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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | SSAC / Littelfuse |
| Manufacturer Product Number | TDS24DD |
| Description | TDR; 1...1,023 s; DIP; 24/28V DC; No LED; 2C DPDT; Single Shot |
| Datasheet | Download Datasheet |
The Littelfuse SSAC TDS24DD is a digital single shot timer for 24/28 V DC, with isolated DPDT relay contacts rated 8 A resistive at 120/240 V AC. Its delay is adjustable from 1 to 1,023 seconds in 1 s steps with DIP switches.
Input voltage must be applied before and during timing. A momentary or maintained closure of the initiate switch energizes the output relay for the set time; opening or reclosing the switch during timing has no effect. For control panels and OEM equipment. DC units are reverse-polarity protected.
Output: 2C DPDT relay, 8 A resistive at 120/240 V AC; 1/3 hp at 120/240 V AC (isolated contacts). It has no LED indicator. Repeat accuracy: ±0.1%. Setting accuracy: ±2%; ±5% over temperature and voltage. Reset time: 150 ms. Supply tolerance: -15% / +20% of nominal; 50/60 Hz. Power: 3.25 W max. Life: 10,000,000 operations mechanical, 1,000,000 electrical.
It plugs into an 11 pin Magnal socket (OT11-PC or RB11-PC (UL listing)). It operates from -20 to +65 °C and stores from -30 to +85 °C. Approvals: UL 508 (E57310), with socket.
| Category | |
| Manufacturer | SSAC / Littelfuse |
| Model | TDS |
| Output Technology | Electromechanical Relay |
| Timing Function | Single Shot |
| Delay Time | 1...1,023 s |
| Time Ranges | 1-1,023 s in 1 s steps |
| Timing Adjustment Method | DIP switches, digital set |
| Options | No LED |
| Timing Initiate Method | Control Switch |
| Status Indicator | None |
| Contact Configuration | 2C DPDT |
| Output Rating | 8 A resistive at 120/240 V AC; 1/3 hp at 120/240 V AC (isolated contacts) |
| Input Voltage | 24/28V DC |
| Termination Style | Plug In |
| Mounting Type | Socketable |
| Socket Family | 11 Pin Magnal |
| Required Socket | OT11-PC or RB11-PC (UL listing) |
| Operating Temperature | -20...+65 °C (-30...+85 °C) |
| Approvals | UL 508 (E57310), with socket |
| Setting Accuracy (%) | ±2%; ±5% over temperature and voltage |
| Repeatability (%) | ±0.1% |
| Recovery Time (ms) | 150 |
| Mechanical Life | 10,000,000 cycles (1,000,000 cycles) |
| Input Operating Range | -15% / +20% of nominal; 50/60 Hz |
| Rated Power | 3.25 W max |