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Diodes Incorporated DZT955-13
- Part No.:
- DZT955-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
DZT955-13.pdf
- Description:
- TRANS PNP 140V 4A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,323
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Product details
Overview
DZT955-13 from Diodes Incorporated is a PNP epitaxial planar silicon transistor in SOT-223 package, rated for -140 V VCEO, -4 A continuous collector current, and low -150 mV VCE(SAT) at IC = -1 A / IB = -100 mA. It serves as a medium-power switching or linear amplification device in industrial power supplies and motor control circuits.
For engineers reviewing the DZT955-13 datasheet, DZT955-13 pinout, DZT955-13 application, or DZT955-13 equivalent, key selection criteria include its low saturation voltage, high breakdown rating, thermal resistance of 125 °C/W on FR-4, and RoHS-compliant matte tin plating over copper leadframe.
Technical Context
This PNP bipolar junction transistor uses epitaxial planar die construction to ensure stable gain and low leakage across temperature. Its VCEO = -140 V and VCBO = -180 V support high-voltage DC bus switching, while hFE = 75–300 (IC = -10 mA to -10 A) enables robust current amplification in both linear and saturated modes.
Switching performance is characterized by ton = 85 ns and toff = 430 ns under IC = -1 A, VCC = -50 V conditions, with fT = 150 MHz confirming suitability for medium-frequency switching applications up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -140 V - Maximum safe collector-emitter voltage before avalanche breakdown in common-emitter configuration. |
| IC (continuous) | -4 A - Continuous DC collector current capability at TA = 25°C with derating above 25°C per Fig. 1. |
| VCE(SAT) | -150 mV @ IC = -1 A, IB = -100 mA - Low conduction loss enabling efficient medium-power switching. |
| hFE | 75–300 - DC current gain range supporting reliable base drive design across load currents from 10 mA to 10 A. |
| RθJA | 125 °C/W - Thermal resistance from junction to ambient on standard FR-4 PCB, defining heatsinking requirements. |
| fT | 150 MHz - Current gain-bandwidth product indicating usable frequency limit for small-signal amplification. |
| toff | 430 ns - Turn-off delay time critical for PWM duty cycle fidelity in switching regulators and motor drivers. |
Pinout & Package
Package: SOT-223, surface-mount, 4-terminal plastic case with exposed collector tab (pin 3 and 4 internally connected). Moisture sensitivity level 1 per J-STD-020C; matte tin-plated copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires negative bias relative to emitter to forward-bias BE junction and enable conduction. |
| 2 | Emitter | Current source terminal; connects to higher potential node in PNP switching configurations. |
| 3 & 4 | Collector | Power output terminal; pins 3 and 4 are internally shorted and thermally connected to exposed metal tab for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(SAT) | -150 mV at IC = -1 A reduces conduction losses and improves efficiency in switching applications. |
| High VCEO rating | -140 V supports use in 100 V DC bus systems without derating, e.g., industrial SMPS and solenoid drivers. |
| SOT-223 thermal performance | Exposed collector tab enables direct PCB copper pour attachment, improving thermal management over SOT-23/SOT-89. |
| RoHS-compliant plating | Matte tin annealed over copper leadframe ensures solderability per MIL-STD-202, Method 208 and eliminates lead contamination risk. |
Applications
| Industrial Power Supply | Motor Driver Stage |
|---|---|
Use Scenario: High-side switch in 48 V input DC-DC converters delivering up to 3 A output. IC Role / Device Role / Timing Role: PNP medium-power switch controlling primary-side current flow during PWM cycles. Use Value: Low -150 mV VCE(SAT) minimizes I²R losses at full load, reducing thermal stress on PCB layout. | Use Scenario: H-bridge upper-leg driver for brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: High-side current sink enabling bidirectional control with complementary NPN/N-channel devices. Use Value: -140 V VCEO withstands inductive kickback spikes up to ±120 V without clamping diodes. |
| LED Constant-Current Driver | Relay/Solenoid Interface |
