Littelfuse TDB12D, TDB Series, Relay-Output, Delay-on-Break Timer, 12VDC, 1–1023s Time Setting, 8 Pins, SPDT Contact Form
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The TDB Series combines accurate digital circuitry with isolated, 10A, DPDT or SPDT contacts in an 8 or 11-pin plug-in package. The TDB Series features DIP switch selectable time delays ranging from 0.1-10,230 seconds in three ranges. The TDB Series is the product of choice for custom control panel and OEM designers.
Operation (Delay-on-Break)
Input voltage must be applied to the input before and during timing. Upon closure of the initiate switch, the output relay is energized. 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.
Pre-order 6-8 Weeks
*UL Listed when used with Part Number OT08-PC, RB08-PC, OT11-PC, or RB11-PC manufactured by Custom Connector Corp.
Note: Manufacturer's recommended screw terminal torque for the OT series sockets is 12 in-lbs.
| Time Delay | |
| Type | Digital integrated circuitry |
| Range |
0.1–102.3 s in 0.1 s increments 1–1023 s in 1 s increments 10–10,230 s in 10 s increments |
| Repeat Accuracy | ±0.1 % |
| Setting Accuracy | ±2 % |
| Reset Time | ≤ 150 ms |
| Time Delay vs Temp. & Voltage | ±5 % |
| Indicator | LED indicates relay is energized |
| Initiate Time | ≤ 60 ms |
| Input | |
| Voltage | 12, 24/28 V dc; 24, 120, or 230 V ac |
| Tolerance |
12 V dc & 24 V dc/ac -15% – 20% 120 & 230 V ac -20% – 10% |
| AC Line Frequency | 50/60 Hz |
| Power Consumption | ≤ 3.25W |
| Output | |
| Type | Electromechanical relay |
| Form | SPDT or DPDT |
| Rating |
8 A resistive @ 120/240 V ac; 1/3 hp @ 120/240 V ac |
| Life | Mechanical - 1 x 107 ; Electrical - 1 x 10⁶ |
| Protection | |
| Isolation Voltage | ≥ 1500 V rms input to output |
| Polarity | Dc units reverse polarity protected |
| Mechanical | |
| Mounting | Plug-in socket |
| Dimensions |
H 44.45 mm (1.75”); W 60.33 mm (2.38”); D (with socket) 104.78 mm (4.13”) |
| Termination | Octal 8-pin plug-in or 11-pin plug-in |
| Environmental | |
| Operating/Storage Temperature | -20 °C to 65 °C / -30 °C to 85 °C |
| Safety Marks UL (socket required)* | UL 508 (E57310) |
| Weight | ≅ 4 oz (113 g |