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Renesas FS70KMJ-2
- Part No.:
- FS70KMJ-2
- Manufacturer:
- Renesas
- Category:
- FETs, MOSFETs
- Package:
- -
- Datasheet:
-
FS70KMJ-2.pdf
- Description:
- 70A, 100V, N-CHANNEL MOSFET
- Quantity:
- Payment:
- Shipping:
Inventory:4,716
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Product details
Overview
FS70KMJ-2 from Renesas Electronics is a high-speed N-channel power MOSFET designed for switching applications in motor control, lamp control, solenoid drivers, and DC-DC converters. It features 100 V VDSS, 70 A continuous drain current (ID), 17 mΩ max rDS(ON) at VGS = 10 V, integrated fast-recovery body diode (115 ns), and 2000 V isolation voltage (Viso).
For engineers reviewing the FS70KMJ-2 datasheet, FS70KMJ-2 pinout, FS70KMJ-2 application, or FS70KMJ-2 equivalent, this device is selected for high-current, medium-voltage switching where low conduction loss, fast turn-off capability (830 ns td(off)), thermal robustness (Rth(ch–c) = 3.57 °C/W), and reinforced isolation are critical.
Technical Context
The FS70KMJ-2 employs a trench-gate vertical DMOS structure optimized for high-speed switching with low gate charge (Qg typ. ~100 nC) and minimized output capacitance (Coss = 1150 pF). Its 4 V gate threshold enables compatibility with 5 V logic-level drive while maintaining robust noise immunity.
It integrates a fast-recovery source-drain diode (trr = 115 ns, IS = 70 A) to support synchronous rectification and freewheeling in hard-switched topologies. The TO-220FN package provides direct case-to-heatsink thermal path and 2000 V AC isolation between terminals and heatsink-mounting surface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 100 V - Maximum blocking voltage before avalanche; supports 48 V and 60 V bus systems with margin. |
| ID (continuous) | 70 A at Tc = 25°C - Sustains high load currents in motor drives and industrial power stages. |
| rDS(ON) (max) | 17 mΩ at VGS = 10 V - Limits conduction loss to ≤0.42 W at 35 A, enabling efficient thermal design. |
| td(off) | 830 ns - Enables high-frequency PWM operation up to ~100 kHz with controlled switching loss. |
| Viso | 2000 V AC for 1 minute - Provides reinforced insulation for safety-critical industrial equipment mounting. |
| Rth(ch–c) | 3.57 °C/W - Allows 35 W dissipation with ≤125°C channel temperature using modest heatsinking. |
| trr | 115 ns - Reduces reverse recovery loss and EMI in inductive switching circuits. |
Pinout & Package
FS70KMJ-2 is housed in the TO-220FN package (RENESAS code PRSS0003AB-A), featuring insulated tab for direct heatsink mounting without additional isolation hardware.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Gate) | Control input | Receives gate drive signal; threshold voltage 1.0–2.0 V ensures reliable turn-on with 5 V logic. |
| 2 (Drain) | High-side switch node | Connected to positive rail or inductive load; rated for 100 V and 280 A pulsed current. |
| 3 (Source) | Power return / reference | Common return path for load current; also serves as cathode of integrated fast-recovery diode. |
Key Features
| Feature | Design Value |
|---|---|
| Logic-level gate drive | Operates fully enhanced at VGS = 4 V, compatible with microcontroller GPIOs and low-voltage gate drivers. |
| Integrated fast-recovery diode | 115 ns trr at IS = 70 A reduces switching loss and eliminates need for external anti-parallel diode in H-bridge designs. |
| Isolated package | 2000 V AC isolation between leads and metal tab enables safe, direct heatsink mounting without insulating pads or washers. |
| Low gate charge | Typical Qg ≈ 100 nC minimizes driver power requirement and improves switching efficiency at high frequencies. |
| Robust avalanche rating | IDA = 70 A (pulsed, L = 100 µH) supports unclamped inductive switching without failure under transient overloads. |
Applications
| Brushed DC Motor Drive | Industrial Lamp Dimming |
|---|---|
Use Scenario: Bidirectional control of 24–48 V brushed DC motors in automated machinery and robotics. IC Role / Device Role / Timing Role: High-side or low-side switching element in H-bridge configuration; handles 70 A peak stall current and 100 V flyback transients. Use Value: Low rDS(ON) and fast td(off) reduce heat generation during PWM commutation, extending motor driver lifetime. |
Use Scenario: Phase-angle or PWM dimming of high-wattage halogen and LED lamps in factory lighting systems. IC Role / Device Role / Timing Role: Main switching transistor in AC/DC or DC/DC stage; withstands line surges and lamp inrush currents. Use Value: Integrated fast diode enables zero-crossing switching and suppresses voltage spikes during lamp turn-off. |
| Solenoid Actuator Control | Non-Isolated DC-DC Converter |
Use Scenario: Driving 12–48 V solenoids in pneumatic valves, hydraulic controls, and industrial automation. IC Role / Device Role / Timing Role: Low-side switch controlling solenoid coil current; absorbs inductive kickback via integrated diode. Use Value: 115 ns trr prevents voltage overshoot beyond 100 V, eliminating need for snubbers in compact valve modules. |
