Albright SU280A-1581M 24Vdc magnetically latched contactor with auxiliary microswitch, intermittent.
- The SU280 series of contactors has been designed for direct current loads, particularly motors as used on small electric vehicles such as industrial trucks, airport tractors, etc., they have double-breaking contacts with Silver-alloy contact tips, which are weld resistant, hardwearing and have excellent conductivity.
- Manet latched version with yellow warning label.
- 2028-551A top hat bracket fitted, right-hand side.
- Auxiliary microswitch fitted.
Associated Products
- 2156-184 Contact kit
- 2155-352 Auxiliary switch kit.
- 2159-47 Mounting bracket.
- 2155-165 Mounting bracket.
- 2159-167A Mounting bracket.
Dimensions
- Height including terminals and coil base cap: 132mm.
- Coil width: 45mm.
- Cap width: 67mm.
- Cap depth: 47mm.
About Intermittent (Int.) SU280 Solenoids
Intermittent contactors by design are predominantly used for hydraulic functions on vehicles, they have a stronger coil which allows them to make and break quicker than continuous solenoids.
The contactors have double-breaking main contacts with Silver-alloy tips, which are weld resistant, hardwearing and have excellent conductivity. They are easy to install, with M5 tapped holes in the switch frame together with a range of available mounting brackets. Mounting can be vertical or horizontal, when vertical the M10 contact studs should point upwards.
Magnetic Latching: The contact position is secured with the use of a permanent magnet within the assembly. The coil requires a pulse to close the contacts and a reverse polarity pulse to operate the armature and open the contacts, but otherwise remains in the last energised state without the need for power. It should be noted, therefore, these are not failsafe.
Interrupted Current: The opening and closing on load with frequent switching (resulting in increased contact resistance). |
Uninterrupted Current: No or infrequent load switching requirements (maintains a lower contact resistance). |
Specifications
Device Type | NO - SP - ST |
Voltage | 24V D.C. |
Coil Type | Intermittent |
Amps | 250 Amps |
Coil Resistance (Ohms) | 17 |
Pull-In Voltage (V) | 14.0 Max. |
Drop Out Voltage (V) | 14.0 Max. |
Coil Power Dissipation (W) | 33.88 |
Typical Pull-In Time | 30ms |
Typical Voltage Drop Per Pole Across New Contacts At 100A | 40mV |
Operating Ambient Temperature | -40 to +60℃ |
Weight | 755g |
Application | Interrupted | Uninterrupted |
Thermal Current Rating | 250A | 350A |
Intermittent Current Rating: |
30% Duty | 450A | 640A |
40% Duty | 395A | 555A |
50% Duty | 355A | 495A |
60% Duty | 325A | 450A |
70% Duty | 300A | 420A |