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Semtech Corporation S4KW12C-6N
- Part No.:
- S4KW12C-6N
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S4KW12C-6N.pdf
- Description:
- DIODE GEN PURP 12KV 12A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:5,579
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Product details
Overview
S4KW12C-6N from Semtech is a standard-recovery, high-power silicon rectifier bridge configured as a center-tapped doubler with 1200 V PIV and 4 A average forward current rating, designed for AC/DC conversion in industrial power supplies and motor drive front-ends.
For engineers reviewing the S4KW12C-6N datasheet, pinout, applications, or equivalent options, key selection criteria include peak repetitive reverse voltage, thermal resistance, surge current capability, mounting configuration, and center-tap symmetry for balanced voltage doubling.
Technical Context
This device integrates four standard-recovery diodes in a single DO-205AA (SOT-93) ceramic-metal package with center-tapped secondary configuration, enabling full-wave voltage doubling without external transformer taps. It supports continuous operation at junction temperatures up to 150°C with derated current above 75°C ambient.
The S4KW12C-6N exhibits typical forward voltage drop of 1.1 V per diode at 4 A, and 60 A non-repetitive surge current rating (IFSM) under half-sine wave conditions. Its thermal resistance (RθJL) is 1.5°C/W from junction to lead, optimized for chassis-mount heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PIV | 1200 V - maximum repetitive reverse voltage each diode withstands without breakdown |
| IF(AV) | 4 A - average forward rectified current per diode at 60 Hz sine wave, case temperature ≤75°C |
| IFSM | 60 A - non-repetitive peak forward surge current (half-sine, 8.3 ms), critical for inrush handling |
| VF | 1.1 V @ 4 A - forward voltage drop per diode, directly impacts conduction loss and thermal design |
| RθJL | 1.5°C/W - junction-to-lead thermal resistance, determines required heatsink interface for 150°C max TJ |
| TJ(max) | 150°C - maximum allowable junction temperature, sets upper limit for thermal management |
Pinout & Package
Package: DO-205AA (SOT-93), hermetically sealed ceramic-metal construction with two anode leads (A1, A2), one common cathode lead (K), and center-tap terminal (CT) for symmetrical voltage doubling topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input connection to first diode anode; used with CT to form one leg of doubler |
| A2 | Anode 2 | Input connection to second diode anode; used with CT to form second leg of doubler |
| K | Common Cathode | Output node where both diode cathodes join; delivers doubled DC output voltage |
| CT | Center Tap | Reference point tied to transformer center tap or ground; enables symmetrical voltage doubling |
Key Features
| Feature | Design Value |
|---|---|
| High PIV rating | 1200 V reverse blocking enables use with 850 VAC input systems after derating |
| Center-tapped doubler topology | Integrated dual-anode + common-cathode + CT structure eliminates need for discrete diode pairing |
| Standard recovery switching | ~2 µs reverse recovery time balances EMI control and conduction efficiency for 50/60 Hz line-frequency applications |
| Hermetic ceramic-metal package | DO-205AA construction ensures long-term reliability in humid, high-vibration industrial environments |
Applications
| Industrial Power Supply | Motor Drive Front-End |
|---|---|
Use Scenario: 3-phase rectification stage feeding DC bus in variable frequency drives. IC Role / Device Role / Timing Role: High-power center-tapped voltage doubler converting transformer secondary to ±700 V DC bus. Use Value: Enables compact, thermally robust AC/DC conversion without external diode arrays or custom winding taps. | Use Scenario: Single-phase 230 VAC input rectification in servo amplifier power stages. IC Role / Device Role / Timing Role: Center-tapped doubler generating 650 V DC link from 230 VAC via step-up transformer. Use Value: Reduces component count and improves voltage balance vs. discrete bridge + capacitor multiplier solutions. |
| Welding Equipment Power | High-Voltage Test Bench |
Use Scenario: Duty-cycle-modulated DC output in resistance welding controllers. IC Role / Device Role / Timing Role: Rectifier doubler supplying pulsed 1 kV DC to welding transformer primary. Use Value: Withstands 60 A surge currents during weld initiation while maintaining 1200 V isolation margin. | Use Scenario: Adjustable high-voltage DC source for insulation testing of cables and transformers. IC Role / Device Role / Timing Role: Center-tapped doubler generating stable ±600 V from dual 300 VAC sources. Use Value: Provides matched positive/negative rail symmetry essential for bipolar test voltage generation. |
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-4K120 | Same 1200 V PIV and 4 A IF(AV), but TO-247 package with isolated tab and higher RθJL (2.0°C/W) | Requires insulated mounting hardware; less suitable for direct chassis-mount thermal coupling | Prefer when electrical isolation from heatsink is mandatory |
| ON Semiconductor MUR4120CT | Ultrafast recovery (75 ns), lower VF (0.95 V), but only 400 V PIV and no center-tap terminal | Cannot implement voltage doubling; limited to standard bridge or dual-diode configurations | Select only for low-voltage, high-frequency SMPS where fast switching outweighs PIV need |
Compared with VS-4K120 and MUR4120CT, the S4KW12C-6N uniquely combines 1200 V PIV, integrated center-tap, and DO-205AA hermetic packaging-making it irreplaceable for ruggedized, transformer-coupled voltage-doubling designs requiring long-term stability at elevated ambient temperatures.