Use Scenario: High-current synchronous buck converter for FPGA or ASIC core voltage regulation (e.g., 12 V → 1.2 V @ 50 A). IC Role / Device Role / Timing Role: High-side power switch; operates at 100–200 kHz with minimal conduction and switching losses. Use Value: 17 mΩ rDS(ON) and 3.57 °C/W Rth(ch–c) enable >94% efficiency and stable thermal performance without forced air 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 |
|---|---|---|---|
| STP70NF10 | Same VDSS (100 V), higher rDS(ON) (18 mΩ max), no isolation rating, TO-220 (non-isolated) package. | Lacks 2000 V isolation; requires insulating pad for heatsink mounting; suitable only where creepage/clearance permits. | Choose STP70NF10 only when isolation is not required and board space allows for external insulation. |
| IXFH70N10P | Same VDSS and ID, lower rDS(ON) (12 mΩ typ.), but no integrated diode and no isolation rating; TO-247 package. | Requires external fast diode; larger footprint; unsuitable for isolated heatsink mounting without additional barrier. | Select IXFH70N10P only if lowest conduction loss is prioritized and isolation can be achieved via layout or system-level design. |
Compared with STP70NF10 and IXFH70N10P, the FS70KMJ-2 uniquely combines 2000 V isolation, integrated 115 ns diode, and TO-220FN packaging-making it the only option among the three that eliminates external isolation components and simplifies thermal/mechanical design in safety-regulated industrial equipment.
Availability
FS70KMJ-2 is available at Aetrix Electronics and suitable for motor control, lamp dimming, and solenoid actuation requiring stable component supply, long-term industrial lifecycle support, and certified isolation compliance.
Supply support for FS70KMJ-2 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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The FS70KMJ-2 belongs to Renesas' high-speed power MOSFET product line, engineered specifically for ruggedized industrial switching applications demanding reliability, isolation integrity, and fast dynamic response under high-current stress.
FAQ
What is the maximum continuous drain current rating for FS70KMJ-2?
The FS70KMJ-2 is rated for 70 A continuous drain current (ID) at case temperature Tc = 25°C. Derating applies above 25°C per the power dissipation curve; at Tc = 100°C, usable ID drops to approximately 40 A. This rating assumes proper heatsinking with Rth(ch–c) = 3.57 °C/W and accounts for the device's 35 W maximum power dissipation limit.
Does FS70KMJ-2 require an external flyback diode in inductive load applications?
No, the FS70KMJ-2 includes an integrated fast-recovery source-drain diode with typical reverse recovery time (trr) of 115 ns at IS = 70 A. This diode is rated for full 70 A continuous forward current and eliminates the need for an external diode in most motor, solenoid, and relay driving configurations-reducing BOM count and PCB area.
What is the gate threshold voltage range specified for FS70KMJ-2?
The FS70KMJ-2 has a gate-source threshold voltage (VGS(th)) range of 1.0 V to 2.0 V (min to max) at ID = 1 mA and VDS = 10 V. This low threshold enables full enhancement with 4 V gate drive, making the FS70KMJ-2 compatible with 5 V logic families and low-voltage gate drivers without level-shifting circuitry.
Can FS70KMJ-2 be mounted directly to a heatsink without electrical isolation hardware?
Yes-the FS70KMJ-2 uses the TO-220FN package with 2000 V AC isolation between all leads and the metal tab. This allows direct mechanical mounting to a grounded heatsink without insulating pads, sil-pads, or shoulder washers, simplifying thermal design and improving long-term reliability in industrial environments.
What is the typical gate charge (Qg) of FS70KMJ-2 and how does it impact switching performance?
The FS70KMJ-2 exhibits typical total gate charge (Qg) of approximately 100 nC at VGS = 10 V. This moderate Qg enables efficient high-frequency switching (up to ~150 kHz) with standard gate drivers while keeping switching losses balanced against conduction losses-critical for optimizing efficiency in DC-DC converters and motor inverters.
FS70KMJ-2 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:
- -
FS70KMJ-2 FAQ
1.How can I place an order for FS70KMJ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for FS70KMJ-2 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 FS70KMJ-2 reliable?
The price and inventory of FS70KMJ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FS70KMJ-2 is usually 5 days.
3.What payment methods are accepted for FS70KMJ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FS70KMJ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FS70KMJ-2?
FS70KMJ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FS70KMJ-2 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 FS70KMJ-2?
For technical support, including FS70KMJ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FS70KMJ-2 requirements.
6.How does Aetrix verify that FS70KMJ-2 is sourced from the original manufacturer or authorized distributors?
All FS70KMJ-2 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 FS70KMJ-2 meets industry standards.
7.What is the process for return or replacement of FS70KMJ-2?
All FS70KMJ-2 units undergo pre-shipment inspection (PSI). If there is an issue with FS70KMJ-2, 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 FS70KMJ-2 part is unused and in its original packaging.
Return procedure for FS70KMJ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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