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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated FZT1048ATA

Name: FZT1048ATA
Brand: Diodes Incorporated
SKU: FZT1048ATA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FZT1048ATA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: FZT1048ATA.pdf

Description:: TRANS NPN 17.5V 5A SOT-223-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

FZT1048ATA from Diodes Incorporated is a 17.5V NPN medium-power high-gain transistor in SOT223 package, rated for 5A continuous collector current, 20A peak pulse current, and V_CE(sat) <45mV at 500mA. It delivers low on-resistance (R_SAT = 50mΩ @ 5A) and high DC current gain (h_FE = 50–440 up to 20A), enabling efficient switching in solenoid and motor control circuits.

For engineers reviewing the FZT1048ATA datasheet, FZT1048ATA pinout, FZT1048ATA application, or FZT1048ATA equivalent, key selection criteria include its 17.5V V_CEO, 5A I_C, SOT223 thermal performance (R_θJA = 41.7°C/W on 52mm×52mm 2oz Cu), and automotive-grade qualification readiness per AEC-Q101.

Technical Context

This NPN bipolar junction transistor operates as a medium-power switch with specified breakdown voltages of V_CEO = 17.5V and V_CES = 50V, supporting robust operation under transient overvoltage conditions. Its h_FE remains usable up to 20A (min 50), and V_CE(sat) stays below 350mV even at full 5A I_C with 25mA I_B.

Thermal design is enabled by R_θJL = 10.9°C/W (junction-to-lead), allowing effective heat transfer through the collector lead to PCB copper. The device meets J-STD-020 moisture sensitivity Level 1 and features matte tin-plated leads solderable per MIL-STD-202, Method 208.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	17.5V - Maximum safe collector-emitter voltage under open-base condition; defines upper rail limit in switching applications.
I_C (continuous)	5A - Continuous DC collector current capability; supports sustained load driving without derating at T_A ≤ +25°C with adequate heatsinking.
V_CE(sat) @ 5A	250–350mV - Low saturation voltage ensures <1.75W conduction loss at 5A, minimizing self-heating in power stages.
h_FE @ 20A	50–80 - Verified current gain at extreme current, enabling predictable base drive sizing for high-current switching.
R_θJA (52mm×52mm 2oz Cu)	41.7°C/W - Thermal resistance enables ~72°C rise at 3W dissipation, guiding minimum copper area requirements.
f_T	150MHz - Transition frequency supports fast switching (t_on/t_off ≤ 430ns total), suitable for PWM frequencies up to ~1–2MHz.
ESD HBM	4kV - Human-body-model ESD rating allows handling in standard assembly environments without special precautions.

Pinout & Package

Package: SOT223 (Type DN), surface-mount, 4-pin configuration with collector-connected tab for thermal and electrical connection. Molded green plastic body, UL 94V-0 rated, weight ≈0.112g.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Emitting terminal for majority carriers	Low-impedance return path; connects to ground or low-side reference in common-emitter switches.
Pin 2 (Base)	Control input for transistor biasing	Requires ~25mA drive for full 5A saturation; compatible with MCU GPIO or dedicated driver ICs.
Pin 3 (Collector)	Current-sinking output terminal	Internally connected to exposed metal tab; must be soldered to ≥25mm² copper for thermal integrity.
Pin 4 (Collector Tab)	Primary thermal and electrical path for collector	Not electrically isolated; provides dominant heat conduction path to PCB; requires direct thermal pad connection.

Key Features

Feature	Design Value
Low R_SAT	50mΩ @ 5A - Enables <1.25W conduction loss, reducing heatsink dependency in space-constrained DC modules.
High h_FE hold-up	h_FE ≥ 50 @ 20A - Maintains usable gain during surge events, ensuring reliable turn-on in motor stall or solenoid pull-in conditions.
Robust V_CES	50V - Withstands inductive kickback from 12V/24V solenoids and brushed motors without clamping diode oversizing.
Lead-free & Green	RoHS 3 compliant, halogen/antimony-free - Meets automotive and industrial environmental mandates without performance trade-offs.

Applications

Solenoid Driver

DC Motor Control

Use Scenario: Driving 12V automotive fuel injectors or HVAC actuator solenoids requiring 3–5A pulsed current.

IC Role / Device Role / Timing Role: NPN power switch in low-side configuration, controlled by microcontroller PWM or discrete logic.

Use Value: V_CEO = 17.5V safely handles back-EMF spikes; low V_CE(sat) minimizes coil heating and improves duty-cycle headroom.

Use Scenario: Controlling bidirectional brushed DC motors in industrial automation via H-bridge half-bridge stage.

IC Role / Device Role / Timing Role: High-current quadrant switch enabling forward/reverse direction and braking modes.

Use Value: 20A I_CM supports short-duration stall currents; f_T = 150MHz ensures clean edge transitions at 20kHz PWM.

