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onsemi PZTA14T3
- Part No.:
- PZTA14T3
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
PZTA14T3.pdf
- Description:
- TRANS NPN DARL 30V 0.3A TO-261A
- Quantity:
- Payment:
- Shipping:
Inventory:30,960
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Product details
Overview
PZTA14T3 from ON Semiconductor (formerly Motorola) is an NPN silicon Darlington transistor in SOT-223 package, designed for medium-power switching applications including relay, solenoid, lamp, and print hammer drivers. It delivers DC current gain ≥10,000 at IC = 10 mA, VCE = 5 V; VCE(sat) ≤ 1.5 V at IC = 100 mA, IB = 0.1 mA; and fT ≥ 125 MHz.
For engineers reviewing the PZTA14T3 datasheet, pinout, applications, or equivalent options, key selection criteria include its Darlington configuration for high-current gain with low base drive, SOT-223 thermal performance (RθJA = 83.3°C/W), and suitability for surface-mount switching in industrial control and electromechanical actuation circuits.
Technical Context
The PZTA14T3 implements a monolithic NPN Darlington pair with integrated base-emitter resistor network optimized for saturated switching. Its architecture enables high hFE while maintaining robust breakdown ratings: VCES = VCEO = 30 V, VEBO = 10 V.
Designed for surface-mount assembly, the SOT-223 package supports wave and reflow soldering per JEDEC J-STD-020, with maximum solder temperature of 260°C for ≤10 seconds. Thermal conduction is enhanced by the exposed collector pad, enabling 1.5 W power dissipation at TA = 25°C on FR-4 PCB with specified mounting pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | NPN silicon Darlington transistor - provides high DC current gain (≥10,000) to drive loads requiring >100 mA with minimal base current. |
| VCEO / VCES | 30 V - supports switching of 24 V industrial control rails with margin against transients. |
| IC(max) | 300 mA - sufficient for driving small relays (e.g., 12 V/70 Ω coil), solenoids, and LED arrays. |
| hFE(min) | 10,000 @ IC = 10 mA, VCE = 5 V - enables microcontroller GPIO-level base drive without external amplification. |
| VCE(sat)(max) | 1.5 V @ IC = 100 mA, IB = 0.1 mA - limits power loss to ≤150 mW in saturation, supporting thermally constrained layouts. |
| fT(min) | 125 MHz - ensures stable operation beyond audio frequencies and compatibility with PWM-driven loads up to ~100 kHz. |
| RθJA | 83.3°C/W - defines thermal derating: usable at full 1.5 W only below ~45°C ambient; requires heatsinking above that. |
Pinout & Package
SOT-223 (Case 318E-04, Style 1 / TO-261AA) is a 4-pin surface-mount package with pins 1–4 arranged linearly; pin 2 and pin 4 are internally connected to the collector, providing dual collector terminals for improved thermal and current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input control terminal; accepts low-current drive (e.g., 0.1 mA) to switch 100 mA load. |
| 2 | Collector | Main high-current output node; electrically tied to pin 4 for parallel current path and thermal spreading. |
| 3 | Emitter | Common emitter return; connects to ground or low-side load reference point. |
| 4 | Collector | Second collector connection; used with pin 2 to reduce bond wire resistance and improve thermal conduction to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Darlington configuration | Enables single-transistor replacement of two-stage BJT switches, reducing component count and layout area in space-constrained designs. |
| SOT-223 thermal design | Exposed collector pad and formed leads absorb thermal stress during soldering and improve heat transfer to PCB, supporting 1.5 W dissipation with proper layout. |
| High fT bandwidth | 125 MHz minimum allows clean switching of fast PWM signals and reduces risk of oscillation in feedback-controlled loads. |
| Wave/reflow solder compatible | Qualified for standard SMT processes per JEDEC J-STD-020, eliminating need for special reflow profiles or hand-soldering. |
| Breakdown voltage margin | 30 V VCEO rating provides 25% headroom over common 24 V industrial rails, enhancing reliability under load dump or inductive kick conditions. |
Applications
| Relay Driver | Lamp Driver |
|---|---|
Use Scenario: Driving 12 V, 40 mA coil relay in programmable logic controller (PLC) output module. IC Role / Device Role / Timing Role: High-gain NPN Darlington switch providing saturated conduction with <10 µA MCU GPIO drive. Use Value: Eliminates need for discrete base resistor and second transistor stage, reducing BOM cost and PCB footprint by 30%. | Use Scenario: Controlling 24 V incandescent indicator lamps (250 mA peak) in industrial HMI panels. IC Role / Device Role / Timing Role: Low-saturation-voltage switch ensuring lamp brightness stability across supply variations. Use Value: VCE(sat) ≤ 1.5 V minimizes power loss (≤375 mW), preventing thermal runaway in sealed enclosures. |
| Solenoid Actuator | Print Hammer Interface |
Use Scenario: Energizing 24 V, 150 mA linear solenoid in automated packaging equipment. IC Role / Device Role / Timing Role: Medium-power switching element handling repetitive 100 ms ON/OFF cycles with fast turn-off. Use Value: High hFE ensures consistent activation even with aging MCU I/O drivers; fT ≥ 125 MHz supports clean edge transitions. | Use Scenario: Driving impact-type print hammers in legacy dot-matrix printers. IC Role / Device Role / Timing Role: High-current pulse switch delivering 300 mA peak pulses at 1–2 kHz repetition rate. Use Value: 300 mA IC(max) and 1.5 V VCE(sat) enable reliable hammer strike energy without thermal throttling during sustained printing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN Darlington switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX1048A | SOT-89 package; lower hFE (min 750); higher VCE(sat) (1.8 V); RθJA = 120°C/W. | Less suitable for low-base-drive or thermally dense layouts; better for cost-sensitive, lower-current (<100 mA) applications. | Select ZTX1048A only if board space permits larger SOT-89 footprint and thermal budget allows higher junction rise. |
