VDE
ST
1a1b/2a 8A polarized power
relays
ST RELAYS
6. Automatic cleaning possible
The sealed design means that these
relays can undergo immersion in
automatic washing systems and are
suitable for automatic soldering. Even
in difficult environments, the contacts
remain reliable.
7. Easy to design PC board patterns
Features 4/10 dual-in-line terminals.
Because the lead spacing has a pitch
greater than 7.54 mm
.297 inch,
designers can make easy adjustments
with the width of the land size. This,
along with the large insulation
distance, simplifies the drawing of PC
board patterns.
8. To improve soldering efficiency,
preapplication of solder to the
terminals is recommended.
9. Sockets are available.
RoHS compliant
FEATURES
1. Even with small form factor,
sensitive enough for direct IC-
driving
The dimensions of this high-density 4-
gap balanced armature are 31 mm
×
14 mm
×
11 mm
1.220 inch
×
.551 inch
×
.433 inch.
Despite this small size,
high sensitivity is achieved by a
mechanism that incorporates high-
efficiency polarized magnetic circuits
along with our exclusive spring
alignment method. With an minimum
operating power of about 150 mW,
nominal operating power of 240 mW,
this relay can be directly driven by
transistor or chip controllers.
2. High switching capability
High contact pressure, low contact
bounce, and forced separation
structure that radically improves
resistance to contact welding
(1 Form A 1 Form B type equivalent to
TV-3). Strong against lamp inductive
loads, maximum switching capacity
has reached 3,040 VA (8A 380V AC).
3. High breakdown voltage – Optimal
for control in 250 V power circuits
High breakdown voltage has been
achieved. Between contacts and coil of
3,750 Vrms; Surge breakdown voltage
between coil and contact of 6,000 V,
and between open contacts of 1,200
Vrms mean that these relays are
suitable even for 250 V power circuit
control.
4. Improved stability
Conforms to all types of safety
standards.
Insulating distance of more than 3 mm
secured. Complies with Japan
Electrical Appliance and Material
Safety Law requirements for operating
200 V power supply circuits, and
conforms with UL, CSA and VDE
standards.
5. Latching types available
In addition to single side stable types,
convenient 2 coil latching types with
memory functions are also available.
Moreover, we offer 2 Form A
specifications which, with double pole
switching for applications such as 250
V power circuit switching, can enable
safer designs.
ORDERING INFORMATION
ST
Contact arrangement
1: 1 Form A 1 Form B
2: 2 Form A
Operating function
Nil: Single side stable
L2: 2 coil latching
Nominal coil voltage
DC 3, 5, 6, 9, 12, 24, 48 V
Contact material
F: AgSnO
2
type contact
Note: Certified by UL, CSA, VDE and SEV
F
ASCTB210E 201202-T
Panasonic Corporation
Automation Controls Business Unit
industrial.panasonic.com/ac/e/
ST
2. Specifications
Characteristics
Contact
Arrangement
Contact material
Contact resistance (Initial)
Max. switching power (resistive load)
Max. switching voltage
Rating
Max. switching current
Minimum operating power
Nominal operating power
Min. switching capacity (Reference value)*
1
Insulation resistance (Initial)
(at 25°C, 50% relative humidity)
Between open contacts
Breakdown voltage
(Initial)
Electrical
characteristics
Between contact sets
Between contact and coil
Surge breakdown voltage (Initial)*
2
Operate time [Set time] (at 20°C
68°F)
Release time [Reset time] (at 20°C
68°F)
Temperature rise (coil) (at 60°C
140°F)
Shock resistance
Mechanical
characteristics
Vibration resistance
Expected life
Mechanical
Electrical
Conditions for operation, transport and storage*
3
Max. operating speed
Unit weight
Functional
Destructive
Functional
Destructive
Item
1 Form A 1 Form B, 2 Form A
Au-flashed AgSnO
2
type
Max. 30 mΩ (By voltage drop 6 V DC 1A)
3,040 VA, 150 W
380 V AC, 250 V DC
8A
150mW (Single side stable, 2 coil latching)
240mW (Single side stable, 2 coil latching)
100 mA 5V DC
Min. 1,000MΩ (at 500V DC)
Measurement at same location as “Breakdown voltage” section.
1,200 Vrms for 1 min. (Detection current: 10 mA)
2,000 Vrms for 1 min. (Detection current: 10 mA)
3,750 Vrms for 1 min. (Detection current: 10 mA)
6,000 V (Between contact and coil)
Max. 15 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.)
