Model: SBL 3.81 ; Daily defrosting cycles： 1-12 cycles adjustable ; Defrosting time： 2-60 minutes,adjustable      

Model: LT-DTAV40 ; Maximum Contact Switch Rating: 40A Resistive@120-240VAC . 2HP @ 240VAC; 1HP @ 120VAC . WIRING CONNECTIONS: Screw box lug terminals. Up to one #8AWG Wire ; ENVIRONMENTAL RATINGS: Operating Temperature Range: -40°F to 104°F(-40°C to 40°C)；Operating Humidity: 0- 95% RH, non-condensing ; ELECTRICAL LIFE: 50000 Operations at Full Load； DIMENSIONS:8.795" X 6.631" x 2.935"； SHIPPING WEIGHT: 3 Ibs.   

Model: QD-104 Input: Line Voltage: 120-240 VAC; Line Frequency: 50/60 HZ 

Model: QD-104 Input: Line Voltage: 24 VAC; Line Frequency: 50/60 HZ 

Model: QD-254 Input: Line Voltage: 18-240 VAC/VDC; Line Frequency: 50/60 HZ Output Ratings:Maximum: 1amps; Minimum: 20 mA; Inrush: 10 amps Time Delays (Adjustable Only) ON delay: 1-180 seconds；OFF delay: 12-390 seconds Replaces：Honeywell: S876A1016，ICM254； Watsco: PSTD-000-060W, PSTD-000-005W     

Model: QD-253 Input: Line Voltage: 18-240 VAC/VDC; Line Frequency: 50/60 HZ Output Ratings:Maximum: 1amps; Minimum: 20 mA; Inrush: 10 amps Time Delays (Adjustable Only) OFF delay: 12-390 seconds Replaces：Mars: 32393，ICM253；Gemline: IC216    

Model: QD-209 Input: Line Voltage: 18-240 VAC/VDC; Line Frequency: 50/60 HZ Output Ratings:Maximum: 1amps; Minimum: 40 mA; Inrush: 10 amps Time Delay:.03-10 minute adjustable   

Model: QD-208 Input: Line Voltage: 18-240 VAC/VDC; Line Frequency: 50/60 HZ Output Ratings:Maximum: 1amps; Minimum: 40 mA; Inrush: 10 amps Time Delay:.5 minute fixed  

Model: QD-207 Input: Line Voltage: 18-240 VAC/VDC; Line Frequency: 50/60 HZ Output Ratings:Maximum: 1amps; Minimum: 40 mA; Inrush: 10 amps Time Delay:.3 minute fixed