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Nexperia USA Inc. PDTC124EU/ZLF
- Part No.:
- PDTC124EU/ZLF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
PDTC124EU/ZLF.pdf
- Description:
- TRANS PREBIAS
- Quantity:
- Payment:
- Shipping:
Inventory:3,576
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Product details
Overview
PDTC124EU from Nexperia is an NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, rated for 50 V VCEO, 100 mA output current, with integrated R1 = 22 kΩ and R2 = 22 kΩ bias resistors. It functions as a single-chip digital switch for IC input control and load switching in industrial digital circuits.
For engineers reviewing the PDTC124EU datasheet, PDTC124EU pinout, PDTC124EU application, or PDTC124EU equivalent, this device serves as a space- and BOM-optimized replacement for discrete base-resistor + transistor combinations-especially where simplified PCB layout, reduced pick-and-place count, and guaranteed R2/R1 = 1.0 ratio are critical.
Technical Context
This RET integrates a monolithic NPN transistor with two precision laser-trimmed on-die resistors: R1 connected between input and base, R2 between base and emitter. Its fixed R2/R1 ratio of 1.0 (±20%) enables predictable saturation behavior under defined drive conditions.
The device operates as a digital switch with VI(on) = 1.7–2.5 V (at IC = 5 mA) and VI(off) = 0.8–1.1 V (at IC = 100 µA), supporting direct interfacing with 3.3 V and 5 V logic families without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V industrial bus switching with margin. |
| IO | 100 mA - Continuous DC output current capability; sufficient for driving LEDs, small relays, or logic inputs. |
| R1 | 22 kΩ ±30% - Input bias resistor; sets base current when driven from standard CMOS/TTL outputs. |
| R2/R1 | 1.0 ±0.2 - Fixed feedback-to-input resistor ratio; ensures stable turn-on/turn-off thresholds and reduces sensitivity to process variation. |
| VCE(sat) | 150 mV max at IC = 10 mA, IB = 0.5 mA - Low saturation voltage minimizes power loss and heating in switching mode. |
| fT | 230 MHz - Transition frequency of internal transistor; enables reliable operation up to ~10–20 MHz digital switching. |
| Ptot | 200 mW at Tamb ≤ 25 °C - Total power dissipation limit on FR4 PCB; derates linearly above 25 °C per 625 K/W thermal resistance. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, 3-terminal configuration with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base node) | Connected internally to R1; accepts logic-level drive signal; no external base connection required. |
| 2 | Ground (emitter) | Emitter terminal tied to system ground; R2 connects base to this pin; defines reference for input threshold. |
| 3 | Output (collector) | Switched high-side output node; sinks current from load to emitter (ground); compatible with open-collector logic interface. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 + R2 bias network | Eliminates need for two external resistors; reduces PCB area by ≥2.5 mm² and eliminates two placement steps. |
| Guaranteed R2/R1 = 1.0 ±20% | Ensures consistent current gain and switching thresholds across production lots-no binning or calibration needed. |
| 100 mA continuous output rating | Supports direct driving of optocoupler inputs, small solenoids, or LED strings without external amplification. |
| VCE(sat) ≤ 150 mV @ 10 mA | Reduces conduction loss to <1.5 mW at 10 mA, enabling thermally robust operation in dense layouts. |
| SC-70 footprint compatibility | Matches industry-standard SOT323 land pattern; enables drop-in replacement for BC847-based designs with no layout change. |
Applications
| Industrial Digital Control | Logic-Level Interface Translation |
|---|---|
|
Use Scenario: Controlling PLC input modules or microcontroller GPIO lines in factory automation panels. IC Role / Device Role / Timing Role: Digital switch isolating 24 V field signals from 3.3 V/5 V logic domains. Use Value: Eliminates discrete resistor-transistor pair while maintaining noise immunity via built-in R2 feedback path. |
Use Scenario: Level-shifting between mixed-voltage subsystems (e.g., 5 V MCU controlling 3.3 V sensor enable lines). IC Role / Device Role / Timing Role: Active-low enable switch with VI(on) = 1.7–2.5 V and VI(off) = 0.8–1.1 V. Use Value: Guaranteed turn-on at 2.5 V ensures compatibility with TTL and LVTTL outputs without pull-up dependencies. |
| LED Driver for Status Indication | Low-Power Load Switching |
|
