Axial Lead Reed Switches High Power > DRS-DTH DRS-DTH 39.7mm Standard Changeover Reed Switch RoHS Description The DRS-DTH Reed Switch is a large changeover switch with a 39.67mm long x 5.33mm diameter (1.562” x 0.210”) glass envelope, capable high voltage and power switching up to 500Vdc at 2mA, or 0.5A up to 30W/VA. The DRS-DTH has an insulation resistance of 10 9 ohms minimum and contact resistance of less than 125 milli-ohms. • Changeover switch • Capable of switching 500Vdc or 0.5A at up to 30W • Minimum voltage breakdown 1200Vdc Dimensions Dimensions in mm (inch) Benefits 5.33 (.210) MAX. 1.02 (.040) DIA. REF. 12.45 (.490) NOM. 38.10 - 39.67 (1.500) NOM. - (1.562) MAX. • Capable of switching European mains voltage • Zero operating power required for contact closure Applications • Security • Limit switching M 85.73 - 84.14 (3.375) NOM. - (3.3125) MIN. • Available sensitivity range 50-80 AT A 27.66 (1.89) REF. • 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 IN 1.83 0.25 (.010) NOM. (.072) NOM. 1.27 5.54 CL OF OVERLAP (.050) DIA. REF. (.218) MAX. 25.40 (1.000) NOM. RY Features • Industrial safety applications • White goods applications EL I Switch Type Contact Form C (SPDT-CO) Materials Body: Glass Leads: Tin-plated Ni-Fe wire Note: SPDT-CO = Single-Pole, Double-Throw, Change Over Electrical Ratings Contact Rating 1 W/VA - max. 30 Vdc - max. Vac - max. Vdc - min. 500 350 1200 Carry Adc - max. Aac - max. Adc - max. 0.50 0.35 3.0 Resistance Contact, Initial Insulation Ω - max. Ω - min. 0.125 109 Capacitance Contact pF - typ. 2.0 Temperature Operating Storage 5 °C °C -20 to +125 -65 to +125 Voltage 3 PR Current 3 Switching 2 Breakdown Switching 4 2 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. © 2017 Littelfuse Revised: 07/17/17 Specifications are subject to change without notice. littelfuse.com Axial Lead Reed Switches High Power > DRS-DTH DRS-DTH 39.7mm Standard Changeover Reed Switch Product Characteristics Operating Characteristics 1 4.5ms - max. Release Time 1 7.0ms - max. Shock RY Operate Time 11ms 1∕2 sine wave 2 Vibration 10G - max. 50-2000 Hertz 2 Resonant Frequency 15G - max. Hz - typ. 2.75kHz - typ. Magnetic Characteristics Ampere Turns 3 Rating Sensitivity 50-80 A Pull-In Range Ampere Turns 4 Test Coil 60 L4988 IN Notes: 1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil IV). 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. 70 60 50 40 Max. EL Drop-Out (L4988 Coil) Part Numbering System IM Drop-Out vs. Pull-In Chart 30 20 PR 10 Min. 0 0 10 20 30 40 50 60 70 80 90 DRS-DTH-50-80 Series AT Range 50-55 AT 50-60 AT 50-80 AT 55-60 AT 55-65 AT 65-70 AT 65-80 AT 70-75 AT 70-80 AT 75-80 AT Example: 50-80 AT product is DRS-DTH-50-80 Pull-In (L4988 Coil) 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. Packaging Packaging Option Packaging Specification Bulk © 2017 Littelfuse Revised: 07/17/17 Specifications are subject to change without notice. Bulk Quantity 1000 Quantity & Packaging Code N/A Taping Width N/A littelfuse.com