Three phase, 25 or 35 amps per leg, din
rail contactor
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Features
- Maximum Surge Survival™
technology -- triple layer, voltage surge protection
- Green LED for input
status
- Thermally optimized heat sink
permits edge-to-edge installations on a din rail
- Built-in snubber
circuit
- Zero crossing activation -- low
EMI, low noise to nearby electronics
- Internal 50A SCR thyristors for
high inrush capability
- 4000 volt isolation, 1400Vpk
blocking voltage
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- 1000 volt / microsecond
immunity
- Highest thermal efficiency --
less than 1.2 watts per amp switched, per leg
- CE, UL recognized, CSA
- Industry standard A1, A2, L1,
T1, L2, T2, L3, T3 terminal numbers
- High density design permits more
amps per square inch
- 3Ø = 25 amps per leg,
2Ø using L1/T1 and L3/T3 = 35 amps per leg.
- Optional: 3 internal MOVs for a
fourth layer of surge survival
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Part
Numbers
DDA3-6V75T-H up to 75 amps TOTAL; 25A on
three legs or 35A on 2 legs; 660V max, 10-60 VDC activated 
DDA3-5V75T-H up to 75 amps TOTAL; 25A on
three legs or 35A on 2 legs; 570V max, three internal MOVs, 10-60 VDC activated
DAA3-6V75T-H up to 75 amps TOTAL; 25A on
three legs or 35A on 2 legs; 660V max, 100-280 VAC activated
DAA3-5V75T-H up to 75 amps TOTAL; 25A on
three legs or 35A on 2 legs; 570V max, three internal MOVs, 100-280 VAC
activated
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Specifications
| Part
Number |
Line Voltage
Range (VAC) |
Load Current Range (A
RMS) |
Min Control Voltage &
Current Draw |
Max Control Voltage &
Current Draw |
Must Release Voltage
|
| |
| DC
activated |
| DDA3-6V75T-H |
24-660 |
.10-25 (3 leg) or 35 (2
leg) |
10VDC/3.5mA |
60VDC/6mA |
1 VDC |
| DDA3-5V75T-H |
24-660 |
.10-25 (3 leg) or 35 (2
leg) |
10VDC/3.5mA |
60VDC/6mA |
1 VDC |
| |
| AC
activated* |
| DAA3-6V75T-H |
24-660 |
.10-25 (3 leg) or 35 (2
leg) |
100VAC/25mA |
280VAC/25mA |
20VDC/2MA |
| DAA3-5V75T-H |
24-660 |
.10-25 (3 leg) or 35 (2
leg) |
100VAC/25mA |
280VAC/25mA |
20VDC/2MA |
| *
Typically, does NOT need a burden resistor when activated by a triac output
controller. |
| |
| Internal
MOVs |
The
5V models use three internal MOVs that are similar to the Littelfuse Harris
V575 LA80B Metal Oxide Varistors. The use of MOVs is encouraged in situations
where there are frequent voltage surges such as near motor starter
applications. |
| Installation |
The
DDA3 can be installed on a din rail or directly on a metal panel. The heat sink
must be installed so the air flows up and through the fins. |
| Off-State
dv/dt |
1000
v/µs |
| Isolation |
4000
volts isolation |
| I²T fuse
|
50A
or less, for example: Bussman FWP50A14F, FWC32A10F, FWC20A10F. Ferraz Shawmut
B093910, M330015, K330013 |
| Turn-on
time |
<8.3 ms at 60hz |
| Turn-off
time |
<8.3 ms at 60hz |
| Power
terminals |
Will
accept #24-#10 AWG wire. Torque: 7-9 inch lbs. |
| Control
terminals |
Will
accept #24-#14 AWG wire. Torque: 4 inch lbs. |
| Terminology |
The
word "leg" refers to a switched AC power line. A three phase application may
use 3 switched lines or 2 switched lines. |
| Motor
starter |
When
used as a motor starter, use the "5V" feature in order to include the internal
MOVs. The Power-io contactor can be typically be used for: <10 FLA amps per
phase, 3 HP for most 208/230 volt motors, 7.5 HP for most 460 volt
motors. |
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