Time Delay Relays
Delay-on-Break
TDB / TDBH / TDBL SERIES
Relay Output, Delay-on-Break
Time Delay Relay
*
*8-pin models UL listed when used in
combination with P1011-6 socket only.
Description
8-PIN
The TDB Series combines accurate digital circuitry with isolated,
10A, DPDT or SPDT contacts in an 8-pin 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.
Wiring Diagram
11-PIN
8-PIN OCTAL SPDT
Features & Benefits
L1
N/L2
S1 = Initiate Switch
Relay contacts are isolated
FEATURES
3 time ranges available
(0.1s to 2.8h)
Microcontroller based
BENEFITS
Makes it versatile for use in many applications
Repeat Accuracy + / - 0.1% or 20ms, whichever is
greater; Setting Accuracy + / - 2% or 50ms,
whichever is greater
Provides visual indication of relay status
Provides first time setting accuracy
Allows control of loads for AC or DC voltages
11-PIN DPDT
LED indication
(select models)
DIP switch adjustment
L1
N/L2
Isolated output contacts
Ordering Information
MODEL
INPUT VOLTAGE
DELAY RANGE (SEC)
LED
TYPE PLUG/OUTPUT FORM
TDB120AL
TDB120ALD
TDB12D
TDB230AL
TDB24AL
TDB24DL
TDBH120AL
TDBH120ALD
TDBL120AL
TDBL120ALD
TDBL24DL
120VAC
120VAC
12VDC
230VAC
24VAC
24VDC/ 28VDC
120VAC
120VAC
120VAC
120VAC
24VDC/ 28VDC
1-1023 in 1s increments
1-1023 in 1s increments
1-1023 in 1s increments
1-1023 in 1s increments
1-1023 in 1s increments
1-1023 in 1s increments
10-10230 in 10s increments
10-10230 in 10s increments
0.1-102.3 in 0.1s increments
0.1-102.3 in 0.1s increments
0.1-102.3 in 0.1s increments
X
X
X
X
X
X
X
X
X
X
Octal (8-pin) plug, SPDT
11-pin plug, DPDT
Octal (8-pin) plug, SPDT
Octal (8-pin) plug, SPDT
Octal (8-pin) plug, SPDT
Octal (8-pin) plug, SPDT
Octal (8-pin) plug, SPDT
11-pin plug, DPDT
Octal (8-pin) plug, SPDT
11-pin plug, DPDT
Octal (8-pin) plug, SPDT
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tdb-tdbh-tdbl
Rev: 1-A-062116
Time Delay Relays
Delay-on-Break
TDB / TDBH / TDBL SERIES
Accessories
BZ1 Front Panel Mount Kit
Provides an easy method of through-the-panel
mounting of 8- or 11-pin plug-in timers, flashers,
and other controls.
NDS-8 Octal 8-pin Socket
8-pin 35mm DIN rail or surface mount. Rated
at 10A @ 300VAC. Surface mounted with two
#6 (M 3.5 x 0.6) screws or snaps onto a 35 mm
DIN rail. Uses PSC8 hold-down clips.
NDS-11 11-pin Socket
11-pin 35mm DIN rail or surface mount. Rated
at 10A @ 300VAC. Surface mounted with two
#6 (M 3.5 x 0.6) screws or snaps onto a 35 mm
DIN rail. Uses PSC11 hold-down clips.
PSC8 or PSC11 Hold-down Clips
Securely mounts plug-in controls in any position.
Provides protection against vibration. Use PSC8
with NDS-8 Octal Socket or PSC11 with NDS-11
Socket. Sold in pairs.
PSCRB8 Hold-down Brackets
Designed for use with P1011-6 socket. Securely
mounts 8-pin plug-in controls in any position,
and provides protection against vibration. Sold
in pairs.
P1011-6 Octal Socket for UL listing
8-pin surface mount socket with binder head
screw terminals. Rated 10A @ 600VAC.
Combination is UL Listed when used with
TDB Series timers. Use PSCRB8
Hold-down brackets.
Specifications
Time Delay
Type
Range**
Repeat Accuracy
Setting Accuracy
Reset Time
Recycle Time
Time Delay vs Temp.
& Voltage
Indicator
Initiate Time
Input
Voltage
Tolerance
12VDC & 24VDC/AC
110 to 230VAC/DC
AC Line Frequency
Power Consumption
Output
Type
Form
Rating
Life
Protection
Isolation Voltage
Polarity
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Weight
Digital integrated circuitry
0.1 - 102.3s in 0.1s increments
1 - 1023s in 1s increments
10 - 10,230s in 10s increments
±0.1% or 20ms, whichever is greater
±2% or 50ms, whichever is greater
≤ 50ms
≤ 150ms
±5%
LED indicates relay is energized
≤ 60ms
12, 24/28, or 110VDC; 24, 120, or 230VAC
-15% - 20%
-20% - 10%
50/60 Hz
≤ 3.25W
Electromechanical relay
SPDT or DPDT
10A resistive @ 120/240VAC & 28VDC;
1/3 hp @ 120/240VAC
Mechanical - 1 x 10
7
; Electrical - 1 x 10
6
≥ 1500V RMS input to output
DC units reverse polarity protected
Plug-in socket
H
81.3 mm (3.2”);
W
60.7 mm (2.4”);
D
45.2 mm (1.8”)
Octal 8-pin plug-in or 11-pin plug-in
Digi-Set Binary Switch Operation
-20° to 65°C / -30° to 85°C
≅
6 oz (170 g)
Function Diagram
DELAY-ON-BREAK (OFF-DELAY)
** For CE approved applications, power must be removed from the unit when a switch position
is changed.
V = Voltage
S1 = Initiate Switch
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
t = Incomplete
Time Delay
R = Reset
= Undefined
Time
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tdb-tdbh-tdbl
Rev: 1-A-062116
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