© 2003 TELEDYNE RELAYS (800) 284-7007 • www.teledynerelays.com SD 1
SD\032003\Q1
Dual Output to 50A 600 Vac
DC Control
FEATURES/BENEFITS
• Designed for all types of loads
• Dual output (two relays in one package)
• Faston terminals
• Connector for common or individual control
• Tight zero-cross window for low EMI
• High immunity to surges
DESCRIPTION
The Series SD dual-phase relays are designed for all
types of loads. The design incorporates two relays in a
single package. The relays utilize optical isolation to
protect the control from load transients. High-current
models are excellent for motor and phase angle control.
The 50A 600 Vac models are available with common
control connector or individual control connector.
APPLICATIONS
• Motor control
• Heating control
• Uninterruptible power supplies
• Light dimmers
• Industrial and process control
• On/Off controls of AC equipment
APPROVALS
All models are UL recognized.
UL File Number: E128555.
Part Number Description
SD24R50-06 12-280 Vac
SD24R50 12-280 Vac
SD24D50-06 12-280 Vac
SD48D40-06 24-500 Vac
SD48D50A 24-600 Vac
SD48D50A2 24-600 Vac
Part Number Explanation
Series SD
NOTES
1) Line Voltage (nominal): 24 = 240 Vac; 48 = 480 Vac
2) Switch Type: R = Random turn-on; D = Zero-cross turn-on;
3) Features: -06 = Faston terminals
A = Common control adapter
A2 = Individual control adapter
SD
R
50
48
-06
Series
Line Voltage
1
Output Current - Amps
Switch Type
2
Feature
3
INPUT (CONTROL) SPECIFICATION
Min Max Units
Control Range
SD24 4 30 Vdc
SD48D40-06 5 30 Vdc
SD48D50XX 10 30 Vdc
Input Current Range
All relays (See Fig. 3) 3 mA
Must Turn-Off Voltage
All relays 1 Vdc
Input Resistance (Typical)
SD24R50-06 1000 Ohms
SD48D40-06 1000 Ohms
SD48D50A 1400 Ohms
SD48D50A2 1800 Ohms
Reverse Voltage Protection
All relays 30 V
+
–
–
+
outputinput
input output
L
1
T
1
L
2
T
2
1
2
nput
nput
BLOCK DIAGRAM
Figure 1b — SD48D40-06
Figure 1a — All SD relays except SD48D40-06
