I. Introduction

Military electronic equipment demands stringent requirements for component reliability and environmental adaptability. High-voltage and high-temperature resistant solid-state capacitors are core components in high-power power supplies, shipborne radar, and missile-borne power supplies.

Currently, China relies heavily on imports for high-end military-grade solid-state capacitors, resulting in long delivery cycles, high costs, and unstable supply chains, hindering equipment development and mass production.

Shanghai Yongming has obtained GJB9001 military quality management system certification and, leveraging its self-developed processes, has launched two types of military-grade solid-state capacitors: high-voltage and high-temperature resistant, achieving domestic substitution for imported components.

II. Three Core Pain Points in Military Applications

Supply Chain Risk: Imported brands have delivery times exceeding 6 months, and price fluctuations can easily lead to project delays, non-compliance with acceptance standards, and hefty fines.

Insufficient Operating Performance: Ordinary capacitors age rapidly and degrade in capacity at 125℃. High ESR in high-voltage circuits exacerbates heat generation and reduces efficiency, making them unsuitable for wide-temperature (150℃) and 400V high-voltage operating conditions.

Structural and Low-Temperature Defects: Traditional capacitors are large, limiting device miniaturization; ESR spikes sharply at -55℃, easily causing power supply startup failure, and severe parameter drift in extreme environments.

III. Introduction to Yongming Military-Grade Solid-State Capacitors

(I) High-Voltage Series: CDNPH (Leaded Type) / CDVPH (Surface Mount Type)
Applicable Scenarios: High-power power supplies, miniaturized systems, high-altitude and high-flying equipment. Problems Solved: Insufficient voltage withstand, high ESR, large size, poor temperature range performance.

Core Advantages

Voltage withstand 125V~400V, filling the gap in high-voltage products of the same specification; ESR as low as 15mΩ, significantly improving ripple suppression and heat dissipation, reducing heat dissipation costs by 20%.

Stable across the entire temperature range of -55℃~+150℃, with minimal ESR and capacitance fluctuations, reducing field repair rates by over 90%; low leakage current, can withstand 20A high-current surges, excellent overload capacity.

Patented miniaturized design reduces overall size by over 15%; lifespan of 2000 hours at 105℃, with a practical lifespan of up to 15 years.

Key parameters: Voltage 125V~400V, Capacitance 1.0μF~82μF, Maximum ripple current 3A@105℃ 100KHz. Application verification: Applied to shipborne radar, UAV flight control power supplies, etc., passed all rigorous GJB 360B and CNAS tests, demonstrating stable long-term performance in humid and hot environments.

(II) High Temperature Resistant Series: CDNPT (lead wire type) / CDVPT (surface mount type)

Applicable scenarios: High-power power supplies, high-altitude, high-altitude flight equipment. Problems solved: Short lifespan at high temperatures, difficulty in replacing imported products, size exceeding limits.

Core advantages:

Supports stable operation from -55℃ to +150℃, can operate continuously at 125℃, significantly reducing maintenance costs; ESR as low as 15mΩ, compact size.

Pin-to-pin replacements for Japanese products from Panasonic, Nichicon, and Gummicon; domestically sourced, delivery time reduced to 4-6 weeks, completely eliminating supply chain disruption risks.

Key parameters: Voltage 6.3V~100V, Capacitance 2.2μF~10000μF, Maximum ripple current 10A@105℃ 100KHz; Lifespan 2000 hours at 125℃, up to 20000 hours at 105℃. Application verification: Compatible with low-altitude aircraft, aviation power supplies, and satellite payloads; successfully passed military-grade tests including low temperature, high altitude, vibration, and salt spray.

General quality assurance:

All models are GJB9001 certified; stable domestic mass production and supply; CNAS testing reports and military test data are available.

IV. Full Life Cycle Cost Analysis

While the unit purchase price of Yongming capacitors is slightly higher than ordinary products, their overall cost is more advantageous:

Short lead time of 4-6 weeks, eliminating project delay penalties;
Extra-long service life, significantly reducing after-sales maintenance costs in the field;
Miniaturized + low ESR design, reducing PCB and overall BOM costs.

Product value is reflected in cost reduction, efficiency improvement, and risk mitigation throughout the entire process.

V. Scenario-Based Q&A

Q1: Shipborne radar PFC circuits require 250V low-ESR filter capacitors; the original electrolytic capacitors have high ripple and cause severe heat generation. A1: Yongming CDVPH/CDNPH high-voltage series is selected; the typical ESR value for 250V is 20mΩ, superior to industry standards, effectively suppressing ripple and reducing temperature rise.

Q2: The missile power supply originally used Panasonic high-temperature capacitors; import lead times are long and supply chain risks are high. Seeking a domestic direct replacement solution. A2: We recommend the CDVPT/CDNPT high-temperature resistant series. Their parameters and packaging are perfectly comparable and offer superior ESR performance. A selection table and PCB layout suggestions are available.

Q3: The missile-borne power supply requires capacitors to operate continuously at 125℃ for over 2000 hours, and a GJB screening report is required. A3: The CDVPH/CDNPH high-voltage resistant series meets this requirement, possessing complete GJB and CNAS lifespan and environmental test reports, and meeting operational lifespan standards.

VI. Summary

Addressing the high-voltage, high-temperature, miniaturized, and high-reliability requirements of military equipment, Yongming's two major series of military-grade solid-state capacitors, with their advantages of high voltage resistance, ultra-low ESR, wide temperature stability, and long lifespan, combined with comprehensive military qualifications, facilitate the localization of military components. Choosing Yongming is not just choosing a capacitor, but choosing a high-return, high-reliability overall solution.