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Diodes Incorporated ZXTN2020FTA
- Part No.:
- ZXTN2020FTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN2020FTA.pdf
- Description:
- TRANS NPN 100V 4A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,338
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Product details
Overview
ZXTN2020FTA from Diodes Incorporated (formerly Zetex Semiconductors) is a 100V, 4A NPN medium-power bipolar junction transistor in SOT23 package, featuring V(BR)CEV > 160V, RCE(sat) = 30 mΩ typical, VCE(sat) < 50 mV @ 1A, fT = 130 MHz, and PD = 1.2 W - used for high-current switching in gate drive and solenoid control circuits.
For engineers reviewing the ZXTN2020FTA datasheet, ZXTN2020FTA pinout, ZXTN2020FTA application, or ZXTN2020FTA equivalent, key selection criteria include its 160V forward blocking capability, low saturation voltage under 1A load, thermal resistance of 104°C/W on 30mm×30mm PCB, peak pulse current rating of 12A, and compatibility with compact SOT23 footprint layouts.
Technical Context
This NPN BJT employs advanced silicon process and optimized SOT23 packaging to sustain high peak currents while maintaining low VCE(sat) across 0.1–4A collector ranges. Its 160V V(BR)CEV rating enables robust operation in inductive load switching where voltage flyback exceeds 100V.
The device delivers HFE = 100–300 at IC = 10mA–10A and exhibits fast switching with ton = 37 ns and toff = 910 ns under 10V/1A conditions, supporting efficient gate driving of MOSFETs and IGBTs without external base resistors in many configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)CEV | >160 V - supports safe switching of inductive loads with high-voltage flyback transients |
| IC(cont) | 4 A - continuous current handling suitable for relay/solenoid drivers and motor control stages |
| VCE(sat) | <50 mV @ 1A - minimizes conduction loss and self-heating in high-duty-cycle applications |
| fT | 130 MHz - enables reliable high-speed switching up to ~10 MHz practical operating frequency |
| RθJA | 104 °C/W - thermal performance on 30mm×30mm 2 oz copper PCB allows 1.2W dissipation at +70°C ambient |
| toff | 910 ns - defines maximum switching frequency limit when driving capacitive gate loads |
Pinout & Package
SOT23-3 package: compact 3-pin surface-mount outline with standard lead pitch (0.95 mm), body size 2.67×1.20×1.10 mm, and JEDEC-compliant footprint for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current return path | Low-impedance connection to ground or low-side reference; must be routed with minimal inductance for fast turn-off |
| 2 (Base) | Control input | Drives transistor into saturation; requires ≥100 mA base current for full 1A collector conduction |
| 3 (Collector) | High-side switched output | Connects to load supply rail; handles up to 12A pulsed current and 160V reverse blocking |
Key Features
| Feature | Design Value |
|---|---|
| High peak current capability | 12 A pulsed - sustains short-duration inrush during relay coil energization or motor startup |
| Low saturation voltage | 30 mΩ typical RCE(sat) - reduces power loss to <50 mW at 1A, easing thermal management |
| 160V forward blocking | V(BR)CEV > 160 V - eliminates need for external clamping diodes in 100V bus applications |
| High fT | 130 MHz - ensures stable gain and predictable switching behavior above audio frequencies |
Applications
| MOSFET Gate Driver | DC Motor Control Stage |
|---|---|
Use Scenario: Driving the gate of a 60V N-channel MOSFET in half-bridge motor driver. IC Role / Device Role / Timing Role: NPN switch providing low-impedance pull-down path during MOSFET turn-off. Use Value: 910 ns toff ensures rapid gate discharge, minimizing shoot-through risk in PWM-controlled bridges. | Use Scenario: Controlling direction and enable of a 24V brushed DC motor via H-bridge low-side switches. IC Role / Device Role / Timing Role: High-current NPN switch enabling motor current flow through one leg of the bridge. Use Value: 4A continuous rating and 160V V(BR)CEV support stall current surges and back-EMF spikes without breakdown. |
| Relay Coil Driver | Solenoid Actuator Interface |
Use Scenario: Energizing a 12V/500mA automotive relay coil with transient suppression. IC Role / Device Role / Timing Role: Low-saturation switch connecting coil to 12V supply upon microcontroller command. Use Value: VCE(sat) < 50 mV at 1A limits power loss to <50 mW, avoiding thermal derating in sealed enclosures. | Use Scenario: Activating a 24V/2A industrial solenoid valve in PLC output module. IC Role / Device Role / Timing Role: Medium-power switching element interfacing logic-level control to high-current load. Use Value: 1.2W power dissipation and 104°C/W thermal resistance allow sustained 2A operation with minimal heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012E6TA | V(BR)CEO = 60V, IC = 2A, RCE(sat) = 60 mΩ typical | Limited to ≤60V systems; lower current capacity reduces margin in motor/solenoid surge events | Select only when board space and cost outweigh 100V+ blocking and 4A headroom requirements |
