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Diodes Incorporated DCP51-13
- Part No.:
- DCP51-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
DCP51-13.pdf
- Description:
- TRANS PNP 45V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,183
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Product details
Overview
DCP51-13 from Diodes Incorporated is a PNP epitaxial planar silicon transistor in SOT-223 package, rated for -45 V VCEO, -1 A continuous collector current, and 1 W power dissipation at TA = 25°C. It serves as a medium-power switching or linear amplification device in industrial power supplies and motor control stages.
For engineers reviewing the DCP51-13 datasheet, DCP51-13 pinout, DCP51-13 application, or DCP51-13 equivalent, key selection criteria include its -45 V breakdown ratings, hFE range of 40–250 at IC = -150 mA, VCE(SAT) ≤ -0.5 V at IC = -500 mA/IB = -50 mA, and thermal resistance RθJA = 125 °C/W on FR-4 PCB.
Technical Context
This PNP bipolar junction transistor uses epitaxial planar die construction for stable gain and low leakage. Its complementary NPN counterpart is DCP54, enabling push-pull configurations. The device operates across -55°C to +150°C with lead-free, RoHS-compliant matte tin plating over copper leadframe.
Electrical behavior is characterized under pulsed conditions (300 μs, ≤2% duty cycle) for safe operating area validation. Transition frequency fT reaches 200 MHz at IC = -50 mA, VCE = -5 V, supporting high-speed switching up to ~100 kHz in hard-switched applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -45 V - Maximum allowable collector-emitter voltage before avalanche breakdown |
| IC (cont.) | -1 A - Continuous DC collector current rating at TA = 25°C |
| PD | 1 W - Power dissipation limit on standard FR-4 PCB per Diodes AP02001 layout |
| hFE | 40–250 - DC current gain range at IC = -150 mA, VCE = -2 V, defining base drive sizing |
| VCE(SAT) | ≤ -0.5 V - Saturation voltage at IC = -500 mA / IB = -50 mA, determining conduction loss |
| fT | 200 MHz - Transition frequency indicating usable bandwidth for small-signal amplification |
| RθJA | 125 °C/W - Junction-to-ambient thermal resistance, critical for heatsink-less operation up to ~75°C ambient |
Pinout & Package
Package: SOT-223 - Surface-mount plastic package with exposed thermal pad (pin 2 and 4 internally connected to collector), rated UL 94V-0, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Main current exit path; connects to load return or ground reference in high-side switch |
| 2 (Collector) | C | Main current entry point; electrically tied to pin 4 for enhanced thermal conduction |
| 3 (Base) | B | Control terminal requiring negative bias relative to emitter to turn on |
| 4 (Collector) | C | Secondary collector connection; used for mechanical stability and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die construction | Enables tight parameter distribution and low leakage (ICBO ≤ -100 nA at VCB = -30 V) |
| SOT-223 thermal pad design | Supports 1 W dissipation without external heatsink when mounted per AP02001 layout |
| Lead-free/RoHS-compliant plating | Matte tin annealed over copper leadframe ensures MIL-STD-202 solderability and long-term reliability |
| Complementary NPN pairing | DCP54 enables matched push-pull or differential amplifier designs with identical thermal and gain profiles |
Applications
| Industrial Power Supply | DC Motor Driver Stage |
|---|---|
Use Scenario: Regulated 12 V/24 V output stage in offline SMPS auxiliary supplies. IC Role / Device Role / Timing Role: Medium-power PNP switch controlling base of pass transistor or driving optocoupler LED. Use Value: -45 V rating accommodates reflected flyback spikes; VCE(SAT) ≤ -0.5 V minimizes dropout and heat generation at 500 mA loads. | Use Scenario: Directional H-bridge half-bridge driver for 12 V brushed DC motors in HVAC actuators. IC Role / Device Role / Timing Role: High-side PNP switch enabling bidirectional current control with logic-level base drive. Use Value: hFE ≥ 40 at IC = -500 mA ensures reliable saturation with ≤10 mA base current, reducing MCU GPIO loading. |
| LED Constant-Current Sink | Linear Voltage Regulator Pass Element |
