Series ST
Single Output to 75A 600 Vac
AC/DC Control
Part Numbers
Package &
Chip Type
ST
Line
Voltage1
24
48
Switch
Type2
D
ST
24
A
ST
48
A
Feature3
Output
Current
12
25
40
50
75
25
50
25
-02
-16
-22
FEATURES/BENEFITS
• Industry standard package
• Internal MOV (certain models)
• Control LED (certain models)
• AC or DC control available
• Excellent thermal performance
• Tight zero-cross window for low EMI
• High immunity to surges
Part Number Example: ST48A25-22
NOTES
1) Line Voltage (nominal): 24 = 240 Vac; 48 = 480 Vac
2) Switch Type: D = Zero-cross turn-on; A = AC control,
Zero-cross turn-on
3) Feature: -02 = Control LED: Standard on all ST48D
Only available on ST24D 12A and 40A (standard)
-16 = Internal MOV: Available only on ST24D 25A and 50A
-22 = 24 Vac Control
MECHANICAL SPECIFICATION
DESCRIPTION
The Series ST single-phase relays are designed for
high-power applications. The design incorporates an
SCR or triac output. The Series ST relays utilize optical
isolation to protect the control from load transients.
Control LED is available on certain models. All Series
ST relays are zero crossing. Internal MOV is also
available on ST24D 25A and 50A models.
1.06 (27)
(±.02)
.9 (22.8)
1.1 (28)
.77 (19.6)
4-
3+
1.02 (25.8)
1.87 (47.6)
2~
1 (25.4)
TOLERANCE: ±.01 (0.3)
WEIGHT: 3.18 oz. (90g)
APPLICATIONS
• Heating control
• Industrial and process control
• On/Off controls of AC equipment
.2 (5.1)
1.7 (43.2)
M4
1~
.26 (7.5)
2.29 (58.2)
Ø.19 (Ø4.7)
1.75 (44.5)
APPROVALS
All models are UL recognized.
UL File Number: E128555.
M3
Figure 1 — ST relays, dimensions in inches (mm)
TYPICAL APPLICATION
Line
Voltage
Line Protection
–
4–
Line Protection
Line Protection
–
1
Control
+
4–
–
1
+
2
• 1–2 can be changed
• SSR must be mounted on a heat sink
Figure 2a — ST relays
© 2003 TELEDYNE RELAYS
LED
3+
+
2
1
3+
2
• 1–2 can be changed
• SSR must be mounted on a heat sink
• 1–2 can be changed
• SSR must be mounted on a heat sink
Load
4–
Control
Control
3+
Line
Voltage
Line
Voltage
Load
Figure 2b — ST -02 option relays
(800) 284-7007 • www.teledynerelays.com
Load
Figure 2c — ST -16 option relays
ST 1
ST\032003\Q1
Series ST
CONTROL CHARACTERISTICS
INPUT (CONTROL) SPECIFICATION
Input Type
Min
Max
Units
ST24
D
4
30
Vdc
A
90
240
Vac/Vdc
ST48
D
5
30
Vdc
A
17
80
Vac/Vdc
3
30
mA
Input Current (mA)
Control Range
Input Current Range
ST24DXX-02
4
48
mA
ST24A
3
8
mA
ST48D
ST48A25-22
0
5
46
mA
50
26
mA
45
Must Turn-Off Voltage
D
1
Vdc
ST24
A
15
Vac
ST48
A
3
Vac
4
6
8
10 12 14 16 18 20 22 24 26 28 30
Figure 3a — ST24D relays
5.6
ST
2
Control Voltage (V)
40
Input Current (mA)
ST24D
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
35
30
25
20
15
10
5
0
0
Input Resistance (Typical)
D
1000
Ohms
ST
D-02
600
Ohms
ST
A
3000
Ohms
Reverse Voltage Protection
S
D
S
A
30
V
NA
4
6
8 10 12 14 16 18 20 22 24 26 28 30
Control Voltage (V)
Figure 3b — ST -02 relays
8
Input Current (mA)
ST
2
6
4
2
OUTPUT (LOAD) SPECIFICATION
Input Type
Min
Max
Units
0
0
Operating Range
ST24
12
280
Vrms
ST48
24
600
Vrms
20
40
60
80
100 120 140 160 180 200 220 240
Control Voltage (V)
Figure 3c — ST24A relays
Peak Voltage
ST24
600
Vpeak
ST48
1200
Vpeak
Load Current Range (Resistive)
ST 2
12A output current
.005
12
Arms
25A output current
.005
25
Arms
40A output current
.005
40
Arms
50A output current
.005
50
Arms
75A output current
.005
75
Arms
Input Current (mA)
30
25
20
15
10
5
0
0
10
20
30
40
50
60
70
80
Control Voltage (V)
Figure 3d — ST24A25-22
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2003 TELEDYNE RELAYS
ST\032003\Q1
Series ST
OUTPUT (LOAD) SPECIFICATION (continued)
Input Type
Min
Max
SURGE CURRENT
150
Units
Non-Repetitive
12A output current
120
A
25A output current
240
A
40A output current
350
A
50A output current
550
A
75A output current
1000
A
Apeak
Maximum Surge Current Rating (Non-Repetitive)
100
50
Repetitive with initial Tj = 70°C
0
0.01
0.1
1
10
t(s)
Figure 4a — 12A output current
250
On-State Voltage Drop
12A output current
1.3
V
25A output current
1.2
V
40A output current
1.4
V
50A output current
1.45
V
Apeak
200
150
Non-Repetitive
100
50
Repetitive with initial Tj = 70°C
0
0.01
0.1
1
10
t(s)
ST48D50-02
1.4
V
75A output current
1.4
V
Figure 4b — 25A output current
400
S
±12
D/A
Vac
Apeak
300
Zero-Cross Window (Typical)
Non-Repetitive
200
100
Repetitive with initial Tj = 70°C
Off-State Leakage Current (60Hz)
All relays
0
3
0.01
mA
0.1
1
10
t(s)
Figure 4c — ST24D40-02
Turn-On Time (60 Hz)
ST
D
8.3
ms
ST
A
24.9
ms
Apeak
600
400
Non-Repetitive
200
Repetitive with initial Tj = 70°C
Turn-Off Time (60 Hz)
0
ST
D
8.3
ms
ST
A
24.9
ms
0
0.1
1
10
t(s)
Figure 4d — 50A output current and ST48D40-02
1500
All relays
500
V/µs
Maximum di/dt (Non-Repetitive)
All relays
50
A/µs
Apeak
Off-State dv/dt
1000
Non-Repetitive
500
Repetitive with initial Tj = 70°C
0
0.01
0.1
1
10
t(s)
Figure 4e — 75A output current
Operating Frequency Range
All relays
0.1
440
Hz
NOTES:
