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Semtech Corporation S4KW2C-1P
- Part No.:
- S4KW2C-1P
- Manufacturer:
- Semtech Corporation
- Category:
- Diode Arrays
- Package:
- Module
- Datasheet:
-
S4KW2C-1P.pdf
- Description:
- DIODE MODULE 2000V 16A
- Quantity:
- Payment:
- Shipping:
Inventory:3,029
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Product details
Overview
S4KW2C-1P from Semtech is a standard-recovery, high-power silicon rectifier bridge configured as a center-tapped doubler with 2 A average forward current, 1000 V peak repetitive reverse voltage, and 50 A non-repetitive surge current rating, used in AC/DC power supplies for industrial motor drives and welding equipment.
For engineers reviewing the S4KW2C-1P datasheet, pinout, applications, or equivalent options, key selection criteria include its center-tap doubler topology, thermal resistance (RθJL = 2.5 °C/W), and UL recognition (E157185) for safety-critical power conversion designs.
Technical Context
This device integrates four standard-recovery diodes in a single DO-205AB (TO-220AC) package to form a center-tapped full-wave doubler configuration - two anodes tied to AC inputs, cathode and center tap as DC outputs. It operates with junction temperature up to +175 °C and exhibits typical forward voltage drop of 1.1 V at 2 A.
The S4KW2C-1P is optimized for line-frequency (50/60 Hz) rectification where low cost and robust surge handling outweigh fast switching requirements. Its design excludes soft recovery characteristics or controlled reverse recovery time, distinguishing it from fast- or ultrafast-recovery alternatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 2 A average forward current - supports continuous DC output in 100–240 VAC input supplies delivering ~20–40 W. |
| VRRM | 1000 V peak repetitive reverse voltage - enables use in 3-phase 400 VAC systems with margin against transients. |
| IFSM | 50 A non-repetitive surge current - withstands inrush during cold-start of transformer-coupled welder power stages. |
| VF @ IF=2A | 1.1 V typical forward voltage - contributes ~2.2 W conduction loss at full load, requiring heatsinking above ~1 W dissipation. |
| RθJL | 2.5 °C/W junction-to-lead thermal resistance - defines minimum heatsink requirement when mounted on PCB copper pour or chassis. |
| TJ max | +175 °C maximum junction temperature - allows operation in enclosed industrial enclosures without forced air cooling. |
Pinout & Package
Package: DO-205AB (TO-220AC), single-in-line 3-terminal plastic case with isolated metal tab (cathode-connected). Mounting hole centered on tab for mechanical fixation and thermal transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Left) | Anode 1 | Connects to one AC input leg; forms half of center-tapped doubler input pair. |
| Terminal 2 (Center) | Center Tap | Common reference node for dual-output DC rails; electrically grounded or biased per circuit topology. |
| Terminal 3 (Right) | Cathode | Positive DC output terminal; carries full rectified current to filter capacitor and load. |
Key Features
| Feature | Design Value |
|---|---|
| Center-tapped doubler topology | Enables dual-polarity DC generation from single AC source without transformer center tap - reduces transformer complexity in compact welder PSUs. |
| UL Recognized (E157185) | Validates creepage/clearance and flammability compliance for Class I industrial equipment meeting IEC 60950-1. |
| Isolated metal tab | Allows direct mounting to heatsink without insulating washer while maintaining electrical isolation between cathode and chassis ground. |
| Standard recovery diode structure | Minimizes cost and EMI in 50/60 Hz applications where reverse recovery charge (Qrr) is not critical to efficiency. |
Applications
| Industrial Motor Drive Power Supply | Resistance Welder Primary Rectification |
|---|---|
Use Scenario: Converts 3-phase 400 VAC to unregulated DC bus feeding IGBT inverter stage in HVAC compressor drives. IC Role / Device Role / Timing Role: High-current, high-voltage rectifier bridge providing center-tapped DC rails for gate driver bias and main bus. Use Value: 1000 V VRRM accommodates 3-phase line surges; 50 A IFSM handles repeated welder-like inrush during motor startup sequences. | Use Scenario: Rectifies 220 VAC single-phase supply to generate ±24 V control rails and 48 V solenoid drive in spot welders. IC Role / Device Role / Timing Role: Center-tapped doubler delivering isolated dual-polarity outputs without auxiliary winding. Use Value: Eliminates need for separate transformer taps or dual secondaries, reducing transformer size and cost in space-constrained welder control modules. |
| DC Power Module for CNC Controllers | High-Voltage DC Link in Battery Chargers |
Use Scenario: Supplies regulated ±15 V analog circuits and +5 V logic in CNC motion controller backplanes. IC Role / Device Role / Timing Role: Dual-rail rectifier enabling split-supply op-amp and comparator stages from single AC input. Use Value: RθJL = 2.5 °C/W allows direct PCB copper pour heatsinking - no discrete heatsink required in low-airflow CNC cabinets. | Use Scenario: Front-end rectification in 240 VAC-input EVSE Level 2 battery chargers feeding PFC stage. IC Role / Device Role / Timing Role: High-surge-capable bridge handling repeated connection/disconnection events during plug-in cycles. Use Value: 50 A IFSM rating ensures reliability across 10,000+ plug-in cycles without degradation under cold-start conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power center-tapped doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-2KBL100 | Same DO-205AB package, 2 A / 1000 V rating, but uses single-phase full-wave configuration (no center tap); requires external center-tap transformer. | Lacks integrated center-tap terminal - mandates transformer redesign for dual-rail generation. | Select only if transformer already includes center tap and board layout cannot accommodate S4KW2C-1P's 3-terminal footprint. |
| ON Semiconductor GBPC2010 | 4-terminal GBU package, 2 A / 1000 V, standard recovery, but configured as full-bridge - no center-tap output available. | Requires external voltage divider or regulator to derive split rails; adds component count and regulation loss. | Prefer when existing design uses GBU footprint and dual-rail generation is handled downstream via regulators. |
Compared with VS-2KBL100 and GBPC2010, the S4KW2C-1P uniquely integrates the center-tap node into the package, eliminating transformer or regulator dependencies for dual-rail generation - reducing BOM count and improving system-level efficiency in welder and CNC power modules.
