MEDER electronic MK24 Series Micro-Miniature Reed Sensors for SMD Mounting DESCRIPTION MK24 are the smallest, magnetically operated Reed proximity switches for SMD mounting. Due to the offset design of the internal reed switch leads, the sensing characteristics are non-symmetrically related to the sensor body. • Lead design 1: Flat, straight leads for PCB slot mounting. • Lead design 2: Flat, bent SMD leads. • Lead design 3: J-Lead. The sensors are supplied in 16mm Tape & Reel package according to IEC 60286-3. APPLICATIONS FEATURES • Electronic PCB’s where all components are surface mounted • Telecommunication applications (Hook switch in mobile and hard-wired phones) • Switching element in microphones • Medical technologies • Rotary encoder • • • • • Small dimensions: 5.0 x 2.2 x 1.7mm Three operate sensitivities available Tape and Reel available Excellent for low power operations No external power required for sensor operation • UL approved ORDER INFORMATION Series Contact Form Magnetic Sensitivity Lead Design x- y MK24 1 Form A A, B, C 1, 2, 3 1 Form B B 2, 3 MAGNETIC SENSITIVITY Options Sensitivity class Pull In AT Range A 5 - 10 B 10 - 15 C 15- 20 Part Number Example MK24 - B - 1 MK24 - B - 2 - OE B is the magnetic sensitivity 1 is the lead design OE is Opener Form B www.meder.com 285 MEDER electronic MK24 Series Micro-Miniature Reed Sensors for SMD Mounting DIMENSIONS All dimensions in mm [inch] MK24-x-2 MK24-x-1 MK24-x-3 max. 6.9 [0.272] max. 5 [ 0.197] max. 5 [0.197] max. 1.7 [0.067] max. 5.5 [0.217] max. 5 [0.197] max. 1.8 [0.071] max. 7.7 [0.303] max. 1.8 [0.071] 5.4±0,1 [0.213±0.004] max. 2.2 [0.087] 0.75±0.05 max. 2.2 [0.087] [0.03±0.002] [0.03±0.002] RECOMANDED PAD LAYOUT 8.2 [0.323] RECOMANDED PAD LAYOUT RECOMANDED PAD LAYOUT 7.50 [0.295] 1.3 [0.051] 5.7 [0.224] 1.3 [0.051] 1.1 [0.043] 1.4 [0.055] MK24-x-3-OE 2,2 max. [0.087 max.] 5,5 max. [0.217 max.] N 2,5 [0.098] 0,8 max. [0.031 max.] 7,3 ± 0,2 [0.287 ± 0.008] 0,8 max. [0.031 max.] 3,4 ± 0,3 [0.134 ± 0.012] Pad Layout Pad Layout 1,3 [0.051] 1,5 [0.059] 1,4 [0.055] 1,1 [0.043] 2,2 max. [0.087 max.] 5,0 max. [0.197 max.] 2,6 [0.102] 2,5 [0.098] 5,0 max. [0.197 max.] 2,6 [0.102] 1.5 [0.059] 1.1 [0.043] MK24-x-2-OE N max. 2.2 [0.087] 0.75±0.05 0.75±0.05 [0.03±0.002] 3.64 [0.143] 7,5 [0.295] TAPE & REEL 2 .5 SOLDERING INFORMATION reflow soldering conditions according JEDEC norm J-STD-020C 1.75 4 5,7 [0.224] 40 s ø1 260 oC 7.5 183 oC 16 5 1. ø 125 oC Ramp up: max. 6K/s 2.1 4 www.meder.com 286 120 s 120-180 s Ramp down: max. 8/Ks MEDER electronic MK24 Series Micro-Miniature Reed Sensors for SMD Mounting CONTACT DATA All Data at 20° C Contact Form → Form A Sensitivity Range A Contact Ratings Conditions Sensitivity Range B Sensitivity Range C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Switching Power Any DC combination of V & A not to exceed their individual max.‘s 1 3 3 W Switching Voltage DC or peak AC 30 30 30 V Switching Current DC or peak AC 0.1 0.3 0.3 A Carry Current DC or peak AC 0.3 0.5 0.5 A Static Contact Resistance with 40% overdrive, start value 250 200 200 mΩ Insulation Resistance RH <45%, 100V test voltage 109 109 109 Ω Breakdown Voltage according to IEC 255-5 60 100 100 VDC Contact Operation Pull-in MK24-x-1 measured by MS150 1.8 - 4.5 3.0 - 5.8 4.1 - 7.0 mT Pull-in MK24-x-1 measured by KMS11 22 - 55 37 - 71 50 - 86 AT Pull-in MK24-x-2 measured by MS150 1.8 - 4.5 3.0 - 5.8 4.1 - 7.0 mT Pull-in MK24-x-2 measured by KMS11 22 - 55 37 - 71 50 - 86 AT Pull-in MK24-x-3 measured by MS150 2.1 - 5.3 3.3 - 7.0 4.3 - 8.6 mT Pull-in MK24-x-3 measured by KMS11 23 - 50 33 - 67 40 - 83 AT Environmental Data Shock Resistance 1/2 sinus wave duration 11 ms 15 30 30 Vibration Resistance From 10 - 2000 Hz 10 20 20 Ambient Temperature 10°C/ minute max. allowable -40 130 -40 130 -40 Stock Temperature 10°C/ minute max. allowable -50 130 -50 130 -50 Soldering Temperature 5 Sec. 260 260 g g 130 o C 130 o C 260 o C Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. www.meder.com 287 MEDER electronic MK24 Series Micro-Miniature Reed Sensors for SMD Mounting CONTACT DATA All Data at 20° C Contact Form → Contact Ratings Conditions Form B Min. Typ. Max. Unit Switching Power Any DC combination of V & A not to exceed their individual max.‘s 1 W Switching Voltage DC or peak AC 30 V Switching Current DC or peak AC 0.3 A Static Contact Resistance measured by 40% overdrive 200 mΩ Breakdown Voltage According to IEC 255-5 VDC 100 Contact Operation Lead option y 2, 3 Pull-in MK24-x-y-OE measured by MS150 mT Drop-out MK24-x-y-OE measured by MS150 mT Pull-in MK24-x-y-OE measured by KMS11 15 - 30 AT Drop-out MK24-x-y-OE measured by KMS11 5 - 20 AT Environmental Data Shock Resistance 1/2 sinus wave duration 11 ms 30 Vibration Resistance From 10 - 2000 Hz 20 Ambient Temperature 10°C/ minute max. allowable -40 Stock Temperature 10°C/ minute max. allowable -50 g g 130 o C 130 o C Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. Examples of actuating magnets for Form B: AlNiCo500 – Rectangular Magnet 4x1.5x0.5mm, anisotropy in length direction (L. 4mm) AlNiCo500 – Cylindrical magnet D2x8mm; anisotropy in length direction (L. 8mm) Other magnets are possible (Note: direct touch with high power magnet must be avoided, due to the danger of change in sensor magnetization.) www.meder.com 288