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High-Voltage Reed Relays: Features and Applications of HVR1A05/12/24-THT and HVR1A05/12/24-SMD
2024-05-29 16:28
High‑voltage reed relays: HVR1A05/12/24‑THT and HVR1A05/12/24‑SMD, available in through‑hole and surface‑mount packages. These relays feature hermetic sealing for extended service life, low contact resistance, and a single normally open contact configuration. Coil voltages include 5 VDC, 12 VDC, and 24 VDC, with a maximum current rating of 2.5 A and a dielectric strength of up to 7 kVDC.
This model is used in the following industries:
(1) Insulation measurement for hybrid and electric vehicles: Its stable and reliable switching characteristics enable accurate measurement of isolation voltage, while offering leakage current detection in the picoampere range and rapid switching speeds of up to 1 ms. When the insulation performance of an electric vehicle degrades, reed relays can issue early warnings, effectively preventing the occurrence of serious failures.
(2) Battery Management System: It can reliably repeat each switching cycle, handling a wide range of power loads and external environmental conditions. Compared with semiconductor switches, reed relays exhibit linear internal capacitance that remains stable across temperature variations, and their internal components do not degrade over time, thereby ensuring the long-term stable operation of the battery management system.
(3) General-purpose electronic test equipment: It performs critical functions such as signal switching, isolation, and protection. Its high reliability, long service life, and rapid response enable the test equipment to operate stably in a wide range of complex environments, accurately assessing the performance of electronic components and systems. Moreover, reed relays offer low contact resistance and excellent isolation, ensuring the accuracy and reliability of test results. Under extreme conditions—such as high‑frequency, high‑voltage, and high‑temperature testing—reed relays continue to maintain stable performance, meeting the stringent requirements of test equipment for high precision and high reliability.
(4) Battery-powered devices: Reed relays feature extremely low power consumption, thereby maximizing battery life. At the same time, their high reliability and long service life ensure the stability and safety of battery-powered equipment over extended periods of operation. Furthermore, reed relays offer excellent isolation performance, effectively protecting battery-powered devices from damage under abnormal conditions such as overcharging, deep discharging, or short circuits.
(5) Automatic Test Equipment (ATE): ATE uses programmable control of relay switches to enable the transmission or reception of multi‑channel test signals at the pins of the Device Under Test (DUT). Reed relays offer extremely high off‑state resistance and very low on‑state resistance, fully meeting ATE’s requirements for electrical performance.
(6) Medical Equipment: In automated external defibrillators (AEDs), reed relays are employed in high-voltage charging circuits, ensuring the device functions reliably at critical moments and helps save lives. Moreover, reed relays also play an important role in medical devices such as blood pressure monitors, electrocardiographs, and ventilators.
(7) Portable defibrillators: Due to their low power consumption and high reliability, reed relays are an ideal choice for driving the charging circuit. In emergency situations, the rapid response and dependable performance of reed relays ensure the proper operation of the defibrillator, providing critical support in the rescue of patients experiencing sudden cardiac death.
(8) Replacement for wet reed relays: In addition to the aforementioned applications, dry reed relays can serve as substitutes for wet reed relays, delivering superior performance in scenarios demanding high reliability and long service life. Furthermore, in the communications sector, dry reed relays are extensively employed for signal switching and isolation, thereby providing robust assurance for the stable operation of communication systems.
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