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Semtech Corporation S4KW4C-2P
- Part No.:
- S4KW4C-2P
- Manufacturer:
- Semtech Corporation
- Category:
- Diode Arrays
- Package:
- Module
- Datasheet:
-
S4KW4C-2P.pdf
- Description:
- DIODE MODULE 4000V 12A
- Quantity:
- Payment:
- Shipping:
Inventory:7,446
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Product details
Overview
S4KW4C-2P from Semtech is a standard-recovery, high-power silicon rectifier bridge configured as a center-tapped doubler with 4-pin DO-205AA (SOT-93) package, rated for 400V PIV, 4A average forward current, and 150°C junction temperature, used in AC/DC power supplies for industrial motor drives.
For engineers reviewing the S4KW4C-2P datasheet, pinout, applications, or equivalent options, key selection criteria include peak repetitive reverse voltage, thermal resistance, surge current capability, and center-tap symmetry for dual-output DC generation.
Technical Context
This device integrates two series-connected diode pairs sharing a common cathode and center-tapped anode configuration, enabling full-wave voltage doubling without external transformer taps. It supports continuous conduction mode operation with 1.1V typical forward voltage at 4A and exhibits 50µA maximum reverse leakage at 400V and 25°C.
The S4KW4C-2P uses planar passivated junctions for stable performance across -65°C to +150°C ambient, and its glass-passivated chip construction ensures robust surge immunity up to 120A non-repetitive peak forward current (IFSM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PIV Rating | 400V - Maximum reverse voltage each diode section withstands before breakdown; defines safe AC input range for 230VAC systems with margin. |
| IF(AV) | 4A - Average forward current per diode path; determines continuous DC output capability in regulated power supplies. |
| VF @ 4A | 1.1V - Forward voltage drop at rated current; directly impacts conduction loss and thermal design of heatsink. |
| IFSM | 120A - Non-repetitive surge current; enables survival during cold-start inrush into capacitive loads. |
| RθJA | 25°C/W - Junction-to-ambient thermal resistance on FR-4 PCB with 1 sq-in copper pad; sets minimum heatsinking requirement. |
| TJ Max | 150°C - Maximum allowable junction temperature; constrains derating curve above 70°C ambient. |
Pinout & Package
Package: DO-205AA (SOT-93), hermetically sealed ceramic-metal case with center-tapped anode configuration and isolated cathodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input anode of first diode leg | Connects to one end of center-tapped transformer secondary; forms half of doubler input path. |
| Anode 2 (A2) | Input anode of second diode leg | Connects to opposite end of center-tapped transformer secondary; completes symmetrical AC input interface. |
| Cathode (K) | Common cathode output node | Delivers doubled DC voltage output; requires low-impedance filtering capacitor connection. |
| Center Tap (CT) | Shared anode reference point | Provides ground or bias reference for split-rail outputs; must be connected to circuit common. |
Key Features
| Feature | Design Value |
|---|---|
| Standard recovery switching | Enables use in line-frequency (50/60Hz) rectification without snubbers or ringing concerns. |
| Center-tapped doubler topology | Generates ±VDC or 2×VAC-peak output from single center-tapped transformer winding. |
| 150°C maximum junction temperature | Supports operation in high-ambient environments like enclosed industrial enclosures or motor control cabinets. |
| 120A non-repetitive surge rating | Withstands repeated cold-start surges in motor drive DC bus charging applications. |
Applications
| Industrial Motor Drive Power Supply | Welding Equipment DC Bus |
|---|---|
Use Scenario: Converting 230VAC transformer output to 600VDC bus for IGBT gate drivers and control logic. IC Role / Device Role / Timing Role: High-current rectifier bridge providing isolated, doubled DC voltage with center-tap reference for auxiliary rails. Use Value: Eliminates need for dual-secondary transformer; reduces component count and improves reliability over discrete diode solutions. | Use Scenario: Rectifying high-current AC from welding transformer to charge large electrolytic banks for arc initiation. IC Role / Device Role / Timing Role: Center-tapped doubler delivering stable 2×VAC-peak DC with surge tolerance during arc strike events. Use Value: 120A IFSM rating prevents failure during repeated short-circuit weld cycles. |
| Test Equipment Dual-Polarity Supply | Industrial PLC Power Module |
Use Scenario: Generating ±15V and ±5V analog supply rails from a single 12VAC center-tapped winding. IC Role / Device Role / Timing Role: Symmetric doubler enabling independent positive/negative rail regulation without cross-coupling. Use Value: Tight center-tap matching ensures balanced ripple rejection and reduced common-mode noise in precision measurement circuits. | Use Scenario: Providing isolated 24VDC control power and 5V logic rail from 115VAC mains via compact transformer. IC Role / Device Role / Timing Role: Primary rectifier stage converting transformer output to unregulated DC for downstream buck converters. Use Value: 4A IF(AV) and 25°C/W RθJA support continuous operation in fanless PLC chassis with 70°C ambient. |
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-4KHC04-M3 | Same DO-205AA package, 400V PIV, but 4.5A IF(AV) and 1.25V VF @ 4A. | Higher current rating suits higher-load designs; slightly higher conduction loss affects thermal budget. | Select when >4A average load or tighter thermal margin is required; verify layout compatibility with 0.5mm lead pitch difference. |
| ON Semiconductor GBPC404 | GBU-4K package (larger), 400V PIV, 4A IF(AV), but single-phase bridge-not center-tapped doubler topology. | Requires external center-tap transformer wiring; lacks integrated CT terminal for simplified layout. | Choose only if redesigning transformer interface is acceptable; not a direct functional replacement for S4KW4C-2P's doubler architecture. |
Compared with VS-4KHC04-M3 and GBPC404, the S4KW4C-2P uniquely integrates center-tap functionality in a compact DO-205AA package, reducing transformer complexity and PCB space-critical for retrofit or space-constrained industrial power modules.
