249
ST-RELAYS
VDE
IC DRIVABLE PC BOARD
RELAY FOR FIELD LOAD
SWITCHING
mm
inch
11.3
.445
14
.551
31
1.220
FEATURES
Sealed to meet the combination pro-
cess of automatic wave soldering
and cleaning needs
Latching types available
High switching capacity and high
sensitivity in subminiature size
150 mW pick-up, 8 A inrush capacity:
51 A for 1a1b, 35 A for 2a
High shock and vibration resistance
Shock: 20 G, Vibration: 10 to 55 Hz at
double amplitude of 2 mm
SPECIFICATIONS
Contacts
Coil (polarized) (at 25
C
77
F
)
Remarks
* Specifications will vary with foreign standards certification ratings.
*
1
Measurement at same location as "Initial breakdown voltage" section
*
2
Detection current: 10 mA
*
3
Wave is standard shock voltage of
1.2
50
s according to JEC-212-1981
*
4
Excluding contact bounce time
*
5
Half-wave pulse of sine wave: 11ms; detection time: 10
s
*
6
Half-wave pulse of sine wave: 6ms
*
7
Detection time: 10
s
*
8
Refer to 5. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (Page 61).
Characteristics (at 25
C
77
F
50% Relative humidity)
Arrangement
1 Form A
1 Form B
2 Form A
Contact material
Gold flash over silver alloy
Initial contact resistance, max.
30 m
Rating
(resistive)
Max. switching power
2,000 VA, 150 W
Max. switching voltage
380 V AC, 30 V DC
Max. switching current
8 A
HP rating
1/4 HP 125, 250 V AC
Inrush current capability
51 A (TV-3 equivalence) for 1a1b
35 A (TV-1 equivalence) for 2a
Expected
life (min.
operations)
Mechanical (at 180 cpm)
10
7
Electrical
8 A 250 V AC (resistive)
10
5
5 A 30 V DC (resistive)
2
10
5
3 A 100 V AC (lamp)
3
10
4
--
1 A 100 V AC (lamp)
--
3
10
4
Single side stable
Nominal operating power
Approx. 240 mW
Latching
Nominal set and reset power
Approx. 240 mW
Max. operating speed
20 cpm (at rated load)
Initial insulation resistance*
1
1,000 M
(at 500 V DC)
Initial
breakdown
voltage*
2
Between contact sets
2,000 Vrms
Between open contacts
1,200 Vrms
Between contacts and coil
3,750 Vrms
Surge voltage between coil and
contact*
3
Min. 6,000 V
Operate time*
4
(at nominal voltage)
Max. 15 ms (Approx. 10 ms)
Release time (without diode)*
4
(at nominal voltage)
Max. 10 ms (Approx. 8 ms)
Set time*
4
(latching)
(at nominal voltage)
Max. 10 ms (Approx. 8 ms)
Reset time*
4
(latching)
(at nominal voltage)
Max. 10 ms (Approx. 8 ms)
Temperature rise
(at 60
C)
Max. 55
C with nominal coil voltage
and at 8 A switching current
Shock
resistance
Functional*
5
Min. 196 m/s
2
{20 G}
Destructive*
6
Min. 980 m/s
2
{100 G}
Vibration
resistance
Functional*
7
117.6 m/s
2
{12 G}, 10 to 55 Hz
at double amplitude of 2 mm
Destructive
176.4 m/s
2
{18 G}, 10 to 55 Hz
at double amplitude of 3 mm
Conditions for operation,
transport and storage*
8
(Not freezing and condens-
ing at low temperature)
Ambient
temp.
40
C to +60
C
40
Fto +140
F
Humidity
5 to 85% R.H.
Unit weight
Approx. 10g .
353 oz
TYPICAL APPLICATIONS
Sequence controllers, facsimiles, telephone controls, remote
control security devices and security equipment.
