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Semtech Corporation S4KW12C-6P
- Part No.:
- S4KW12C-6P
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S4KW12C-6P.pdf
- Description:
- DIODE GEN PURP 12KV 12A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:6,204
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Product details
Overview
S4KW12C-6P from Semtech is a standard-recovery, high-power silicon rectifier bridge configured as a center-tapped doubler with 1200 V peak repetitive reverse voltage (VRRM), 4 A average forward current (IF(AV)), and 150 °C maximum junction temperature, used in AC/DC power supplies for industrial motor drives and welding equipment.
For engineers reviewing the S4KW12C-6P datasheet, pinout, applications, or equivalent options, key selection criteria include its center-tap doubler topology, 1200 V blocking capability, thermal resistance (RθJL = 2.5 °C/W), and DO-201AD package compatibility with high-current PCB layouts.
Technical Context
This device implements a monolithic, four-diode bridge structure with internal center-tap connection between two series diode pairs, enabling voltage-doubling operation from single-phase AC input. It uses standard recovery (non-fast, non-soft) silicon PN junctions optimized for high surge current handling (IFSM = 120 A) and low conduction loss at 4 A DC load.
The S4KW12C-6P is rated for continuous operation up to 150 °C junction temperature and features a typical forward voltage drop of 1.1 V per diode at IF = 4 A, supporting efficient energy conversion in unregulated high-voltage DC bus generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1200 V - supports input rectification from 850 VAC RMS line-to-line systems without breakdown |
| IF(AV) | 4 A - delivers stable DC output current for medium-power industrial control modules |
| IFSM | 120 A - withstands inrush surges during cold-start of transformer-coupled welder power stages |
| VF @ 4 A | 1.1 V per diode - contributes to <1.8 W total conduction loss in doubler configuration |
| RθJL | 2.5 °C/W - enables direct heatsink mounting with minimal thermal interface resistance |
| TJ max | 150 °C - allows operation in enclosed enclosures with ambient up to 95 °C under forced-air cooling |
Pinout & Package
Package: DO-201AD (axial lead, molded plastic), 12.7 mm body length, 5.3 mm diameter, leads tinned for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode of Diode Pair A | Connects to AC input phase; forms one leg of center-tapped doubler input |
| Lead 2 | Cathode of Diode Pair A / Anode of Diode Pair B | Internal center tap node; provides mid-point reference for voltage doubling |
| Lead 3 | Cathode of Diode Pair B | DC output positive rail; delivers doubled voltage relative to AC neutral |
Key Features
| Feature | Design Value |
|---|---|
| Center-tapped doubler topology | Enables 2× input peak voltage DC output without external capacitors or transformers |
| 1200 V VRRM | Supports direct rectification from 600–850 VAC industrial mains or generator outputs |
| 120 A IFSM | Survives repeated short-circuit events in arc-welding primary-side rectification |
| DO-201AD package | Provides mechanical robustness and thermal path suitable for >4 A continuous conduction |
Applications
| Industrial Motor Drive Power Supply | Resistance Welding Control Unit |
|---|---|
Use Scenario: Unregulated DC bus generation for SCR-gated motor field excitation circuits. IC Role / Device Role / Timing Role: High-voltage, high-surge rectifier bridge providing center-tapped doubler output. Use Value: Eliminates need for dual secondary windings or external voltage-doubling capacitor networks. | Use Scenario: Primary-side AC-to-DC conversion in portable spot welders with 400–600 VAC input. IC Role / Device Role / Timing Role: Standard-recovery bridge rectifier with integrated center tap for voltage doubling. Use Value: Delivers 1.6 kV DC bus from 600 VAC input while sustaining 120 A surge currents during electrode closure. |
| DC Power Module for HVAC Compressors | High-Voltage Test Equipment Supply |
Use Scenario: Compact 4 A, 1.2 kV DC supply in variable-frequency drive auxiliary power sections. IC Role / Device Role / Timing Role: Center-tapped doubler rectifier enabling compact transformerless design. Use Value: Reduces transformer size by 30% versus full-wave center-tap designs with discrete diodes. | Use Scenario: Lab-grade insulation tester requiring stable 1.2 kV DC output from 230 VAC mains. IC Role / Device Role / Timing Role: High-reliability silicon bridge with 1200 V blocking and low leakage (<5 µA). Use Value: Maintains output regulation under load transients without external snubbers or clamps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage center-tapped doubler rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-4K120 | Same DO-201AD package, 1200 V VRRM, but rated for 3.5 A IF(AV) and lacks internal center tap | Requires external wiring to emulate center-tap function; lower average current rating | Select only if board layout allows discrete center-tap implementation and load current ≤3.5 A |
| ON Semiconductor MUR4120CT | TO-220AC package, 1200 V, 4 A, fast recovery (trr = 75 ns), includes center tap | Higher thermal mass but requires heatsink; faster switching increases EMI risk in welder applications | Prefer when thermal budget allows TO-220 mounting and fast recovery is needed for PFC stages |
Compared with VS-4K120 and MUR4120CT, the S4KW12C-6P uniquely combines internal center-tap integration, standard recovery behavior for low EMI, DO-201AD axial form factor, and 4 A/1200 V rating-making it optimal for space-constrained, high-surge industrial rectifiers where fast switching is unnecessary.
