Axial Lead Reed Switches Low Power > MACD-14 MACD-14 14mm Close-Differential Reed Switch RoHS Description The MACD-14 reed switch is a close-differential, sub-miniature, normally open switch with a 14.00mm long x 2.28mm diameter (0.551 x 0.090) glass envelope, capable of switching 200Vdc at 10W. This reed switch is also available in a surface mount version, MASM-14. It has 10 a high insulation resistance of 10 ohms minimum and contact resistance less than 100 milli-ohms. Both reed switches are intended for use in applications that require low hysteresis between Pull-In and Drop-Out values. Features Low close/open hysteresis (close UL Recognized for use in Class I, differential) Division 2, Groups A, B, C and D Normally open switch and Class I, Zone 2, AEx/Ex nC IIC Capable of switching Agency Approvals Hazardous Locations. 200Vdc or 0.5A at up to 10W Evaluated as an ATEX Component UL Recognized for the US and for use in Potentially Explosive Agency Agency File Number Ampere-Turns Range Canadian Markets per UL 508 and Atmospheres. Marked II 3 G Ex nC CSA C22.2 No. 14-10. E47258 IIC Gc. 10-30 AT E471070 Benefits Note: Contact Littelfuse for specific agency approval ratings. Zero operating power required for Hermetically sealed switch 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) CL OF OVERLAP Applications 22.15 Industrial Controls (.872) REF. Position Sensing 0.51 Office Equipment 2.28 Level Sensing (.020) DIA. REF. (.090) MAX. Home Appliances Security Switch Type 14.80 14.00 Contact Form A (SPST-NO) (.583) MIN. (.551) MAX. 44.30 Body: Glass Materials (1.744) NOM. Leads: Tin-plated Ni-Fe wire Note: SPST-NO = Single-pole, single-throw, normally open Electrical Ratings 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 and 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.Axial Lead Reed Switches Low Power > MACD-14 MACD-14 14mm Close-Differential Reed Switch Product Characteristics Operating Characteristics 1 Operate Time 0.6ms - max. 1 Release Time 0.20ms - 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 10-30 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. 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 25 MACD-14-10-15 Max. 20 Series Min. 15 AT Range Example: 10-15 AT 10 10-15 AT product is 15-20 AT MACD-14-10-15 20-25 AT 25-30 AT 5 Note: These AT values are the before-modification values of the bare reed switch. 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. Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk 1000 N/A N/A Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. 2020 Littelfuse Revised: BO.12/07/20 littelfuse.com Specifications are subject to change without notice. Drop-Out (AT, L4989 Coil)