©2009 Littelfuse, Inc.
Revised: August 30, 2009 9:30 AM
P4SMA Automotive Series
Surface Mount – 400W > P4SMA Automotive Series
P4SMA Automotive Series
Automotive Transient Voltage Suppression Diodes
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/P4SMAAUTO.html for current information.
Description
Agency Approvals
P4SMA Automotive Series
Features
• Halogen-Free
• RoHS compliant
• For surface mounted
applications to optimize
board space
• Low prole package
• Built-in strain relief
• Typical maximum
temperature coefcient
ΔVBR = 0.1% x VBR@25°C x ΔT
• Glass passivated chip
junction
• 400W peak pulse power
capability at 10×1000µs
waveform, repetition rate
(duty cycles):0.01%
• Fast response time:
typically less than 1.0ps
from 0V to BV min
• Excellent clamping
capability
• Low incremental surge
resistance
• Typical IR less than 1µA
above 12V
• High Temperature
soldering guaranteed:
260°C/40 seconds at
terminals
• Plastic package has
Underwriters Laboratory
Flammability 94V-O
• Matte Tin Lead–free Plated
Applications
TVS devices are ideal for the protection of I/O Interfaces,
VCC bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
The P4SMA Automotive series is designed specically
to protect sensitive automotive equipment from voltage
transients.
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power Dissipation at
TA=25ºC by 10x1000µs waveform
(Fig.1)(Note 1), (Note 2)
PPPM 400 W
Power Dissipation on innite heat
sink at TA=50OCPM(AV) 3.3 W
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3) IFSM 40 A
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
only
VF3.5V V
Operating Junction and Storage
Temperature Range T
J, TSTG -65 to 150 °C
Typical Thermal Resistance Junction
to Lead RuJL 30 °C/W
Typical Thermal Resistance Junction
to Ambient RuJA 120 °C/W
Notes:
1. Non-repetitive current pulse , per Fig. 3 and derated above TA = 25OC per Fig. 2 .
2. Mounted on 0.2x0.2” (5.0 x 5.0mm) copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
device only, duty cycle=4 per minute maximum.
AGENCY AGENCY FILE NUMBER
E230531
RoHS
Revised: August 30, 2009 9:24 AM
©2009 Littelfuse, Inc.
P4SMA Automotive Series
Surface Mount – 400W > P4SMA Series
Automotive Transient Voltage Suppression Diodes
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/P4SMAAUTO.html for current
information.
Electrical Characteristics
Part
Number
(Uni)
Part
Number
(Bi)
Marking Reverse
Stand off
Voltage VR
(Volts)
Breakdown
Voltage VBR
(Volts) @ IT
Test
Current
IT
(mA)
Maximum
Clamping
Voltage VC
@ Ipp
(V)
Maximum
Peak
Pulse
Current Ipp
(A)
Maximum
Reverse
Leakage IR
@ VR
(µA)
Agency
Approval
UNI BI MIN MAX
P4SMA12AAUTO P4SMA12CAAUTO 12AA 12CA 10.20 11.40 12.60 1 16.7 24.6 5 X
P4SMA13AAUTO P4SMA13CAAUTO 13AA 13CA 11.10 12.40 13.70 1 18.2 22.5 1 X
P4SMA15AAUTO P4SMA15CAAUTO 15AA 15CA 12.80 14.30 15.80 1 21.2 19.3 1 X
P4SMA16AAUTO P4SMA16CAAUTO 16AA 16CA 13.60 15.20 16.80 1 22.5 18.2 1 X
P4SMA18AAUTO P4SMA18CAAUTO 18AA 18CA 15.30 17.10 18.90 1 25.5 16.1 1 X
P4SMA20AAUTO P4SMA20CAAUTO 20AA 20CA 17.10 19.00 21.00 1 27.7 14.8 1 X
P4SMA22AAUTO P4SMA22CAAUTO 22AA 22CA 18.80 20.90 23.10 1 30.6 13.4 1 X
P4SMA24AAUTO P4SMA24CAAUTO 24AA 24CA 20.50 22.80 25.20 1 33.2 12.3 1 X
P4SMA27AAUTO P4SMA27CAAUTO 27AA 27CA 23.10 25.70 28.40 1 37.5 10.9 1 X
P4SMA30AAUTO P4SMA30CAAUTO 30AA 30CA 25.60 28.50 31.50 1 41.4 9.9 1 X
P4SMA33AAUTO P4SMA33CAAUTO 33AA 33CA 28.20 31.40 34.70 1 45.7 9.0 1 X
P4SMA36AAUTO P4SMA36CAAUTO 36AA 36CA 30.80 34.20 37.80 1 49.9 8.2 1 X
P4SMA39AAUTO P4SMA39CAAUTO 39AA 39CA 33.30 37.10 41.00 1 53.9 7.6 1 X
P4SMA43AAUTO P4SMA43CAAUTO 43AA 43CA 36.80 40.90 45.20 1 59.3 6.9 1 X
P4SMA47AAUTO P4SMA47CAAUTO 47AA 47CA 40.20 44.70 49.40 1 64.8 6.3 1 X
The avaliable parts are “A” type only, the parts without A (VBR is ± 10%) is not avaliable.
