Vishay 18TQ0..PbF Series Data Sheet

18TQ0..PbF Series

Vishay High Power Products

Schottky Rectifier, 18 A

	Base
	cathode
		2
	1	3
TO-220AC	Cathode	Anode

PRODUCT SUMMARY

IF(AV)	18 A
VR	35 V to 50 V

FEATURES

• 175 °C TJ operation

• Low forward voltage drop

• High frequency operation

•High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance

•Guard ring for enhanced ruggedness and long term reliability

•Compliant to RoHS directive 2002/95/EC

•Designed and qualified for industrial level

DESCRIPTION

The 18TQ...PbF Schottky rectifier series has been optimized for low reverse leakage at high temperature. The proprietary barrier technology allows for reliable operation up to 175 °C junction temperature. Typical applications are in switching power supplies, converters, freewheeling diodes, and reverse battery protection.

MAJOR RATINGS AND CHARACTERISTICS

SYMBOL

CHARACTERISTICS

VALUES

UNITS

IF(AV)

Rectangular waveform

18

A

VRRM

Range

35 to 50

V

IFSM

tp = 5 μs sine

1800

A

VF

18 Apk, TJ = 125 °C

0.53

V

TJ

Range

- 55 to 175

°C

VOLTAGE RATINGS

PARAMETER

SYMBOL

18TQ035PbF

18TQ040PbF

18TQ045PbF

18TQ050PbF

UNITS

Maximum DC reverse voltage

VR

35

40

45

50

V

Maximum working peak reverse voltage

VRWM

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

TEST CONDITIONS

VALUES

UNITS

Maximum average forward current

IF(AV)

50 % duty cycle at TC = 149 °C, rectangular waveform

18

See fig. 5

A

Maximum peak one cycle

5 μs sine or 3 μs rect. pulse

Following any rated load

1800

non-repetitive surge current

IFSM

condition and with rated

10 ms sine or 6 ms rect. pulse

390

See fig. 7

VRRM applied

Non-repetitive avalanche energy

EAS

TJ = 25 °C, IAS = 3.6 A, L = 3.7 mH

24

mJ

Repetitive avalanche current

IAR

Current decaying linearly to zero in 1 μs

3.6

A

Frequency limited by TJ maximum VA = 1.5 x VR typical

* Pb containing terminations are not RoHS compliant, exemptions may apply

Document Number: 94149

For technical questions, contact: [e-mail]

www.vishay.com

Revision: 10-Nov-09

1

18TQ0..PbF Series

Vishay High Power Products				Schottky Rectifier, 18 A
ELECTRICAL SPECIFICATIONS
PARAMETER			SYMBOL	TEST CONDITIONS		VALUES	UNITS
				18 A	TJ = 25 °C	0.60
Maximum forward voltage drop			VFM (1)	36 A		0.72	V
See fig. 1
				18 A	TJ = 125 °C	0.53
				36 A		0.67
Maximum reverse leakage current			IRM (1)	TJ = 25 °C	VR = Rated VR	2.5	mA
See fig. 2				TJ = 125 °C		25
Maximum junction capacitance			CT	VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C		1400	pF
Typical series inductance			LS	Measured lead to lead 5 mm from package body		8	nH
Maximum voltage rate of change			dV/dt	Rated VR		10 000	V/μs
Note
(1) Pulse width < 300 μs, duty cycle < 2 %
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER			SYMBOL	TEST CONDITIONS		VALUES	UNITS
Maximum junction and storage			TJ, TStg			- 55 to 175	°C
temperature range
Maximum thermal resistance,			RthJC	DC operation		1.50
junction to case				See fig. 4
							°C/W
Typical thermal resistance,			RthCS	Mounting surface, smooth and greased		0.50
case to heatsink
Approximate weight						2	g
						0.07	oz.
Mounting torque	minimum					6 (5)	kgf · cm
	maximum					12 (10)	(lbf in)
						18TQ035
Marking device				Case style TO-220AC		18TQ040
						18TQ045
						18TQ050

www.vishay.com	For technical questions, contact: [e-mail]	Document Number: 94149
2		Revision: 10-Nov-09

18TQ0..PbF Series

Schottky Rectifier, 18 A Vishay High Power Products

	1000
<![if ! IE]> <![endif]>InstantaneousForward	100
	10					TJ = 175 °C
						TJ = 125 °C
						TJ = 25 °C
	1
	<![if ! IE]> <![endif]>(A)Current
<![if ! IE]> <![endif]>-
<![if ! IE]> <![endif]>F
<![if ! IE]> <![endif]>I
	0.1
	0	0.2	0.4	0.6	0.8	1.0	1.2	1.4	1.6

VFM - Forward Voltage Drop (V)

Fig. 1 - Maximum Forward Voltage Drop Characteristics

<![if ! IE]>

<![endif]>IR - Reverse Current (mA)

1000
100		TJ = 175 °C
10		TJ = 150 °C
		TJ = 125 °C
1		TJ = 100 °C
0.1	TJ	= 75 °C

0.01 TJ = 50 °C

0.001

TJ = 25 °C

0.0001

0

10

20

30

40

50

VR - Reverse Voltage (V)

Fig. 2 - Typical Values of Reverse Current vs. Reverse Voltage

	10 000
<![if ! IE]> <![endif]>(pF)
<![if ! IE]> <![endif]>- Junction Capacitance	1000
<![if ! IE]> <![endif]>T
<![if ! IE]> <![endif]>C
	100
	0	10	20	30	40	50

VR - Reverse Voltage (V)

Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage

<![if ! IE]> <![endif]>(°C/W)	10
<![if ! IE]> <![endif]>Impedance	1
	0.1			D = 0.50			PDM
<![if ! IE]> <![endif]>- Thermal
				D = 0.33			t1
				D = 0.25			t2
	0.01			D = 0.17		Notes:
		Single pulse		D = 0.08
<![if ! IE]> <![endif]>thJC						1. Duty factor D = t1/t2 .
		(thermal resistance)
						2. Peak TJ	= PDM x ZthJC	+ TC	.
<![if ! IE]> <![endif]>Z	0.001
	0.00001	0.0001	0.001	0.01	0.1	1	10		100

t1 - Rectangular Pulse Duration (s)

Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics

Document Number: 94149	For technical questions, contact: [e-mail]	www.vishay.com
Revision: 10-Nov-09		3