Use Scenario: Fixed-current sink for high-brightness indicator LEDs in panel meters. IC Role / Device Role / Timing Role: Current-regulating PNP transistor biased by precision shunt reference. Use Value: Tight hFE spread (40–250) allows predictable current setting via emitter resistor; low VBE(ON) ≈ -1.0 V simplifies bias network design. | Use Scenario: Pass element in low-noise 5 V/3.3 V linear regulators for analog sensor front-ends. IC Role / Device Role / Timing Role: Series-pass PNP transistor delivering stable output under variable load. Use Value: RθJA = 125 °C/W permits operation up to 75°C ambient without heatsink at 300 mW dissipation, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCP51 | Same SOT-223 package; VCEO = -45 V, IC = -1 A, but hFE min = 25 (vs. 40 for DCP51-13) | Lower minimum gain requires higher base drive current in saturated switching | Acceptable where base drive margin exists; verify VCE(SAT) at target IC/IB |
| BCP51-16 | Identical electrical specs to BCP51 but with tighter hFE binning (100–250); same RoHS compliance | Improved gain consistency reduces calibration effort in production test | Preferred for volume manufacturing where hFE matching matters more than cost |
Compared with DCP51-13, BCP51 offers lower minimum hFE and looser gain tolerance, while BCP51-16 provides tighter hFE binning at no package or voltage trade-off-making it a drop-in upgrade for gain-critical linear applications.
Availability
DCP51-13 is available at Aetrix Electronics and suitable for industrial power supplies, DC motor drivers, LED current sinks, and linear voltage regulator pass elements requiring stable component supply and long-lifecycle support.
Supply support for DCP51-13 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 and manufacturing operations across Asia and the Americas.
The DCP51 series belongs to Diodes' general-purpose bipolar transistor product line, engineered for robust medium-power switching and amplification in cost-sensitive industrial and consumer systems.
FAQ
Is DCP51-13 pin-compatible with DCP51-16?
Yes-both share identical SOT-223 pinout (E-B-C-C), same mechanical dimensions, and identical maximum ratings. The suffix "-13" denotes tape-and-reel packaging (2500 pcs/reel), while "-16" indicates a different gain bin; electrical performance is otherwise interchangeable in non-gain-critical circuits.
What is the thermal derating behavior above 25°C ambient?
Per Figure 1 in DS31196, power dissipation linearly decreases from 1 W at 25°C to zero at 150°C ambient. Derating slope is -8 mW/°C, meaning at 75°C ambient, max allowable PD is 0.6 W-requiring either reduced IC or improved board copper area per AP02001 guidelines.
Can DCP51-13 be used in linear amplifier configurations?
Yes-its fT = 200 MHz and hFE stability across IC support audio-frequency and low-MHz small-signal amplification. However, VCE(SAT) and thermal resistance limit use to Class-A stages below 300 mW output; bias networks must ensure VBE remains within -1.0 V typical.
Why is DCP51-13 marked "Not Recommended for New Design"?
Diodes issued this notice because newer alternatives like BCP51-16 offer tighter hFE binning and updated process control, though DCP51-13 remains fully functional and supported. No obsolescence or quality issues exist-the designation reflects roadmap alignment, not failure risk.
DCP51-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 150mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
DCP51-13 FAQ
1.How can I place an order for DCP51-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DCP51-13 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 DCP51-13 reliable?
The price and inventory of DCP51-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DCP51-13 is usually 5 days.
3.What payment methods are accepted for DCP51-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCP51-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCP51-13?
DCP51-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCP51-13 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 DCP51-13?
For technical support, including DCP51-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCP51-13 requirements.
6.How does Aetrix verify that DCP51-13 is sourced from the original manufacturer or authorized distributors?
All DCP51-13 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 DCP51-13 meets industry standards.
7.What is the process for return or replacement of DCP51-13?
All DCP51-13 units undergo pre-shipment inspection (PSI). If there is an issue with DCP51-13, 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 DCP51-13 part is unused and in its original packaging.
Return procedure for DCP51-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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