Littelfuse ORB120A25, ORB Series, 120VAC, Off-Delay Time Delay Relay SPDT (1 Form C) 3 Sec ~ 300 Sec Delay 10A @ 120/240VAC Chassis Mount
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The ORB Series’ open PCB construction offers the user good economy without sacrificing performance and reliability. The output relay is available in isolated, 10A, DPDT or SPDT forms. The time delay may be ordered as factory fixed, onboard knob, or external adjustment. All connections are 0.25 in. (6.35 mm) male quick connect terminals.
Operation (Delay-on-Make)
Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened (trailing edge triggered). The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied.
Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.
Specifications
| Time Delay | |
| Type | Analog Circuitry |
| Range | 0.05 - 300s in 5 adjustable ranges or fixed |
| Repeat Accuracy | ±2% or 20ms, whichever is greater |
| Tolerance (Factory Calibration) |
Adjustable: guaranteed range Fixed: ±10% |
| Recycle Time | ≤ 50ms |
| Initiate Time | ≤ 70ms |
| Time Delay vs Temp. & Voltage | ≤ ±10% |
| Input | |
| Voltage | 24, or 230VAC |
| Tolerance |
24VAC -15% - 20% 120 & 230VAC -20% - 10% |
| AC Line Frequency | 50/60 Hz |
| Power Consumption | 2.25W |
| Output | |
| Type | Electromechanical relay |
| Form | Isolated, SPDT or DPDT |
| Rating |
10A resistive @ 120/240VAC & 28VDC; 1/3 hp @ 120/240VAC |
| Life | Mechanical - 1x10⁷ ; Electrical - 1x10⁶ |
| Protection | |
| Isolation Voltage | ≥1500V RMS input to output |
| Mechanical | |
| Mounting | Surface mount with four #6 (M3.5 x 0.6) screws |
| Dimensions |
H 53.8 mm (2.12”) W 93.7 mm (3.69”) D 47.8 mm (1.88”) |
| Termination | 0.25 in. (6.35 mm) male quick connect terminals |
| Environmental | |
| Operation/Storage Temperature | -20° to 60°C / -30° to 85°C |
| Weight | ≅ 2.7 oz (77 g) |