Relay Driver

Power Supply Enable Switch

Use Scenario: Replacing mechanical relays in programmable logic controllers (PLCs) for 24V DC output modules.

IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relay, driven directly from FPGA or ASIC GPIO.

Use Value: 5A I_C sustains relay coil hold current; R_θJL = 10.9°C/W enables direct mounting to control board copper without auxiliary heatsinks.

Use Scenario: Enabling/disabling 5–12V power rails in embedded systems with sequenced startup or fault isolation.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling downstream LDO or DC-DC converter input.

Use Value: V_BE(on) = 880–970mV ensures compatibility with 3.3V/5V logic; low leakage (<10nA ICBO) prevents standby current drain.

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
ZXTN2018E6TA	V_CEO = 20V, I_C = 4A, SOT23 package, R_θJA = 200°C/W	Limited to ≤1A continuous use without heatsink; unsuitable for 5A solenoid loads	Select only for space-constrained low-current (<1A) logic-level switching where thermal mass is unavailable.
MJD122T4G	V_CEO = 100V, I_C = 8A, TO-252 package, h_FE = 20–100 @ 5A	Higher voltage margin but lower gain at 5A; larger footprint and higher cost	Prefer when >50V transients are expected or when TO-252 mounting and higher I_C headroom justify added size and BOM cost.

Compared with ZXTN2018E6TA and MJD122T4G, FZT1048ATA uniquely balances 5A continuous capability, 17.5V system compatibility, SOT223 thermal efficiency, and high h_FE at full load-making it optimal for compact, thermally constrained 12–24V industrial actuators.

Availability

FZT1048ATA is available at Aetrix Electronics and suitable for solenoid drivers, DC motor controls, and relay replacement modules requiring stable component supply across automotive Tier-2 production, industrial PLC upgrades, and medical device power sequencing.

Supply support for FZT1048ATA 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, manufacturing, and sales operations across Asia, Europe, and the Americas.

The FZT series targets medium-power bipolar switching applications in automotive, industrial, and consumer systems, emphasizing high gain retention at elevated current, low saturation voltage, and RoHS-compliant packaging for reliability-critical deployments.

FAQ

What is the maximum allowable PCB copper area for thermal performance without a heatsink?

The datasheet specifies R_θJA = 41.7°C/W when mounted on 52mm × 52mm of 2oz copper. For no external heatsink, maintain at least this pad area under the collector tab. Smaller layouts (e.g., 25mm × 25mm 1oz Cu) raise R_θJA to 78.1°C/W, limiting continuous power to ~1.6W at +25°C ambient.

Can FZT1048ATA replace a MOSFET in low-side switching applications?

Yes, but with trade-offs: it requires ~25mA base drive (vs. gate charge for MOSFETs), has higher conduction loss than modern low-R_DS(on) MOSFETs, and lacks inherent body-diode clamping. Use only where BJT advantages-like predictable h_FE-based drive and ruggedness to avalanche stress-are prioritized over efficiency.

Is FZT1048ATA qualified to AEC-Q101?

The datasheet states that automotive-qualified versions are available upon request and require PPAP documentation. The FZT1048ATA itself is not pre-qualified; customers must engage Diodes' automotive team to obtain AEC-Q101-certified variants with change control and IATF 16949 manufacturing evidence.

What is the safe operating area (SOA) limitation at 100°C case temperature?

At T_C = 100°C, the SOA curve restricts simultaneous V_CE and I_C to avoid second breakdown. For DC operation, max I_C drops to ~2.5A at V_CE = 10V. Pulse operation (≤10ms) extends this to ~4A at 10V. Always consult Figure 3 (SOA plot) in DS33182 Rev. 5–2 for time-dependent limits.

FZT1048ATA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 17.5 V

Vce Saturation (Max) @ Ib, Ic:: 350mV @ 25mA, 5A

Current - Collector Cutoff (Max):: 10nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 1A, 2V

Power - Max:: 2.5 W

Frequency - Transition:: 150MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223-3

FZT1048ATA FAQ

1.How can I place an order for FZT1048ATA through Aetrix?

Please submit a Request for Quotation (RFQ) for FZT1048ATA 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 FZT1048ATA reliable?

The price and inventory of FZT1048ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT1048ATA is usually 5 days.

3.What payment methods are accepted for FZT1048ATA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT1048ATA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FZT1048ATA?

FZT1048ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FZT1048ATA 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 FZT1048ATA?

For technical support, including FZT1048ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT1048ATA requirements.

6.How does Aetrix verify that FZT1048ATA is sourced from the original manufacturer or authorized distributors?

All FZT1048ATA 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 FZT1048ATA meets industry standards.

7.What is the process for return or replacement of FZT1048ATA?

All FZT1048ATA units undergo pre-shipment inspection (PSI). If there is an issue with FZT1048ATA, 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 FZT1048ATA part is unused and in its original packaging.

Return procedure for FZT1048ATA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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