LPS0300HR240JN [VISHAY]

Power Resistor for Mounting onto a Heatsink Thick Film Technology; 功率电阻安装在散热片厚膜工艺


型号：	LPS0300HR240JN
厂家：	VISHAY
描述：	Power Resistor for Mounting onto a Heatsink Thick Film Technology 功率电阻安装在散热片厚膜工艺散热片
文件：	总4页 (文件大小：327K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LPS 300

Vishay Sfernice

Power Resistor for Mounting onto a Heatsink

Thick Film Technology

FEATURES

• 300 W at 85 °C bottom case temperature

• Wide resistance range: 0.3 Ω to 900 kΩ

E24 series

• Non inductive

• Easy mounting

• Low thermal radiation of the case

• Compliant to RoHS directive 2002/95/EC

DIMENSIONS in millimeters

25.8

LPS 300

6K8 5 %

25.2

21.2

15.2

64.7

2 x M4 useful depth: 8

2 x Ø 4.2

Ø 20

13.6

Note

• Tolerances unless stated: 0.2 mm

MECHANICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

Mechanical Protection

Resistive Element

Substrate

Insulated case UL 94 V-0

Resistance Range

0.3 Ω to 900 kΩ

Thick film

Alumina

Tolerances (Standard)

1 % to 10 %

300 W at + 85 °C

bottom case temperature

End Connections

Tightening Torque

- On Connections

- On Heatsink

Screws M4

Power Rating and

Thermal Resistance

_{TH (j - c)}: 0.112 °C/W

2 Nm

Temperature Coefficient

- 55 °C/120 °C

R ≤ 1 U: 500 ppm/°C

1 U < R ≤ 10 U: 300 ppm/°C

10 U < R: 150 ppm/°C

2 Nm

Maximum Torque

Weight

2.5 Nm

83 g 10 %

Standard

IEC 60115-1

Limiting Element Voltage U_L

5 kV

ENVIRONMENTAL SPECIFICATIONS

Dielectric Strength

IEC 60115-1, 1 min,

10 mA max.

7 kV_RMSor 12 kV_RMS

Temperature Range

Climatic Category

- 55 °C to 120 °C

55/120/56

Insulation Resistance

Inductance

≥ 10⁴MΩ

≤ 0.1 µH

83.33 kΩ

Critical Resistance

Document Number: 50052

Revision: 09-Jun-10

For technical questions, contact: sfer@vishay.com

www.vishay.com

LPS 300

Power Resistor for Mounting onto a Heatsink

Thick Film Technology

Vishay Sfernice

PERFORMANCE

TESTS

CONDITIONS

REQUIREMENTS

IEC 60115-1

4 x P_r/10 s

U_max.≤ U_L= 5000 V

Momentary Overload

(0.25 % + 0.05 Ω)

IEC 60115-1/IEC 60068-2-14 Test Na

5 cycles

Rapid Temperature Change

(0.5 % + 0.05 Ω)

- 55 °C to + 120 °C

IEC 60115-1

1000 h (90/30) P_rat 85 °C

Load Life

(0.5 % + 0.05 Ω)

(0.25 % + 0.05 Ω)

(1 % + 0.05 Ω)

IEC 60115-1

56 days RH 95 %/40 °C

Humidity (Steady State)

Vibration

MIL STD 202 Method 204 Cond. D

(10 g; 5/500 Hz)

IEC 60115-1

(55/120/56)

Climatic Sequence

RECOMMENDATIONS FOR MOUNTING ONTO A HEATSINK

• Surfaces in contact must be carefully cleaned.

• The heatsink must have an acceptable flatness: From 0.05 mm to 0.1 mm/100 mm.

• Roughness of the heatsink must be around 6.3 µm. In order to improve thermal conductivity, surfaces in contact (alumina,

heatsink) should be coated with a silicone grease (type SI 340 from Rhône-Poulenc or Dow 340 from Dow Corning) or a thermal

film (type Q Pad II) easier and faster to install than the grease.

• The fastening of the resistor to the heatsink is under pressure control of two screws tightened at 2 Nm for full power availability.

