RI-48 Series Dry Reed Switch

Technical Specifications

Parameters

Test Conditions

Units

RI-48A

RI-48B

RI-48C

Operating Characteristics

Operate Range

AT

15-28

24-51

46-70

Release Range

AT

8-20

13-27

18-32

Operate Time - including Bounce (typ.)

ms

0.35

0.35

0.35

Bounce Time (typ.)

ms

0.15

0.15

0.15

Release Time (max)

μs

30

30

30

Resonant Frequency (typ.)

Hz

3200

3200

3200

Electrical Characteristics

Switched Power (max)

W

70

70

70

Switched Voltage DC (max)

V

200

200

200

Switched Voltage AC, RMS value (max)

V

250

250

250

Switched Current DC (max)

mA

1000

1000

1000

Switched Current AC, RMS value (max)

mA

1000

1000

1000

Carry Current DC (max)

A

1.75

2.25

2.25

Breakdown Voltage (min)

V

400

580

780

Contact Resistance (initial max.)

mΩ

90

90

90

Contact Resistance (initial typ.)

mΩ

60

60

60

Contact Capacitance (max)

without test coil

pF

0.2

0.2

0.2

Insulation Resistance (min)

RH ≤ 45%

MΩ

106

106

106

End of life criteria:

Contact resistance > 1.5Ω after 2.5 ms.

Release time > 2.5 ms (latching or contact sticking).

Switching different loads involves different life expectancy

and reliability data. Further information is available on

request.

Mechanical Data

Contact arrangement is normally open; lead finish is

tinned; net mass is approximately 280mg; and can be

mounted in any position.

Shock

The switches are tested in accordance with “IEC 68-2-27”,

test Ea (peak acceleration 500 G, half sinewave; duration

11 ms). Such a shock will not cause an open switch (no

magnetic field present) to close, nor a switch kept closed

by an 80 AT coil to open.

Vibration

The switches are tested in accordance with “IEC 68-2-6”,

test Fc (acceleration 10G; below cross-over-frequency 57

to 62 Hz; amplitude 0.75 mm; frequency range 10 to

2000 Hz; duration 90 minutes.) Such a vibration will not

cause an open switch ( no magnetic field present) to close,

nor a switch kept closed by an 80 AT coil to open.

Mechanical Strength

The robustness of the terminations is tested in accordance

with “IEC 68-2-21”, test Ua1 (load 40 N).

Operating and Storage Temperature

Operating ambient temperature; min: -55°C; max:

+125°C. Storage temperature; min: -55°; max: +125°C.

Note: Temperature excursions up to 150°C may be

permissible. For more information contact your nearest

Comus Group sales office.

Soldering

The switch can withstand soldering heat in accordance

with “IEC 68-2-20”, test Tb, method 1B: solder bath at

350 ± 10°C for 3.5 ± 0.5 s. Solderability is tested in accor-

dance with “IEC 68-2-20” test Ta, method 3: solder

globule temperature 235°C; ageing 1b: 4 hours steam.

Welding

The leads can be welded.

Mounting

The leads should not be bent closer than 1 mm to the

glass-to-metal seals. Stress on the seals should be avoided

Care must be taken to prevent stray magnetic fields from

influencing the operating and measuring conditions.

• As part of the company policy of continued product improvement, specifications

may change without notice. Our sales office will be pleased to help you with the

latest information on this product range and the details of our full design and

manufacturing service. All products are supplied to our standard conditions of

sale unless otherwise agreed in writing.

USA Tel: +(1)973 777 6900 / Fax: +(1) 973 777 8405 ▪ Belgium Tel: + 32 (0)12 390400

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