, -O
ne.
20 STERN AVE.
SPRINGFIELD, NEW JERSEY 07081
U.S.A.
TELEPHONE: (973) 376-2922
(212)227-6005
FAX: (973) 376-8960
BY448 / BY458
Standard Avalanche Sinterglass Diode
Features
• Glass passivated junction
• Hermetically sealed package
Applications
High voltage rectification diode
Efficiency diode in horizontal deflection circuits
Mechanical Data
Case:
SOD-57 Sintered glass case
Terminals:
Plated axial leads, solderable per
MIL-STD-750, Method 2026
Polarity:
Color band denotes cathode end
Mounting Position: Any
Weight:
approx. 369 mg
Parts Table
Part
BY448
BY458
Type differentiation
V
R
= 1500 V; I
FAV
= 2 A
V
R
= 1200 V; I
FAV
= 2 A
SOD-57
SOD-57
Package
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Reverse voltage
Test condition
see electrical characteristics
Part
BY448
BY458
Peak forward surge current
Average forward current
Junction temperature
Storage temperature range
Non repetitive reverse
avalanche energy
!(BR)R = °-4 A
tp = 10 ms, half sinewave
Symbol
V
R
= V
RRM
V
R
= V
RRM
Value
Unit
V
V
A
A
°C
°C
mj
1500
1200
'FSM
'FAV
30
2
140
TI
T
stg
- 5 5 t O + 175
10
ER
Maximum Thermal Resistance
T
amb
= 25 °C, unless otherwise specified
Parameter
Junction ambient
Test condition
I = 10 mm, T|_ = constant
on PC board with spacing
25 mm
Symbol
R
thJA
Value
45
Unit
K/W
K/W
RthJA
100
Quality Semi-Conductors
BY448 / BY458
Electrical Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Forward voltage
Reverse current
Total reverse recovery time
Reverse recovery time
Test condition
Symbol
Min
Typ.
I
F
= 3 A
V
R
= V
RRM
V
R
= V
RRM
,T
j
= 140°C
I
F
= 1 A, - dj
F
/d
t
= 0.05 A/us
I
F
= 0.5 A, I
R
= 1 A, i
R
= 0,25A
V
F
IR
IH
t,r
trr
Max
1.6
3
140
20
2
Unit
V
uA
HA
us
us
Package Dimensions in mm (Inches)
Sintered Glass Case
SOD-57
Cathode Identification
0.82 (0.032) max.
^\"
\
,
^f**^
26(1. 014) min.
4.0(0.1
56) max.
-*
26(1. 014) min.
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