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Nexperia USA Inc. PDTC144ET/DG/B4,21
- Part No.:
- PDTC144ET/DG/B4,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC144ET/DG/B4,21.pdf
- Description:
- TRANS PREBIAS NPN 50V TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,943
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Product details
Overview
PDTC144ET/DG/B4,21 from Nexperia is an NPN resistor-equipped transistor (RET) in SOT23 package, designed for digital switching applications with built-in bias resistors R1 = 47 kΩ and R2 = 47 kΩ, 50 V VCEO, 100 mA IO, and AEC-Q101 qualification for automotive use.
For engineers reviewing the PDTC144ET/DG/B4,21 datasheet, PDTC144ET/DG/B4,21 pinout, PDTC144ET/DG/B4,21 application, or PDTC144ET/DG/B4,21 equivalent, key selection criteria include input/output voltage thresholds (VI(on) = 1.6 V typ, VI(off) = 1.2 V typ), thermal resistance (Rth(j-a) = 500 K/W), and compatibility with BC847-series replacement in low-power digital control circuits.
Technical Context
This RET integrates a matched NPN transistor with two precision bias resistors (R1 = 47 kΩ, R2/R1 = 1.0 typ) to eliminate external base resistors, enabling direct logic-level drive from microcontrollers or gate outputs. It operates as a single-stage digital switch with defined on/off thresholds and fixed current gain (hFE ≥ 80 at IC = 5 mA).
The device supports reflow-only soldering per JEDEC J-STD-020, features 150 °C maximum junction temperature, and delivers stable performance across −65 °C to +150 °C ambient range - validated under AEC-Q101 stress testing for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive and industrial supply rails. |
| IO | 100 mA - Continuous output current capability; sufficient for driving LEDs, small relays, or logic inputs. |
| R1 | 47 kΩ ±22% - Integrated base input resistor; eliminates need for external pull-up/pull-down components. |
| VI(on) | 1.6 V typ - Minimum input voltage to reliably saturate transistor; compatible with 1.8 V/3.3 V CMOS logic families. |
| VI(off) | 1.2 V max - Maximum input voltage to ensure cutoff; provides noise margin against false triggering. |
| hFE | ≥80 - DC current gain at 5 mA collector current; ensures predictable saturation with low base drive current. |
| Rth(j-a) | 500 K/W - Junction-to-ambient thermal resistance on FR4 PCB; defines power derating above 25 °C ambient. |
Pinout & Package
PDTC144ET/DG/B4,21 uses the SOT23 (TO-236AB) plastic surface-mounted package: 3-pin, 1.9 mm × 1.1 mm × 1.2 mm body, standard footprint for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected internally to R1; accepts logic-level control signal directly without external resistor. |
| 2 | GND (emitter) | Emitter tied to ground reference; serves as common return path for load current and bias network. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., LED anode or relay coil) referenced to positive rail. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | R1 = 47 kΩ, R2 = 47 kΩ - Eliminates two external components, reducing BOM count and layout area. |
| AEC-Q101 qualified | Stress-tested per Automotive Electronics Council standards - certified for under-hood and infotainment applications. |
| Logic-compatible thresholds | VI(on) = 1.6 V typ, VI(off) = 1.2 V max - Ensures robust operation with 1.8 V and 3.3 V microcontroller GPIOs. |
| Low saturation voltage | VCE(sat) ≤ 150 mV at IC = 10 mA - Minimizes power loss and heat generation in switching mode. |
| Small-footprint SOT23 | 1.9 mm × 1.1 mm body - Enables high-density PCB layouts in space-constrained modules like ECUs and sensor nodes. |
Applications
| Automotive Door Module Control | Industrial PLC Input Conditioning |
|---|---|
|
Use Scenario: Switching window lift motor enable signals and mirror fold/unfold commands in door control units. IC Role / Device Role / Timing Role: Digital interface buffer between MCU GPIO and 12 V load drivers; provides level translation and current gain. Use Value: Reduces component count by replacing BC847 + two resistors, lowering assembly cost and improving reliability in vibration-prone environments. |
Use Scenario: Converting 24 V field sensor inputs to clean 3.3 V logic levels for FPGA or ARM-based controller inputs. IC Role / Device Role / Timing Role: Input stage translator and current limiter; clamps and conditions noisy industrial signals before digitization. Use Value: Built-in resistor ratio ensures consistent threshold behavior across temperature, eliminating calibration drift in harsh factory settings. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Sensor Interface |
|
Use Scenario: Enabling sequential power-up of display backlight, fan, and pump subsystems in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-power load switch controlling 5–12 V auxiliary rails; driven directly from appliance SoC GPIOs. Use Value: 100 mA rating and 150 mV VCE(sat) minimize self-heating during extended duty cycles, supporting Class II safety isolation requirements. |