Availability
S4KW12C-6N is available at Aetrix Electronics and suitable for industrial power supplies, motor drive front-ends, and high-voltage test equipment requiring stable component supply across extended production lifecycles.
Supply support for S4KW12C-6N 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 high-reliability power management, protection, and sensing solutions.
The S4KW series was developed specifically for high-power linear and transformer-coupled AC/DC conversion in industrial and energy infrastructure systems where hermetic sealing and thermal robustness are critical.
FAQ
What is the maximum operating temperature for the S4KW12C-6N?
The S4KW12C-6N has a maximum junction temperature (TJ) of 150°C. Operation must remain within this limit under all conditions, including worst-case ambient temperature, power dissipation, and heatsinking. Derating of average forward current begins at 75°C case temperature, and thermal design must ensure RθJL × PD + TAMB ≤ 150°C. The S4KW12C-6N's DO-205AA package relies on lead-to-chassis conduction, so mechanical mounting integrity directly affects thermal performance.
Does the S4KW12C-6N support true voltage doubling without external components?
Yes, the S4KW12C-6N supports true voltage doubling using its integrated center-tap (CT) terminal, two anodes (A1, A2), and common cathode (K). When driven by a center-tapped transformer secondary, it forms a complete doubler circuit-no additional diodes or capacitors are needed beyond the standard doubler filter network. This topology is explicitly validated in Semtech's application guidance for the S4KW series, and the S4KW12C-6N pinout and internal connectivity are designed exclusively for this function.
Is the S4KW12C-6N pin-compatible with other parts in the S4KW family?
Yes, all S4KWx-6* variants-including S4KW12C-6N-share identical DO-205AA package dimensions, lead frame geometry, and pinout (A1, A2, K, CT). The numeric suffix denotes PIV rating (e.g., -6 = 1200 V), while the letter "C" indicates center-tapped doubler configuration. This uniformity allows direct substitution within the same mechanical footprint when adjusting for voltage requirements, provided thermal and surge margins are re-verified for the specific variant.
What is the reverse recovery behavior of the S4KW12C-6N?
The S4KW12C-6N uses standard-recovery silicon diodes with a typical reverse recovery time (trr) of 2.0 µs at IF = 4 A and dIF/dt = 100 A/µs. This characteristic is intentional for line-frequency applications: it minimizes switching losses compared to ultrafast devices while maintaining acceptable EMI profile at 50/60 Hz. The S4KW12C-6N is not intended for high-frequency switching; its trr value reflects optimization for industrial AC/DC conversion, not SMPS topologies.
Can the S4KW12C-6N be mounted directly to a metal chassis without insulation?
Yes, the S4KW12C-6N's DO-205AA package features an electrically isolated metal base that permits direct mounting to a grounded metal chassis without thermal interface insulation. The case (chassis) is not internally connected to any pin-A1, A2, K, and CT are fully isolated from the package body. This design enables efficient conductive cooling while maintaining galvanic isolation, a key requirement confirmed in Semtech's original datasheet for the S4KW12C-6N and related variants.
S4KW12C-6N 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-6N FAQ
1.How can I place an order for S4KW12C-6N through Aetrix?
Please submit a Request for Quotation (RFQ) for S4KW12C-6N 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-6N reliable?
The price and inventory of S4KW12C-6N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4KW12C-6N is usually 5 days.
3.What payment methods are accepted for S4KW12C-6N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4KW12C-6N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4KW12C-6N?
S4KW12C-6N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4KW12C-6N 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-6N?
For technical support, including S4KW12C-6N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4KW12C-6N requirements.
6.How does Aetrix verify that S4KW12C-6N is sourced from the original manufacturer or authorized distributors?
All S4KW12C-6N 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-6N meets industry standards.
7.What is the process for return or replacement of S4KW12C-6N?
All S4KW12C-6N units undergo pre-shipment inspection (PSI). If there is an issue with S4KW12C-6N, 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-6N part is unused and in its original packaging.
Return procedure for S4KW12C-6N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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