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Diodes Incorporated ZXTN5551FLTA
- Part No.:
- ZXTN5551FLTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN5551FLTA.pdf
- Description:
- TRANS NPN 160V 0.6A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,088
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Product details
Overview
ZXTN5551FLTA from Diodes Incorporated is a 160V NPN high-voltage transistor in SOT23 package, rated for 600mA continuous collector current, 330mW power dissipation, and 130MHz transition frequency, used in high-voltage amplification stages of industrial power supplies and flyback controller bias networks.
For engineers reviewing the ZXTN5551FLTA datasheet, ZXTN5551FLTA pinout, ZXTN5551FLTA application, or ZXTN5551FLTA equivalent, key selection criteria include VCEO = 160V, hFE = 80–250 at IC = 10mA, VCE(sat) ≤ 150mV at IC = 50mA, thermal resistance RθJA = 379°C/W, and ESD HBM rating of 4kV.
Technical Context
This NPN bipolar junction transistor operates with a minimum BVCEO of 160V and supports linear amplification up to 100MHz small-signal gain bandwidth (fT = 130MHz). Its VBE(sat) ranges from 760mV to 1200mV across IC = 10–50mA, enabling predictable base drive design in switching and analog applications.
The device features low output capacitance (Cobo = 6pF at VCB = 10V), fast switching times (tr = 64ns, tf = 140ns), and robust thermal performance with TJ range from –55°C to +150°C - suitable for compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 160V - Enables use in 120VAC-derived bias rails and flyback auxiliary windings without derating. |
| IC (continuous) | 600mA - Supports medium-current driver stages for gate control or relay coils. |
| PD | 330mW - Requires minimal copper area (25mm × 25mm 1oz FR4) for thermal management in SOT23. |
| fT | 130MHz - Allows stable operation in high-frequency amplifier and oscillator feedback paths. |
| hFE | 80–250 @ IC = 10mA - Provides wide DC gain margin for reliable saturation in switching designs. |
| ESD HBM | 4000V - Reduces risk of handling damage during manual assembly or rework. |
| RθJA | 379°C/W - Predicts ~127°C junction rise above ambient at full 330mW dissipation in still air. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink node; connects to ground or low-side return path in common-emitter configurations. |
| 2 (Base) | B | Control input; requires 1mA base current to saturate at 50mA collector load per datasheet test condition. |
| 3 (Collector) | C | High-voltage output node; withstands up to 160V relative to emitter under active bias conditions. |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCEO ≥ 160V ensures safe operation in 100–120VAC line-derived circuits without external clamping. |
| Low VCE(sat) | ≤150mV at IC/IB = 10 enables efficient switching with <150mW conduction loss at 50mA load. |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb), meeting automotive and industrial environmental mandates. |
| Fast switching | tr = 64ns / tf = 140ns supports >1MHz switching in discrete driver stages without excessive ringing. |
Applications
| Industrial Power Supply Bias | Flyback Auxiliary Winding Driver |
|---|---|
Use Scenario: Providing regulated 12V bias to PWM controller ICs in offline AC/DC converters. IC Role / Device Role: NPN switch controlling current into zener-based shunt regulator or LDO input. Use Value: 160V VCEO withstands reflected flyback spikes up to 140V, eliminating need for snubbers. |
Use Scenario: Driving optocoupler LED in isolated feedback loop of 20–60W SMPS. IC Role / Device Role: Linear amplifier stage converting auxiliary winding AC to DC current for feedback signal. Use Value: 130MHz fT preserves feedback loop phase margin; 6pF Cobo minimizes signal delay distortion. |
| High-Voltage Signal Amplifier | Relay Coil Driver |
Use Scenario: Amplifying sensor signals referenced to 48V or 60V rail in telecom power shelves. IC Role / Device Role: Common-emitter amplifier with emitter degeneration for stable gain. Use Value: hFE = 80–250 allows consistent biasing across temperature; VBE(sat) variation ≤440mV from –55°C to +150°C. |
Use Scenario: Switching 24V/48V relay coils in programmable logic controllers (PLCs). IC Role / Device Role: Saturated switch interfacing microcontroller GPIO to inductive load. Use Value: 600mA IC rating covers 500mA coil currents; 4kV HBM ESD protects against field-induced latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT5551 | VCEO = 160V (same), but hFE min = 80 @ IC = 10mA vs. ZXTN5551FLTA's 80–250 range; identical SOT23 footprint. | Same functional role, but tighter hFE binning reduces gain uncertainty in precision bias networks. | Select MMBT5551 for new designs where long-term supply continuity and RoHS-compliant sourcing are prioritized. |
| ZXTP5401FL | Complementary PNP type (not drop-in); VCEO = 150V, IC = 600mA, same SOT23 package and marking convention (ZXTP prefix). | Used in push-pull or complementary pair configurations - not interchangeable but co-designed for matching thermal and gain behavior. | Choose ZXTP5401FL only when building matched NPN/PNP stages requiring identical package thermal response and process consistency. |
Compared with ZXTN5551FLTA, MMBT5551 offers improved long-term availability and identical electrical specs for new designs, while ZXTP5401FL serves as its designated PNP complement-not a replacement-for balanced circuit topologies.
