会社ブログについて Wolfspeed C4D20120H High Efficiency 1200V 20A Silicon Carbide Schottky Diode

Shenzhen Mingjiada Electronics Co., Ltd. supplies the Wolfspeed C4D20120H high-efficiency 1200V 20A silicon carbide Schottky diode.

I. C4D20120H Product Details
1. C4D20120H Description
The C4D20120H is Wolfspeed’s fourth-generation MPS-structure silicon carbide (SiC) Schottky diode, an industrial-grade discrete SiC rectifier device housed in a TO‑247‑2 package, developed by Wolfspeed specifically for high-frequency, high-efficiency power conversion systems. Compared to traditional silicon fast-recovery diodes, this device features near-zero reverse recovery charge, significantly reduced switching losses and supports higher operating frequencies. It helps power supply equipment achieve higher power density and reduce thermal management footprint, making it suitable for high-voltage power topologies such as photovoltaic energy storage, industrial power supplies and UPS systems. The MPS hybrid structure offers greater surge immunity and higher reliability than standard Schottky diodes, making it suitable for long-term continuous operation.

2. C4D20120H Key Specifications
- Brand: Wolfspeed
- Model: C4D20120H
- Device type: Fourth-generation SiC MPS Schottky diode
- Reverse breakdown voltage VRRM: 1200V
- Forward average current IF: 20A
- Typical forward voltage drop (VF): 1.5 V
- Typical reverse recovery charge (Qrr): 99 nC
- Package: TO‑247‑2
- Maximum junction temperature (Tj): 175 °C
- Packaging: Tube
- Grade: Industrial grade

3. C4D20120H Product Features
1. Virtually zero reverse recovery current, with no significant reverse recovery loss; switching behaviour is virtually unaffected by temperature
2. Forward voltage drop exhibits a positive temperature coefficient; current distribution is balanced when multiple devices are connected in parallel, ensuring good parallel stability
3. MPS composite structure, combining the low on-resistance of a Schottky diode with the excellent surge robustness of a PiN diode
4. Supports high-frequency switching operation and can be combined with SiC MOSFETs to form high-performance power loops
5. The TO‑247‑2 package offers ample creepage distance, ensuring good insulation safety under high-voltage conditions
6. Wide operating temperature range with stable loss characteristics at high temperatures, making it suitable for enclosed equipment with limited heat dissipation

4. Product Advantages of the C4D20120H
At the system level, replacing silicon-based fast-recovery diodes results in a significant reduction in switching losses, improved overall conversion efficiency, and the ability to reduce heat sink size, thereby achieving higher power density. It offers greater design flexibility for high-frequency applications, allowing for a reduction in the size of passive components such as transformers and inductors, thereby lowering BOM costs. The device produces lower switching noise, making EMI suppression easier and simplifying the overall electromagnetic compatibility design of the system. Its positive temperature coefficient (PTC) characteristic reduces the risk of current imbalance in parallel configurations, facilitating power rating expansion through the parallel connection of multiple devices. With strong high-temperature tolerance, it is suitable for harsh industrial environments, offering a lower failure rate during long-term operation and extending the service life of the equipment.

5. Typical Application Scenarios for the C4D20120H
PFC boost diodes in photovoltaic inverters; freewheeling diodes in DC–DC converters; industrial switching power supplies (SMPS), uninterruptible power supplies (UPS) and auxiliary power supplies; power conversion systems (PCS) for energy storage and power units for charging points; freewheeling circuits in motor drive inverters; suitable for power conversion solutions in automated equipment.

II. C4D20120H Buyer’s Guide
1. Key Points for Selection and Verification
Prioritise confirming the system bus voltage and peak reverse voltage, allowing for voltage derating; for 1200V devices, it is recommended that the operating bus voltage does not exceed 800V for prolonged periods; calculate the average current and peak inrush current, whilst also paying attention to switching losses at high frequencies—do not rely solely on the DC rated current; Confirm that the TO‑247‑2 package is compatible with the PCB pads and heat sink mounting holes; verify the operating ambient temperature and evaluate the thermal management solution to ensure the junction temperature does not exceed 175°C; prioritise pairing with Wolfspeed SiC MOSFETs from the same platform to ensure matching drive and switching characteristics.

2. Recommendations for Sample and Bulk Procurement
During the R&D phase, prioritise requesting samples to conduct preliminary testing, including dual-pulse, thermal resistance, temperature rise and EMI tests; during the small-batch trial production phase, lock in the batch and retain the datasheet and original manufacturer’s test reports; for large-volume orders, it is recommended to sign a stock-keeping framework agreement to lock in delivery times and prices, thereby mitigating the risk of fluctuations in Wolfspeed’s SiC production capacity; simultaneously, set aside alternative model options, such as the C4D30120H from the same series, to address future requirements for increased production volume and power output.

