1. Executive Summary

In the field of high-voltage power supply design, German Diotec Semiconductor has long held a significant market share with its 2CL, BY, and DD series high-voltage diodes. However, as the global power electronics industry evolves toward higher power density and faster delivery response, engineers are facing dual challenges of "performance bottlenecks" and "supply chain rigidity."

This whitepaper analyzes the high-voltage diode technology system of HVC Components. HVC's multi-layer PN junction series technology and vacuum epoxy molding technology surpass Diotec standard products in voltage ratings (covering 20kV-1000kV) and surge current tolerance (up to 800A). With localized manufacturing, HVC achieves 20%-30% BOM cost reduction and 70% shorter lead times.

2. Industry Background: Three Major Pain Points in High-Voltage Rectifier Devices

In X-Ray generators, CT scanners, laser power supplies, and electrostatic coating equipment, high-voltage rectifier diodes serve as the "heart" of energy conversion. Current designs relying on single imported brands (such as Diotec) face the following systemic risks:

• Insufficient voltage margin: Traditional diode single-unit voltage rating is typically limited to 4kV-16kV. For applications requiring 100kV+, engineers must use extensive series connections, increasing PCB complexity and balancing resistor power consumption, reducing system MTBF.
• Weak surge resistance: During capacitor charging load startup, huge inrush currents often cause thermal breakdown of the diode PN junction. Standard products' lower I_FSM ratings force engineers to select oversized components.
• Supply chain vulnerability: Imported brands' 12-16 week lead times severely constrain downstream equipment mass production speed and after-sales maintenance response.

3. HVC Core Technology Analysis: Not Just Replacement, But an Upgrade

HVC's design philosophy is not simply "copying," but rather fundamental technological restructuring addressing the above pain points.

3.1 Wafer-Level Multi-Junction Series Technology

Compared to Diotec's standard process, HVC adopts deep trench isolation and glass passivation technology, vertically stacking and series-connecting multiple micro PN junctions at the wafer level.

• Ultra-high single-unit voltage rating: Single-unit voltage can reach 1000kV, significantly reducing series stages in ultra-high-voltage applications and minimizing equipment size.
• Avalanche breakdown characteristics: Some series feature controlled avalanche characteristics, dissipating energy non-destructively during reverse voltage spikes, allowing removal of bulky external MOV protection circuits.

3.2 Enhanced Thermal and Mechanical Characteristics

• High surge tolerance (I_FSM): Larger wafer area and optimized heat-dissipating lead frame provide forward surge current ratings ranging from 20A to 800A, improving surge resistance by 30%-50%.
• Vacuum molding packaging: All series use high-density vacuum epoxy encapsulation, eliminating partial discharge caused by internal air bubbles, supporting IP65 protection, suitable for air-cooled, oil-cooled, and SF6 environments.
• High-temperature resistant design: Maximum PN junction operating temperature (T_jmax) increased to 175°C, ensuring stable long-term operation in high-temperature oil tanks or high-power-density chassis.

4. Deep Comparison: HVC vs. Diotec Cross-Reference Guide

For consistency with the official website, the complete model cross-reference table is provided below:

5. Application Scenarios and Case Studies

5.1 Medical Imaging: X-Ray and CT Scanners

In medical equipment, diode reverse leakage current directly affects imaging quality.

• HVC Performance: Optimized wafer passivation process reduces reverse leakage current (I_R) at high temperatures by approximately 40%, resulting in smaller voltage multiplier circuit output ripple and improved imaging clarity.

5.2 Industrial Electrostatics: Coating and Dust Removal

This scenario requires devices that can withstand frequent arcing and short-circuit shocks.

• HVC Performance: Surge current tolerance up to 800A; electrostatic gun short-circuit moments are less likely to cause damage. After one customer switched, after-sales repair rate decreased by approximately 60%.

5.3 New Energy: Cable Testing and Withstand Voltage Testers

Portable equipment is sensitive to size and weight.

• HVC Performance: High-voltage silicon stacks use compact packaging, reducing weight by approximately 1.5kg compared to traditional oil-immersed solutions.

6. Supply Chain Strategy and Business Value

Beyond "technical benchmarking," HVC provides a more resilient supply chain solution:

7. Conclusions and Recommendations

Based on the above parameter comparisons and application cases, the conclusions are as follows:

• HVC HVD series comprehensively covers and surpasses Diotec products in electrical performance, packaging technology, surge tolerance, and supply chain flexibility.

Switching to HVC is the preferred choice for the following enterprises:

• Manufacturers facing imported component lead time issues and urgently needing stable supply sources.
• Enterprises seeking BOM cost reduction and enhancing end-product price competitiveness.
• R&D teams developing new high-voltage equipment requiring higher voltage ratings and smaller component sizes.

Copyright Notice: This document is proprietary to HVC Capacitor. Reproduction or use for commercial purposes without permission is prohibited.
Disclaimer: Technical parameters in this document are for reference only. Please refer to the latest data sheet for actual specifications.