Schottky Barrier Rectifier
©2017 Littelfuse, Inc
Specifications are subject to change without notice.
Revised:03/16/17
DST860S, 8A, 60V, TO-277B, Single
DST1550S RoHS
Pb
Maximum Ratings
Parameters Symbol Test Conditions Max Unit
Peak Inverse Voltage VRWM - 50 V
Average Forward Current IF(AV)
50% duty cycle @TL = 125 °C
rectangular wave form 15 A
Peak One Cycle Non-Repetitive Surge
Current IFSM 8.3 ms, half Sine pulse 200 A
Electrical Characteristics
Parameters Symbol Test Conditions Typ Max Unit
Forward Voltage Drop*
VF1
@5A, Pulse, TJ = 25 °C 0.38 0.46
V
@7.5A, Pulse, TJ = 25 °C 0.41 0.49
@15A, Pulse, TJ = 25 °C 0.48 0.56
VF2
@5A, Pulse, TJ = 125 °C 0.26 0.35
@7.5A, Pulse, TJ = 125 °C 0.31 0.40
@15A, Pulse, TJ = 125 °C 0.41 0.50
Reverse Current* IR1 @VR = rated VR, TJ = 25 °C 0.14 3 mA
IR2 @VR = rated VR, TJ = 125 °C 60 140
* Pulse Width < 300μs, Duty Cycle <2%
Pin out
1
K
2
Anode
Anode
Cathode
Description
Applications
Littelfuse DST series Ultra Low VF Schottky Barrier
Rectifier is designed to meet the general requirements
of commercial and industry applications by providing high
temperature, low leakage and lower VF products.
It is suitable for high frequency switching mode power
supply, free-wheeling diodes and polarity protection
diodes.
• Switching mode power
supply
• DC/DC converters
• Free-Wheeling diodes
• Polarity Protection Diodes
Features
DST1550S, 15A, 50V, TO-277B, Single
e3
• Ultra low forward voltage
drop
• High frequency operation
• MSL: Level 1 - unlimited
• High junction
temperature capability
• Trench MOS Schottky
technology
• Single die in TO-277B
Package
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/ JEDEC J-STD-
609A.01)
Schottky Barrier Rectifier
©2017 Littelfuse, Inc
Specifications are subject to change without notice.
Revised:03/16/17
DST860S, 8A, 60V, TO-277B, Single
Thermal-Mechanical Specifications
DST1550S, 15A, 50V, TO-277B, Single
Parameters Symbol Test Conditions Max Unit
Junction Temperature TJ -55 to +150 °C
Storage Temperature Tstg -55 to +150 °C
Maximum Thermal Resistance
Junction to Ambient RthJA
DC operation
75 °C/W
Maximum Thermal Resistance
Junction to Lead RthJL 3.5 °C/W
Approximate Weight wt 0.08 g
Case Style TO-277B
Figure 1: Typical Forward Characteristics Figure 2: Typical Reverse Characteristics
Figure 3: Typical Junction Capacitance
Schottky Barrier Rectifier
©2017 Littelfuse, Inc
Specifications are subject to change without notice.
Revised:03/16/17
DST860S, 8A, 60V, TO-277B, Single
DST1550S, 15A, 50V, TO-277B, Single
Dimensions-TO-277B
Symbol Millimeters
Min Typ Max
A6.30 6.50 6.70
B3.88 3.98 4.08
C0.95 1. 10 1.25
D0.20 0.25 0.30
E5.28 5.38 5.48
F3.40 3.55 3.70
G2.90 3.05 3.20
H1. 74 1.84 1.94
I1. 10 1.25 1.40
J- 0.85 -
K1.70 1.80 1.90
L0.85 0.90 0.95
M- 0.56 -
Packing Options
Part Number Marking Packing Mode M.O.Q
DST1550S DST1550S 5000pcs / Reel 5000
Part Numbering and Marking System
6
LF YYWWL
DST860S
DST = Device Type
8 = Forward Current (8A)
60 = Reverse Voltage (60V)
YY = Year
WW = Week
L = Lot Number
LF = Littelfuse
S = Package Type
Carrier Tape & Reel Specification
K
C
A
E
G
F
J
I
M
H
B
L
D
K
C
A
E
G
F
J
I
M
H
B
L
D
Mounting Pad Layout
3.20[0.126]
MAX
4.90[0.193]
MAX 1.00[0.039]
MAX
1.40[0.055]
MAX
1.94[0.076]
MAX
0.95[0.037]
MAX
DST1550S
15 (15A)
50 (50V)
Symbol Millimeters
Min Max
A4.28 4.48
B6.80 7. 0 0
d1.40 1.60
d1 - 1.50
E1.65 1.85
F5.40 5.60
P7.90 8.10
P0 3.90 4.10
W11.70 12.30
