 V MCU outputs to 12 V/24 V loads. Use Value: Built-in resistors reduce component count by two per channel, lowering assembly cost and increasing channel density on compact door ECUs. |
Use Scenario: Isolating and amplifying programmable logic controller (PLC) output signals to drive 24 V solenoid valves and indicator lamps. IC Role / Device Role / Timing Role: Digital switching element providing galvanically isolated, low-latency on/off control with minimal external support. Use Value: 100 mA output rating and 50 V VCEO allow direct interface with industrial 24 V DC control rails without additional protection circuitry. |
| Consumer Appliance UI Backlight | Medical Infusion Pump Status Indicator |
Use Scenario: Controlling segmented LED backlight arrays in smart appliance touch panels and display bezels. IC Role / Device Role / Timing Role: Constant-current switch regulating individual LED segments via PWM-compatible base drive. Use Value: VI(on)/VI(off) thresholds ensure clean logic transitions at 3.3 V MCU levels, preventing partial turn-on and flicker in dimmed states. |
Use Scenario: Driving status LEDs and audible alarm indicators in battery-powered infusion pumps requiring long-term reliability. IC Role / Device Role / Timing Role: Fail-safe digital output stage ensuring visual/audible alerts activate only when commanded by safety-critical firmware. Use Value: AEC-Q101 qualification and 150 °C Tj rating support extended operation in sealed, thermally insulated medical enclosures. |
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,215 | Discrete NPN BJT without integrated resistors; requires external RB and RBE network. | Higher BOM count and layout complexity; suitable where bias flexibility or higher hFE (>200) is needed. | Select when precise base current tuning or variable gain is required; not drop-in compatible. |
| PDTA144ET,215 | PNP complement with identical R1/R2 values and SOT23 package; VECO = 50 V, IO = −100 mA. | Used for high-side switching or complementary logic stages; polarity reversal changes load connection topology. | Choose for PNP-based load configurations or push-pull driver pairs; shares footprint but not functional equivalence. |
Compared with BC847B,215, PDTC144ET/DG/B2,21 reduces design cycle time and test validation effort by embedding biasing; versus PDTA144ET,215, it enables low-side switching with simplified grounding and common-emitter signal inversion.
Availability
PDTC144ET/DG/B2,21 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, consumer appliance user interfaces, and medical device status indication requiring stable component supply and AEC-Q101 compliance.
Supply support for PDTC144ET/DG/B2,21 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 efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
PDTC144ET/DG/B2,21 belongs to the PDTC144E series of resistor-equipped transistors, engineered specifically to replace discrete BJT + resistor combinations in digital switching applications while meeting stringent automotive reliability standards.
FAQ
What is the maximum continuous collector current for PDTC144ET/DG/B2,21?
The maximum continuous collector current (IO) is 100 mA under normal operating conditions, verified per IEC 60134 limiting values. This rating applies at Tamb ≤ 25 °C with FR4 PCB mounting and standard SOT23 footprint. Derating is required above 25 °C per the 500 K/W thermal resistance curve.
Can PDTC144ET/DG/B2,21 be used with 3.3 V microcontroller GPIOs?
Yes - its VI(on) minimum of 1.6 V and VI(off) typical of 1.2 V ensure robust turn-on with 3.3 V logic, while maintaining full cutoff at 0 V. The integrated bias network eliminates external resistor calculation, enabling direct connection to most 3.3 V and 5 V MCU outputs without level-shifting.
Is wave soldering permitted for PDTC144ET/DG/B2,21?
No - Nexperia explicitly specifies reflow soldering as the only recommended method. Wave soldering is not qualified and may cause thermal damage due to the SOT23 package's sensitivity and internal resistor tolerances. Reflow profiles must follow JEDEC J-STD-020 guidelines for moisture sensitivity level (MSL) 1.
How does the R2/R1 ratio affect switching performance?
The R2/R1 ratio of 1.0 (±0.2) ensures symmetric feedback that stabilizes the base-emitter junction voltage during saturation, minimizing variation in VCE(sat) and propagation delay across temperature and process corners. This fixed ratio eliminates gain dependency, making switching behavior predictable without hFE characterization.
PDTC144ET/DG/B2,21 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:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 10 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- 230 MHz
- Power - Max:
- 250 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PDTC144ET/DG/B2,21 FAQ
1.How can I place an order for PDTC144ET/DG/B2,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC144ET/DG/B2,21 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 PDTC144ET/DG/B2,21 reliable?
The price and inventory of PDTC144ET/DG/B2,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC144ET/DG/B2,21 is usually 5 days.
3.What payment methods are accepted for PDTC144ET/DG/B2,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC144ET/DG/B2,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC144ET/DG/B2,21?
PDTC144ET/DG/B2,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC144ET/DG/B2,21 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 PDTC144ET/DG/B2,21?
For technical support, including PDTC144ET/DG/B2,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC144ET/DG/B2,21 requirements.
6.How does Aetrix verify that PDTC144ET/DG/B2,21 is sourced from the original manufacturer or authorized distributors?
All PDTC144ET/DG/B2,21 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 PDTC144ET/DG/B2,21 meets industry standards.
7.What is the process for return or replacement of PDTC144ET/DG/B2,21?
All PDTC144ET/DG/B2,21 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC144ET/DG/B2,21, 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 PDTC144ET/DG/B2,21 part is unused and in its original packaging.
Return procedure for PDTC144ET/DG/B2,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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