Availability
ZXTN5551FLTA is available at Aetrix Electronics and suitable for industrial power supply bias, flyback auxiliary winding drivers, high-voltage signal amplifiers, and relay coil drivers requiring stable component supply and traceable green-compliant sourcing.
Supply support for ZXTN5551FLTA 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, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.
ZXTN5551FLTA belongs to Diodes' high-voltage bipolar transistor product line, engineered for robustness in industrial and telecom power systems where breakdown voltage, thermal stability, and RoHS compliance are critical.
FAQ
Is ZXTN5551FLTA recommended for new designs?
No - Diodes explicitly states "ZXTN5551FL IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE MMBT5551." The MMBT5551 shares identical absolute maximum ratings and key electrical characteristics, with enhanced long-term supply assurance and updated green compliance documentation.
What is the thermal resistance of ZXTN5551FLTA in standard PCB layout?
RθJA is 379°C/W when mounted on a 25mm × 25mm 1oz copper pad on single-sided FR4 board under still-air conditions. This value assumes no internal layer copper or thermal vias - adding those reduces effective RθJA by up to 40%.
Does ZXTN5551FLTA support automotive applications?
A dedicated automotive-grade variant exists: ZXTN5551FLQ, qualified to AEC-Q101 and documented in a separate datasheet. The ZXTN5551FLTA is industrial-grade only and lacks automotive qualification, traceability, or extended temperature validation beyond its –55°C to +150°C operating range.
How does the ZXTN5551FLTA pinout compare to standard SOT23 NPN transistors?
ZXTN5551FLTA follows JEDEC-standard SOT23 pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector - identical to MMBT5551, PN2222A, and most SOT23 NPN transistors. No adapter or footprint modification is needed for direct substitution in existing layouts.
ZXTN5551FLTA 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:
- Last Time Buy
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 600 mA
- Voltage - Collector Emitter Breakdown (Max):
- 160 V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 10mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN5551FLTA FAQ
1.How can I place an order for ZXTN5551FLTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN5551FLTA 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 ZXTN5551FLTA reliable?
The price and inventory of ZXTN5551FLTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN5551FLTA is usually 5 days.
3.What payment methods are accepted for ZXTN5551FLTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN5551FLTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN5551FLTA?
ZXTN5551FLTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN5551FLTA 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 ZXTN5551FLTA?
For technical support, including ZXTN5551FLTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN5551FLTA requirements.
6.How does Aetrix verify that ZXTN5551FLTA is sourced from the original manufacturer or authorized distributors?
All ZXTN5551FLTA 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 ZXTN5551FLTA meets industry standards.
7.What is the process for return or replacement of ZXTN5551FLTA?
All ZXTN5551FLTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN5551FLTA, 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 ZXTN5551FLTA part is unused and in its original packaging.
Return procedure for ZXTN5551FLTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXTN5551FLTA Tags
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Diodes Incorporated
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