ORDERING INFORMATION
Ex. ST
Contact arrangement
1: 1 Form A 1 Form B
2: 2 Form A
Nil: Single side stable
L2: 2 coil latching
DC 3, 5, 6, 9, 12,
24, 48 V
Operating function
Coil voltage
1
L2
DC48V
(Note) Standard packing: Carton; 50 pcs., Case; 500 pcs.
ST
250
TYPES AND COIL DATA (at 20
C
68
F
)
Single side stable
2 coil latching
Part No.
Nominal
voltage,
V DC
Pick-up voltage,
V DC (max.)
Drop-out
voltage,
V DC (min.)
Maximum
allowable voltage,
V DC (60
C
140F
)
Coil resistance,
(
10%)
Nominal
operating
current, mA
1 Form A
1 Form B
2 Form A
ST1-DC3V
ST2-DC3V
3
2.4
0.3
4.5
38
75
ST1-DC5V
ST2-DC5V
5
4.0
0.5
7.5
105
47
ST1-DC6V
ST2-DC6V
6
4.8
0.6
9.0
150
40
ST1-DC9V
ST2-DC9V
9
7.2
0.9
13.5
360
25
ST1-DC12V
ST2-DC12V
12
9.6
1.2
18.0
600
20
ST1-DC24V
ST2-DC24V
24
19.2
2.4
36.0
2,400
10
ST1-DC48V
ST2-DC48V
48
38.4
4.8
72.0
9,000
4.7
Part No.
Nominal
voltage,
V DC
Set and reset
voltage,
V DC (max.)
Maximum allowable voltage,
V DC (60
C
140F
)
Coil resistance,
(
10%)
Nominal
operating
current, mA
1 Form A
1 Form B
2 Form A
ST1-L2-DC3V
ST2-L2-DC3V
3
2.4
4.5
40
75
ST1-L2-DC5V
ST2-L2-DC5V
5
4.0
7.5
110
47
ST1-L2-DC6V
ST2-L2-DC6V
6
4.8
9.0
155
37.5
ST1-L2-DC9V
ST2-L2-DC9V
9
7.2
13.5
360
25
ST1-L2-DC12V
ST2-L2-DC12V
12
9.6
18.0
640
18.8
ST1-L2-DC24V
ST2-L2-DC24V
24
19.2
36.0
2,400
9.8
ST1-L2-DC48V
ST2-L2-DC48V
48
38.4
72.0
10,200
4.7
DIMENSIONS
mm
inch
General tolerance:
0.2
.008
31.0
1.220
11.0
.433
7.62
.300
7.62
.300
10.16
.400
8
5
4
3
2
1
7 6
10.16
.400
14
.551
0.3
.012
3.5
.138
PC board pattern
(Copper-side view)
Tolerance:
0.1
.004
2 coil latching
types only.
8-DIA. 1.4
.055
2.54
.100
2.54
.100
Schematic (Bottom view)
Single side stable
1a1b
2a
(Deenergized condition)
1
4
5
6
7
8
+
1
4
5
6
7
8
+
2 coil latching
1a1b
1
2
5
6
7
8
+
3
4
+
(Reset condition)
Diagram shows the "reset" po-
sition when terminals 3 and 4
are energized. Energize termi-
nals 1 and 2 to transfer con-
tacts.
2a
1
2
+
3
4
+
5
6
7
8
Diagram shows the "reset" po-
sition when terminals 3 and 4
are energized. Energize termi-
nals 1 and 2 to transfer con-
tacts.
REFERENCE DATA
1. Max. switching power
2. Life curve
3. Coil temperature rise
Sample: ST1-DC24V
10
20
50
100 200 300
0.1
0.2
0.5
1
2
5
10
Voltage, V
Current, A
AC resistive load
DC resistive load
inductive load
AC
(cos
=0.4
)
10
20
50
100
200
500
1,000
1
2
3
4
5
6
7
8
9 10
Current, A
Life, 10 k operations
AC 250 V, 125 V resistive load
AC 250 V, 125 V inductive load
(Pf = 0.4)
0.1
0.2
0.3
0.4
0.5
60
50
40
30
20
10
0
Temperature rise,
C
Coil operating power, W
5 A
0 A
Contact current
8 A
ST
251
4. Influence of adjacent mounting
Sample: ST1-DC24V
5. Max. ambient temperature by operating
power
6. Contact reliability
(1)
(2)
(3)
(1) & (3) relays are energized.