1. Electrical specifications at 25°C unless otherwise specified.
2. For 800Hz applications, contact factory.
3. For additional/custom options, contact factory.
OPTIONAL ADD-ONS
Please order add-ons separately:
• -12 — Thermal pad installed.
• -14 — Plastic touch-proof cover.
© 2003 TELEDYNE RELAYS
(800) 284-7007 • www.teledynerelays.com
ST 3
ST\032003\Q1
Series ST
T case
max (°C)
OUTPUT (LOAD) SPECIFICATION (continued)
0.95°C/W
40
Units
288
A2S
ST48 25A output current
265
2
AS
40A output current
612
A2S
50A output current
1500
A2S
5000
2
ST24 25A output current
75A output current
Power Dissipation (W)
A2S
2°
/W
C/
/W
72
70
°C
12A output current
2.
30
C
75
I2t for Match Fusing (<8.3ms)
6°
W
Full on state
0.
1.
35
C/
Max
1°
Min
1.
Input Type
80
W
90
25
20
100
50% duty cycle
6°C/W
15
10
5
0
2
0
4
6
8
10
12
14
16
18
20
22
24
26
0
10
20
30
Load Current (Arms)
AS
40
50
60
70
80
90 100 110 120
Ambient Temperature (°C)
Figure 5c — 25A output current
ENVIRONMENTAL SPECIFICATION
Power Dissipation (W)
ST24D40-02
2500
Vrms
ST48D40-02
3300
Vrms
50A output current
3300
Vrms
75A output current
3300
Vrms
W
Vrms
C/
2500
1.
40
6°
2.
35
70
5°
25A output current
/W
Vrms
0.5
2500
°C
12A output current
75
Output-Case Isolation
/W
Vrms
C
4000
50
/W
°C
Full on state
1°
Input-Output Isolation
100
45
65
0.
–40
100
°C
55
1.
Operating Temperature
60
°C
–40
T case
max (°C)
Units
95
Storage Temperature
Max
0.
Min
75
80
C/
2°
W
C/
30
85
90
W
95
50% duty cycle
100
25
20
6°C
15
/W
10
5
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 0
10
20
Load Current (Arms)
30 40
50
60
70 80
90 100 110 120
Ambient Temperature (°C)
Figure 5d — ST24D40-02
T case
max (°C)
100
4°C/W
Full on state
90
14
12
Power Dissipation (W)
Power Dissipation (W)
16
40
50% duty cycle
°C
95
20
100
10
80
/W
85
90
/W
95
/W
2.2
30
W
85
1.6
50
75
C/
18
80
°C
3°
1.1°C/W
2.2°C/W
60
0.
20
1.1
Full on state
°C
/W
75
70
95
/W
°C
T case
max (°C)
1.6°C/W
0.
80
°C
55
THERMAL CHARACTERISTICS
70
75
0.
0.
90
°C
100
/W
6°C/W
10
6°C/W
0
8
50% duty cycle
0
5
10
15
20
25 30
35
40
45
50
55
60
0
10
20 30
40
50 60
70 80
90 100 110 120
6
Load Current (Arms)
Ambient Temperature (°C)
4
Figure 5e— 50A output current and ST48D40-02
2
0
0
1
2
3
4
5
6
7
8
9
10
11
12
0 10
Load Current (Arms)
20
30 40
50
60
70
80 90 100 110 120
Ambient Temperature (°C)
T case
max (°C)
Figure 5a — 12A output current
130
70
0.3
/W
0.
Full on state
Power Dissipation (W)
0.
90
75
95
°C
°C
80
70
50% duty cycle
1.
1°
1.6
50
40
85
/W
90
/W
C/
60
80
95
100
W
Power Dissipation (W)
/W
110
100
0.
/W
°C
°C
55
120
75
Full on state
0.
90
°C
/W
30
°C/
20
6°C/W
°C
°C
80
1.
70
50% duty cycle
1°
C/
/W
80
85
/W
90
95
W
60
1.
50
40
100
6°
2.2
30
C/
°C
W
/W
6°C/W
20
2. 2
95
/W
0.3
0.
130
100
75
°C
70
140
0.
55
110
T case
max (°C)
75
°C
120
10
0
W
0
10
20
30
40
50
60
70
80
90 0
Load Current (Arms)
10
10 20 30 40 50 60 70 80 90 100 110 120
Ambient Temperature (°C)
Figure 5f — 75A output current
0
0
10
20
30
40
50
60
70
80
90 100 110 0 10 20 30 40 50 60 70 80 90 100 110120
Load Current (Arms)
Ambient Temperature (°C)
Figure 5b — ST48D12-02
ST 4
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2003 TELEDYNE RELAYS
ST\032003\Q1