A CA30 axial wet tantalum capacitor produced by BEC is high-performance, hermetically sealed electronic component with leads extending from opposite ends (axial) that uses a liquid electrolyte for high capacitance, energy density, and reliability, making it ideal for demanding applications like military, aerospace, and telecom where failure is critical, despite being costlier than solid types. They offer excellent temperature stability, low leakage, and stable performance in compact, robust packages. This series of capacitors are widely used in aerospace and defense areas in power supplies for satellites, missiles, and avionics. Also seen in medical and industrial sectors. like underwater equipment.
Basic Parameters
|
Product Category |
CA30 axial wet tantalum capacitor |
|
Capacitance Range |
0.33UF~3300UF |
|
Voltage Range |
6.3V~125V |
|
Working Temperature |
-55℃~125℃ |
|
Tolerance |
±10%, ±20% |
|
Certificate |
RoHS, REACH |
|
Applications |
Aerospace, Defense and avionics, medical devices, Industrial applications, Telecommunications |
Characteristics
The CA30 axial wet tantalum capacitor is a through-hole package, silver-cased, half-sealed tubular polarized component with glass-sealed insulation sleeve. It features low DC leakage, stable performance, high reliability, and long shelf life, very suitable for -55°C to +125°C (voltage derating above 85°C). It meets the standard SJ/T10030-91 and widely used in military and civil electronic equipment such as telecommunication, aerospace, and aviation.
Low equivalent series resistance: Significantly lower than solid MnO₂ tantalum capacitors in SMD or radial types, especially at lower temperatures. The liquid electrolyte remains conductive at low temperatures.
Reverse Voltage Tolerance: A unique and critical feature. Most CA30 capacitors are rated to withstand a limited reverse voltage (typically 1.0 to 3.0V DC, specified in the datasheet) without damage. This is impossible for solid tantalum capacitors.
Self-Healing Ability: Minor dielectric flaws are "burned away" by the electrolyte, preventing latent failures-a major reliability advantage.
Production Process
Parts of Our Production Facilities
FAQ
Q1: What may cause high DC leakage?
A1: Higher DC leakage occurs may due to the following causes: overvoltage/Reverse voltage, exceeding temperature limits (without derating), damaged insulation or poor soldering or manufacturing defects (it rarely happens in qualified parts)
Q2: What are common failure modes?
A2: The main failure modes come from the following sections: short circuit, reverse voltage, overvoltage, or internal damage, high leakage, over-temperature/voltage, poor insulation.
open circuit (lead fracture or internal connection failure).
Q3: Is it true that they don't never explode or burn?
A3: Essentially yes. The dominant failure mode is a graceful degradation. A slow increase in ESR or decrease in capacitance ("dry-out") over many years, or a short that is "healed" by the electrolyte, resulting in an open circuit. Catastrophic, violent failures are exceedingly rare.
Q4: Why is it so expensive?
A4: Cost drivers include:
Material: Tantalum metal, high-purity acid, hermetic packaging.
Labor-Intensive Manufacturing: Welding, filling, sealing under vacuum.
Extensive Testing: Every single unit undergoes MIL-SPEC screening (burn-in, thermal shock, hermeticity tests).
Low-Volume, High-Assurance Market.
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