Data Sheet

High Voltage Reed Relays
Product Data Sheet
GENERAL INFORMATION
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DESCRIPTION
Reed Relays consist of a reed switch and coil tted into a housing, which could be plastic, metal or moulded. Compared with electromechanical relays, reed
relays generally have a faster response time, lower coil consumption and are smaller in size. Furthermore, the switch is sealed in a dry, inert atmosphere
preventing the ingress of contaminants.
OPERATION
High Voltage Relays have outstanding performance in insulation and stand-
off voltage. Energizing the coil operates a reed switch causing the contacts
to open or close. It is important that the switch is not overloaded by apply-
ing loads in excess of the switch ratings. For details on switch loads refer
to the reed relay specications and the reed switch application page in the
catalogue.
General Parameters
All characteristics for pull-in voltage, drop-out voltage and coil resistance
at 20°C ±3°C ambient temperature. For other temperatures see diagram
“operating temperature.”
Contact Resistance
Initial value at nominal voltage measured by the Kelvin test method at
20V/100mA.
Soldering
During soldering make sure no mechanical stress is applied to terminals
because the thermoplastic moulding material might be damaged.
Insulation Resistance
The insulation resistance is measured with a Tera Ohmmeter at 500V DC.
The ambient climate is 20°C ±3°C and 50% relative humidity.
Contact Capacitance (Typical Values)
Across open contacts 0.8 - 1.2 pF
Between open contact and coil 1.4 - 2.2 pF
Between closed contacts and coil 2.3 - 3.5 pF
Shock and Vibration
During shock and vibration tests the relays must be energized with nominal
voltage. The contact should not open or close longer than 10 μs.
Vibration stability: 20 g/50 - 500 Hz. Shock stability: 35 g/11 ms half sine
wave.
Life Expectancy
The life expectancy of a Reed Relay is at least 105 - 106 operations at nomi-
nal load. At minimum load the life expectancy can endure up to 5 x 108 oper-
ations. The mechanical life expectancy is 109 operations (minimum). When
switching higher loads, especially inductive or capacitive and lamp loads,
life expectancy can be considerably reduced. Proper contact protection will
reduce electromagnetic interference and rapid contact erosion.
Dielectric Strength
Tested in a radiation (eg. light, x-ray) free environment by applying a DC
voltage across the open contacts, between adjacent contacts and between
coil and contact. The test current is 100 mA. The unused contacts should
not be connected during the test.
Operating Temperature
The operating temperature is the
internal temperature of the relay
(ambient temperature plus self
heating). If relays are operating at
higher ambient temperatures (Ju)
than +20 °C, the pull-in voltage
and the maximum coil voltage must
be calculated as follows:
Pull-in voltage = Pull-in voltage
at 20°C x k1.
Maximum coil voltage = Max. coil
voltage at 20 °C x k2.
When mounting relays side by side
a gap of approximately half the
relay-width is recommended to avoid mutual magnetic inuence.
How to order High Voltage Relays:
3392 - 1270 - 12 - 6
NOTE: All parts of the order code must be completed
Contact code Coil Voltage
Termination
style
Version
Number
Switching Voltage, Switching
Current and Power Rating
The listed values for switching volt-
age, switching current and power
rating are absolute limits. If any of
these values is exceeded, a reduc-
tion of life expectancy will result
(see power diagram on the right).
Switching Time
Pull-in time including bounce time at
nominal voltage and 20 Hz: 1.5 - 3.5
ms Release time (without diode) at
nominal voltage and 20 Hz: 0.4 - 1.5
ms.