1

Rectifier Device Data

SWITCHMODE™

Schottky Power Rectifier

The SWITCHMODE Power Rectifier employs the Schottky Barrier principle in

a large area metal–to–silicon power diode. State–of–the–art geometry features

epitaxial construction with oxide passivation and metal overlay contact. Ideally

suited for use as rectifiers in very low–voltage, high–frequency switching power

supplies, free wheeling diodes and polarity protection diodes.

• Highly Stable Oxide Passivated Junction

• Very Low Forward Voltage Drop

• High Junction Temperature Capability

• High dv/dt Capability

• Excellent Ability to Withstand Reverse Avalanche Energy

Transients

• Guardring for Stress Protection

• Epoxy Meets UL94, VO at 1/8″

• Electrically Isolated. No Isolation Hardware Required.

• UL Recognized File #E69369(1)

Mechanical Characteristics

• Case: Epoxy, Molded

• Weight: 1.9 grams (approximately)

• Finish: All External Surfaces Corrosion Resistant and Terminal

Leads are Readily Solderable

• Lead Temperature for Soldering Purposes: 260°C Max. for 10

Seconds

• Shipped 50 units per plastic tube

• Marking: B745

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Peak Repetitive Reverse Voltage

Working Peak Reverse Voltage

DC Blocking Voltage

VRRM

VRWM

VR

45

Volts

Average Rectified Forward Current (Rated VR), TC = 105°C

IF(AV)

7.5

Amps

Peak Repetitive Forward Current (Rated VR, Square Wave, 20 kHz), TC = 105°C

IFRM

15

Amps

Non–repetitive Peak Surge Current

(Surge applied at rated load conditions halfwave, single phase, 60 Hz)

IFSM

150

Amps

Peak Repetitive Reverse Surge Current (2.0

µs, 1.0 kHz)

IRRM

1.0

Amp

Operating Junction and Storage Temperature

TJ, Tstg

– 65 to +150

°C

Voltage Rate of Change (Rated VR)

dv/dt

10000

V/

µs

RMS Isolation Voltage (t = 1 second, R.H.

≤ 30%, TA = 25°C)(2)

Per Figure 3

Per Figure 4(1)

Per Figure 5

Viso1

Viso2

Viso3

4500

3500

1500

Volts

THERMAL CHARACTERISTICS

Maximum Thermal Resistance, Junction to Case

R

θJC

4.2

°C/W

Lead Temperature for Soldering

Purposes: 1/8

″ from Case for 5 Seconds

TL

260

°C

(1) UL Recognized mounting method is per Figure 4.

(2) Proper strike and creepage distance must be provided.

SWITCHMODE is a trademark of Motorola, Inc.

Preferred devices are Motorola recommended choices for future use and best overall value.

Order this document

by MBRF745/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

12

MBRF745

SCHOTTKY BARRIER

RECTIFIER

7.5 AMPERES

45 VOLTS

CASE 221E–01

ISOLATED TO–220

Motorola Preferred Device

1

2

Rev 1