Gas-filled contactors for high-voltage safety disconnection up to 1500 VDC and 600 ADC
TDK’s High-Voltage Contactor (HVC) Series is designed to meet the demands of high-voltage and high-current DC applications, especially for disconnecting high-voltage lithium-ion batteries. The hermetically sealed and gas-filled ceramic arc chamber is based on more than 80 years of experience with gas tube technology. The HVC series can be used in a wide range of applications where fast and reliable disconnection of high DC voltages is required.
The basic design consists of a moveable armature inside a hermetically sealed, gas-filled chamber. The armature is moved by an electromagnet and opens the contact to interrupt the high current. During disconnection of a high DC voltage normally an arc is generated.
Features
Highly accurate and fast switching
The hermetically sealed ceramic arc chamber is gas-filled for highly accurate fast switching and ensuring reliable operation over the whole lifetime.
The TDK High-Voltage-Contactor Series extinguishes in 1.2 ms with clear break of current.
The typical contactor part will extinguish in 4.6 ms with lots of fluctuations, which heats up the main contacts.
The TDK HVC series provides a longer lifetime and increased reliability compared with existing products due to
Less heat on the contacts
Less likely to become stuck
Less EMI
Contactless stuck detection – Hall
Advantages
Available as Normally Closed (HC) or Normally Open (HO)
Tack welding proof – no tack welding of aux. contact possible
More than 1 million switching cycles
Short circuit proof due to ProFET technology inside
The Hall switch reacts only to the south pole of the indicator magnet only and is resistant to lateral stray fields.
The Hall sensor indicates a “Make” or “Break” depending on the presence of the magnetic field from the indicator magnet. It acts as a switch depending on the presence of a certain magnetic field. The indicator magnet is mounted to the axis, which is connected with the contact bridge. The up or down state of the axis changes the magnetic field sensed by the Hall sensor.
Single coil VS. dual coil
Single Coil
No additional current durig make (pick-up)
Operating power: 6 W, 0.5 A @ 12 V
No economizer required
Integrated coil termination
Dual Coil
Power during make (pick-up) 38 W, 3.2 A @ 12 V during 80...120 ms
Operating power: 4.2 W (0.35 A) @ 12 V
Hot-restartability (<1 s)
Works like an economizer but without the disadvantages of a PWM circuit
Integrated coil termination
Dual coil
High-voltage contactors are not designed to permanently switch under load
The device switches under load only in case of an emergency
Switching capability depends on voltage, current, inductance and resistance during break
Dual coil for increased lifetime of >50%: 3000 cycles with 300 A @ 450 V, 1000 cycles with 300 A @ 750 V
Bipolar contacts
The HVC has a bipolar design so that connection is possible regardless of polarity. This is a great advantage during assembly and also allows charging and discharging of a battery without using a second contactor.
Reliability
>1 million mechanical switching cycles
CE marking, complies with EC Low Voltage Directive 2014/35/EC
All our sites are certified according to the following standards: ISO 9001, IATF 16949, ISO 14001
UL 60947-4-1 certified File No: E491412
Tested in accordance with AEC Q-200, Rev. D
Up to 1200 VDC operating voltage and 500 ADC continuous current capability.
The High Voltage Contactor is a safety-relevant component, especially in electric mobility. It must safely disconnect very high currents and, at the same time, very high voltages in dangerous situations. The white paper describes the exact functionality.
Electrical and Commercial Vehicles / Battery Junction Boxes
Energy Storage Systems
Electrical and Commercial Vehicles / Battery Junction Boxes
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