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Renesas 2SK1838L-E
- Part No.:
- 2SK1838L-E
- Manufacturer:
- Renesas
- Category:
- FETs, MOSFETs
- Package:
- -
- Datasheet:
-
2SK1838L-E.pdf
- Description:
- N-CHANNEL POWER MOSFET
- Quantity:
- Payment:
- Shipping:
Inventory:1,773
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Product details
Overview
2SK1838L-E from Renesas Electronics is a silicon N-channel MOSFET designed for high-speed power switching in DC-DC converters and switching regulators. It features 250 V VDSS, 1 A continuous drain current, 5.5 Ω typical RDS(on) at VGS = 10 V, 6 ns rise time, and DPAK(L)-(1) surface-mount package with drain-connected tab for thermal performance.
For engineers reviewing the 2SK1838L-E datasheet, 2SK1838L-E pinout, 2SK1838L-E application, or 2SK1838L-E equivalent, this device is selected for compact, medium-voltage switching where low drive current, absence of secondary breakdown, and fast turn-off (10 ns td(off)) are critical in flyback and buck topologies.
Technical Context
This MOSFET operates as a unidirectional voltage-controlled switch in hard-switched SMPS stages. Its gate threshold voltage range (2.0–3.0 V) enables compatibility with standard 5 V and 10 V logic-level drivers, while its 60 pF input capacitance and 5 pF reverse transfer capacitance support stable high-frequency operation up to several hundred kHz.
The integrated body diode exhibits 0.96 V forward voltage at 1 A and 160 ns reverse recovery time-key for synchronous rectification evaluation and freewheeling path design in non-isolated converters. Thermal resistance θch–c = 12.5 °C/W (Tc = 25 °C) confirms suitability for PCB copper-pour heatsinking in DPAK-L footprint layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 250 V - supports 200 V DC bus designs with 25% margin for voltage spikes in industrial DC-DC supplies. |
| RDS(on) | 5.5 Ω typ. at ID = 0.5 A, VGS = 10 V - enables <1 W conduction loss at rated current, reducing thermal load on small PCBs. |
| tr/tf | 6 ns / 4.5 ns - minimizes switching transition losses in 200–500 kHz converter designs. |
| Ciss/Coss | 60 pF / 30 pF - low input/output capacitance eases gate driver sizing and improves efficiency at high frequency. |
| VGS(off) | 2.0–3.0 V - ensures reliable turn-on with 3.3 V or 5 V microcontroller GPIO without level-shifting. |
| trr | 160 ns - defines minimum dead-time requirements when used with complementary switches in half-bridge configurations. |
| Pch | 10 W at Tc = 25 °C - sets maximum continuous power dissipation under direct heatsink mounting conditions. |
Pinout & Package
2SK1838L-E uses the DPAK(L)-(1) package (Renesas code PRSS0004ZD-A), a thermally enhanced variant of DPAK with extended drain tab for improved heat transfer to PCB copper. Dimensions: 16.2 × 5.5 × 3.1 mm (L × W × H), mass 0.42 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Gate | Control electrode; requires ≤±30 V rating and ≤±10 µA leakage; driven by low-current logic sources. |
| 2 (D) | Drain | Main high-side power terminal; internally connected to metal tab for thermal and electrical continuity to heatsink plane. |
| 3 (S) | Source | Reference node for gate drive; common return path for load current and body diode conduction. |
| 4 (D) | Drain (redundant) | Second drain connection-electrically identical to Pin 2-enhances current handling and thermal spreading via dual-tab layout. |
Key Features
| Feature | Design Value |
|---|---|
| Low RDS(on) | 5.5 Ω typical enables <0.3 W conduction loss at 250 mA, supporting energy-efficient low-power SMPS. |
| No secondary breakdown | Eliminates safe operating area (SOA) derating constraints during transient overloads, simplifying protection design. |
| Low drive current requirement | Gate charge Qg not specified but inferred from Ciss = 60 pF - allows direct drive from MCU GPIO without external buffer. |
| High-speed switching | 10 ns td(off) + 4.5 ns tf reduces total switching time to <20 ns, cutting cross-conduction losses in PWM stages. |
| Integrated body diode | VDF = 0.96 V @ 1 A supports efficient freewheeling in buck/flyback without external diode in cost-sensitive designs. |
Applications
| AC-DC Adapter Power Stage | Industrial DC-DC Buck Converter |
|---|---|
|
Use Scenario: Primary-side switching in 12–24 V output, 15–30 W offline adapters with universal AC input. IC Role / Device Role / Timing Role: High-side N-channel MOSFET in discontinuous conduction mode (DCM) flyback topology. Use Value: 250 V VDSS accommodates reflected output voltage plus leakage spike margin; low RDS(on) maintains >85% efficiency at full load. |
Use Scenario: Step-down regulator powering PLC I/O modules from 24 V rail in factory automation systems. IC Role / Device Role / Timing Role: Main switching element in synchronous buck converter operating at 300 kHz. Use Value: Fast 6 ns rise time and 160 ns trr allow tight dead-time control, minimizing shoot-through risk with discrete synchronous rectification. |
| LED Driver for Street Lighting | Telecom DC-DC Module |
|
Use Scenario: Constant-current boost controller driving 12–20 V LED strings from 12 V battery backup in outdoor lighting. IC Role / Device Role / Timing Role: Switching transistor in boost converter stage with peak current mode control. Use Value: No secondary breakdown permits robust operation during LED open-circuit transients; 150 °C Tch rating supports sealed fixture thermal environments. |
Use Scenario: Isolated 48 V to 3.3/5 V DC-DC module in telecom line cards requiring high reliability and low EMI. IC Role / Device Role / Timing Role: Active clamp switch in active-clamp forward converter primary side. Use Value: Low Coss (30 pF) and Crss (5 pF) reduce capacitive losses and improve ZVS behavior at 250 kHz switching frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP2NK60ZFP | 600 V VDSS, 2 A ID, 4.5 Ω RDS(on), TO-220FP package | Higher voltage rating suits 380 V PFC front-ends; larger package requires more board space and thermal vias. | Choose when system input exceeds 300 V DC or when through-hole assembly is preferred. |
| IRFZ44NPBF | 55 V VDSS, 49 A ID, 28 mΩ RDS(on), TO-220 package | Lower voltage rating limits use to ≤40 V bus; higher current capacity irrelevant for 1 A applications. | Choose only for low-voltage, high-current motor drive or solenoid control-not for 200+ V SMPS. |
Compared with STP2NK60ZFP and IRFZ44NPBF, the 2SK1838L-E offers optimal balance of 250 V rating, DPAK-L thermal performance, and sub-10 ns switching for compact, medium-power DC-DC converters-making it unsuitable as a drop-in replacement for either alternative due to voltage and package mismatch.
