Features
■ Surface Mount SMA package
■ Standoff Voltage: 8.5 to 58 volts
■ Power Dissipation: 400 watts
■ RoHS compliant*
■ AEC-Q101 compliant**
Applications
■ Protection of power buses
■ Protection of I/O interfaces
■ Overvoltage transient protection
■ Telecom, computer, industrial and
consumer electronics applications
Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)
SMAJ-Q Transient Voltage Suppressor Diode Series
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**”Q” part number suffix indicates 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
Parameter Symbol Value Unit
Minimum Peak Pulse Power Dissipation (TP = 1 ms) (Note 1,2) PPK 400 Watts
Peak Forward Surge Current
8.3 ms Single Half Sine Wave Superimposed on Rated Load
(JEDEC Method) (Note 3)
IFSM 40 Amps
Operating Temperature Range TJ-55 to +150 °C
Storage Temperature Range TSTG -55 to +150 °C
1. Non-repetitive current pulse, per Pulse Waveform graph and derated above TA = 25 °C per Pulse Derating Curve.
2. Mounted on 5.0 mm2 (0.03 mm thick) copper pads to each terminal.
3. 8.3 ms Single Half-Sine Wave duty cycle = 4 pulses maximum per minute (unidirectional units only).
General Information
Bourns offers Transient Voltage Suppressor Diodes for surge and ESD protection applications, in compact chip package DO-214AC (SMA)
size format. The Transient Voltage Suppressor series offers a choice of Working Peak Reverse Voltage from 8.5 V up to 58 V. Typical fast
response times are less than 1.0 picosecond from 0 V to Breakdown Voltage.
Bourns®
minimizes roll away.
*RoHS COMPLIANT
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 520 390 • 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
www.bourns.com/docs/legal/disclaimer.pdf.
SMAJ-Q Transient Voltage Suppressor Diode Series
Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)
Unidirectional Device Bidirectional Device Breakdown Voltage
VBR (Volts)
Working
Peak
Reverse
Voltage
Maximum
Reverse
Leakage
@ VRWM
Maximum
Reverse
Voltage
@ IRSM
Maximum
Reverse
Surge
Current
Part No. Marking Part No. Marking Min. Max. @ IT (mA) VRWM (V) IR (μA) VRSM (V) IRSM (A)
SMAJ8.5CA-Q TTQ 9.44 10.4 1.0 8.5 20.0 14.4 27.8
SMAJ12A-Q IEQ SMAJ12CA-Q UEQ 13.3 14.7 1.0 12 1.0 19.9 20.1
SMAJ13A-Q IGQ SMAJ13CA-Q UGQ 14.4 15.9 1.0 13 1.0 21.5 18.6
SMAJ14A-Q IKQ SMAJ14CA-Q UKQ 15.6 17.2 1.0 14 1.0 23.2 17.2
SMAJ15A-Q IMQ SMAJ15CA-Q UMQ 16.7 18.5 1.0 15 1.0 24.4 16.4
SMAJ16A-Q IPQ SMAJ16CA-Q UPQ 17.8 19.7 1.0 16 1.0 26.0 15.3
SMAJ17A-Q IRQ SMAJ17CA-Q URQ 18.9 20.9 1.0 17 1.0 27.6 14.5
SMAJ18A-Q ITQ SMAJ18CA-Q UTQ 20.0 22.1 1.0 18 1.0 29.2 13.7
SMAJ20A-Q IVQ SMAJ20CA-Q UVQ 22.2 24.5 1.0 20 1.0 32.4 12.3
SMAJ22A-Q IXQ SMAJ22CA-Q UXQ 24.4 26.9 1.0 22 1.0 35.5 11.3
SMAJ24A-Q IZQ SMAJ24CA-Q UZQ 26.7 29.5 1.0 24 1.0 38.9 10.3
SMAJ26A-Q JEQ SMAJ26CA-Q VEQ 28.9 31.9 1.0 26 1.0 42.1 9.5
SMAJ28A-Q JGQ SMAJ28CA-Q VGQ 31.1 34.4 1.0 28 1.0 45.4 8.8
SMAJ30A-Q JKQ SMAJ30CA-Q VKQ 33.3 36.8 1.0 30 1.0 48.4 8.3
SMAJ33A-Q JMQ SMAJ33CA-Q VMQ 36.7 40.6 1.0 33 1.0 53.3 7.5
SMAJ36A-Q JPQ SMAJ36CA-Q VPQ 40.0 44.2 1.0 36 1.0 58.1 6.9
SMAJ40A-Q JRQ SMAJ40CA-Q VRQ 44.4 49.1 1.0 40 1.0 64.5 6.2
SMAJ43A-Q JTQ SMAJ43CA-Q VTQ 47.8 52.8 1.0 43 1.0 69.4 5.8
SMAJ45A-Q JVQ SMAJ45CA-Q VVQ 50.0 55.3 1.0 45 1.0 72.7 5.5
SMAJ48A-Q JXQ SMAJ48CA-Q VXQ 53.3 58.9 1.0 48 1.0 77.4 5.2
SMAJ51A-Q JZQ SMAJ51CA-Q VZQ 56.7 62.7 1.0 51 1.0 82.4 4.9
SMAJ54A-Q REQ SMAJ54CA-Q WEQ 60.0 66.3 1.0 54 1.0 87.1 4.6
SMAJ58A-Q RGQ SMAJ58CA-Q WGQ 64.4 71.2 1.0 58 1.0 93.6 4.3
Notes: 1. denotes a 5 % tolerance unidirectional device.
2. denotes a 5 % tolerance bidirectional device.
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.
