Littelfuse SMF User Manual
Transient Voltage Suppression Diodes
Bi-directional
Datasheet
Surface Mount – 200W > SMF Series
SMF Series
Uni-directional
Agency Approvals
AGENCY AGENCY FILE NUMBER
E230531
Maximum Ratings and Thermal Characteristics
(T
=25°C unless otherwise noted)
A
Parameter Symbol Value Unit
Peak Pulse Power Dissipation at
=25ºC by 10/1000µs (Note 1)
T
A
Thermal Resistance Junction- toAmbient
Thermal Resistance Junction- toLead
Operating and Storage Temperature
Range
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above T
P
R
R
T
J,TSTG
PPM
THJ-A
THJ-L
200 W
220 °C/W
100 °C/W
-55 to 150 °C
=25ºC per Fig. 3.
A
RoHS
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 low height profile (1.1mm) in
the industry.
Features
• Compatible with
industrial standard
package SOD-123F
• For surface mounted
applications to optimize
board space
• Low prole: maximum
height of 1.1mm.
• Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
30kV(Air), 30kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2 (IEC801-2)
• Low inductance, excellent
clamping capability
• 200W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Fast response time:
typically less than 1.0ns
from 0 Volts to V
BR
min
• High temperature
soldering: 260°C/40
seconds at terminals
• Glass passivated junction
• Built-in strain relief
• Meet MSL level1, per
J-STD-020, LF maximum
peak of 260°C
• Matte tin lead–free plated
• Halogen-free and RoHS
compliant
• EFT protection of data
lines in accordance with
IEC 61000-4-4 (IEC801-4)
Functional Diagram
Cathode
Uni-directional
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Anode
Applications
SMF devices are ideal for the protection of I/O interfaces,
V
bus and other vulnerable circuit used in cellular phones,
CC
portable devices, business machines, power supplies and
other consumer applications.
Additional Information
Resources
Samples
Transient Voltage Suppression Diodes
Surface Mount – 200W > SMF Series
Electrical Characteristics (T
=25°C unless otherwise noted)
A
Breakdown
Part
Number
Marking
Code
Voltage V
(Volts) @ I
BR
T
MIN MAX
Test
Current
I
T
(mA)
Reverse
Stand off
Voltage V
R
(V)
Maximum
Reverse
Leakage @ V
IR (µA)
Maximum
Peak Pulse
Current Ipp
R
(A)
Maximum
Clamping
Voltage @
I
pp
VC (V)
SMF5.0A AE 6.40 7. 0 0 10 5.0 400 21.7 9.2 X
SMF6.0A AG 6.67 7.37 10 6.0 400 19.4 10.3 X
SMF6.5A AK 7.22 7.98 10 6.5 250 1 7. 9 11. 2 X
SMF7.0A AM 7.78 8.60 10 7.0 100 16.7 12.0 X
SMF7.5A AP 8.33 9.21 1 7.5 50 15.5 12.9 X
SMF8.0A AR 8.89 9.83 1 8.0 25 14.7 13.6 X
SMF8.5A AT 9.44 10.40 1 8.5 10 13.9 14.4 X
SMF9.0A AV 10.00 11. 1 0 1 9.0 5 13.0 15.4 X
SMF10A AX 11. 10 12.30 1 10 2.5 11. 8 1 7. 0 X
SMF11A AZ 12.20 13.50 1 11 2.5 11. 0 18.2 X
SMF12A BE 13.30 14.70 1 12 2.5 10.1 19.9 X
SMF13A BG 14.40 15.90 1 13 1. 0 9.3 21.5 X
SMF14A BK 15.60 17.20 1 14 1. 0 8.6 23.2 X
SMF15A BM 16.70 18.50 1 15 1. 0 8.2 24.4 X
SMF16A BP 17.80 19.70 1 16 1. 0 7. 7 26.0 X
SMF17A BR 18.90 20.90 1 17 1. 0 7. 2 27.6 X
SMF18A BT 20.0 0 22.10 1 18 1. 0 6.8 29.2 X
SMF20A BV 22.20 24.50 1 20 1.0 6.2 32.4 X
SMF22A BX 24.40 26.90 1 22 1.0 5.6 35.5 X
SMF24A BZ 26.70 29.50 1 24 1.0 5.1 38.9 X
SMF26A CE 28.90 31.90 1 26 1.0 4.8 42.1 X
SMF28A CG 31.10 34.40 1 28 1.0 4.4 45.4 X
SMF30A CK 33.30 36.80 1 30 1.0 4.1 48.4 X
SMF33A CM 36.70 40.60 1 33 1. 0 3.8 53.3 X
SMF36A CP 40.0 0 44.20 1 36 1.0 3.4 58.1 X
SMF40A CR 44.40 49.10 1 40 1. 0 3.1 64.5 X
SMF43A CT 47.80 52.80 1 43 1.0 2.9 69.4 X
SMF45A CV 50.00 55.30 1 45 1.0 2.8 72.7 X
SMF48A CX 53.30 58.90 1 48 1.0 2.6 77.4 X
SMF51A CZ 56.70 62.70 1 51 1.0 2.4 82.4 X
SMF54A DE 60.00 66.30 1 54 1. 0 2.3 87.1 X
SMF58A RG 64.40 71.20 1 58 1. 0 2.1 93.6 X
SMF60A RK 66.70 73.70 1 60 1.0 1. 8 96.8 X
SMF64A RM 71.10 78.60 1 64 1.0 1. 7 103.0 X
SMF70A RP 77.80 86.00 1 70 1.0 1. 5 113.0 X
SMF75A RR 83.30 92.10 1 75 1.0 1.4 121.0 X
SMF78A RT 86.70 95.80 1 78 1.0 1. 4 126.0 X
SMF85A RV 94.40 104.00 1 85 1. 0 1. 3 137.0 X
Notes:
1. V
measured after IT applied for 300µs, IT = sequare wave pulse or equivalent.
BR
2. Surge current waveform per 10/100 0µs exponential wave and derated per Fig.2.
3. All terms and symbols are consistent with ANSI/IEEE C62.35.
Agency
Approval
Specifications are subject to change without notice.
© 2014 Littelfuse, Inc.
Revised: 01/20/14
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