Availability
2SK1838L-E is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC buck converters, LED street lighting drivers, and telecom power modules requiring stable component supply and long-lifecycle support.
Supply support for 2SK1838L-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The 2SK1838L-E belongs to Renesas' legacy silicon MOSFET product line targeting cost-effective, high-reliability power switching in non-safety-critical industrial and consumer power supplies.
FAQ
What is the maximum continuous drain current rating for the 2SK1838L-E?
The 2SK1838L-E has a continuous drain current (ID) rating of 1 A at Ta = 25 °C. This value is derated above 25 °C ambient per the channel dissipation curve; at Tc = 25 °C, it supports 10 W channel dissipation, enabling higher current capability under heatsink-mounted conditions. Always verify actual ID against PCB layout and thermal design using the normalized transient thermal impedance chart in the 2SK1838L-E datasheet.
Does the 2SK1838L-E have a built-in body diode, and what are its key parameters?
Yes, the 2SK1838L-E integrates a body diode between source and drain. Its forward voltage (VDF) is 0.96 V at IF = 1 A and VGS = 0, and its reverse recovery time (trr) is 160 ns under di/dt = 100 A/µs. These values are confirmed in the Electrical Characteristics table of the 2SK1838L-E datasheet and define freewheeling behavior in buck and flyback topologies.
Is the 2SK1838L-E pin-compatible with the 2SK1838S variant?
No-the 2SK1838L-E uses the DPAK(L)-(1) package (PRSS0004ZD-A) with extended drain tab and 0.42 g mass, while the 2SK1838S uses the smaller DPAK(S) (PRSS0004ZD-C) with 0.28 g mass and different mechanical dimensions. Though both share identical pin numbering (G-D-S-D), their thermal profiles and PCB footprints differ; layout redesign is required when substituting between them. This distinction is documented in the Package Dimensions section of the 2SK1838L-E datasheet.
What gate drive voltage is required to fully enhance the 2SK1838L-E?
The 2SK1838L-E achieves full enhancement at VGS = 10 V, where RDS(on) is specified as 5.5 Ω typical. Its gate threshold voltage (VGS(off)) ranges from 2.0 V to 3.0 V, meaning it begins conducting significantly above 3 V-but for minimal RDS(on) and consistent switching, 10 V drive is recommended. The 2SK1838L-E datasheet confirms these values in the Electrical Characteristics table under "Static drain to source on state resistance" and "Gate to source cutoff voltage."
Can the 2SK1838L-E be used in automotive applications?
The 2SK1838L-E is classified as a "Standard" quality grade device per Renesas documentation, intended for computers, office equipment, and industrial robots-not for automotive or safety-critical systems. It lacks AEC-Q101 qualification, and Renesas explicitly prohibits use in transportation equipment without prior written consent. For automotive-grade alternatives, consult Renesas' RAJ or RV series MOSFETs, not the 2SK1838L-E.
2SK1838L-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:
- -
2SK1838L-E FAQ
1.How can I place an order for 2SK1838L-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SK1838L-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 2SK1838L-E reliable?
The price and inventory of 2SK1838L-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK1838L-E is usually 5 days.
3.What payment methods are accepted for 2SK1838L-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK1838L-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SK1838L-E?
2SK1838L-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SK1838L-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 2SK1838L-E?
For technical support, including 2SK1838L-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK1838L-E requirements.
6.How does Aetrix verify that 2SK1838L-E is sourced from the original manufacturer or authorized distributors?
All 2SK1838L-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 2SK1838L-E meets industry standards.
7.What is the process for return or replacement of 2SK1838L-E?
All 2SK1838L-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SK1838L-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 2SK1838L-E part is unused and in its original packaging.
Return procedure for 2SK1838L-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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