The key factors in these equations

diode where heat is generated

under high current conditions;

of the Schottky die; and

or the package thermal resistance.

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

Part Number Ordering Information

Part Number

No. of Devices

Container

HBAT-5400-BLK

100

Antistatic Bag

HBAT-5400-TR1

3,000

7" Reel

HBAT-5400-TR2

10,000

13" Reel

HBAT-5402-BLK

100

Antistatic Bag

HBAT-5402-TR1

3,000

7" Reel

HBAT-5402-TR2

10,000

13" Reel

HBAT-540B-BLK

100

Antistatic Bag

HBAT-540B-TR1

3,000

7" Reel

HBAT-540B-TR2

10,000

13" Reel

HBAT-540C-BLK

100

Antistatic Bag

HBAT-540C-TR1

3,000

7" Reel

HBAT-540C-TR2

10,000

13" Reel

HBAT-540E-BLK

100

Antistatic Bag

HBAT-540E-TR1

3,000

7" Reel

HBAT-540E-TR2

10,000

13" Reel

HBAT-540F-BLK

100

Antistatic Bag

HBAT-540F-TR1

3,000

7" Reel

HBAT-540F-TR2

10,000

13" Reel

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.

www.agilent.com/semiconductors

For product information and a complete list of

distributors, please go to our web site.

For technical assistance call:

Americas/Canada: +1 (800) 235-0312 or

(916) 788-6763

Europe: +49 (0) 6441 92460

China: 10800 650 0017

Hong Kong: (65) 6756 2394

India, Australia, New Zealand: (65) 6755 1939

Japan: (+81 3) 3335-8152(Domestic/International), or

0120-61-1280(Domestic Only)

Korea: (65) 6755 1989

Singapore, Malaysia, Vietnam, Thailand, Philippines,

Indonesia: (65) 6755 2044

Taiwan: (65) 6755 1843

Data subject to change.

Copyright © 2003 Agilent Technologies, Inc.

Obsoletes 5968-7959E

March 24, 2004

5989-0472EN

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.