HBAT-5400 Datasheet, PDF (8/8 Pages) Agilent(Hewlett-Packard) – High Performance Schottky Diode for Transient Suppression

The key factors in these equations
are: R_S, the series resistance of the
diode where heat is generated
under high current conditions;
θchip, the chip thermal resistance
of the Schottky die; and θpackage,
or the package thermal resistance.
R_S for the HBAT-540x family of
diodes is typically 2.4 Ω, other
than the HSMS-270x family, this is
the lowest of any Schottky diode
available. Chip thermal resistance
is typically 40°C/W; the thermal
resistance of the iron-alloy-
leadframe, SOT-23 package is
typically 460°C/W; and the thermal
resistance of the copper-
leadframe, SOT-323 package is
typically 110°C/W. The impact of
package thermal resistance on the
current handling capability of
these diodes can be seen in
Figures 3 and 4. Here the com-
puted values of junction tempera-
ture vs. forward current are
shown for three values of ambient
temperature. The SOT-323 prod-
ucts, with their copper
leadframes, can safely handle
almost twice the current of the
larger SOT-23 diodes. Note that
the term “ambient temperature”
refers to the temperature of the
diode’s leads, not the air around
the circuit board. It can be seen
that the HBAT-540B and
HBAT-540C products in the
SOT-323 package will safely
withstand a steady-state forward
current of 330 mA when the
diode’s terminals are maintained
at 75°C.
For pulsed currents and transient
current spikes of less than one
microsecond in duration, the
junction does not have time to
reach thermal steady state.
Moreover, the diode junction may
be taken to temperatures higher
than 150°C for short timeperiods
without impacting device MTTF.
Because of these factors, higher
currents can be safely handled.
The HBAT-540x family has the
second highest current handling
capability of any Agilent diode,
next to the HSMS-270x series.
Part Number Ordering Information
Part Number
No. of Devices
HBAT-5400-BLK
HBAT-5400-TR1
HBAT-5400-TR2
100
3,000
10,000
HBAT-5402-BLK
HBAT-5402-TR1
HBAT-5402-TR2
100
3,000
10,000
HBAT-540B-BLK
HBAT-540B-TR1
HBAT-540B-TR2
100
3,000
10,000
HBAT-540C-BLK
HBAT-540C-TR1
HBAT-540C-TR2
100
3,000
10,000
HBAT-540E-BLK
HBAT-540E-TR1
HBAT-540E-TR2
100
3,000
10,000
HBAT-540F-BLK
HBAT-540F-TR1
HBAT-540F-TR2
100
3,000
10,000
Container
Antistatic Bag
7" Reel
13" Reel
Antistatic Bag
7" Reel
13" Reel
Antistatic Bag
7" Reel
13" Reel
Antistatic Bag
7" Reel
13" Reel
Antistatic Bag
7" Reel
13" Reel
Antistatic Bag
7" Reel
13" Reel
Note: For lead-free option, the part number will have the character "G"
at the end, eg. HBAT-540x-TR2G for a 10,000 lead-free reel.
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Data subject to change.
Copyright © 2003 Agilent Technologies, Inc.
Obsoletes 5968-7959E
March 24, 2004
5989-0472EN