Use Scenario: Linear current regulator for high-brightness LED strings in signage and lighting fixtures. IC Role / Device Role / Timing Role: Series-pass element operating in active region with feedback-controlled base current. Use Value: hFE ≥ 75 at IC = -3 A ensures stable regulation across temperature and unit-to-unit variation. | Use Scenario: 24 V/48 V solenoid actuator interface in HVAC control panels and fluid valves. IC Role / Device Role / Timing Role: On/off switch driving inductive loads with flyback energy absorption via external diode. Use Value: 125 °C/W RθJA allows operation at 75°C ambient without heatsink when pulsed at ≤50% duty cycle. |
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 |
|---|---|---|---|
| ZTX951 | VCEO = -120 V, VCE(SAT) = -200 mV @ IC = -1 A, SOT-89 package | Lower voltage rating and higher saturation voltage; smaller thermal mass | Select when board space is constrained and 120 V max bus voltage suffices. |
| MJD955 | VCEO = -140 V, IC = -5 A, TO-252 package, RθJA = 62.5 °C/W | Higher current rating and superior thermal performance but larger footprint | Select when >4 A peak current or lower junction temperature rise is required. |
Compared with ZTX951, DZT955-13 offers 20 V higher breakdown and 50 mV lower VCE(SAT); versus MJD955, it trades 1 A current headroom and 62.5 °C/W better thermal resistance for SOT-223 compactness and automated assembly compatibility.
Availability
DZT955-13 is available at Aetrix Electronics and suitable for industrial power supplies, motor control modules, and LED driver circuits requiring stable component supply, RoHS compliance, and SMT manufacturability.
Supply support for DZT955-13 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 DZT955 belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-effective, high-reliability medium-power switching and amplification in industrial and consumer power systems.
FAQ
What is the maximum allowable junction temperature for DZT955-13?
The DZT955-13 has an absolute maximum junction temperature of +150°C, with storage temperature also rated from -55°C to +150°C. Derating begins at 25°C ambient per the power dissipation curve in Fig. 1, where PD drops linearly to zero at +150°C ambient on FR-4 PCB.
Can DZT955-13 be used in linear amplifier configurations?
Yes - its hFE range of 75–300 across IC = -10 mA to -10 A and low VCE(SAT) support stable Class-A and Class-AB operation. However, thermal design must account for continuous power dissipation; RθJA = 125 °C/W requires adequate copper area or forced airflow above ~0.3 W.
Is the SOT-223 package pinout standardized across manufacturers?
Yes - the SOT-223 mechanical outline (per JEDEC MO-178) defines pin 1 as base, pin 2 as emitter, and pins 3 & 4 as collector (internally tied). Diodes' DZT955-13 follows this standard; no alternate pinouts exist for this part number.
Does DZT955-13 require a base resistor in switching applications?
Yes - a series base resistor is mandatory to limit IB and ensure saturation. For IC = -1 A, minimum IB = -100 mA is required; with VBE(SAT) ≈ -1.11 V, a 33 Ω resistor is typical when driven from a 5 V logic source referenced to emitter potential.
DZT955-13 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):
- 4 A
- Voltage - Collector Emitter Breakdown (Max):
- 140 V
- Vce Saturation (Max) @ Ib, Ic:
- 370mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1A, 5V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
DZT955-13 FAQ
1.How can I place an order for DZT955-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DZT955-13 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 DZT955-13 reliable?
The price and inventory of DZT955-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZT955-13 is usually 5 days.
3.What payment methods are accepted for DZT955-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZT955-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DZT955-13?
DZT955-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DZT955-13 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 DZT955-13?
For technical support, including DZT955-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZT955-13 requirements.
6.How does Aetrix verify that DZT955-13 is sourced from the original manufacturer or authorized distributors?
All DZT955-13 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 DZT955-13 meets industry standards.
7.What is the process for return or replacement of DZT955-13?
All DZT955-13 units undergo pre-shipment inspection (PSI). If there is an issue with DZT955-13, 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 DZT955-13 part is unused and in its original packaging.
Return procedure for DZT955-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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