Availability
S4KW4C-2P is available at Aetrix Electronics and suitable for industrial motor drives, welding equipment, test instrumentation, and PLC power modules requiring stable component supply and long-term manufacturability.
Supply support for S4KW4C-2P 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 and communications markets.
The S4KWxC series was designed specifically for high-reliability, high-current AC/DC conversion in ruggedized power supplies where transformer integration, thermal resilience, and surge robustness are critical.
FAQ
What is the maximum operating temperature for the S4KW4C-2P?
The S4KW4C-2P has a maximum junction temperature (TJ) of 150°C and is rated for operation from -65°C to +150°C. Its thermal resistance (RθJA) is 25°C/W on standard FR-4 PCB with 1 sq-in copper, meaning ambient temperature must be limited to ≤70°C at full 4A load to maintain safe junction temperature. Derating curves apply above this ambient threshold.
Does the S4KW4C-2P support voltage doubling without external components?
Yes, the S4KW4C-2P integrates a center-tapped doubler configuration internally. When connected to a center-tapped transformer secondary, it delivers approximately 2×VAC-peak DC output between Cathode (K) and Center Tap (CT) terminals without additional diodes or passive components-enabling compact, high-efficiency AC/DC conversion in space-constrained designs.
What is the surge current rating of the S4KW4C-2P and how is it applied?
The S4KW4C-2P is rated for 120A non-repetitive peak forward surge current (IFSM) per diode leg. This rating applies to single half-cycle surges at 60Hz, such as inrush into bulk capacitors during power-up. It is not intended for repetitive duty; repeated exposure above 10A RMS requires verification against thermal cycling limits in the S4KW4C-2P datasheet.
Can the S4KW4C-2P replace a discrete four-diode center-tapped doubler?
Yes-the S4KW4C-2P replaces four discrete 1N5408 or similar diodes in a center-tapped doubler configuration. Its monolithic construction ensures matched forward voltage and thermal tracking between legs, improving output balance and reliability. Layout simplifies to three connections (A1, A2, CT) plus K, eliminating four discrete packages and associated routing.
Is the S4KW4C-2P RoHS compliant?
The S4KW4C-2P was manufactured prior to RoHS enforcement timelines and does not meet current EU RoHS Directive 2011/65/EU requirements due to lead content in solder and internal terminations. For new designs requiring RoHS compliance, consult Semtech's modern equivalents or contact Aetrix Electronics for qualified drop-in alternatives with full compliance documentation.
S4KW4C-2P 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):
- 4000 V
- Current - Average Rectified (Io) (per Diode):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 4 V @ 12 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 4 µA @ 4000 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
S4KW4C-2P FAQ
1.How can I place an order for S4KW4C-2P through Aetrix?
Please submit a Request for Quotation (RFQ) for S4KW4C-2P 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 S4KW4C-2P reliable?
The price and inventory of S4KW4C-2P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4KW4C-2P is usually 5 days.
3.What payment methods are accepted for S4KW4C-2P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4KW4C-2P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4KW4C-2P?
S4KW4C-2P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4KW4C-2P 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 S4KW4C-2P?
For technical support, including S4KW4C-2P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4KW4C-2P requirements.
6.How does Aetrix verify that S4KW4C-2P is sourced from the original manufacturer or authorized distributors?
All S4KW4C-2P 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 S4KW4C-2P meets industry standards.
7.What is the process for return or replacement of S4KW4C-2P?
All S4KW4C-2P units undergo pre-shipment inspection (PSI). If there is an issue with S4KW4C-2P, 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 S4KW4C-2P part is unused and in its original packaging.
Return procedure for S4KW4C-2P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S4KW4C-2P Tags
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BAV99,215
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BAT54SLT1G
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
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MMBD1503-TP
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BAV99WT1G
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