286/287 Series - Squre Base Time Delay Relay
SPDT - 3PDT, 10 Amp
The 286 on delay and 287 off delay are square base, bladed versions of time delay relays. Both AC and
DC versions are available. On delays can have up to three poles. The timing circuit is a fully encapsulated
E13324 precision RC (resistor – capacitor) network typically used in applications where oscillators are not desired.
Fixed time and externally adjustable versions are available. The package on this series is typically socket
mounted. It can also be panel mounted allowing direct connections to terminals with quick-connects or
soldering.
GENERAL SPECIFICATIONS (@ 25° C)
Timing:
Functions Available
Time Range
Timing Adjustment
Timing Repeatability
(Constant voltage and temperature)
Reset Time maximum
Input Pulse Length minimum
Contacts:
Contact Configuration
Contact Material
Contact Rating
120 / 240VAC Resistive
28VDC Resistive
Motor 120VAC
Motor 240VAC
Minimum Contct Load
Contact Resistance, Initial
Coil:
Coils Available
Nominal Coil Power
Input Voltage Tolorance -AC
Input Voltage Tolorance -DC
Transient Protection
Reverse Polarity Protection
Duty
Dielectric Strength:
Across Open Contacts
Between Mutally Insulated Points
Insulation Resistance
Temperature:
Operating
Storage
Life Expectancy:
Electrical (full load operations)
Mechanical (no load operations)
Miscellaneous:
Mounting Position
Mating Socket
Enclosure
Weight
On-delay, Off-delay
Up to 300 seconds
Knob
3%
150mS
50mS
SPDT, DPDT, 3PDT
Silver Alloy
10 Amp / 10 Amp
10 Amp
1/3Hp
1/2Hp
500mW
100 milliohms max @ 6VDC, 1A
AC and DC
2.75VA 2W
85% to 110% of nominal
80% to 110% of nominal
Yes
Yes
Continuous
500Vrms
1500Vrms
1,000 Mohms min @ 500VDC
-20 to 70°C (-4 to 158°F)
-40 to 85°C (-40 to 185°F)
100,000
10,000,000
Any
SK-SQB11-DS
Clear Polycarbonate
5.0oz (142 grams)
7/11
www.struthers-dunn.com
(843) 664-3303
Timer / Sensor - Time Delay & Sensor Relays
5 - 25 Amp
Ordering Code 286 XAX
S
eries
C
001
F 120VAC
286/287 Wire Diagram
External
switch
287 Model
Only
286 - On delay
287 - Off delay
1
4
2
5
3
6
Contact Arrangement
XAX (SPDT) - (1 form C)
XBX (DPDT) - (2 form C)
XCX (3PDT) - (3 form C)
Mounting Options
C - Plug-in
C1 - Bracket
CS1 - Top stud
C2 - Side tapped hole
CS2 - Side stud
Timing Ranges
0.1 - 1.0 Seconds - CODE 001
0.2 - 2.0 Seconds - CODE 002
1.0 - 10 Seconds - CODE 010
3.0 - 30 Seconds - CODE 033
6.0 - 60 Seconds - CODE 060
18 - 180 Seconds - CODE 180
30 - 300 Seconds - CODE 300
Adjustment Options
Adjustment knob - No CODE
Fixed - Specify fixed time - CODE F
Remote adjustment - CODE R
Operating Voltage
AC: 24, 48, 120, 240, (Add VAC)
DC: 12, 24, 48, 115-125 (Add VDC)
7
A
8
9
B
Input
286XAX
1
4
2
5
3
6
A
B
External
switch
287 Model
Only
Input
286XBX
287XBX
1
4
2
5
3
6
7
A
8
9
B
Input
286XCX
On delay
286XCX
www.struthers-dunn.com
(843) 664-3303
7/12
Section 7
7
8
9
286/287 Series - Squre Base Time Delay Relay
SPDT - 3PDT, 10 Amp
Dimensions Shown in inches & (millimeters)
Outline Dimensions
Plug-in, Adjustable Timing
0.65
(16.5)
Side Stud or Tapped Hole, Adjustable Timing
0.16
(4.2)
0.65
(16.5)
Anti-rotation tab
fits 0.177 DIA.
hole (No. 16
Drill)
2.89
(73.4)
0.43
(11.0)
2.89
(73.4)
6-32 Stud
0.26
(6.7)
1.40
(35.6)
1.51
(38.4)
0.26
(6.7)
1.40
(35.6)
0.83
(21.2)
1.51
(38.4)
1.48
(37.6)
6-32 Tapped hole
or 6-32 stud
Plug-in Fixed or Remote Timing
1.39
(35.3)
1.48
(37.6)
Bracket Fixed or Remote Timing
1.39
(35.3)
0.17
(4.3)
1.89
(47.9)
1.89
(47.9)
2.48
2.75
(63.1) (69.8)
0.26
(6.7)
0.26
(6.7)
286 Series
7/13
www.struthers-dunn.com
(843) 664-3303
Timer / Sensor - Time Delay & Sensor Relays
5 - 25 Amp
Dimensions Shown in inches & (millimeters)
Outline Dimensions
Side Stud, Fixed or remote Timing
0.14
(3.6)
1.39
(35.3)
1.48
(37.6)
Anti-rotation tab fits
0.177 DIA. hole
(No. 16 Drill)
Side Tapped Hole, Fixed or Remote Timing
1.39
(35.3)
0.43
(11.0)
1.48
(37.6)
Anti-rotation tab
fits 0.177 DIA. hole
(No. 16 Drill)
0.12
(3.17)
6.-32 Stud
0.34
(8.7)
0.83
(21.2)
0.26
(6.7)
1.89
(47.9)
0.83
(21.2)
0.28
(7.14)
6-32 Tapped hole
Top Stud Fixed or Remote Timing
6-32 Stud
0.12
(3.2)
0.37
(9.52)
0.28
(7.1)
0.43
(11.1)
1
4
2
5
8
3
6
9
B
1.87 Max.
(47.6)
1.37 Max.
(34.9)
1.50 Max.
(38.1)
A
7
All terminals 0.18 x 0.02
(4.7 x 0.5)
287 Series
www.struthers-dunn.com
(843) 664-3303
7/14
Section 7
Note:
Bracket & top stud not
available with adjustable
timing
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