Use Scenario: Driving panel-mounted status LEDs in medical or test equipment with strict BOM cost targets. IC Role / Device Role / Timing Role: Constant-current sink switch with 100 mA rating and <150 mV dropout. Use Value: Enables 20 mA LED drive with only one external current-limiting resistor-reducing component count by 33% vs. discrete solution. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., 5 V USB peripheral supply) in portable instrumentation. IC Role / Device Role / Timing Role: Low-leakage (ICEO ≤ 5 µA at 150 °C) switching element for standby-mode isolation. Use Value: Maintains <1 µA total quiescent current in off-state, meeting IEC 62368-1 energy efficiency requirements. |
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, SOT23 | Discrete NPN transistor requiring two external 22 kΩ resistors; no guaranteed R2/R1 match or temperature tracking. | Higher BOM count and placement cost; requires layout space for three components instead of one. | Select when existing design uses SOT23 footprint and board rework is prohibitive. |
| PDTA124EU | PNP complement with identical R1/R2 values and SC-70 package; VECO = 50 V, IO = −100 mA. | Used for high-side switching or inverted logic control; not interchangeable without circuit redesign. | Select for complementary high-side drive in push-pull or dual-rail configurations. |
Compared with BC847B + resistors, PDTC124EU reduces assembly steps and improves threshold consistency; compared with PDTA124EU, it provides non-inverting low-side switching with identical biasing architecture but opposite polarity.
Availability
PDTC124EU is available at Aetrix Electronics and suitable for industrial digital control, logic-level interface translation, and LED status indication requiring stable component supply and long-term manufacturability.
Supply support for PDTC124EU 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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for industrial, consumer, and automotive markets.
PDTC124EU belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered to replace discrete transistor-resistor combinations in cost-sensitive, space-constrained digital switching applications.
FAQ
What is the maximum operating temperature for PDTC124EU?
The PDTC124EU has a maximum junction temperature (Tj) of 150 °C and an ambient operating range of −65 °C to +150 °C. Its thermal resistance Rth(j-a) is 625 K/W on a standard FR4 PCB, meaning power dissipation must be derated above 25 °C ambient-e.g., to ~125 mW at 75 °C ambient.
Can PDTC124EU replace BC847 in existing designs?
Yes-PDTC124EU is a functional drop-in replacement for BC847-based digital switches when used with 22 kΩ base resistors, provided the PCB layout accommodates the smaller SOT323 footprint. No electrical redesign is needed, but the pinout differs: Pin 1 = input (not base), Pin 2 = emitter (not collector), Pin 3 = collector (not emitter).
Does PDTC124EU support 1.8 V logic drive?
No-VI(on) is specified from 1.7 V (typ) to 2.5 V (max) at IC = 5 mA, and VI(off) is 0.8–1.1 V. At 1.8 V drive, turn-on is marginal and highly temperature-dependent; reliable operation requires ≥2.5 V input for guaranteed saturation across −40 °C to +125 °C.
Is PDTC124EU automotive-qualified?
No-per Nexperia's 2023 revision history, PDTC124EU is explicitly designated as non-automotive qualified. It is not tested to AEC-Q101 or qualified for automotive applications. For automotive use, select the -Q qualified variant (e.g., PDTC124EU-Q) or consult Nexperia's automotive-grade RET portfolio.
PDTC124EU/ZLF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PDTC124EU/ZLF FAQ
1.How can I place an order for PDTC124EU/ZLF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC124EU/ZLF 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 PDTC124EU/ZLF reliable?
The price and inventory of PDTC124EU/ZLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC124EU/ZLF is usually 5 days.
3.What payment methods are accepted for PDTC124EU/ZLF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC124EU/ZLF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC124EU/ZLF?
PDTC124EU/ZLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC124EU/ZLF 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 PDTC124EU/ZLF?
For technical support, including PDTC124EU/ZLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC124EU/ZLF requirements.
6.How does Aetrix verify that PDTC124EU/ZLF is sourced from the original manufacturer or authorized distributors?
All PDTC124EU/ZLF 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 PDTC124EU/ZLF meets industry standards.
7.What is the process for return or replacement of PDTC124EU/ZLF?
All PDTC124EU/ZLF units undergo pre-shipment inspection (PSI). If there is an issue with PDTC124EU/ZLF, 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 PDTC124EU/ZLF part is unused and in its original packaging.
Return procedure for PDTC124EU/ZLF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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