©2009 Littelfuse, Inc.
Revised: August 30, 2009 9:30 AM
P4SMA Automotive Series
Surface Mount – 400W > P4SMA Automotive Series
P4SMA Automotive Series
Automotive Transient Voltage Suppression Diodes
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/P4SMAAUTO.html for current information.
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
0.1
1
10
0.000001 0.00001 0.0001 0.001
td-Pulse Width (sec.)
PPPM-Peak Pulse Power (kW)
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
IPPM- Peak Pulse Current, % IRSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM ( )
0
20
40
60
80
100
0 25 50 75 100 125 150 175
TA-Ambient temperature (ºC)
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage %
1
10
100
1000
10000
1.0 10.0 100.0 1000.0
Cj (pF)
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
Uni-directional V=0V
Bi-directional V=0V
VBR - Reverse Breakdown Voltage (V)
Bi-directional @VR
Uni-directional @VR
0
0.2
0.4
0.6
0.8
1
1.2
0 25 50 75 100 125 150 175
TA - Ambient Temperature (ºC)
PM(AV), Steady State Power Dissipation
(W)
Figure 1 - Peak Pulse Power Rating Figure 2 - Pulse Derating Curve
Figure 3 - Pulse Waveform Figure 4 - Typical Junction Capacitance
Figure 5 - Steady State Power Dissipation Derating Curve
0
5
10
15
20
25
30
35
40
45
1 10
100
I
FSM
- Peak Forward Surge Current (A)
Number of Cyles at 60 Hz
Figure 6 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
Revised: August 30, 2009 9:24 AM
©2009 Littelfuse, Inc.
P4SMA Automotive Series
Surface Mount – 400W > P4SMA Series
Automotive Transient Voltage Suppression Diodes
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/P4SMAAUTO.html for current
information.
Physical Specifications
Weight 0.002 ounce, 0.061 gram
Case JEDEC DO-214AC. Molded plastic body
over glass passivated junction
Polarity Color band denotes positive end
(cathode) except bidirectional
Terminal Matte Tin-plated leads, Solderable per
JESD22-B102D
Environmental Specifications
Temperature Cycle JESD22-A104
Pressure Cooker JESD 22-A102
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Thermal Shock JESD22-A106
Dimensions
Soldering Parameters
Temperature (T)
Time (t)
Ts(min)
Ts(max)
TL
TP
ts
Preheat
tL
tp
Ramp-up Critical Zone
TL to TP
Ramp-down
t 25˚C to Peak
25˚C
Reflow Condition Lead–free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 180 secs
Average ramp up rate (Liquidus Temp
(TL) to peak 3°C/second max
TS(max) to TL - Ramp-up Rate 3°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Time (min to max) (ts)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP)8 minutes Max.
Do not exceed 280°C
Dimensions Inches Millimeters
Min Max Min Max
A 0.049 0.065 1.250 1.650
B 0.157 0.177 3.990 4.500
C0.100 0.110 2.540 2.790
D 0.078 0.090 1.980 2.290
E 0.030 0.060 0.780 1.520
F - 0.008 - 0.203
G 0.194 0.208 4.930 5.280
H 0.006 0.012 0.152 0.305
I 0.070 - 1.800 -
J 0.082 - 2.100 -
K- 0.090 - 2.300
L 0.082 - 2.100 -
DO-214AC (SMA)
Cathode Band
A
D
EG
F
H
C
B
(all dimensions in mm)
I
L
K
J
Solder Pads
©2009 Littelfuse, Inc.
Revised: August 30, 2009 9:30 AM
P4SMA Automotive Series
Surface Mount – 400W > P4SMA Automotive Series
P4SMA Automotive Series
Automotive Transient Voltage Suppression Diodes
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/P4SMAAUTO.html for current information.
Part Numbering System
VOLTAGE
BI-DIRECTIONAL
5% VOLTAGE TOLERANCE
SERIES
P4SMA XXX C A AUTO
Packaging
Part number Component
Package Quantity Packaging
Option Packaging Specification
P4SMAxxxXXAUTO DO-214AC 5000 Tape & Reel – 12mm/13” tape EIA STD RS-481
Part Marking System
F
XXXX
Marking Code
Littelfuse Logo
Cathode Band
Revised: August 30, 2009 9:24 AM
©2009 Littelfuse, Inc.