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Diodes Incorporated ZDT1049TC
- Part No.:
- ZDT1049TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- SOT-223-8
- Datasheet:
-
ZDT1049TC.pdf
- Description:
- TRANS 2NPN DUAL 25V 5A SM8
- Quantity:
- Payment:
- Shipping:
Inventory:9,101
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Product details
Overview
ZDT1049TC from Diodes Incorporated is a dual NPN medium-power high-gain transistor in SM-8 (SOT-223-8) package, designed for high-current switching and amplification in compact power stages. It features VCEO = 25 V, IC = 5 A per transistor, hFE up to 1200 at IC = 20 A, and low VCE(sat) of 45 mV at IC = 0.5 A / IB = 10 mA - used in DC-DC converter output stages and motor driver half-bridges.
For engineers reviewing the ZDT1049TC datasheet, ZDT1049TC pinout, ZDT1049TC application, or ZDT1049TC equivalent, key selection criteria include dual-die thermal coupling behavior, pulsed ICM = 20 A rating, safe operating area (SOA) limits at +100°C, and hFE consistency across IC = 10 mA to 20 A.
Technical Context
This dual NPN device integrates two electrically isolated transistors sharing a common heatsink pad, enabling synchronous switching or current-sharing topologies without external paralleling. Its SOA is characterized up to 100 ms pulses at +100°C, with derated Ptot = 2.75 W when both dies operate simultaneously.
The device uses epitaxial planar technology with gold-doped base region for enhanced minority-carrier lifetime control, supporting fT = 180 MHz at IC = 50 mA / VCE = 10 V and fast switching (ton = 125 ns, toff = 380 ns) under IC = 4 A conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 25 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines maximum rail voltage in linear or switching applications. |
| IC (continuous) | 5 A per transistor - Sustained DC current handling per die; determines heatsink sizing for continuous conduction mode operation. |
| hFE (min) | 35 at IC = 20 A - Minimum DC current gain at high current; ensures reliable saturation drive with limited base current in high-power switches. |
| VCE(sat) | 45 mV at IC = 0.5 A / IB = 10 mA - Low saturation voltage reduces conduction loss in low-voltage, high-current paths like battery-powered motor drivers. |
| fT | 180 MHz - Transition frequency at IC = 50 mA / VCE = 10 V; supports stable operation in high-frequency PWM control loops up to ~10–20 MHz. |
| toff | 380 ns - Turn-off time under IC = 4 A / IB = ±40 mA; enables efficient switching above 100 kHz with minimal tail current losses. |
| Ptot (both on) | 2.75 W at Tamb = 25°C - Total dissipation limit when both transistors conduct simultaneously; sets PCB copper area requirement (2-inch² minimum). |
Pinout & Package
Package: SM-8 (8-lead SOT-223 variant), thermally enhanced with exposed collector pads (C1/C2) and shared thermal tab. Mounting requires soldered thermal pad to ≥2 inch² copper pour for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Collector of Transistor 1 | Primary high-current output node; electrically isolated from C2 but thermally coupled via shared tab. |
| C2 | Collector of Transistor 2 | Second high-current output node; enables dual-switch configurations without discrete paralleling. |
| B1 | Base of Transistor 1 | Low-impedance control input; requires 10–50 mA drive for full saturation at IC ≤ 4 A. |
| E1 | Emitter of Transistor 1 | Current return path for Q1; internally isolated from E2 but referenced to same ground plane on PCB. |
| B2 | Base of Transistor 2 | Independent control input; allows asynchronous or complementary drive of second transistor. |
| E2 | Emitter of Transistor 2 | Current return path for Q2; supports independent emitter degeneration or current sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated NPN topology | Enables compact half-bridge or push-pull stages without external isolation components or layout complexity. |
| High hFE at 20 A | Minimum hFE = 35 at IC = 20 A ensures stable base drive design across production lots and temperature extremes. |
| Low VCE(sat) at 0.5 A | 45 mV saturation voltage minimizes conduction loss in battery-fed 3.3–5 V logic-level switch applications. |
| Fast switching (toff = 380 ns) | Reduces switching energy loss in 100–500 kHz DC-DC converters and Class-D audio output stages. |
| Extended SOA up to 100 ms | Supports surge-tolerant operation in motor stall or inrush current events without secondary breakdown. |
Applications
| DC-DC Converter Output Stage | Brushed DC Motor Driver |
|---|---|
Use Scenario: High-efficiency buck converter output stage delivering 3–5 A at 3.3–12 V with synchronous rectification. IC Role / Device Role / Timing Role: Dual NPN pair acts as low-side switch and freewheeling path controller, replacing discrete MOSFET+driver combinations. Use Value: VCE(sat) ≤ 60 mV at IC = 2 A reduces conduction loss by >40% vs. standard bipolar transistors, improving efficiency at light-to-moderate loads. | Use Scenario: Bidirectional H-bridge for 12 V automotive window lift or seat actuator with peak currents up to 15 A. IC Role / Device Role / Timing Role: One ZDT1049TC provides two matched low-side switches; complementary high-side drive handled by external PMOS or charge-pump circuit. Use Value: Matched hFE and VCE(sat) between dies ensures balanced current sharing and eliminates need for individual emitter resistors. |
