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Diodes Incorporated DDTB142TC-7-F
- Part No.:
- DDTB142TC-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTB142TC-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
DDTB142TC-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT-23 package, featuring integrated 470 Ω base-emitter (R1) and open-circuit base-collector (R2) bias resistors, −500 mA continuous collector current rating, −40 V VCEO, and −5 V VEBO. It serves as a compact, logic-compatible switch in low-voltage automotive signal conditioning and industrial I/O interface circuits.
For engineers reviewing the DDTB142TC-7-F datasheet, DDTB142TC-7-F pinout, DDTB142TC-7-F application, or DDTB142TC-7-F equivalent, key selection criteria include verified hFE range (100–600 at IC = −5 mA), guaranteed VCE(sat) ≤ −0.3 V at IC = −50 mA/IB = −2.5 mA, thermal resistance (625 °C/W), and AEC-Q101 qualification eligibility for automotive use cases.
Technical Context
This device implements a single PNP bipolar junction transistor with monolithically integrated base biasing network-R1 connected between emitter and base, R2 omitted (open)-enabling direct TTL/CMOS-level drive without external resistors. Its −5 V VEBO rating supports safe operation with negative input transients common in 5 V rail-sensing applications.
The SOT-23 package delivers 200 mW power dissipation under standard FR4 mounting, with fT = 200 MHz enabling reliable switching up to ~10 MHz in digital logic interfaces. DC current gain (hFE) is specified across IC = −1 mA to −50 mA, supporting both small-signal amplification and saturated switching roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −40 V - Ensures safe operation with 24 V automotive supply rails plus transient spikes. |
| IC (max) | −500 mA - Supports driving medium-power loads like LED arrays or relay coils directly. |
| VCE(sat) | ≤ −0.3 V @ IC = −50 mA/IB = −2.5 mA - Minimizes conduction loss and self-heating in on-state. |
| hFE | 100–600 @ IC = −5 mA/VCE = −5 V - Enables predictable biasing across process variation. |
| R1 | 470 Ω - Sets base current for logic-level turn-on; eliminates need for external pull-up resistor. |
| PD | 200 mW @ TA = +25 °C - Defines maximum steady-state power handling on standard PCB layout. |
| RθJA | 625 °C/W - Indicates thermal derating slope: 0.32 mW/°C above +25 °C ambient. |
Pinout & Package
Package: SOT-23 (JEDEC TO-236AB), molded plastic case with UL 94V-0 flammability rating, moisture sensitivity level 1 per J-STD-020D, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for internal R1; connects to system ground or low-side return path. |
| 2 (Base) | Base terminal | Input control node; biased via internal R1 to emitter; no external R2 connection required. |
| 3 (Collector) | Collector terminal | Switched output node; sinks current from load connected to positive supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 470 Ω enables direct CMOS/TTL drive without external components, reducing BOM count and board area. |
| Open R2 configuration | No base-collector resistor simplifies design for emitter-follower or grounded-emitter switching topologies. |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities; supports PPAP documentation upon request for automotive programs. |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); fully RoHS 3 compliant (2015/863/EU). |
Applications
| Automotive Door Module I/O | Industrial PLC Digital Input |
|---|---|
Use Scenario: Level-shifting and transient protection for door lock actuator feedback signals in 12 V vehicle networks. IC Role / Device Role / Timing Role: PNP switch isolating microcontroller GPIO from noisy body-ground-referenced sensors. Use Value: −5 V VEBO withstands negative load-dump transients; 470 Ω R1 ensures clean turn-on with 3.3 V MCU outputs. |
Use Scenario: Converting 24 V field sensor inputs to 5 V logic levels in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Input stage translator providing galvanic isolation and voltage threshold adaptation. Use Value: −40 V VCEO accommodates industrial supply variations; hFE stability ensures consistent switching across temperature. |
| LED Driver for Status Indicators | Power Sequencing Control |
Use Scenario: Driving multiplexed panel LEDs in medical diagnostic equipment requiring low standby current. IC Role / Device Role / Timing Role: Low-leakage saturated switch enabling precise current control via series resistor. Use Value: −0.5 µA IEBO minimizes dark-current error; −0.3 V VCE(sat) reduces power loss in high-duty-cycle indicators. |
