Business > Industrial Devices > Automation Controls Top > Components & Devices > Relays / Couplers > Microwave Devices > Microwave Devices Lineup > RA Relays > Cautions For Use
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Pure DC current should be applied to the coil. The wave form should be rectangular. If it includes ripple, the ripple factor should be less than 5%.
However, check it with the actual circuit since the characteristics may be slightly different. The nominal operating voltage should be applied to the coil for more than 10 ms to set/reset the latching type relay.
When connecting coils, refer to the wiring diagram to prevent mis-operation or malfunction.
Since RA relays are highly sensitive polarized relays, their characteristics will be affected by a strong external magnetic field. Avoid using the relay under that condition.
For automatic cleaning, the boiling method is recommended. Avoid ultrasonic cleaning which subjects the relays to high frequency vibrations, which may cause the contacts to stick.
It is recommended that alcoholic solvents be used.
(General tolerance: ±0.1 ±.004)
Manual soldering shall be performed under following condition.
In case of automatic soldering, the following conditions should be observed
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T1 = 150 to 180°C 302 to 356°F
T2 = 230°C 446°F and higher
T3 = Within 250°C 482°F
t1 = 60 to 120 sec.
t2 = Within 30 sec.
Temperature rise of relay itself may vary according to the mounting level or the heating method of reflow equipment.
Therefore, please set the temperature of soldering portion of relay terminal and the top surface of the relay case not to exceed the above mentioned soldering condition.
It is recommended to check the temperature rise of each portion under actual mounting condition before use.
The soldering earth shall be performed by manual soldering.
Condensation forms when there is a sudden change in temperature under high temperature and high humidity conditions. Condensation will cause deterioration of the relay insulation.
Condensation or other moisture may freeze on the relay when the temperature is lower than 0°C 32°F. This causes problems such as sticking of movable parts or operational time lags.
The plastic becomes brittle if the relay is exposed to a low temperature, low humidity environment for long periods of time.
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Connect connectors 1 and 2 respectively to PORT1 and PORT2.
Perform calibration using the 3.5 mm .138 inch calibration kit (HP85033C).
No. | Product name | Contents |
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1 | HP 11857D | 7mm Test port, Extension cable, (APC7connector) |
2 | HP 11533A | Adapter, APC7-SMA (Male) |
After calibration, connect the D.U.T board and measure.
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Material | ; | Glass PTFE R-4737 (manufactured by our company) |
Board thickness | ; | t = 0.8mm .031inch |
Copper planting thickness | ; | 18μm (Double sided) |
Connector (SMA type) | ||
Product name | ; | R125 403 (RADIALL) |
Insertion loss compensation | ; | The insertion loss of relay itself is given by subtracting the insertion loss of short-circuit the Com and the NC (or NO). (signal path and two connectors) |
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