MASM-14-20-25 Littelfuse

Surface Mount Reed Switches Low Power > MASM-14 MASM-14 14mm Close-Differential Reed Switch RoHS Description The MASM-14 surface mount reed switch is a close-differential, sub-miniature, normally open switch with a 14mm long x 2.28mm diameter (0.551 x 0.090) glass envelope, capable of switching 200Vdc at 10W. This reed switch is a surface mount version of MACD-14. It has high insulation 10 resistance of 10 ohms minimum and a contact resistance of less than 100 milliohms. Both reed switches are intended for use in applications that require low hysteresis between Pull-In and Drop-Out values. Features Surface mount normally open Low close/open hysteresis (close Agency Approvals switch differential) Capable of switching 200Vdc or Agency Agency File Number Ampere-Turns Range 0.5A at up to 10W E47258 10-30 AT E471070 Benefits Zero operating power required for Hermetically sealed switch Note: Contact Littelfuse for specific agency approval ratings. contact closure contacts are not affected by and Excellent for switching micro- have no effect on their external controller logic level loads environment Dimensions Dimensions in mm (inch) Applications 2.28 MAX 2x1.140.10 (.090) (.045.004) Industrial Controls Position Sensing Office Equipment Level Sensing Home Appliances Security 17.520.25 RECOMMENDED LAND PATTERN (.690.010) 14.00 MAX 2x3.05 (.120) (.551) 2x1.65 (.065) Switch Type 2.84 MAX (.112) 19.300.25 2x0.00 MIN 14.60 Contact Form A (SPST-NO) (.760.010) (.000) (.575) Note: Land pattern is Littelfuse recommendation only. User is responsible for proper PCB design. Body: Glass Materials Leads: Tin-plated Ni-Fe wire Electrical Ratings Note: SPST-NO = Single-pole, single-throw, normally open 1 Contact Rating W/VA - max. 10 2 Switching Vdc - max. 200 3 Voltage Vac - max. 140 4 Breakdown Vdc - min. 200 2 Switching Adc - max. 0.50 3 Current Aac - max. 0.35 Carry Adc - max. 1.00 Contact, Initial - max. 0.100 Resistance 10 Insulation - min. 10 Capacitance Contact pF - typ. 0.3 Operating C -40 to +125 Temperature 5 Storage C -65 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. 2020 Littelfuse Revised: BO.12/07/20 littelfuse.com Specifications are subject to change without notice.Surface Mount Reed Switches Low Power > MASM-14 MASM-14 14mm Close-Differential Reed Switch Product Characteristics Operating Characteristics 1 Operate Time 0.6ms - max. 1 Release Time 0.2ms - max. 2 Shock 11ms 12 sine wave 100G - max. 2 Vibration 50-2000 Hertz 30G - max. Resonant Frequency 5.3kHz typ Magnetic Characteristics 3 Pull-In Range Ampere Turns 10-15, 15-20, 20-25, 25-30 4 Rating Sensitivity Ampere Turns 20 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. These AT ranges are the before modification AT of the MACD-14. 4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value. Drop-Out vs. Pull-In Chart Part Numbering System 25 Max. MASM-14 R - 10-15 20 Series Min. 15 Packaging R = Tape and Reel 10 AT Range 10-15 AT 15-20 AT 5 20-25 AT 25-30 AT 0 0 5 10 15 20 25 30 35 Pull-In (AT, L4989 Coil) Note: Chart represents the range of Drop Out, min to max for a given Pull-In value of the MACD-14 prior to modification into the MASM-14. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Tape and Reel EIA-RS-481-1 3000 R 32mm 2020 Littelfuse Revised: BO.12/07/20 littelfuse.com Specifications are subject to change without notice. Drop-Out (AT, L4989 Coil)