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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Renesas 2SK1957-E

Name: 2SK1957-E
Brand: Renesas
SKU: 2SK1957-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK1957-E

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: -

Datasheet:: 2SK1957-E.pdf

Description:: N-CHANNEL POWER MOSFET

Quantity:: RFQ Add To RFQ list

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Inventory:1,871

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Product details

Overview

2SK1957-E from Renesas Electronics is a silicon N-channel power MOSFET designed for high-speed switching in DC-DC converters and motor control circuits. It features 200 V V_DSS, 7 A continuous drain current, 0.33 Ω typical R_DS(on) at V_GS = 10 V, 4.5 S typical |y_fs|, and TO-220FM package with isolated tab.

For engineers reviewing the 2SK1957-E datasheet, 2SK1957-E pinout, 2SK1957-E application, or 2SK1957-E equivalent, this device is selected for stable high-voltage switching where low conduction loss, fast turn-on/turn-off (t_d(on) = 20 ns, t_f = 35 ns), and rugged body diode recovery (t_rr = 150 ns) are critical in industrial power supplies and brush-type motor drivers.

Technical Context

This MOSFET employs a planar vertical DMOS structure optimized for low R_DS(on) and minimized gate charge (Q_g not specified but inferred from C_iss = 700 pF, C_oss = 260 pF). Its gate threshold voltage range (V_GS(off) = 2.0–4.0 V) ensures reliable enhancement-mode operation with standard 10 V gate drive.

The integrated body diode supports freewheeling in buck and half-bridge topologies, with V_DF = 1.1 V at I_F = 7 A and t_rr = 150 ns under di/dt = 100 A/µs - enabling efficient synchronous rectification replacement in non-isolated converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	200 V - supports 160 V DC bus designs with 25% safety margin
I_D (continuous)	7 A at T_c = 25°C - enables 50–100 W power stage operation with heatsink
R_DS(on)	0.33 Ω typ. @ V_GS = 10 V - yields <1.6 W conduction loss at 7 A
t_d(on)/t_f	20 ns / 35 ns - allows >500 kHz switching in hard-switched topologies
C_iss/C_oss	700 pF / 260 pF @ V_DS = 10 V - determines gate drive strength and EMI profile
t_rr	150 ns - limits reverse recovery loss in discontinuous conduction mode
P_ch	30 W @ T_c = 25°C - defines thermal design basis with θ_ch-c = 4.17°C/W

Pinout & Package

2SK1957-E is housed in TO-220FM (RENESAS code PRSS0003AD-A), a full-molded variant of TO-220 with electrically isolated metal tab for simplified heatsinking and enhanced creepage.

Pin/Terminal	Circuit Role	Design Meaning
1: Gate (G)	Control electrode	Receives voltage-controlled signal to modulate channel conductivity; requires ≤±20 V rating and ≤±10 µA leakage
2: Drain (D)	High-side power terminal	Connects to positive rail or inductive load; rated for 200 V blocking and 28 A pulsed current
3: Source (S)	Reference/return terminal	Serves as common return path for load current and gate drive reference; tied to PCB ground plane

Key Features

Feature	Design Value
No secondary breakdown	Enables safe operation under inductive switching stress without SOA derating constraints
Low drive current requirement	Reduces gate driver IC loading due to moderate C_iss and absence of Miller plateau issues
High-speed switching	Combined t_d(on), t_r, t_d(off), t_f < 150 ns supports high-frequency SMPS designs
Body diode with fast recovery	t_rr = 150 ns and Q_rr optimized for reduced switching loss in freewheeling paths
Isolated tab package	TO-220FM's insulated metal tab eliminates need for mica washers in heatsink mounting

Applications

DC-DC Buck Converter	Brush DC Motor Driver
Use Scenario: Step-down regulation from 160 V DC bus to 24 V for industrial control modules. IC Role / Device Role / Timing Role: High-side synchronous switch in fixed-frequency PWM topology operating at 300 kHz. Use Value: 0.33 Ω R_DS(on) minimizes conduction loss; 150 ns t_rr prevents shoot-through during dead-time commutation.	Use Scenario: H-bridge phase-control driver for 24 V, 5 A brushed motors in automated valves. IC Role / Device Role / Timing Role: Low-side switching element handling bidirectional current with regenerative braking. Use Value: No secondary breakdown allows safe inductive flyback; 28 A pulse rating accommodates startup surge currents.
Switching Regulator Auxiliary Switch	AC-DC PFC Front-End Switch
Use Scenario: Auxiliary FET in active clamp forward converter for reset winding energy recovery. IC Role / Device Role / Timing Role: Clamped inductive switch synchronized to main transformer reset cycle. Use Value: 200 V V_DSS withstands reflected reset voltage spikes; low C_oss reduces capacitive turn-on loss.	Use Scenario: Boost switch in 300 W single-phase PFC stage operating at 65 kHz. IC Role / Device Role / Timing Role: Main power switch conducting discontinuous current with high di/dt. Use Value: Fast t_f = 35 ns and low Q_g (inferred from C_iss) reduce gate drive losses and EMI generation.

DC-DC Buck Converter

Brush DC Motor Driver

Use Scenario: Step-down regulation from 160 V DC bus to 24 V for industrial control modules.

IC Role / Device Role / Timing Role: High-side synchronous switch in fixed-frequency PWM topology operating at 300 kHz.

Use Value: 0.33 Ω R_DS(on) minimizes conduction loss; 150 ns t_rr prevents shoot-through during dead-time commutation.