3312 - 2 mm SMD Trimming Potentiometer
100
75
50
25
0
050
25 75 100 150125
Ambient Temperature (
Peak Pulse Power Derating in Percent of
Peak Power or Current
°C)
10 x 1000 Waveform as Defined
by R.E.A.
1.0
0.6
0.8
0.4
0.2
0.0
050
25 75 100 150125
TL - Lead Temperature (°C)
Steady State Power Dissipation (W)
CJ - Junction Capacitance (pF)
Peak Forward Surge Current (Amps)
45
30
35
40
25
15
20
5
10
0
110 100
Number of Cycles at 60 Hz
Pulse Width 8.3 ms
Single Half Sine-Wave
100
50
0
0 1.0 2.0 3.0 4.0
T, Time (ms)
IP, Peak Pulse Current (%)
TA=25 °C
TP
TR=10 µs
Half value= IRSM
2
Peak value (IRSM)
Pulse width (TP)
is defined as that point
where the peak current
decays to 50 % of IPSM.
10 x 1000 waveform
as defined by R.E.A.
10000
10
1
110 100 1000
VBR - Reverse Breakdown Voltage (V)
10
1.0
0.1
0.1 µs 1.0 µs 10 µs 10 ms
Td, Pulse Width (Seconds)
PPPM - Peak Pulse Power (kW)
100 µs 1.0 ms
100
1000
TJ = 25 °C
f = 1.0 MHz
Vsig = 50 mVp-p
Unidirectional
@ VR
Bidirectional
@ VR
Bidirectional
v-0v
Unidirectional
v-0v
TA = 25 °C
Non-repetitive
Pulse Waveform
Shown in Pulse Waveform Graph
SMAJ-Q Transient Voltage Suppressor Diode Series
Performance Graphs
Peak Pulse Power Derating Curve Maximum Non-Repetitive Surge Current
Pulse Waveform Typical Junction Capacitance
Pulse Rating Curve Steady State Power Derating Curve
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.
3312 - 2 mm SMD Trimming Potentiometer
Product Dimensions
SMAJ-Q Transient Voltage Suppressor Diode Series
Recommended Footprint
Case ...........................................Molded plastic per UL Class 94V-0
Polarity....................... Cathode band indicates unidirectional device
No cathode band indicates bidirectional device
DIMENSIONS: MM
(INCHES)
B
G
F D
C
H
E
AA
C
B
Dimension SMA (DO-214AC)
A3.99 - 4.50
(0.157 - 0.157)
B2.54 - 2.79
(0.100 - 0.110)
C1.25 - 1.65
(0.049 - 0.065)
D0.15 - 0.31
(0.006 - 0.112)
E 4.93 - 5.28
(0.194 - 0.208)
F 0.203 MAX.
(0.008)
G 1.98 - 2.29
(0.078 - 0.090)
H 0.76 - 1.52
(0.030 - 0.060)
DIMENSIONS: MM
(INCHES)
Dimension SMA (DO-214AC)
A (Max.) 2.70
(0.106)
B (Min.) 2.10
(0.083)
C (Min.) 1.27
(0.050)
How to Order
SMAJ 12 CA - Q
Package
SMAJ = SMA/DO-214AC
Working Peak Reverse Voltage
12 = 12 VRWM (Volts)
A = 5 % Tolerance Unidirectional Device
CA = 5 % Tolerance Bidirectional Device
Q = AEC-Q101 Compliant, 13-inch Reel
QH = AEC-Q101 Compliant, 7-inch Reel
Typical Part Marking
YWW
XXX
DATE CODE:
Y = LAST
DIGIT OF
YEAR
WW = WEEK
NUMBER
MANUFACTURER’S
TRADEMARK
DEVICE ID
Moisture Sensitivity Level ................................................................1
............................................................. 3B
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.
.......
.......
....... ..............
....... ..............
PA
F
ET
120 °
D2
DD
1
W1
C
Index Hole
P
0
P
1
W
B
10 pitches (min.)
Direction of Feed
10 pitches (min.)
End
Trailer Device Leader
Start
d
CDDFN5-0504N - TVS/Steering Diode Array
Packaging Information
The product will be dispensed in tape and reel format (see diagram below).
Devices are packed in accordance with EIA 481
DIMENSIONS: MM
(INCHES)
REV. 11/18
SMAJ-Q Transient Voltage Suppressor Diode Series
Item Symbol SMA (DO-214AC)
7-Inch Reel 13-Inch Reel
Carrier Width A 2.90 ± 0.20
(0.114 ± 0.008)
Carrier Length B 5.50 ± 0.20
(0.217 ± 0.008)
Carrier Depth C 2.26 ± 0.20
(0.089 ± 0.008)
Sprocket Hole d 1.50 ± 0.10
(0.061 ± 0.004)
Reel Outside Diameter D 178
(7.008)
330
(12.992)
Reel Inner Diameter D1 50.0
(1.969) MIN.
Feed Hole Diameter D2 13.0 ± 0.20
(0.512 ± 0.008)
Sprocket Hole Position E 1.75 ± 0.10
(0.069 ± 0.004)
Punch Hole Position F 5.50 ± 0.05
(0.217 ± 0.002)
Punch Hole Pitch P 4.00 ± 0.10
(0.157 ± 0.004)
Sprocket Hole Pitch P0 4.00 ± 0.10
(0.157 ± 0.004)
Embossment Center P1 2.00 ± 0.05
(0.079 ± 0.002)
Overall Tape Thickness T 0.30 ± 0.10
(0.012 ± 0.004)
Tape Width W 12.00 ± 0.30
(0.472 ± 0.012)
Reel Width W118.4
(0.724) MAX.
Quantity per Reel -- 1,000 5,000
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.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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