Axial Lead Reed Switches High Power > MLRR-4 MLRR-4 15.2mm Sub-miniature Close Differential Reed Switch RoHS Description The MLRR-4 Reed Switch is a sub-miniature, normally open switch with a 15.24mm long x 2.54mm diameter (0.600” x 0.100”) glass envelope, and capable of switching 200Vdc at 20W with close differential (CD) characteristics. It has high insulation resistance of 1010 ohms minimum and contact resistance less than 100 milli-ohms. It can handle lamp loads up to 2W @ 14V with no suppression circuitry. This reed switch is also available in a surface mount version, that is, MLSM-4. Features • Sub-miniature normally open switch • Available sensitivity range 17-38 AT • Capable of switching 200Vdc or • Capable of switching small 1.0A at up to 20W incandescent lamp loads Agency Approvals • Close differential AT between PI and DO value Agency Agency File Number Ampere-Turns Range Benefits E47258 • Hermetically sealed switch contacts • Excellent for switching 17-38 AT E471070 are not affected by and have no microcontroller logic level loads and effect on their external environment small incandesent lamp loads DEMKO 14 ATEX 1393U 17-38 AT • Zero operating power required for contact closure Dimensions Applications Dimensions in mm • Position Sensing • Light Inductive Loads 20.19 • Security Systems • Office Equipments (.795) REF. Ø2.66 0.61 • Level Sensing • Lamp Loads up to 2W @ 14V CL OF OVERLAP (.105) MAX. (0.024) DIA. REF. Switch Type 12.19 15.24 Contact Form A (SPST-NO) (.480) MIN. (.600) MAX. 40.38 Body: Glass (1.590) NOM. Materials Leads: Tin Plated Nickel Iron Note: SPST-NO = Single-pole, single-throw, normally open Electrical Ratings Contact Rating 1 Watt - max. 20 Switching 2 Vdc - max. 200 Voltage 3 Vac - max. 140 Breakdown 4 Vdc - min. 250 Switching 2 Adc - max. 1.0 Current 3 Aac - max. 0.7 Carry Adc - max. 1.0 Contact, Initial Ω - max. 0.10 Resistance Insulation Ω - min. 1010 Capacitance Contact pF - typ. 0.4 Operating °C -40 to +125 Temperature Storage 5 °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. © 2015 Littelfuse littelfuse.com Specifications are subject to change without notice.

Axial Lead Reed Switches High Power > MLRR-4 MLRR-4 15.2mm Sub-miniature Close Differential Reed Switch Product Characteristics Operating Characteristics Operate Time 1 0.6ms - max. Release Time 1 0.2ms - max. Shock 2 11ms 1∕2 sine wave 100G - max. Vibration 2 50-2000 Hertz 30G - max. Resonant Frequency 6.25kHz - typ. Magnetic Characteristics Pull-In Range 3 Ampere Turns 17-38 Rating Sensitivity 4 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 40 MLRR-4-17-23 Max. 35 30 Min. AT, L4989 Coil) 2205 AT RSaenrigees Out ( 17-23 AT Example: Drop- 15 17-28 AT 1M7L-2R3R A-4T- 1p7r-o2d3uct is 22-28 AT 10 22-33 AT 5 27-33 AT 27-38 AT 0 32-38 AT 0 5 10 15 20 25 30 35 40 45 50 Pull-In (AT, L4989 Coil) Note: This AT value is the before-modification value of the bare reed switch. Note: The chart represents the range of Drop-Out, minimum to maximum for a given Pull-In value. Additional Information Datasheet Resources Samples Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk 3000 N/A N/A ©© 22001155 LLiitttteellffuussee lliitttteellffuussee..ccoomm SSppeecciifificcaattiioonnss aarree ssuubbjjeecctt ttoo cchhaannggee wwiitthhoouutt nnoottiiccee..

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: L ittelfuse: MLRR-4 22-38 MLRR-4 27-38 MLRR-4 17-28 MLRR-4 17-38 MLRR-4 32-38 MLRR-4 22-33 MLRR-4 27-33 MLRR-4 17-23 MLRR-4 22-28 MLRR-4-22-28 MLRR-4-17-23 MLRR-4-27-33 MLRR-4-17-38 MLRR-4-27-38 MLRR-4-22-33 MLRR-4-32-38 MLRR-4-17-28 MLRR-4-22-38 MLRR-4-12-18 MLRR-4-37-43