Use Scenario: H-bridge phase-control driver for 24 V, 5 A brushed motors in automated valves.

IC Role / Device Role / Timing Role: Low-side switching element handling bidirectional current with regenerative braking.

Use Value: No secondary breakdown allows safe inductive flyback; 28 A pulse rating accommodates startup surge currents.

Switching Regulator Auxiliary Switch

AC-DC PFC Front-End Switch

Use Scenario: Auxiliary FET in active clamp forward converter for reset winding energy recovery.

IC Role / Device Role / Timing Role: Clamped inductive switch synchronized to main transformer reset cycle.

Use Value: 200 V V_DSS withstands reflected reset voltage spikes; low C_oss reduces capacitive turn-on loss.

Use Scenario: Boost switch in 300 W single-phase PFC stage operating at 65 kHz.

IC Role / Device Role / Timing Role: Main power switch conducting discontinuous current with high di/dt.

Use Value: Fast t_f = 35 ns and low Q_g (inferred from C_iss) reduce gate drive losses and EMI generation.

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
STP7NK20ZFP	200 V, 7 A, R_DS(on) = 0.32 Ω, TO-220FP package (non-isolated tab)	Requires insulating hardware for heatsink mounting; slightly lower C_oss (220 pF)	Preferred where cost sensitivity outweighs isolation requirement and layout allows insulation
IXTP7N20P	200 V, 7 A, R_DS(on) = 0.36 Ω, TO-220 package (isolated tab), t_rr = 120 ns	Faster body diode but higher R_DS(on); same footprint and isolation capability	Chosen when tighter t_rr tolerance is needed and 0.03 Ω R_DS(on) penalty is acceptable

Compared with STP7NK20ZFP and IXTP7N20P, the 2SK1957-E offers identical voltage/current ratings and TO-220FM isolation, but delivers the lowest R_DS(on) (0.33 Ω) and balanced switching speed-making it optimal for thermally constrained, high-efficiency 200 V industrial SMPS where tab isolation is mandatory.

Availability

2SK1957-E is available at Aetrix Electronics and suitable for DC-DC converters, motor control systems, and switching regulators requiring stable component supply and long-term industrial lifecycle support.

Supply support for 2SK1957-E 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 delivering microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 2SK1957-E belongs to Renesas' legacy silicon power MOSFET product line, engineered specifically for robust high-voltage switching in industrial power conversion equipment where reliability and thermal stability are critical.

FAQ

What is the maximum continuous drain current rating for the 2SK1957-E?

The 2SK1957-E has a continuous drain current (I_D) rating of 7 A at case temperature T_c = 25°C. This rating assumes proper heatsinking and derates linearly above 25°C per the thermal resistance θ_ch-c = 4.17°C/W. At T_c = 100°C, the usable I_D drops to approximately 4.2 A. The 2SK1957-E must be operated within this limit to avoid thermal runaway or permanent damage.

Does the 2SK1957-E have an electrically isolated tab?

Yes, the 2SK1957-E uses the TO-220FM package (RENESAS code PRSS0003AD-A), which features an electrically isolated metal tab. This eliminates the need for insulating pads or washers when mounting to a heatsink, simplifying thermal design and improving long-term reliability in high-vibration environments. The isolation withstands ≥2500 V RMS per JEITA standards.

What is the gate threshold voltage range for the 2SK1957-E?

The 2SK1957-E has a gate-to-source cutoff voltage (V_GS(off)) range of 2.0 V to 4.0 V, measured at I_D = 1 mA and V_DS = 10 V. This ensures consistent enhancement-mode behavior across manufacturing lots and allows reliable turn-on with standard 10 V logic-level gate drivers while maintaining low off-state leakage (<10 µA).

Can the 2SK1957-E be used in avalanche conditions?

No - the 2SK1957-E datasheet does not specify avalanche energy rating (E_AS) or guaranteed unclamped inductive switching capability. Its "no secondary breakdown" feature applies only to forward-biased safe operating area (SOA) operation. For circuits subject to inductive switching transients exceeding V_DSS, external clamping (e.g., TVS or RCD snubber) is required to protect the 2SK1957-E.

What is the typical body diode forward voltage of the 2SK1957-E?

The 2SK1957-E body diode exhibits a typical forward voltage (V_DF) of 1.1 V at I_F = 7 A and V_GS = 0 V. This value is confirmed under pulsed test conditions and reflects low-loss freewheeling performance essential in buck and flyback topologies. Reverse recovery time is 150 ns under di/dt = 100 A/µs, supporting efficient operation up to ~200 kHz.

2SK1957-E 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:: -

2SK1957-E FAQ

1.How can I place an order for 2SK1957-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK1957-E 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 2SK1957-E reliable?

The price and inventory of 2SK1957-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK1957-E is usually 5 days.

3.What payment methods are accepted for 2SK1957-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK1957-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK1957-E?

2SK1957-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK1957-E 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 2SK1957-E?

For technical support, including 2SK1957-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK1957-E requirements.

6.How does Aetrix verify that 2SK1957-E is sourced from the original manufacturer or authorized distributors?

All 2SK1957-E 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 2SK1957-E meets industry standards.

7.What is the process for return or replacement of 2SK1957-E?

All 2SK1957-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SK1957-E, 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 2SK1957-E part is unused and in its original packaging.

Return procedure for 2SK1957-E:

1.Submit a request within 90 days.

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

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