Availability
S4KW2C-1P is available at Aetrix Electronics and suitable for industrial motor drives, resistance welders, and CNC controller power supplies requiring stable component supply, long-lifecycle support, and UL-recognized reliability.
Supply support for S4KW2C-1P 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
Semtech Corporation is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, power management, and protection devices for industrial, communications, and aerospace markets.
The S4KWx series was developed specifically for high-reliability, high-surge AC/DC front-end rectification in ruggedized industrial equipment where standard recovery performance, thermal robustness, and safety certification are prioritized over switching speed.
FAQ
What is the pin configuration of the S4KW2C-1P?
The S4KW2C-1P has three terminals in DO-205AB (TO-220AC) package: Terminal 1 is Anode 1, Terminal 2 is the Center Tap, and Terminal 3 is the Cathode. The metal tab is electrically connected to the Cathode and serves as both thermal path and electrical node. This configuration enables center-tapped doubler operation without external diodes or transformer modifications.
Does the S4KW2C-1P meet UL safety standards?
Yes, the S4KW2C-1P is UL Recognized under file E157185, confirming compliance with UL 60950-1 for insulation, flammability, and creepage/clearance requirements in industrial power supplies. This certification applies specifically to the S4KW2C-1P in its standard mounting configuration with recommended PCB pad layout and heatsinking.
What is the maximum junction temperature for the S4KW2C-1P?
The S4KW2C-1P has a maximum rated junction temperature of +175 °C. This allows sustained operation in high-ambient environments such as enclosed motor drive cabinets or welding equipment housings. Derating curves in the original Semtech datasheet specify allowable current reduction above +125 °C ambient when mounted on specified copper area.
Can the S4KW2C-1P replace a standard full-bridge rectifier?
No - the S4KW2C-1P is a center-tapped doubler, not a full-bridge. It provides two DC outputs (center tap and cathode) from two AC inputs, whereas a full-bridge requires four AC connections and delivers single-ended DC. Substitution would require circuit redesign, including transformer rewinding or addition of external diodes to replicate the doubler function.
What thermal management is required for the S4KW2C-1P at full load?
At 2 A average forward current and 1.1 V forward drop, the S4KW2C-1P dissipates ~2.2 W. With RθJL = 2.5 °C/W, junction-to-lead temperature rise is ~5.5 °C. To maintain TJ ≤ +175 °C at +70 °C ambient, a minimum 25 cm² 2-oz copper pour is recommended - no additional heatsink needed unless ambient exceeds +85 °C or surge duty cycle increases significantly.
S4KW2C-1P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Configuration:
- -
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- 2000 V
- Current - Average Rectified (Io) (per Diode):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 2 V @ 12 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 4 µA @ 2000 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
S4KW2C-1P FAQ
1.How can I place an order for S4KW2C-1P through Aetrix?
Please submit a Request for Quotation (RFQ) for S4KW2C-1P 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 S4KW2C-1P reliable?
The price and inventory of S4KW2C-1P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4KW2C-1P is usually 5 days.
3.What payment methods are accepted for S4KW2C-1P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4KW2C-1P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4KW2C-1P?
S4KW2C-1P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4KW2C-1P 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 S4KW2C-1P?
For technical support, including S4KW2C-1P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4KW2C-1P requirements.
6.How does Aetrix verify that S4KW2C-1P is sourced from the original manufacturer or authorized distributors?
All S4KW2C-1P 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 S4KW2C-1P meets industry standards.
7.What is the process for return or replacement of S4KW2C-1P?
All S4KW2C-1P units undergo pre-shipment inspection (PSI). If there is an issue with S4KW2C-1P, 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 S4KW2C-1P part is unused and in its original packaging.
Return procedure for S4KW2C-1P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S4KW2C-1P Tags
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