3. Mitigating Quality Risks
Reject devices that have been disassembled, refurbished, or sanded and re-marked; require suppliers to provide the original manufacturer’s batch number, Certificate of Conformity (COC) and traceability information; upon receipt, carry out spot checks on appearance, leads and silkscreen, paying particular attention to the clarity of the silkscreen and whether there are any signs of sanding on the package; where conditions permit, conduct spot checks on electrical parameters such as breakdown voltage (VF), leakage current and reverse withstand voltage.

4. Storage and Handling Precautions
SiC power devices are electrostatic-sensitive; anti-static wrist straps must be worn and anti-static trays used throughout handling. Storage environments must have controlled temperature and humidity to prevent pin oxidation. Soldering temperature profiles must strictly adhere to the datasheet to prevent chip damage from overheating. During assembly, thermal grease must be evenly applied to the heat sink contact surface to ensure unobstructed thermal pathways.

III. Shenzhen Mingjiada’s Advantages in Electronic Component Supply and Detailed Process
[Core Supply Advantages]
1. Guarantee of Genuine, Original Products
With deep roots in first-tier semiconductor channels, we provide a stable supply of products from numerous brands. All chips are original factory-sealed products with traceable batch numbers. Each item undergoes a full inspection upon entry into stock, verifying silkscreen markings, packaging and batch information. We strictly control the risks of refurbished, loose new or counterfeit goods, and can provide original manufacturer documentation and dispatch inspection certificates upon request.
2. Dual-Warehouse Stock, Efficient Delivery
Our integrated dual-warehouse system in Shenzhen and Hong Kong maintains a vast inventory of stock, covering categories such as power devices, MCUs, signal chain chips, RF components, memory and sensors. We support sample orders from as little as one piece, small-batch trial production and full-volume order fulfilment. Standard stock orders are delivered within 1–3 days, whilst urgent requirements are prioritised for dispatch and sent directly in anti-static vacuum packaging, catering to urgent R&D needs and emergency production line shortages.
3. One-Stop BOM Procurement Capabilities
We support one-stop order fulfilment based on customers’ complete BOM lists, reducing the communication costs associated with liaising with multiple suppliers. With unified delivery schedules and consolidated invoicing, this service is ideal for the procurement of complete solutions for server power supplies, energy storage, industrial automation and humanoid robots.
4. Competitive Pricing and Flexible Solutions
Leveraging the advantages of long-term, large-scale channel procurement, we offer tiered pricing with clear price gradients for samples, trial production and mass production; We support long-term price-lock agreements and framework contracts to hedge against fluctuations in chip prices; our technical team can assist engineers with component selection, comparisons and alternative recommendations, provide basic application guidance for components, and help reduce solution costs.
5. Rigorous Quality Control and After-Sales Support
We have established a dual quality control process comprising incoming inspection and outgoing verification, with particular focus on verifying electrical parameters, appearance and packaging integrity for power devices; shipments utilise anti-static packaging and comply with standardised logistics procedures; We have established a quality and after-sales mechanism; any quality issues originating from the manufacturer will be handled in accordance with the agreement. We also support customers in signing Non-Disclosure Agreements (NDAs) to protect project and solution information.

【Standard Procurement Process】
1. Submission of Quotation Request
The customer provides complete component part numbers, required quantities, expected lead times and whether prices are inclusive of tax; it is preferable to include a Bill of Materials (BOM). The account manager will promptly check stock levels and provide feedback on availability, lead times and tiered pricing.
2. Confirmation of Proposal and Commercial Coordination
Both parties confirm prices, lead times, quality terms and logistics methods; where required, an NDA and a framework supply agreement are drafted simultaneously.
3. Order Placement, Stock Preparation and Re-inspection
The client places an order; Mingjiada’s warehouse management team retrieves the stock, whilst the quality control department re-inspects the appearance, packaging and batch information of the materials, with particular attention paid to the original packaging condition of power devices.
4. Packing and Dispatch
Goods are packed using anti-static bags and moisture-proof vacuum packaging, and dispatched via SF Express or cross-border logistics services, accompanied by a delivery note and batch documentation; goods from the Hong Kong warehouse can be arranged for customs clearance upon import.
5. Receipt Inspection and After-Sales Service
The client carries out a quality inspection upon receipt of the goods; any quality concerns arising during the normal service life may be reported promptly, with a dedicated representative following up on the matter; ongoing coordination is maintained for subsequent restocking and the inclusion of new models in orders.