| Industrial Solenoid Driver | LED Constant-Current Array Switch |
Use Scenario: 24 V industrial solenoid control module requiring 5 A pulsed current with 100 ms dwell time and thermal robustness. IC Role / Device Role / Timing Role: Single die drives solenoid coil directly; second die reserved for auxiliary load or redundancy. Use Value: SOA validated to 100 ms at +100°C allows direct drive without snubbers or current limiting ICs, reducing BOM count. | Use Scenario: High-brightness LED array (e.g., 12 × 3 W LEDs) with analog dimming and overcurrent protection. IC Role / Device Role / Timing Role: One transistor regulates constant current via emitter-follower configuration; second handles enable/disable sequencing. Use Value: hFE stability from 10 mA to 4 A enables precise current setting across 100:1 dimming range without feedback compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXT1049DFTA | Single-die SOT-223-3; identical VCEO, IC, hFE specs but no dual topology. | Requires two devices and extra PCB area for same functionality; lacks thermal coupling benefit. | Select when board space permits discrete duplication and thermal isolation is preferred. |
| MBT3904DW1T1G | SOT-363 dual NPN; VCEO = 40 V, IC = 200 mA - 25× lower current rating. | Only suitable for signal-level or pre-driver stages, not main power switching. | Select only for low-power bias networks or digital logic interfacing, not power conversion. |
Compared with ZXT1049DFTA and MBT3904DW1T1G, ZDT1049TC uniquely delivers dual high-current switching in one thermally optimized package, enabling higher power density and matched dynamic performance where space and thermal coupling matter.
Availability
ZDT1049TC is available at Aetrix Electronics and suitable for DC-DC converter output stages, brushed DC motor drivers, industrial solenoid controllers, and LED constant-current arrays requiring stable component supply and long-term manufacturability.
Supply support for ZDT1049TC 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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.
ZDT1049TC belongs to the ZXT/ZDT high-gain bipolar transistor product line, engineered specifically for high-current, medium-voltage switching in space-constrained industrial and automotive power modules.
FAQ
What is the maximum pulsed collector current rating for ZDT1049TC?
The absolute maximum pulsed collector current (ICM) is 20 A per transistor, specified under pulsed conditions: pulse width = 300 µs, duty cycle ≤ 2%. This rating applies to short-duration surges such as motor startup or capacitor charging, not continuous operation.
Can ZDT1049TC be used in linear amplifier applications?
Yes, but with strict thermal derating: its SOA curve shows safe operation up to VCE = 10 V / IC = 2 A for DC conditions at Tj = 25°C. For linear use, ensure junction temperature remains below 150°C using active cooling or reduced bias, as Ptot drops to 45.5 °C/W at elevated ambient.
Is the thermal pad electrically isolated in the SM-8 package?
No - the exposed thermal pad is internally connected to the collectors (C1 and C2). It must be soldered to a grounded or low-impedance power plane, and electrical isolation from other signals requires clearance and solder mask definition per IPC-2221B.
How does hFE vary across temperature for ZDT1049TC?
hFE increases with temperature: typical values rise ~0.5%/°C from −55°C to +100°C. At IC = 4 A, hFE is ~300 at 25°C and ~450 at 100°C. Designers must verify base drive margin remains sufficient at maximum operating temperature.
ZDT1049TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-223-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- 2 NPN (Dual)
- Current - Collector (Ic) (Max):
- 5A
- Voltage - Collector Emitter Breakdown (Max):
- 25V
- Vce Saturation (Max) @ Ib, Ic:
- 220mV @ 50mA, 4A
- Current - Collector Cutoff (Max):
- 10nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 1A, 2V
- Power - Max:
- 2.75W
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
ZDT1049TC FAQ
1.How can I place an order for ZDT1049TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZDT1049TC 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 ZDT1049TC reliable?
The price and inventory of ZDT1049TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZDT1049TC is usually 5 days.
3.What payment methods are accepted for ZDT1049TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZDT1049TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZDT1049TC?
ZDT1049TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZDT1049TC 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 ZDT1049TC?
For technical support, including ZDT1049TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZDT1049TC requirements.
6.How does Aetrix verify that ZDT1049TC is sourced from the original manufacturer or authorized distributors?
All ZDT1049TC 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 ZDT1049TC meets industry standards.
7.What is the process for return or replacement of ZDT1049TC?
All ZDT1049TC units undergo pre-shipment inspection (PSI). If there is an issue with ZDT1049TC, 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 ZDT1049TC part is unused and in its original packaging.
Return procedure for ZDT1049TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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