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Renesas 2SK1285-AZ
- Part No.:
- 2SK1285-AZ
- Manufacturer:
- Renesas
- Category:
- FETs, MOSFETs
- Package:
- -
- Datasheet:
-
2SK1285-AZ.pdf
- Description:
- N-CHANNEL POWER MOSFET
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
2SK1285-AZ from Renesas Electronics is an N-channel power MOSFET designed for solenoid, motor, and lamp driver applications. It features RDS(on) = 0.32 Ω max at VGS = 10 V and ID = 2 A, VDSS = 100 V, ID(DC) = ±3.0 A, and built-in gate-source protection diodes. Its low input capacitance (Ciss = 500 pF typ.) supports fast switching in industrial control loads.
For engineers reviewing the 2SK1285-AZ datasheet, 2SK1285-AZ pinout, 2SK1285-AZ application, or 2SK1285-AZ equivalent, key selection criteria include its 100 V drain-source rating, 3 A DC current capability, gate threshold voltage range (1.0–2.5 V), thermal resistance (RthJA = 96.2 °C/W), and suitability for discrete high-side/low-side switching in 24 V industrial systems.
Technical Context
The 2SK1285-AZ operates as a voltage-controlled unipolar switch with enhancement-mode N-channel topology. Its gate-to-source cutoff voltage (VGS(off)) of 1.0–2.5 V ensures reliable turn-on with standard 3.3 V or 5 V logic-level drivers, while the 0.32 Ω RDS(on) minimizes conduction loss at 2 A load current.
It integrates a body diode with VSD = 0.9 V at ISD = 3 A and trr = 140 ns, enabling freewheeling in inductive loads like solenoids and DC motors. The device uses a TO-220AB package with exposed drain tab (Pin 4) for thermal coupling to heatsinks, supporting 20 W dissipation at TC = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 100 V - Withstands up to 100 V drain-source voltage, suitable for 24 V/48 V industrial bus systems with surge margin. |
| RDS(on) @ VGS=10 V | 0.32 Ω max - Limits I²R conduction loss to ≤1.28 W at 2 A, reducing heatsink requirements. |
| ID(DC) | ±3.0 A - Supports continuous 3 A load current in motor/solenoid drivers without derating at TA = 25°C. |
| Ciss | 500 pF typ. - Enables fast switching (td(on) = 40 ns, tr = 55 ns) with low gate drive power demand. |
| trr | 140 ns - Allows efficient inductive flyback recovery in relay and DC motor commutation circuits. |
| RthJA | 96.2 °C/W - Requires heatsinking for >1.3 W ambient operation; junction temperature stays below 150°C at 1.3 W in free air. |
Pinout & Package
2SK1285-AZ is housed in a TO-220AB plastic package with 4 terminals: three functional pins (Source, Drain, Gate) and one integral metal fin (Drain-connected tab) for mechanical mounting and thermal conduction. The tab is electrically connected to the Drain (Pin 4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Source terminal | Reference node for gate drive; connects to load return or ground in low-side configurations. |
| 2 (Drain) | Drain terminal | High-side connection point for switched load; ties to positive supply rail in high-side use. |
| 3 (Gate) | Control input | Voltage-controlled terminal; requires <13 nC total gate charge for full turn-on at 10 V. |
| 4 (Fin / Drain Tab) | Drain-connected thermal pad | Electrically tied to Drain; must be isolated from chassis unless Drain is at system ground potential. |
Key Features
| Feature | Design Value |
|---|---|
| Low RDS(on) | 0.32 Ω max at 10 V gate drive enables <1.3 W conduction loss at 2 A, reducing thermal design burden. |
| Built-in G-S protection diode | Integrated gate-source Zener clamps transient overvoltage to ±20 V, eliminating need for external gate protection components. |
| Fast switching performance | 40 ns turn-on delay + 55 ns rise time allows PWM operation up to ~2 MHz in optimized layouts. |
| Body diode with low VSD | 0.9 V forward drop at 3 A supports efficient freewheeling in inductive switching without external diode. |
| Standard quality grade | Qualified for computers, office equipment, industrial robots, and home appliances-excludes automotive safety or life-support use. |
Applications
| DC Motor Control | Solenoid Driver |
|---|---|
Use Scenario: Bidirectional 24 V brushed DC motor control in automated valves and positioning stages. IC Role / Device Role / Timing Role: Low-side switching element handling 2–3 A peak current during start-up and reversal. Use Value: 0.32 Ω RDS(on) limits resistive heating during stall conditions; 140 ns reverse recovery prevents shoot-through in H-bridge freewheel paths. |
Use Scenario: 24 V solenoid actuation in HVAC dampers and fluid control manifolds. IC Role / Device Role / Timing Role: High-side or low-side switch delivering pulsed 3 A current with 500 ns turn-off delay for precise timing control. Use Value: Integrated gate protection diode withstands inductive kickback up to ±20 V, eliminating external TVS in cost-sensitive designs. |
| Lamp Dimming | Industrial PLC Output Module |
Use Scenario: Phase-cut or PWM dimming of 12–24 V incandescent/halogen lamps in building automation. IC Role / Device Role / Timing Role: Power switch modulating lamp current at 100–1 kHz with minimal EMI generation. Use Value: 500 pF Ciss and 20 pF Crss reduce capacitive coupling noise; 120 ns fall time enables clean zero-crossing switching. |
Use Scenario: Discrete output stage in DIN-rail mounted programmable logic controller modules. IC Role / Device Role / Timing Role: Final-stage load switch driving 24 V DC field devices (sensors, indicators, small actuators). Use Value: TO-220AB package allows direct heatsink mounting on module backplane; 20 W PD(TC) supports sustained 3 A output without fan cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP3NK100Z | RDS(on) = 7.5 Ω max (higher on-resistance); VDSS = 1000 V; TO-220FP package (no insulated tab) | Designed for high-voltage AC mains switching (e.g., SSRs), not low-voltage DC loads | Use only if 1000 V blocking is required; unsuitable for 24 V motor/solenoid due to excessive conduction loss. |
| IRFZ44NPBF | RDS(on) = 0.028 Ω max (lower on-resistance); VDSS = 55 V; TO-220AB package with same pinout | Optimized for 12–24 V battery-powered systems; lower voltage rating limits use in 48 V industrial buses | Select when operating ≤40 V and prioritizing efficiency over voltage margin; verify gate drive compatibility (VGS(th) = 2–4 V). |
Compared with STP3NK100Z and IRFZ44NPBF, the 2SK1285-AZ uniquely balances 100 V rating, 0.32 Ω RDS(on), and integrated gate protection-making it optimal for 24–48 V industrial solenoid/motor drivers where reliability and simplicity outweigh ultra-low RDS(on) or extreme voltage tolerance.
