Reed Switch RI-90


	RI-90 Series Dry Reed Switch


	RI-90 Series Micro changeover dry-reed switch hermetically sealed in a gas-filled envelope. Single-pole, double-throw (SPDT) type, having a normally open and a normally closed contact. The switch may be actuated by an electromagnet, a permanent magnet or a combination of both. The device is intended for use in sensors, relays, pulse counters or similar devices.

		RI-90 Series Features u Ideal for ATE switching and proximity sensors u Contact layers: Ruthenium on gold u Superior glass-to-metal seal and blade alignment u Excellent life expectancy and reliability


		Dimensions in Inches (Millimeters)

Model Number			RI-90
Parameters	Test Conditions	Units

Operating Characteristics
Operate Range		AT	15-40
Release Range		AT	Min 5
Operate Time (max)	(energization)	ms	1.0
Bounce Time (max)	(energization)	ms	1.5
Release Time (max)	(energization)	ms	1.0
Resonant Frequency (typ.)		Hz	TBD

Electrical Characteristics
Switched Power (max)		W	5
Switched Voltage DC (max)		V	175
Switched Voltage AC, RMS value (max)		V	125
Switched Current DC (max)		mA	400
Switched Current AC, RMS value (max)		mA	280
Carry Current DC; AC, RMS value (max)		A	0.5
Breakdown Voltage (min)		V	200
Contact Resistance (initial max)		m W	140
Contact Resistance (initial typ.)		m W	120
Contact Capacitance (max)	without test coil	pF	0.8
Insulation Resistance (min)	RH £ 45%	M W	10³


	General data for all models RI-90 AT-Customization / Preformed 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 preformed leads

	Coils All characteristics are measured using the Philips Standard Coil. For definitions of the Philips Standard Coil, see Reed Technical & Application Information Section.

	Life expectancy and reliability The life expectancy data given below are valid for a coil energized at 1.25 times the published maximum operate value for each type in the RI-90 series.

	No-load conditions (operating frequency: 100 Hz) Life expectancy: min. 10⁸ operations with a failure rate of less than 2 x 10^-9 with a confidence level of 90%. End of life criteria: Contact resistance >1W after 2 ms Release time > 2 ms (latching or contact sticking) Switching different loads involves different life expectancy and reliability data. Further information available upon request.

	Operating and Storage Temperature Operating ambient temperature; min: -55°C; max: +125°C. Storage temperature; min: -55°C; max: +125°C. Note: Temperature excursions up to 150°C may be permissible. For more information contact your nearest Coto Technology 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 accordance 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.

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