RI-48 Series Dry Reed Switch

RI-48 Series

Micro dry-reed switch hermetically sealed in a gas-filled glass envelope.

Single-pole, single-throw (SPST) type, having normally open contacts, and

containing two magnetically actuated reeds.

The switch is of the double-ended type and may be actuated by an electro-

magnet, a permanent magnet or a combination of both. The device is in-

tended for use in relays for switching power loads and high stand-off voltage

applications.

RI-48 Series Features

▪ Perfect heavy load switch

▪ Can handle loads up to 70 Watts

▪ Contact layers: gold, sputtered ruthenium

▪ Superior glass-to-metal seal and blade alignment

▪ Excellent life expectancy and reliability

▪ RoHS Compliant

Dimensions for RI-48 Series

All Dimension in inches (mm) nominal

General data for all models RI-48

AT-Customization / Performed Leads

Besides the standard models, customized products can also

be supplied offering the following options:

• Operate and release ranges to customer specification

• Cropped and/or performed leads

Coils

All characteristics are measured using the Philips Standard

Coil. For definitions of the Philips Standard Coil, refer to

“Application Notes” in the Reed Switch Technical & Applica-

tion Information Section of this catalog.

Life expectancy and reliability

The life expectancy data given below are valid for a coil

energized at 1.5 times the published maximum operate

value for each type in the RI-48 series.

No load conditions (operating frequency:

100Hz)

Life expectancy: min. 108 operations with a failure rate of

less than 10-9 with a confidence level of 90%.

End of life criteria:

Contact resistance > 1Ω after 2 ms

Release time > 2 ms (latching or contact sticking).

Loaded conditions (resistive load: 20 V; 500

mA; operating frequency: 125 Hz)

RI-48AA

Life expectancy: min. 107 operations with a failure rate of

less than 10-8 with a confidence level of 90%.

End of life criteria:

Contact resistance > 2Ω after 2.5 ms

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

RI-48A; RI-48B; RI-48C

Life expectancy: min. 2.5 x 107 operations with a failure

rate of less than 10-8 with a confidence level of 90%.

End of life criteria:

Contact resistance > 2Ω after 2.5 ms

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

Loaded conditions (resistive load: 100 V-700

mA; operating frequency: 20 Hz)

RI-48B; RI-48C

Life expectancy: min. 3 x 105 operations with a failure rate

of less than 10-6 with a confidence level of 90%.

0.026 max

(Ø0.65)

1.079 ± 0.020

(27.4 ± 0.5)

2.157 ± 0.020

(54.8 ± 0.5)

0.807 max

(20.5)

0.106 max

(Ø2.7)

formerly

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

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