Availability
2SK1285-AZ is available at Aetrix Electronics and suitable for DC motor control, solenoid actuation, lamp dimming, and industrial PLC output modules requiring stable component supply and long-term obsolescence management.
Supply support for 2SK1285-AZ 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
Renesas Electronics Corporation is a global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and timing solutions.
The 2SK1285-AZ belongs to Renesas' legacy discrete power MOSFET product line, engineered specifically for robust, cost-effective switching in industrial control, appliance, and automation equipment.
FAQ
What is the gate threshold voltage range for the 2SK1285-AZ?
The 2SK1285-AZ has a gate-to-source cutoff voltage (VGS(off)) of 1.0–2.5 V at VDS = 10 V and ID = 1 mA. This means the 2SK1285-AZ begins conducting significantly within this range and achieves full enhancement above ~4 V. Logic-level microcontrollers (3.3 V or 5 V) can reliably drive the 2SK1285-AZ, though 10 V gate drive is recommended for minimum RDS(on).
Does the 2SK1285-AZ require an external gate resistor?
Yes-the 2SK1285-AZ benefits from a series gate resistor (typically 10–100 Ω) to damp ringing, limit peak gate current, and control switching speed. The datasheet specifies switching times (e.g., td(on) = 40 ns, tf = 120 ns) using RG = 10 Ω. Omitting the resistor may cause oscillation or EMI; selecting too large a value slows switching and increases dynamic losses in the 2SK1285-AZ.
Can the 2SK1285-AZ be used in a high-side configuration?
Yes-the 2SK1285-AZ can operate in high-side mode, but requires a gate drive voltage referenced to the source (i.e., floating or bootstrap gate driver). Since its VGS rating is ±20 V, the gate must be driven ≥10 V above the source potential to achieve low RDS(on). Standard low-side drivers cannot directly control the 2SK1285-AZ in high-side position without level-shifting circuitry.
Is the 2SK1285-AZ RoHS compliant?
Yes-the 2SK1285-AZ complies with the EU RoHS Directive. Renesas Electronics confirms environmental compliance for this part, including restriction of lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. The "-AZ" suffix denotes RoHS-compliant packaging and processing per Renesas' standard product marking convention.
What is the maximum continuous drain current for the 2SK1285-AZ at 75°C ambient?
At TA = 75°C, the 2SK1285-AZ's maximum continuous drain current is derated to approximately 1.8 A due to thermal limitations. Its RthJA = 96.2 °C/W and PD = 1.3 W at TA = 25°C define the linear derating curve. Without heatsinking, junction temperature exceeds 150°C above this current at 75°C ambient-so proper PCB copper area or heatsink is essential for sustained 2–3 A operation in the 2SK1285-AZ.
2SK1285-AZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- FET Type:
- -
- Technology:
- -
- Drain to Source Voltage (Vdss):
- -
- Current - Continuous Drain (Id) @ 25°C:
- -
- Drive Voltage (Max Rds On, Min Rds On):
- -
- Rds On (Max) @ Id, Vgs:
- -
- Vgs(th) (Max) @ Id:
- -
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- -
- Input Capacitance (Ciss) (Max) @ Vds:
- -
- FET Feature:
- -
- Power Dissipation (Max):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
2SK1285-AZ FAQ
1.How can I place an order for 2SK1285-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SK1285-AZ 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 2SK1285-AZ reliable?
The price and inventory of 2SK1285-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK1285-AZ is usually 5 days.
3.What payment methods are accepted for 2SK1285-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK1285-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SK1285-AZ?
2SK1285-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SK1285-AZ 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 2SK1285-AZ?
For technical support, including 2SK1285-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK1285-AZ requirements.
6.How does Aetrix verify that 2SK1285-AZ is sourced from the original manufacturer or authorized distributors?
All 2SK1285-AZ 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 2SK1285-AZ meets industry standards.
7.What is the process for return or replacement of 2SK1285-AZ?
All 2SK1285-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK1285-AZ, 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 2SK1285-AZ part is unused and in its original packaging.
Return procedure for 2SK1285-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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