| MJD122G | TO-252 (DPAK) package; higher IC(max) = 1 A; same hFE range; RθJA = 62°C/W (on 1 in² copper). | Preferred for higher-current (>300 mA) or higher-reliability industrial environments where thermal margin is critical. | Choose MJD122G when load current exceeds 300 mA or ambient temperature exceeds 60°C; requires different PCB footprint. |
Compared with ZTX1048A and MJD122G, the PZTA14T3 offers optimal balance of high gain, moderate current capability, and compact SOT-223 thermal performance-making it ideal for space-constrained 100–300 mA switching where base drive efficiency and manufacturability are prioritized.
Availability
PZTA14T3 is available at Aetrix Electronics and suitable for relay driver, solenoid actuator, lamp driver, and print hammer interface applications requiring stable component supply and long-term industrial availability.
Supply support for PZTA14T3 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
ON Semiconductor is a global semiconductor supplier focused on energy-efficient electronics, delivering power management, analog, sensor, and discrete solutions for automotive, industrial, and cloud infrastructure markets.
The PZTA14T3 belongs to ON Semiconductor's legacy Motorola small-signal transistor family, engineered specifically for robust, high-gain switching in electromechanical control systems where reliability, thermal resilience, and ease of SMT assembly are essential.
FAQ
What is the maximum continuous collector current rating for the PZTA14T3?
The PZTA14T3 has a maximum continuous collector current (IC) rating of 300 mA at TC = 25°C. This rating assumes proper thermal management via the SOT-223 package's exposed collector pad mounted on adequate PCB copper area. Derating is required above 25°C ambient per the RθJA = 83.3°C/W specification.
Does the PZTA14T3 have a built-in base-emitter resistor?
No, the PZTA14T3 does not include an integrated base-emitter resistor. It is a standard two-terminal Darlington pair (base, emitter, dual collector) requiring an external base resistor to limit drive current. This allows design flexibility in setting precise base current for varied load conditions and switching speeds.
What is the pin configuration of the PZTA14T3 in the SOT-223 package?
The PZTA14T3 uses the standard SOT-223 pinout: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (internally connected to Pin 2). This dual-collector arrangement improves current sharing and thermal conduction to the PCB, especially critical in sustained switching applications.
Can the PZTA14T3 replace the PZTA14T1, and what is the difference?
Yes, the PZTA14T3 is functionally identical to the PZTA14T1 in electrical and thermal specifications-the only difference is packaging quantity: PZTA14T1 ships in 7-inch reels of 1,000 units, while PZTA14T3 ships in 13-inch reels of 4,000 units. Both share identical SOT-223 footprint, marking (P1N), and device characteristics.
What is the PNP complement to the PZTA14T3, and how does it compare?
The officially documented PNP complement to the PZTA14T3 is the PZTA64T1. It matches in SOT-223 package, voltage ratings (VCEO = –30 V), and Darlington architecture but with inverted polarity. Its hFE min is 10,000 at IE = –10 mA, and VEC(sat) ≤ 1.5 V at IE = –100 mA, enabling complementary high-side switching in H-bridge or push-pull configurations.
PZTA14T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 300 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.5V @ 100µA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20000 @ 100mA, 5V
- Power - Max:
- 1.5 W
- Frequency - Transition:
- 125MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-261A
PZTA14T3 FAQ
1.How can I place an order for PZTA14T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZTA14T3 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 PZTA14T3 reliable?
The price and inventory of PZTA14T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZTA14T3 is usually 5 days.
3.What payment methods are accepted for PZTA14T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZTA14T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZTA14T3?
PZTA14T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZTA14T3 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 PZTA14T3?
For technical support, including PZTA14T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZTA14T3 requirements.
6.How does Aetrix verify that PZTA14T3 is sourced from the original manufacturer or authorized distributors?
All PZTA14T3 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 PZTA14T3 meets industry standards.
7.What is the process for return or replacement of PZTA14T3?
All PZTA14T3 units undergo pre-shipment inspection (PSI). If there is an issue with PZTA14T3, 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 PZTA14T3 part is unused and in its original packaging.
Return procedure for PZTA14T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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