LPS 300

Tightening Torque on Heatsink

2 Nm

• The following accessories are supplied with each product: 2 screws CHC M4 x 25 class 8.8 and 2 M4 contact lock washers for

heatsink mounting,

2 screws TH M4 x 6/6 and 2 M4 contact lock washers for

connections. 2 off CHC M4 x 16/16 class 8.

CHOICE OF THE HEATSINK

The user must choose the heatsink according to the working conditions of the component (power, room temperature).

Maximum working temperature must not exceed 120 °C. The dissipated power is simply calculated by the following ratio:

ΔT

P =

---------------------------------------------------------

[R_{TH (j - c)}+ R_{TH (c - a)}

]

Expressed in W

ΔT:

R_{TH (j - c)}

Difference between maximum working temperature and room temperature

Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal

resistance of the component: (see specifications environmental paragraph).

R_{TH (c - a)}

Thermal resistance value measured between outer side of the resistor and room temperature. It is the thermal

resistance of the thermal interface, the heatsink (type, shape) and the quality of the fastening device.

Example:

_{TH (c - a)}for LPS 300 power dissipation 180 W at + 50 °C room temperature.

ΔT ≤ 120 °C - 50 °C = 70 °C

ΔT

180

-------

---------

= 0.388 °C/W

_{TH (j - c)}+ R_{TH (c - a)}

_{TH (j - c)}= 0.112 °C/W

_{TH (c - a)}= 0.388 °C/W - 0.112 °C/W = 0.276 °C/W

www.vishay.com

For technical questions, contact: sfer@vishay.com

Document Number: 50052

Revision: 09-Jun-10

LPS 300

Power Resistor for Mounting onto a Heatsink

Thick Film Technology

Vishay Sfernice

OVERLOADS

POWER RATING

In any case the applied voltage must be lower than U_L= 5000 V.

Short time overload: 4 x P_n/10 s

The temperature of the case should be maintained within the

limits specified in the following figure.

To optimize the thermal conduction, contacting surfaces

should be coated with silicone grease or thermal film, and

heatsink mounting screws tightened to 2 Nm.

Accidental overload: The values indicated on the following

graph are applicable to resistors in air or mounted onto a

heatsink.

ENERGY CURVE

10 000

100

1000

100

0.1

100

150

200

10^-6

10^-5

10^-4

10^-3

10^-2

10^-1

120

BOTTOM CASE TEMPERATURE IN °C

OVERLOAD DURATION IN s

MARKING

PACKAGING

Box of 15 units

Series, style, ohmic value (in Ω), tolerance (in %),

manufacturing date, Vishay Sfernice trademark.

ORDERING INFORMATION

LPS

300

100 kΩ

1 %

xxx

BO15

MODEL

STYLE

RESISTANCE

VALUE

TOLERANCE

CUSTOM

DESIGN

PACKAGING

LEAD (Pb)-FREE

1 %

2 %

5 %

Optional

on request:

Special TCR,

shape etc.

10 %

GLOBAL PART NUMBER INFORMATION

GLOBAL

MODEL

SPECIAL

DIELECTRIC

OHMIC VALUE

TOLERANCE

PACKAGING

LPS 300

L = Dielectric

strength 7 kV

H = Dielectric

strength 12 kV

The first three digits are

significant figures and the

last digit specifies the

number of zeros to follow. R

designates decimal point.

F = 1 %

G = 2 %

J = 5 %

K = 10 %

B = Box 15 pieces

N = Box 15 pieces N/A

(1 to 14 pieces by box)

As applicable

ZAx

48R7 = 48.7 Ω

47R0 = 47 Ω

1001 = 1 kΩ

4R70 = 4.7 Ω

R240 = 0.24 Ω

Document Number: 50052

Revision: 09-Jun-10

For technical questions, contact: sfer@vishay.com

www.vishay.com

Legal Disclaimer Notice

Vishay

Disclaimer

All product specifications and data are subject to change without notice.

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf

(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein

or in any other disclosure relating to any product.

Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any

information provided herein to the maximum extent permitted by law. The product specifications do not expand or

otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed

therein, which apply to these products.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this

document or by any conduct of Vishay.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless

otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such

applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting

from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding

products designed for such applications.

Product names and markings noted herein may be trademarks of their respective owners.

Document Number: 91000

Revision: 18-Jul-08

www.vishay.com

相关型号：