| MMBT4401LT1G | V(BR)CEO = 40V, IC = 0.6A, VCE(sat) = 750 mV @ 0.15A | Not suitable for 100V bus or >1A loads; significantly higher conduction loss and lower voltage safety margin | Use only in low-voltage signal-switching roles, not as functional replacement in ZXTN2020FTA designs |
Compared with ZXTN2020FTA, ZXTN2012E6TA trades voltage/current headroom for cost and footprint, while MMBT4401LT1G lacks both voltage rating and current capability for direct substitution - neither offers drop-in compatibility in gate-driving or inductive-load applications.
Availability
ZXTN2020FTA is available at Aetrix Electronics and suitable for MOSFET gate driving, relay coil control, and solenoid actuation requiring stable component supply across automotive, industrial automation, and embedded power interface designs.
Supply support for ZXTN2020FTA 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 acquired Zetex Semiconductors in 2008 and maintains its portfolio of high-performance discrete semiconductors for power management and signal conditioning.
ZXTN2020FTA belongs to Zetex's medium-power BJT family, engineered specifically for high-efficiency, high-reliability switching in space-constrained industrial and automotive interfaces.
FAQ
What is the maximum safe operating voltage for ZXTN2020FTA in continuous DC applications?
The absolute maximum VCEO is 100 V, but for reliable long-term operation, design should limit steady-state collector-emitter voltage to ≤80 V to maintain margin against transients and temperature drift. The higher V(BR)CEV (>160 V) applies only under pulsed conditions with specified base bias.
Can ZXTN2020FTA replace a MOSFET in low-side switching applications?
No - it is a bipolar transistor requiring continuous base current drive, unlike MOSFETs which are voltage-controlled. While usable for low-side switching, it incurs higher drive power and slower turn-off than comparable MOSFETs; best applied where its low VCE(sat) and high peak current justify BJT topology.
Is ZXTN2020FTA RoHS compliant and halogen-free?
Yes - Diodes Incorporated confirms ZXTN2020FTA meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with lead-free matte tin plating and compliant SOT23 molding compound.
What PCB layout practices optimize thermal performance for ZXTN2020FTA?
Use ≥30 mm × 30 mm 2 oz copper pour connected directly to the emitter pad; avoid thermal relief on emitter and collector pads; place device away from heat sources; and ensure ≥1.5 mm clearance to adjacent components to maintain 104°C/W RθJA rating.
ZXTN2020FTA 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:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 4 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 400mA, 4A
- Current - Collector Cutoff (Max):
- 20nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1A, 2V
- Power - Max:
- 1.2 W
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN2020FTA FAQ
1.How can I place an order for ZXTN2020FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN2020FTA 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 ZXTN2020FTA reliable?
The price and inventory of ZXTN2020FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN2020FTA is usually 5 days.
3.What payment methods are accepted for ZXTN2020FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN2020FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN2020FTA?
ZXTN2020FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN2020FTA 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 ZXTN2020FTA?
For technical support, including ZXTN2020FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN2020FTA requirements.
6.How does Aetrix verify that ZXTN2020FTA is sourced from the original manufacturer or authorized distributors?
All ZXTN2020FTA 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 ZXTN2020FTA meets industry standards.
7.What is the process for return or replacement of ZXTN2020FTA?
All ZXTN2020FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN2020FTA, 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 ZXTN2020FTA part is unused and in its original packaging.
Return procedure for ZXTN2020FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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