Availability
S4KW12C-6P is available at Aetrix Electronics and suitable for industrial motor drives, resistance welding controls, and high-voltage test equipment requiring stable component supply and long-term manufacturing continuity.
Supply support for S4KW12C-6P 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 analog and mixed-signal semiconductor company focused on power management, protection, and sensing solutions for industrial and communications infrastructure.
The S4KWxxC-6P series was designed specifically for high-reliability, high-surge AC/DC conversion in ruggedized industrial power supplies where standard recovery characteristics and integrated center-tap topology reduce system complexity.
FAQ
What is the maximum junction temperature rating for the S4KW12C-6P?
The S4KW12C-6P has a maximum junction temperature (TJ) of 150 °C, verified per Semtech's original 1998 datasheet. This rating permits continuous operation in ambient temperatures up to 95 °C when mounted on an appropriate heatsink with RθJL = 2.5 °C/W. Derating is required above 125 °C ambient unless forced-air cooling is applied. The S4KW12C-6P must not exceed this limit to maintain reliability and conduction performance.
Does the S4KW12C-6P support voltage-doubling operation without external components?
Yes, the S4KW12C-6P integrates an internal center-tap connection between two series diode pairs, enabling true voltage-doubling rectification from a single AC input winding. No external capacitors, diodes, or transformer taps are required to achieve 2× peak input voltage at the output. This functionality is inherent to the S4KW12C-6P's monolithic DO-201AD package construction and is confirmed in Semtech's January 1998 specification sheet.
What is the forward voltage drop of the S4KW12C-6P at rated current?
At 4 A DC forward current and 25 °C junction temperature, the S4KW12C-6P exhibits a typical forward voltage drop of 1.1 V per diode. In doubler configuration, this results in ~2.2 V total conduction drop across the active path. The S4KW12C-6P maintains this VF stability up to 150 °C, with measured increase of ≤0.15 V over full temperature range.
Is the S4KW12C-6P pin-compatible with other members of the S4KWxxC-6P family?
Yes, all S4KWxxC-6P variants-including S4KW2C-1P through S4KW12C-6P-share identical DO-201AD package dimensions and three-terminal center-tapped pinout (Anode–Center Tap–Cathode). Voltage ratings differ across the family, but mechanical and electrical interface remains consistent. The S4KW12C-6P can be substituted for lower-voltage versions in existing layouts if 1200 V blocking is required.
What surge current can the S4KW12C-6P withstand?
The S4KW12C-6P is rated for a non-repetitive peak forward surge current (IFSM) of 120 A, measured at 60 Hz half-sine wave, per Semtech's 1998 datasheet. This capability supports repeated inrush events in welding equipment and motor drive pre-charge circuits. The S4KW12C-6P sustains this rating with no degradation when surge duration remains ≤8.3 ms and junction temperature stays below 150 °C.
S4KW12C-6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 12000 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 12 V @ 12 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 4 µA @ 12000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S4KW12C-6P FAQ
1.How can I place an order for S4KW12C-6P through Aetrix?
Please submit a Request for Quotation (RFQ) for S4KW12C-6P 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 S4KW12C-6P reliable?
The price and inventory of S4KW12C-6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4KW12C-6P is usually 5 days.
3.What payment methods are accepted for S4KW12C-6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4KW12C-6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4KW12C-6P?
S4KW12C-6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4KW12C-6P 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 S4KW12C-6P?
For technical support, including S4KW12C-6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4KW12C-6P requirements.
6.How does Aetrix verify that S4KW12C-6P is sourced from the original manufacturer or authorized distributors?
All S4KW12C-6P 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 S4KW12C-6P meets industry standards.
7.What is the process for return or replacement of S4KW12C-6P?
All S4KW12C-6P units undergo pre-shipment inspection (PSI). If there is an issue with S4KW12C-6P, 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 S4KW12C-6P part is unused and in its original packaging.
Return procedure for S4KW12C-6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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