USR2-T220348OHMSC0.25%3PPM datasheet, PDF

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USR2-T220348OHMSC0.25%3PPM: DescriptionFixed Resistor, Metal Foil, 1W, 348ohm, 0.25% +/-Tol, -3,3ppm/Cel, 4016,; CategoryPassive components The resistor; File Size337KB，4 Pages; ManufacturerVishay; Websitehttp://www.vishay.com; Environmental Compliance

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USR2-T220348OHMSC0.25%3PPM Overview

Fixed Resistor, Metal Foil, 1W, 348ohm, 0.25% +/-Tol, -3,3ppm/Cel, 4016,

USR2-T220348OHMSC0.25%3PPM Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	286327530
Reach Compliance Code	compliant
Country Of Origin	Israel
ECCN code	EAR99
YTEOL	10
structure	Rectangular
Lead length	11.8 mm
lead spacing	5.08 mm
Number of terminals	2
Maximum operating temperature	155 °C
Minimum operating temperature	-55 °C
Package height	17.3 mm
Package length	10.16 mm
Package shape	RECTANGULAR PACKAGE
Package form	Radial
Package width	4 mm
Rated power dissipation(P)	1 W
resistance	348 Ω
Resistor type	FIXED RESISTOR
series	USR2-T220
size code	4016
technology	METAL FOIL
Temperature Coefficient	3 ppm/°C
Tolerance	0.25%

USR2-T220348OHMSC0.25%3PPM Preview

USR UNR 2-T220 T221

Powertron

FEATURES

•

Resistances from 0.5Ohm to 150kOhms

Power Rating to 10Watt

Resistance Tolerances to ±0.01%

TCR to ±3ppm/K

Load Stability to 0.01%

TO-220 Housing

TABLE 1—SPECIFICATIONS

TYPE

Resistance Range

Free air 70°C

R < 50R0

R > 50R0

With heatsink

R < 50R0

R > 50R0

USR 2-T220

USR 2-T221

0.5 Ohms to 150 kOhms

1.5W

1.0W

10W

UNR 2-T220

UNR 2-T221

0.5 Ohms to 5 kOhms

1.5W

1.0W

15W

10W

Power Rating

Tolerances

from 0.5 Ohms

from 10.0 Ohms

from 25.0 Ohms

from 50.0 Ohms

Thermal Resistance Rthj-c

R<50R0

R>50R0

Stability (1000h)

Shelf Lifw Stability

Temperature Coefficient

Voltage Proof

Thermal EMF

Operating Temperature Range

Resistor Material

Substrate

Housing

Connector Material

Terminals

Max. Torque

Notes

0.1% / 0.25% / 0.5% / 1%

0.05% / 0.1% / 0.25% / 0.5% / 1%

0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%

0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%

10.8 K/W

18.8 K/W

0.01%

25ppm / ∆R after 1 year

50ppm / ∆R after 3 year

max. ±5ppm/K (-55 to 155°C)

typ. ±3ppm/K (-55 to 125°C)

1 kVDC

< 0.1µV/K

-55 to 155°C

NiCr-Foil

Cu / tinned

1.0 Nm

Specially designed for ap-

plications with fast changing

electrical load

AlN

Epoxy + Cu heatsink nickel plated

6.8 K/W

10.8 K/W

ORDERING INFORMATION

Part Number - Resistance - Contact - Tolerance - TCR

UNR 2-T220B 4.7kOhms C 0.5% 3ppm

Document No.: 64222

Revision: 24-04-2013

For technical questions,

contact

powertron@vishaypg.com

www.powertron.de

USR UNR 2-T220 T221

Powertron

FIGURE 1—TEMPERATURE COEFFICIENT

200

100

∆R/R

(ppm)

-100

-200

-300

-400

-500

-600

-700

-75

-50

-25

Temperature (°C)

100

125

Nominal Spread

±2.3ppm/K

150

Nominal

∆R/R

Nominal Spread

±2.3ppm/K

FIGURE 2—DERATING

Power Rating Notes -

Power (% from

nominal power)

120

100

115

130

145

155

The U-Series Resistors must be attached to a suitable heat-

sink. The maximum internal resistor temperature is 155°C.

To specify an appropriate heatsink use the following formula :

= T

MAX

- ( P x R

) - T

Where:

= Thermal Resistance of Heatsink ( K/W )

= Thermal Resistance of Resistor ( K/W )

MAX

= Maximum Temperature of Resistor

= Ambient Temperature of Heatsink ( °C )

P = Power Through Resistor ( W )

Temperature of the backplate(°C)

www.powertron.de

For technical questions,

contact

powertron@vishaypg.com

Document No.: 64222

Revision: 24-04-2013

USR UNR 2-T220 T221

Powertron

FIGURE 3—DIMENSIONS

in mm (inches)

USR 2-T220 / UNR 2-T220

Dimension

±0.2 (±0.008)

±0.1 (±0.004)

±0.2 (±0.008)

±0.1 (±0.004)

±0.2 (±0.008)

±0.1 (±0.004)

Standard

contact

C-contact

17.30 (0.68)

10.16 (0.40)

6.00 (0.24)

Ø3.7 (Ø0.146)

16.40 (0.65)

5.08 (0.20)

0.76 (0.03)

1.30 (0.05)

10.00 (0.39) 13.80 (0.54)

2.00 (0.08)

1.20 (0.05)

4.00 (0.16)

2.90 (0.11)

0.40 (0.02)

1.85 (0.07)

USR 2-T221 / UNR 2-T221

Dimension

±0.2 (±0.008)

±0.1 (±0.004)

±0.2 (±0.008)

±0.1 (±0.004)

±0.2 (±0.008)

±0.1 (±0.004)

Standard

contact

C-contact

18.30 (0.72)

10.16 (0.40)

3.70 (0.15)

Ø3.2 (Ø0.126)

16.40 (0.65)

5.08 (0.20)

0.76 (0.03)

1.30 (0.05)

10.00 (0.39) 13.80 (0.54)

2.00 (0.08)

1.20 (0.05)

4.00 (0.16)

3.90 (0.15)

0.40 (0.02)

1.85 (0.07)

Document No.: 64222

Revision: 24-04-2013

For technical questions,

contact

powertron@vishaypg.com

www.powertron.de

Legal Disclaimer Notice

Vishay Precision Group

Disclaimer

ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their

behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or

incompleteness contained herein or in any other disclosure relating to any product.

The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and

conditions of purchase, including but not limited to, the warranty expressed therein.

Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms

and conditions of purchase.

To the maximum extent permitted by applicable law, Vishay Precision

Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and

all liability, including without limitation special, consequential or incidental damages, and (iii) any and

all implied warranties, including warranties of fitness for particular purpose, non-infringement and

merchantability.

Information provided in datasheets and/or specifications may vary from actual results in different

applications and performance may vary over time. Statements regarding the suitability of products for

certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that

are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a

particular product with the properties described in the product specification is suitable for use in a particular

application.

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

by any conduct of Vishay Precision Group.

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

otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly

indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay

Precision Group for any damages arising or resulting from such use or sale. Please contact authorized

Vishay Precision Group 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 No.: 63999

Revision: 27-Apr-2011

www.vishaypg.com

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