Use Scenario: Enabling/disabling auxiliary power rails during boot-up sequencing in telecom baseband modules. IC Role / Device Role / Timing Role: Enable gate for PMIC-controlled LDOs or DC-DC converters. Use Value: 200 MHz fT supports fast edge response for sub-microsecond enable timing; SOT-23 footprint saves space in dense power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTB142JC-7-F | R1 = 470 Ω, R2 = 10 kΩ (base-collector resistor present) | Suitable for base-bias stabilization in linear amplifier configurations; not ideal for simple switch mode. | Select when stable DC operating point is required over wide temperature ranges. |
| NSV142TCWT1G | Same R1/R2 values, but AEC-Q101 qualified and automotive-grade screening applied | Approved for production automotive ECUs; includes extended reliability testing and traceable lot data. | Choose for safety-critical automotive designs where PPAP and long-term supply continuity are mandatory. |
Compared with DDTB142TC-7-F, DDTB142JC-7-F adds R2 for bias stability at the cost of reduced switching speed, while NSV142TCWT1G provides identical electrical behavior with certified automotive qualification-making it a drop-in replacement only when AEC compliance is contractually required.
Availability
DDTB142TC-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC digital inputs, LED status indicators, and power sequencing control requiring stable component supply and RoHS-compliant sourcing.
Supply support for DDTB142TC-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the DDTB (LO-R1) C series of pre-biased transistors designed specifically for simplified, space-constrained switching in automotive and industrial control systems where reliability and lead-free compliance are critical.
FAQ
Is DDTB142TC-7-F still in active production?
No-DDTB142TC-7-F is marked obsolete in the official Diodes datasheet (DS30403 Rev. 7-4, June 2021). However, Aetrix Electronics maintains legacy inventory and offers lifecycle management support, including cross-reference assistance and last-time-buy coordination for ongoing production programs.
What does "R2 = OPEN" mean in the ordering table?
"R2 = OPEN" indicates the absence of an internal base-collector resistor. This configuration allows full control of base biasing through the emitter-connected R1 alone, making the device ideal for grounded-emitter switching applications where external base pull-down is unnecessary and switching speed is prioritized.
Can DDTB142TC-7-F replace a standard PNP transistor like MMBT3906?
Yes-but only when the circuit relies solely on emitter-based biasing. Unlike MMBT3906, DDTB142TC-7-F integrates R1 = 470 Ω, eliminating the need for an external base resistor. It cannot substitute in circuits requiring base-collector feedback or dual-resistor bias networks without schematic modification.
Does this part meet AEC-Q101 requirements?
DDTB142TC-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation upon request, but it is not formally AEC-Q101 qualified. For certified automotive use, Diodes recommends NSV142TCWT1G-a functionally identical part with full AEC-Q101 qualification and extended reliability testing.
DDTB142TC-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 470 Ohms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTB142TC-7-F FAQ
1.How can I place an order for DDTB142TC-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTB142TC-7-F 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 DDTB142TC-7-F reliable?
The price and inventory of DDTB142TC-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTB142TC-7-F is usually 5 days.
3.What payment methods are accepted for DDTB142TC-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTB142TC-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTB142TC-7-F?
DDTB142TC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTB142TC-7-F 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 DDTB142TC-7-F?
For technical support, including DDTB142TC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTB142TC-7-F requirements.
6.How does Aetrix verify that DDTB142TC-7-F is sourced from the original manufacturer or authorized distributors?
All DDTB142TC-7-F 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 DDTB142TC-7-F meets industry standards.
7.What is the process for return or replacement of DDTB142TC-7-F?
All DDTB142TC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTB142TC-7-F, 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 DDTB142TC-7-F part is unused and in its original packaging.
Return procedure for DDTB142TC-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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