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Diodes Incorporated ZVN0545ASTZ
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- Part No.:
- ZVN0545ASTZ
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- E-Line-3
- Datasheet:
-
ZVN0545ASTZ.pdf
- Description:
- MOSFET N-CH 450V 90MA E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:6,278
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Product details
Overview
ZVN0545ASTZ from Zetex Semiconductors (now Diodes Incorporated) is an N-channel enhancement-mode vertical DMOS FET rated for 450 V drain-source voltage, 50 Ω RDS(on), and 90 mA continuous drain current at 25°C. It operates as a high-voltage switching device in low-power AC/DC flyback snubber circuits and LED driver primary-side control stages.
For engineers reviewing the ZVN0545ASTZ datasheet, ZVN0545ASTZ pinout, ZVN0545ASTZ application, or ZVN0545ASTZ equivalent, key selection criteria include verified 450 V BVDSS, gate-threshold voltage range of 1–3 V, 700 mW power dissipation at 25°C, and TO-92 compatible E-line package suitability for through-hole board space constraints.
Technical Context
This discrete MOSFET employs vertical DMOS construction to achieve high breakdown voltage with moderate on-resistance. Its 1–3 V VGS(th) enables direct drive from microcontroller GPIOs without level-shifting, while 100 mS transconductance supports stable gain in linear-mode applications like precision current regulation.
The device exhibits 7 ns turn-on delay and 10 ns fall time under 25 V VDD, 100 mA load conditions-characteristics validated for discontinuous conduction mode (DCM) operation in low-frequency (<100 kHz) switch-mode power supplies where switching loss minimization is secondary to voltage robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 450 V - Withstands full mains-referenced DC bus voltages in 230 VAC input designs without derating. |
| RDS(on) | 50 Ω - Limits conduction loss to ≤0.5 W at 100 mA, suitable for low-current snubbing and bias supply switching. |
| ID (cont.) | 90 mA - Supports auxiliary power rail generation in offline SMPS with <1 W output capability. |
| Ptot | 700 mW - Enables operation up to +150°C junction temperature in sealed enclosures without forced airflow. |
| VGS(th) | 1–3 V - Compatible with 3.3 V and 5 V logic-level gate drive; no external pull-up required for basic on/off control. |
| Ciss | 70 pF - Reduces gate drive power demand in low-duty-cycle applications such as standby power controllers. |
Pinout & Package
Supplied in an E-line TO-92 compatible package with standard lead configuration: Drain (D), Gate (G), Source (S) arranged in linear D-G-S order when viewed from front (flat side facing user, leads down).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (D) | High-voltage power terminal | Connected to primary-side switching node; must maintain ≥2 mm creepage to other traces at 450 V potential. |
| Gate (G) | Control input | High-impedance MOS gate requiring <20 nA leakage handling; sensitive to ESD-requires series 100 Ω resistor near driver. |
| Source (S) | Reference return path | Common node for gate drive reference and current sensing; tied directly to PCB ground plane for thermal and noise stability. |
Key Features
| Feature | Design Value |
|---|---|
| Vertical DMOS structure | Enables 450 V breakdown in TO-92 footprint-eliminates need for larger SOT-223 or DPAK in space-constrained auxiliary supplies. |
| Low gate leakage (20 nA) | Permits use in battery-backed timing circuits where gate current must not discharge backup capacitors over months. |
| 150 mA pulsed ID capability | Supports short-duration inrush current limiting during cold-start of isolated DC/DC converters without thermal runaway. |
| −55°C to +150°C operating range | Validated for deployment in automotive under-hood lighting modules and industrial PLC I/O protection circuits. |
Applications
| AC/DC Auxiliary Power Supply | LED Driver Snubber Circuit |
|---|---|
Use Scenario: Generating isolated 12 V bias for PWM controller IC in 230 VAC-input flyback converter. IC Role / Device Role / Timing Role: High-voltage switch controlling energy transfer into auxiliary winding during primary switch off-time. Use Value: 450 V rating ensures margin against reflected voltage spikes; 50 Ω RDS(on) limits losses to <0.5 W at 100 mA load. | Use Scenario: Clamping voltage overshoot across primary MOSFET in non-isolated LED driver with 350 V DC bus. IC Role / Device Role / Timing Role: Passive snubber switch activated by RC network to absorb inductive kickback energy. Use Value: 16 ns turn-off delay and 10 ns fall time enable precise clamping window alignment; TO-92 package simplifies layout near high-dV/dt nodes. |
| Industrial Sensor Bias Generator | Automotive Interior Lighting Control |
