SMF28A Littelfuse, SMF28A Datasheet

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SMF28A

Manufacturer Part Number
SMF28A
Description
TVS Diodes - Transient Voltage Suppressors 28V 200W 4.4A 5% Unidirectional
Manufacturer
Littelfuse
Series
SMFr
Datasheet

Specifications of SMF28A

Product Category
TVS Diodes - Transient Voltage Suppressors
Rohs
yes
Polarity
Unidirectional
Breakdown Voltage
31.1 V to 34.4 V
Clamping Voltage
45.4 V
Peak Surge Current
4.4 A
Package / Case
SOD-123
Minimum Operating Temperature
- 55 C
Maximum Operating Temperature
+ 150 C
Channels
1 Channel
Mounting Style
SMD/SMT
Peak Pulse Power Dissipation
200 W
Termination Style
SMD/SMT

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Transient Voltage Suppression Diodes
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/04/13
SMF Series
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above T
Surface Mount – 200W > SMF Series
Functional Diagram
Maximum Ratings and Thermal Characteristics
(T
Parameter
Peak Pulse Power Dissipation at
T
Thermal Resistance Junction- to-
Ambient
Thermal Resistance Junction- to-
Lead
Operating and Storage Temperature
Range
A
=25ºC by 10x1000µs (Note 1)
A
=25°C unless otherwise noted)
Cathode
Uni-directional
Bi-directional
Uni-directional
Symbol
T
R
R
P
J,
THJ-A
THJ-L
PPM
T
STG
A
=25ºC per Fig. 3.
-55 to 150
Value
200
220
100
Anode
°C/W
°C/W
Unit
W
°C
Description
The SMF series is designed specifically to protect sensitive
electronic equipment from voltage transients induced by
lightning and other transient voltage events.
SMF package is 50% smaller in footprint when compare
to SMA package and deliverying one of the lowest height
profiles (1.1mm) in the industry.
Features
•Compatible with
• For surface mounted
• Low profile: maximum
• Typical failure mode is
• Whisker test is conducted
• IEC-61000-4-2 ESD
• ESD protection of data
Applications
SMF devices are ideal for the protection of I/O interfaces,
V
portable devices, business machines, power supplies and
other consumer applications.
industrial standard
package SOD-123
CC
short from over-specified
voltage or current
based on JEDEC
JESD201A per its table 4a
and 4c
applications to optimize
board space
height of 1.1mm.
30kV (Air), 30kV (Contact)
lines in accordance with
IEC 61000-4-2 (IEC801-2)
bus and other vulnerable circuit used in cellular phones,
• EFT protection of data
• Low inductance, excellent
• 200W peak pulsepower
• Fast response time:
• High temperature
• Glass passivated junction
• Built-in strain relief
• Matte tin lead–free plated
• Halogen-free and RoHS
lines in accordance with
IEC 61000-4-4 (IEC801-4)
capability at 10 × 1000µs
waveform, repetition rate
(duty cycle): 0.01%
typically less than 1.0ns
from 0 Volts to V
soldering: 260°C/40
seconds at terminals
clamping capability
compliant
BR
min
RoHS

Related parts for SMF28A

SMF28A Summary of contents

Page 1

... Notes: 1. Non-repetitive current pulse, per Fig. 4 and derated above T Functional Diagram Bi-directional Cathode Uni-directional © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/04/13 Description The SMF series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. ...

Page 2

... AX 11.1 SMF11A AZ 12.2 SMF12A BE 13.3 SMF13A BG 14.4 SMF14A BK 15.6 SMF15A BM 16.7 SMF16A SMF17A BR 18.9 SMF18A BT 20.0 SMF20A BV 22.2 SMF22A BX 24.4 SMF24A BZ 26.7 SMF26A CE 28.9 SMF28A CG 31.1 SMF30A CK 33.3 SMF33A CM 36.7 SMF36A CP 40.0 SMF40A CR 44.4 SMF43A SMF45A CV 50.0 SMF48A CX 53.3 SMF51A CZ 56.7 SMF54A DE 60.0 Notes measured after I applied for 300µ sequare wave pulse or equivalent Surge current waveform per 10 × 1000µs exponential wave and derated per Fig.2. ...

Page 3

... Forward Voltage Drop for Uni-directional F Ratings and Characteristic Curves (T A Figure 1 - TVS Transients Clamping Waveform Voltage Transients Voltage Across TVS Current Through TVS © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/04/ =25°C unless otherwise noted) Figure 2 - Peak Pulse Power Rating Curve 10 1 ...

Page 4

... Pulse Width(td) is defined as the point where the peak current decays to 50 PPM Peak Value I PPM Half Value ( ) I PPM I PPM 2 10/1000µsec. Waveform as defined by R.E 1.0 2.0 3.0 4.0 t-Time (ms 140 Temperature (ºC) © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/04/13 ...

Page 5

... Color band denotes cathode except bipolar Terminal Matte tin-plated leads, solderable per JESD22-B102D - SOD-123 Package Dimensions Mounting Pad Layout 1.3 (0.051) 1.6 (0.062) 1.4 (0.055) © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/04/13 Lead–free assembly T 150°C P 200° – 180 secs T s(max) 3° ...

Page 6

... Trace Code Marking Y:Year Code M: Month Code Packaging Packaging Option Specification Tape & Reel – 8mm/7” tape EIA RS-481 0.059 DIA Cover tape (1.5) Dimensions are in inches (and millimeters). Direction of Feed Cathode © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/04/13 ...

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