DRT-DTH LITTELFUSE | Alldatasheet

Document overview

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Technical content

Features

  • Changeover switch
  • Capable of switching 500Vdc or 1.5A at up to 50W
  • Minimum voltage breakdown 1000Vdc
  • Available sensitivity range 50-80 AT Benefits
  • Hermetically sealed switch contacts are not affected by and have no effect on their external environment
  • Can be used as changeover or normally closed contact
  • Capable of switching European mains voltage
  • Zero operating power required for contact closure

Applications

  • Security
  • Limit switching
  • Industrial safety applications
  • White goods applications Dimensions Dimensions in mm (inch) High Power > DRT-DTH RoHS Electrical Ratings Contact Rating 1 W/VA - max. 50 Voltage 3 Switching 2 Breakdown 4 Vdc - max. Vac - max. Vdc - min. 500 350 1000 Current 3 Switching 2 Carry Adc - max. Aac - max. Adc - max. 1.5 1.0 2.0 Resistance Contact, Initial Insulation Ω - max. Ω - min. 0.500 6 109 Capacitance Contact pF - typ. 2.0 Temperature Operating Storage 5 -20 to +125 -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. 6. Contact resistance measured at 36Vdc, 100mA, switched wet. 7. Not recommended for small electrical loads. 1.83 (.072) NOM. 25.40 (1.000) NOM. 12.45 (.490) NOM. 38.10 - 39.67 85.73 - 84.14 0.25 (.010) NOM. CL OF OVERLAP5.54 (.218) MAX. 27.66 (1.89) REF. 5.33 (.210) MAX. 1.02 (.040) DIA. REF. 1.27 (.050) DIA. REF. Note: SPDT-CO = Single-Pole, Double-Throw, Change Over

littelfuse.com © 2015 Littelfuse Revised: 11/02/15 Specifications are subject to change without notice. Drop-Out vs. Pull-In Chart Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk 1000 N/A N/A Product Characteristics Operating Characteristics Operate Time 1 5.5ms - max. Release Time 1 8.0ms - max. Shock 2 11ms 1∕2 sine wave 10G - max. Vibration 2 50-2000 Hertz 15G - max. Resonant Frequency Hz - typ. 2.75kHz - typ. Part Numbering System 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. Surface Mount Reed Switches High Power > DRT-DTH DRT-DTH 39.7mm Standard Changeover Reed Switch DRT -DTH-50-80 Series AT Range 50-60 AT 50-65 AT 50-80 AT 65-75 AT 70-75 AT 70-80 AT 75-80 AT Example: 50-80 AT product is DRT -DTH-50-80 Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value. Note: These AT values are the before-modification values of the bare reed switch. Magnetic Characteristics Pull-In Range 3 Ampere Turns 50-80 Rating Sensitivity 4 Ampere Turns 60 Test Coil L4988 100 Pull-In (AT, L4989 Coil) Drop-Out (AT, L4989 Coil) 20 30 40 50 60 70 80 90 Max. Min.