Axial Lead Reed Switches High Power > MARR-5 MARR-5 14mm Reed Switch RoHS Description The MARR-5 reed switch is a miniature, normally open switch with a 19.69mm long x 2.66mm diameter (0.775” x 0.105”) glass envelope, capable of high voltage switching of up to 1kVdc at 1mA. It has high insulation resistance of 10¹² ohms minimum and contact resistance less than 100 milli-ohms. Features • Miniature normally open switch • Capable of switching 1000Vdc at 1mA or 0.5A up to 10W • Minimum voltage breakdown 2000 Vdc • Available sensitivity range 17-38 AT Benefits Agency Approvals Agency • Zero operating power required for contact closure • Hermetically sealed switch contacts are not affected by and have no effect on their external environment Agency File Number Ampere-Turns Range E47258 E471070 17-38 AT Applications DEMKO 14 ATEX 1393U 17-38 AT • Reed relays (particularly suitable for high voltage breakdown applications) • Security Dimensions Dimensions in mm (inch) Switch Type CL OF OVERLAP (1.117) REF. 28.37 (.105) MAX. 2.66 (.685) MIN. 17.39 • Limit switching • Telecoms line switching • Office equipment (.022) DIA. REF. 0.55 Contact Form A (SPST-NO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open (.775) MAX. 19.69 (2.235) NOM. 56.77 Electrical Ratings Contact Rating Voltage 3 Current 3 1 Switching 2 Breakdown 4 Switching Carry 2 W/VA - max. 10 Vdc - max. Vdc - min. 1000 2000 Adc - max. Adc - max. 0.50 1.30 Resistance Contact, Initial Insulation Ω - max. Ω - min. 0.100 1012 Capacitance Contact pF - typ. 0.2 Temperature Operating Storage 5 °C °C -75 to +125 -75 to +125 Notes: 1. Contact rating - Product of the switching voltage and current should never exceed the wattage rating. Contact Littelfuse for additional load/life information. 2. When switching inductive and/or capacitive loads, the effects of transient voltages and/or currents should be considered. Refer to Application Notes AN108A and AN107 for details. 3. Electrical Load Life Expectancy - Contact Littelfuse with voltage, current values along with type of load. 4. Breakdown Voltage - per MIL-STD-202, Method 301. 5. Storage Temperature - Long time exposure at elevated temperature may degrade solderability of the leads. © 2015 Littelfuse Specifications are subject to change without notice. littelfuse.com Surface Mount Reed Switches High Power > MASM-14 MARR-5 14mm Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.75ms - max. Release Time 1 0.30ms - max. Shock 2 Vibration 11ms 1∕2 sine wave 100G - max. 50-2000 Hertz 30G - max. 2 Resonant Frequency 3.2kHz - typ. Magnetic Characteristics Pull-In Range 3 Rating Sensitivity 4 Ampere Turns 17-38 Ampere Turns 35 Test Coil L4989 Notes: 1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil II). 2. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202. 3. Pull-In Range - Contact Littelfuse for narrower AT ranges available. 4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value. 5. Custom modifications of forming and/or cutting of reed switches are available. Please contact Littelfuse. Drop-Out vs. Pull-In Chart Part Numbering System 30 MARR-5-22-28 Max. Drop-Out (AT, L4989 Coil) 25 20 Series Min. AT Range 17-23 AT Example: 17-28 AT 22-28 AT product is 22-28 AT MARR-5-22-28 22-33 AT 27-33 AT 27-38 AT 32-38 AT Note: These AT values are the before-modification values of the bare reed switch. 15 10 5 0 0 5 10 15 20 25 30 35 40 Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop Out, min to max for a given Pull-In value. Datasheet Packaging Packaging Option Additional Information Packaging Specification Bulk © 2015 Littelfuse Specifications are subject to change without notice. Bulk Quantity 1000 Resources Quantity & Packaging Code N/A Samples Taping Width N/A littelfuse.com