Bourns offers Transient Voltage Suppressor Diodes for surge and ESD protection applications, in compact chip package DO-218 size format.
The Transient Voltage Suppressor series offers a choice of Working Peak Reverse Voltage from 16 V up to 43 V. Typical fast response times
are less than 1.0 picosecond from 0 V to Breakdown Voltage.
Absolute Maximum Ratings (@ T
A
= 25 °C Unless Otherwise Noted)
Parameter
Maximum Peak Pulse Power Dissipation (10/1000 µs)
Maximum Peak Pulse Power Dissipation (10/10000 µs)
Power Dissipation with Infinite Heatsink (Tc = 25 °C)
Operating Temperature Range
Storage Temperature Range
Symbol
P
PK
P
D
T
J
P
PK
Value
6600
5200
8
-55 to +175
-55 to +175
Unit
W
W
W
°C
°C
AE
C
T
STG
Electrical Characteristics (@ T
A
= 25 °C Unless Otherwise Noted)
Unidirectional Device
Bidirectional Device
Breakdown Voltage
V
BR
(Volts)
Working
Peak
Reverse
Voltage
Maximum
Reverse
Leakage
@ V
RWM
Maximum
Reverse
Voltage
@ I
RSM
Maximum
Reverse
Surge
Current
Part No.
SM8S16A
SM8S17A
SM8S18A
SM8S20A
SM8S22A
SM8S24A
SM8S26A
SM8S28A
SM8S30A
SM8S33A
SM8S36A
SM8S40A
SM8S43A
Part No.
SM8S16CA
SM8S17CA
SM8S18CA
SM8S20CA
SM8S22CA
SM8S24CA
SM8S26CA
SM8S28CA
SM8S30CA
SM8S33CA
SM8S36CA
SM8S40CA
SM8S43CA
Min.
17.80
18.90
20.00
22.20
24.40
26.70
28.90
31.10
33.30
36.70
40.00
44.40
47.80
Max. @ I
T
(mA)
19.70
20.90
22.10
24.50
26.90
29.50
31.90
34.40
36.80
40.60
44.20
49.10
52.80
5
5
5
5
5
5
5
5
5
5
5
5
5
V
RWM
(V)
16.0
17.0
18.0
20.0
22.0
24.0
26.0
28.0
30.0
33.0
36.0
40.0
43.0
I
R
(μA)
10
10
10
10
10
10
10
10
10
10
10
10
10
V
RSM
(V)
26.0
27.6
29.2
32.4
35.5
38.9
42.1
45.4
48.4
53.3
58.1
64.5
69.4
I
RSM
(A)
254.0
239.0
226.0
204.0
186.0
170.0
157.0
145.0
136.0
124.0
114.0
102.0
95.0
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**”Q” part number suffix for automotive and other applications requiring appropriate AEC-Q101 compliance.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SM8S-Q
Transient Voltage Suppressor Diode Series
Performance Graphs
Load Dump Power Characteristics
6000
Steady State Power Dissipation
8.0
5000
Power Dissipation (W)
Load Dump Power (W)
6.0
4000
3000
4.0
2000
2.0
1000
0
0
25
50
75
100
125
150
175
0
0
50
100
150
200
Case Temperature, Tc (°C)
(10 ms Exponential Waveform)
Pulse Waveform
150
tr = 10 µs
T
J
= 25 °C
Pulse width (td)
is defined as the point
where the peak current
decays to 50 % of I
PPM
Case Temperature (°C)
Maximum Non-Repetitive Surge Current
10000
Input Peak Pulse Current (%)
100
Peak value (I
PPM
)
Half value = I
PPM
50
t
d
0
0
10
20
30
40
1000
10
100
Reverse Surge Power (W)
Pulse Width (ms) - 1/2 I
PP
Exponential Waveform
t - Time (ms)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SM8S-Q
Transient Voltage Suppressor Diode Series
Performance Graphs
Typical Transient Thermal Impedance
100
Typical Junction Capacitance
100,000
Transient Thermal Impedance (°C/W)
10
R
θJA
1
R
θJC
C J - Junction Capacitance (pF)
T
J
= 25 °C
f = 1.0 MHz
V
sig
= 50 mV
p-p
10,000
Measured at Zero Bias
0.1
Measured at
Stand-Off Voltage V
WM
1,000
10
15
20
25
30
35
40
45
0.01
0.01
0.1
1
10
100
t - Pulse Width (s)
V
WM
- Reverse Stand-Off Voltage (V)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SM8S-Q
Transient
SMD Trimming Potentiometer
3312 - 2 mm
Voltage Suppressor Diode Series
Performance Graphs
ISO 16750-2 Test A (10 Pulse) - SM8S24A
0
1
2
3
td: 100 ms
td: 200 ms
td: 400 ms
ISO 7637-2 5a (1 Pulse) - SM8S24A
0
1
2
3
td: 100 ms
td: 200 ms
td: 400 ms
Ri Ohm
4
5
6
7
8
79
90
UA: 14 V
101
Ri Ohm
4
5
6
7
8
65
76
UA: 13.5 V
87
V Vs
ISO 16750-2 Test A (10 Pulse) - SM8S36A
0
1
2
3
td: 100 ms
td: 200 ms
td: 350 ms
V Vs
ISO 7637-2 5a (1 Pulse) - SM8S36A
0
1
2
3
td: 100 ms
td: 200 ms
td: 350 ms
Ri Ohm
4
5
6
7
8
151
176.5
UA: 28 V
202
Ri Ohm
4
5
6
7
8
123
148.5
UA: 27 V
174
V Vs
V Vs
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SM8S-Q
Transient Voltage Suppressor Diode Series
Product Dimensions
A
D
Dimension
A
B
C
15.5 ± 0.5
(0.610 ± 0.02)
10.0 ± 0.5
(0.394 ± 0.02)
4.85 ± 0.15
(0.191 ± 0.006)
13.5 ± 0.2
(0.531 ± 0.008)
8.5 ± 0.2
(0.335 ± 0.008)
9.0 ± 0.3
(0.354 ± 0.012)
3.0 ± 0.5
(0.118 ± 0.02)
2.0 ± 0.5
(0.079 ± 0.02)
Value
B
E
F
D
G
C
E
F
G
H
MM
(INCHES)
Metal Heatsink
H
DIMENSIONS:
Recommended Footprint
I
Dimension
K
I
J
K
3.5 ± 0.3
(0.138 ± 0.012)
10.0 ± 0.5
(0.394 ± 0.02)
2.0 ± 0.3
(0.079 ± 0.012)
2.7 ± 0.3
(0.106 ± 0.012)
9.0 ± 0.3
(0.354 ± 0.012)
14.5 ± 0.4
(0.571 ± 0.016)
Value
J
L
M
N
L
M
N
DIMENSIONS:
MM
(INCHES)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
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