Max. 10 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.) (without diode)
Max. 55°C
(By resistive method, nominal voltage applied to the coil; contact carrying current: 8A.)
Min. 196 m/s
2
(Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)
Min. 980 m/s
2
(Half-wave pulse of sine wave: 6 ms.)
10 to 55 Hz at double amplitude of 2 mm (Detection time: 10µs.)
10 to 55 Hz at double amplitude of 3 mm
Min. 10
7
(at 180 times/min.)
Min. 10
5
(8 A 250 V AC resistive) (ON : OFF = 1 s : 5 s)
Ambient temperature: –40°C to +60°C
–40°F to +140°F;
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
30 cps
Approx. 10g
.353 oz
Specifications
Conditions
Notes: *1. This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the
actual load.
*2. Wave is standard shock voltage of
±1.2×50µs
according to JEC-212-1981
*3. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage
conditions in NOTES.
REFERENCE DATA
1. Max. switching power
10
AC resistive load
Temperature rise,
°C
5
Current, A
AC inductive
load
(cosϕ=0.4)
DC resistive
load
2. Coil temperature rise
100
90
80
70
60 Contact current 8A
50
40
30
20
10
0A
3. Influence of adjacent mounting
40
30
Rated of change, %
20
10
0
-10
-20
-30
Pick-up voltage
Drop-out voltage
2
1
0.5
DC inductive
load
(L/R=40ms)
0.2
0
20
50
100 200 300
Voltage, V
600 1000
0
0.2
0.4
0.6
0.8
1.0
1.2
-40
5
10
15
20
Coil operating power, W
Inter-relay distance, mm
ASCTB210E 201202-T
Panasonic Corporation
Automation Controls Business Unit
industrial.panasonic.com/ac/e/
ST
DIMENSIONS
(mm
inch)
CAD Data
The CAD data of the products with a
CAD Data
mark can be downloaded from: http://industrial.panasonic.com/ac/e/
External dimensions
31.0
1.220
14
.551
PC board pattern (Bottom view)
2 coil latching
types only.
11.0
.433
0.3
.012
3.5
.138
7.62
.300
10.16
.400
1.0
.039
1
8
2
7
3
6
7.62
.300
0.3
.012
0.6 dia.
.024 dia.
4
5
0.5
.020
1.0
.039
1.0
.039
10.16
.400
8-1.4 dia.
8-.055 dia.
2.54
.100
2.54
.100
Tolerance:
±0.1
±.004
General tolerance:
±0.5
±.020
Schematic (Bottom view)
Single side stable
1 Form A 1 Form B
2 Form A
1
–
+
4
1
–
+
4
2 coil latching
1 Form A 1 Form B
2 Form A
1
– +
2
3
+ –
4
1
– +
2
3
+ –
4
8
7
6
5
8
7
6
5
8
7
6
5
8
7
6
5
(Deenergized condition)
(Reset condition)
SAFETY STANDARDS
UL/C-UL (Recognized)
File No.
Contact rating
E43028
8A 250V AC
1
/
4
HP 125, 250V AC
5A 30V DC
CSA (Certified)
File No.
Contact rating
LR26550 8A 250V AC
1
/
4
HP 125, 250V AC
etc.
5A 30V DC
VDE (Certified)
File No.
Contact rating
1017
8A 250V AC (cos
φ
=1.0)
4A 250V AC (cos
φ
=0.4)
5A 30V DC
TV rating (UL/CSA)
File No.
Rating
UL: E43028
CSA: LR26550
—
SEV
File No.
Contact rating
98-1 10289 8A 380V AC
NOTES
1. PC board patterns for 2 coil latching
types
When applying relays in power supply
operation circuits for finished products
regulated by the Electrical Appliance and
Material Safety Law, use the pattern
shown below.
2. Soldering should be done under the
following conditions:
1)
250°C
482°F
within 10s
300°C
572°F
within 5s
350°C
662°F
within 3s
2) For automatic cleaning, the boiling
method is recommended. Avoid
ultrasonic cleaning which subjects the
relays to high frequency vibrations, which
may cause the contacts to stick.
It is recommended that a fluorinated
hydrocarbon or other alcoholic solvents
be used.
3. When using, please be aware that
the a contact and b contact sides of 1
Form A and 1 Form B types may go on
simultaneously at operate time and
release time.
Terminal No. 1
2
3
4
For Cautions for Use.
Panasonic Corporation
Automation Controls Business Unit
industrial.panasonic.com/ac/e/
ASCTB210E 201202-T
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