Use Scenario: Isolating and conditioning analog sensor excitation signals (e.g., thermistor bias, pressure bridge drive) in portable diagnostic devices. IC Role / Device Role / Timing Role: Precision current source enable switch; gates excitation current only during active measurement windows. Use Value: Tight R1/R2 tolerance (0.8–1.2 ratio) ensures repeatable bias current accuracy, critical for <1% measurement linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN digital switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847B,215 | No integrated resistors; requires external RB and RBE; hFE = 200–450; VCEO = 45 V. | Higher gain but needs 2 extra passives; less suitable for ultra-low-BOM designs. | Choose when fine-tuned biasing or higher hFE is required; avoid if minimizing pick-and-place steps is critical. |
| PDTA144ET,215 | PNP complement; same R1/R2 values; VECO = 50 V; identical SOT23 package and marking. | Used for high-side switching or complementary logic stages; not interchangeable in NPN-configured circuits. | Select only for PNP topology needs; verify circuit polarity before substitution. |
Compared with BC847B,215, PDTC144ET/DG/B4,21 reduces bill-of-materials and layout complexity at the cost of fixed biasing; versus PDTA144ET,215, it provides complementary functionality rather than drop-in equivalence - requiring schematic-level redesign for polarity reversal.
Availability
PDTC144ET/DG/B4,21 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input modules, and medical sensor interface boards requiring stable component supply and AEC-Q101 compliance.
Supply support for PDTC144ET/DG/B4,21 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 and logic devices for automotive, industrial, and consumer markets.
PDTC144ET/DG/B4,21 belongs to the PDTC144E series of resistor-equipped transistors, engineered to simplify digital interface design in space- and cost-sensitive applications while meeting automotive-grade reliability standards.
FAQ
What is the maximum continuous collector current for PDTC144ET/DG/B4,21?
The maximum continuous output current (IO) is 100 mA under normal operating conditions, as specified in Table 2 (Quick Reference Data) and confirmed in Table 6 (Limiting Values). This rating applies at Tamb ≤ 25 °C with derating per the Ptot curve in Figure 1 - exceeding this current risks thermal overload unless board-level copper area or airflow is enhanced.
Can PDTC144ET/DG/B4,21 replace BC847 in existing designs without layout changes?
Yes, it fits the same SOT23 footprint and pinout (pin 1 = base, pin 2 = emitter, pin 3 = collector), but requires verification of bias network removal: the internal R1/R2 eliminate external resistors, so existing BC847 base resistors must be omitted to prevent double-biasing and unintended conduction.
Is PDTC144ET/DG/B4,21 suitable for 1.8 V logic interfaces?
Yes - its VI(on) is 1.6 V typical and VI(off) is 1.2 V maximum, providing 0.4 V noise margin at 1.8 V supply. This ensures reliable turn-on with modern low-voltage MCUs while avoiding false triggering from ground bounce or EMI.
Does PDTC144ET/DG/B4,21 support wave soldering?
No - the datasheet explicitly states "Reflow soldering is the only recommended soldering method" (Section 11). Wave soldering is not characterized or qualified for this device; using it may cause thermal damage due to mismatched thermal mass and unsupported thermal profiles.
PDTC144ET/DG/B4,21 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:
- Active
- 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/B4,21 FAQ
1.How can I place an order for PDTC144ET/DG/B4,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC144ET/DG/B4,21 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/B4,21 reliable?
The price and inventory of PDTC144ET/DG/B4,21 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/B4,21 is usually 5 days.
3.What payment methods are accepted for PDTC144ET/DG/B4,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC144ET/DG/B4,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC144ET/DG/B4,21?
PDTC144ET/DG/B4,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC144ET/DG/B4,21 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/B4,21?
For technical support, including PDTC144ET/DG/B4,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC144ET/DG/B4,21 requirements.
6.How does Aetrix verify that PDTC144ET/DG/B4,21 is sourced from the original manufacturer or authorized distributors?
All PDTC144ET/DG/B4,21 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/B4,21 meets industry standards.
7.What is the process for return or replacement of PDTC144ET/DG/B4,21?
All PDTC144ET/DG/B4,21 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC144ET/DG/B4,21, 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/B4,21 part is unused and in its original packaging.
Return procedure for PDTC144ET/DG/B4,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC144ET/DG/B4,21 Tags
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