Additional Resources: Product Page 3D Model PCB Footprint date 11/22/2019 page 1 of 4 MODEL: CMT-1270S-SMT-TR DESCRIPTION: MAGNETIC BUZZER TRANSDUCER FEATURES externally driven SMT washable SPECIFICATIONS parameter conditions/description min typ max units Vo-p rated voltage 1.5 Vo-p operating voltage 1.2 2.0 Vo-p 0V current consumption at rated voltage, 2,400 Hz square wave, duty 60 mA rated frequency 2,400 Hz at 10 cm (A-weight), rated voltage, 2,400 Hz sound pressure level 80 85 dBA square wave, duty coil resistance 13.0 16.0 19.0 dimensions 12.8 x 9.8 x 7.0 mm weight 2.0 g material PPS (S-206) terminal SMT type (Au plating) operating temperature -20 70 C storage temperature -30 85 C RoHS yes Notes: 1. All specifications measured at 5~35C, humidity at 45~85%, under 86~106 kPa pressure, unless otherwise noted. SOLDERABILITY parameter conditions/description min typ max units reel storage at relative humidity <60% 30 C 2 reflow soldering see recommended reflow soldering profile 260 C 3 drying conditions bake at 40C for 24 hours Note: 2. It is recommended to reflow solder within 48 hours from opening vacuum packaging at a temperature <30C & relative humidity <60%. 3. When out of packaging for more than 48 hours. SMT Reflow Solder Profile (Pb Free) Peak Temp 260C 255C 20~40 sec 217C 200C 150C 60~180 sec 60~150 sec Time (sec) cuidevices.com Temperature (C)Additional Resources: Product Page 3D Model PCB Footprint CUI Devices MODEL: CMT-1270S-SMT-TR DESCRIPTION: MAGNETIC BUZZER TRANSDUCER date 11/22/2019 page 2 of 4 MECHANICAL DRAWING units: mm tolerance: 0.5 mm Land Pattern .DSWRQ 0DVNLQJ /DEHO Recommended PCB Layout Top View &07 6 &8, 3&% & 6( :HHN <HDU FREQUENCY RESPONSE CURVE 1 I L MEASUREMENT METHOD +VDC +2.5V 180 TR: 0 2SC1741AS cuidevices.com 31 3L 311 31 61 71 81 91 eC :1 21