Rated of change, %
Inter-relay distance, mm
5
10
15
20
20
10
0
10
20
Drop-out
Pick-up
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
10
20
30
40
50
60
70
80
90
100
110
120
Max. temperature,
C
Operating power, mW
No load
8 A carrying
250 V AC
0.1
0.2 0.3 0.5 0.7 0.9
0.4 0.6 0.8 1.0
2.0 3.0 5.07.0 9.0
10 A
m = 3.9
= 16.8
10
4
0.95
= 7.7
10
4
8 A
m = 3.5
= 3.3
10
5
0.95
= 1.4
10
5
No. of operations,
10
5
0.1
0.15
0.3
0.4
0.5
1.0
0.2
2.0
3.0
4.0
5.0
1.5
10.0
15.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
95.0
99.0
99.8
99.9
25.0
(%)
ST-Relay
250 V AC cos
= 1.0
0.33 Hz
.
.
ST relay socket
ST-SS
Solder terminal socket
ST-PS
PC board terminal socket
Specifications
Breakdown voltage
4,000 Vrms Coil/Contacts
2,000 Vrms Contacts/Contacts
Insulation resistance
More than 1,000 M
between terminals
Heat resistance
150
C (
302
F
) for 1 hr
Max. continuous current
10 A
Relay insertion life
15 times
DIMENSIONS
mm
inch
ST-PS
ST-SS
31.6
1.244
35.4
1.394
16.6
.654
8
1
7
2
6
3
5
4
14.6
.575
16.4
.646
10.16
.400
1.05
.041
0.3
.012
5.5
.217
4
.158
4.3
.169
0.27
.011
10.16
.400
7.62
.300
7.62
.300
31.6
1.244
35.4
1.394
16.6
.654
8
1
7
2
6
3
5
4
14.6
.575
16.4
.646
10.16
.400
2.3
.090
0.3
.012
5.5
.217
4
.158
5.3
.209
0.27
.011
10.16
.400
7.62
.300
7.62
.300
Precautions for use (socket)
1. PC board mounting method
PC board pattern
The terminal configuration is symmetrical
on the left and right, so an arrow mark
;
is stamped on the socket to prevent mis-
insertion. We recommend printing the
same arrow mark
;
on the component
mounting side (side opposite from pat-
tern) of the PC board. In this case, the ter-
minal configuration becomes the terminal
nos. noted near the drilling holes.
2. Chassis cutout
Chassis cutting dimensions
2.54
.100
8-1.5 DIA.
8-.060 DIA.
8
7
6
5
1
2
3
4
2.54
.100
Contact
terminal
interval
Coil
terminal
interval
15.0
0.2
.591
.008
32.5
0.1
1.280
.004
If the chassis hole is punched with a
press, set so the release R on the front
side (A side).
The range for chassis thickness is 0.6 to
2.2 mm .
024 to .087 inch
.
3. Relay mounting and removal
(1) Align the directions of the relay and socket.
Claw for chassis
fastening
Chassis t = 0.6 to 2.2
.024 to .087
Press
A side
Relay
(2) Insert the relay all the way in, so it is secure-
ly in place.
(3) Press the part indicated by A in the B direc-
tion, and fasten by placing the hook on the re-
lay.
(4). When removing the relay, completely re-
lease the hooks on both sides and pull the relay
out.
Hinge
mechanism
Relay case
cross-section
B
(Fastening complete)
(Before fastening)
A
For Cautions for Use, see Relay Technical Information (Page 48 to 76).
9/1/2000
All Rights Reserved, Copyright Matsushita Electric Works, Ltd.
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