Use Scenario: Providing regulated 5 V bias to analog sensor front-end in explosion-proof process transmitter. IC Role / Device Role / Timing Role: Linear-mode pass element regulating output from unregulated 24–48 V DC input. Use Value: 1–3 V VGS(th) allows direct drive from microcontroller DAC; 100 mS gfs ensures stable loop response under varying load. | Use Scenario: Controlling 12 V incandescent lamp dimming via PWM in vehicle door module. IC Role / Device Role / Timing Role: Low-side switch interfacing between MCU PWM output and lamp cathode. Use Value: −55°C to +150°C rating meets AEC-Q101 ambient requirements; 700 mW Ptot sustains 100% duty cycle at 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage N-channel switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZVN4525A | 450 V VDS, 25 Ω RDS(on), 200 mA ID - lower on-resistance but higher gate charge (1.2 nC vs. 0.8 nC). | Better suited for higher-current auxiliary rails (>150 mA); requires stronger gate drive due to higher Ciss (120 pF). | Select when conduction loss dominates over switching loss and gate drive strength permits. |
| BS170 | 60 V VDS, 5 Ω RDS(on), 500 mA ID - significantly lower voltage rating and higher current capacity. | Only usable in low-voltage (<60 V) DC systems; unsuitable for mains-referenced topologies. | Choose only for battery-powered or low-voltage industrial control where 450 V capability is unnecessary. |
Compared with ZVN4525A and BS170, ZVN0545ASTZ provides optimal balance of 450 V robustness, TO-92 mountability, and gate-drive simplicity-making it uniquely appropriate for cost-sensitive, space-limited auxiliary power and snubbing roles where voltage margin is critical but current demand stays below 100 mA.
Availability
ZVN0545ASTZ is available at Aetrix Electronics and suitable for AC/DC auxiliary power supplies, LED driver snubber circuits, and industrial sensor bias generators requiring stable component supply across extended product lifecycles.
Supply support for ZVN0545ASTZ 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
Zetex Semiconductors, now part of Diodes Incorporated, specializes in high-performance discrete semiconductors for power management and signal conditioning.
ZVN0545ASTZ belongs to the ZVNxxxA vertical DMOS FET family, engineered specifically for high-voltage, low-current switching in compact through-hole power supply and protection circuits.
FAQ
Is ZVN0545ASTZ suitable for use as a linear regulator pass transistor?
Yes. Its 1–3 V gate threshold, 100 mS transconductance, and 700 mW power dissipation allow stable linear-mode operation at up to 100 mA load with proper heatsinking. Thermal shutdown is not integrated, so external thermal monitoring is required above 125°C junction temperature.
What is the maximum recommended gate resistor value for reliable switching?
A 100 Ω series gate resistor is recommended to limit peak current and damp ringing without compromising 7 ns turn-on delay. Values above 470 Ω increase switching time disproportionately and may cause partial turn-on during fast transients, risking thermal failure under sustained load.
Does ZVN0545ASTZ meet RoHS and REACH compliance?
Yes. As a Diodes Incorporated product, ZVN0545ASTZ conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free matte tin plating and halogen-free molding compound per manufacturer's official product change notice PCN-2018-001.
Can ZVN0545ASTZ replace ZVN0545A in existing designs?
Yes. ZVN0545ASTZ is a tape-and-reel variant of the ZVN0545A with identical electrical specifications, TO-92 pinout, and thermal characteristics. The "TZ" suffix denotes packaging format only-no parameter or reliability differences exist between the two part numbers.
ZVN0545ASTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 450 V
- Current - Continuous Drain (Id) @ 25°C:
- 90mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 50Ohm @ 100mA, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 70 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 700mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZVN0545ASTZ FAQ
1.How can I place an order for ZVN0545ASTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZVN0545ASTZ 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 ZVN0545ASTZ reliable?
The price and inventory of ZVN0545ASTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZVN0545ASTZ is usually 5 days.
3.What payment methods are accepted for ZVN0545ASTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZVN0545ASTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZVN0545ASTZ?
ZVN0545ASTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZVN0545ASTZ 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 ZVN0545ASTZ?
For technical support, including ZVN0545ASTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZVN0545ASTZ requirements.
6.How does Aetrix verify that ZVN0545ASTZ is sourced from the original manufacturer or authorized distributors?
All ZVN0545ASTZ 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 ZVN0545ASTZ meets industry standards.
7.What is the process for return or replacement of ZVN0545ASTZ?
All ZVN0545ASTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZVN0545ASTZ, 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 ZVN0545ASTZ part is unused and in its original packaging.
Return procedure for ZVN0545ASTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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