Axial Lead Reed Switches High Power > DRS-DTH RoHS DRS-DTH 39.7mm Standard Changeover Reed Switch 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 9 resistance of 10 ohms minimum and contact resistance of less than 125 milli-ohms. Agency Approvals Features Changeover switch Minimum voltage breakdown Agency Agency File Number Ampere-Turns Range 1200Vdc Capable of switching 500Vdc E47258 50-80 AT E471070 or 0.5A at up to 30W Available sensitivity range 50-80 AT Note: Contact Littelfuse for specific agency approval ratings. Dimensions Benefits Dimensions in mm (inch) Hermetically sealed switch Capable of switching contacts are not affected by European mains voltage 1.83 0.25 and have no effect on their (.072) NOM. (.010) NOM. Zero operating power external environment 1.27 required for contact closure CL OF OVERLAP 5.54 (.050) DIA. REF. 27.66 Can be used as changeover (.218) MAX. (1.89) REF. 5.33 (.210) MAX. or normally closed contact 1.02 (.040) DIA. REF. 25.40 12.45 (1.000) NOM. (.490) NOM. 38.10 - 39.67 (1.500) NOM. - (1.562) MAX. 85.73 - 84.14 (3.375) NOM. - (3.3125) MIN. Switch Type Applications Security Industrial safety applications Contact Form C (SPDT-CO) Limit switching White goods applications Body: Glass Materials Leads: Tin-plated Ni-Fe wire Note: SPDT-CO = Single-Pole, Double-Throw, Change Over Electrical Ratings 1 Contact Rating - W/VA - max. 30 Vdc - max. 500 2 Switching 3 Voltage Vac - max. 350 4 Breakdown Vdc - min. 1200 Adc - max. 0.50 2 Switching 3 Current Aac - max. 0.35 Carry Adc - max. 3.0 - max. 0.125 Resistance Contact, Initial Insulation 9 10 - min. Contact pF - typ. 2.0 Capacitance Operating -20 to +125 C Temperature 5 -65 to +125 Storage 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. 2020 Littelfuse, Inc. 5. Storage Temperature - Long time exposure at elevated temperature may degrade solderability of the leads. Specifications are subject to change without notice. Revised: BO/12/08/20Axial Lead Reed Switches High Power > DRS-DTH DRS-DTH 39.7mm Standard Changeover Reed Switch Product Characteristics Operating Characteristics 1 Operate Time 4.5ms - max. - 1 Release Time 7.0ms - max. - 2 Shock 11ms 12 sine wave 10G - max. 2 Vibration 50-2000 Hertz 15G - max. Resonant Frequency Hz - typ. 2.75kHz - typ. Magnetic Characteristics 3 Pull-In Range Ampere Turns 50-80 4 Rating Sensitivity Ampere Turns 60 Test Coil - L4988 Drop-Out Ampere-Turns - min. - 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. Drop-Out vs. Pull-In Chart Part Numbering System 70 DRS-DTH-50-80 60 50 Series 40 AT Range Max. 50-55 AT Example: 50-60 AT 50-80 AT product is 30 DRS-DTH-50-80 Min. 50-80 AT 55-60 AT 20 55-65 AT 65-70 AT 10 65-80 AT 70-75 AT 0 0 10 20 30 40 50 60 70 80 90 70-80 AT Pull-In (L4988 Coil) 75-80 AT 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 Quantity Quantity & Packaging Code Taping Width Bulk Bulk 1000 - - 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/disclaimier-electronics. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BO/12/08/20 Drop-Out (L4988 Coil)