PSF45271K760DXTA - Vishay Presicion Group

www.vishay.com For technical questions, contact: ff2aresistors@vishay.com Document Number: 30162

320 Revision: 14-Apr-10

PSF

Vishay Dale

Metal Film Resistors, High Precision,

High Stability, Surface Mount

FEATURES

•Extremely low temperature coefficient of

resistance

•Molded encapsulation

•Wraparound compliant terminations eliminate

the risk of solder fillet cracking

•Solderable terminations

•Excellent stability at different environmental

conditions

•For axial-leaded product, see Vishay Dale’s PTF

datasheet

•Compliant to RoHS directive 2002/95/EC

Notes

• Marking: Print-marked-model, value, tolerance, TC, date code.

• DSCC has created a drawing to support the need for a precision 2012-sized product. Vishay Dale is listed as a resource on this drawing as

follows:

This drawing can be reviewed at: www.dscc.dla.mil/Programs/MilSpec/listDwgs.asp?DocType=DSCCdwg.

(1) Continuous working voltage shall be or maximum working voltage, whichever is less.

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

STANDARD ELECTRICAL SPECIFICATIONS

GLOBAL

MODEL

SIZE

INCH

POWER RATING

P85 °C

MAXIMUM

WORKING

VOLTAGE (1)

VDC

TEMPERATURE

COEFFICIENT

± ppm/°C

TOLERANCE

± %

RESISTANCE

RANGE

ENCAPSULATION

PSF2012 2012 0.125 200 5, 10, 15, 25 0.01, 0.02, 0.05,

0.1, 0.25, 0.5, 1 15 to 100K Epoxy

PSF4527 4527 0.25 300 5, 10, 15, 25 0.01, 0.02, 0.05,

0.1, 0.25, 0.5, 1 15 to 500K Thermoplastic

DSCC DRAWING

NUMBER

VISHAY DALE

MODEL

POWER RATING

P85 °C

RESISTANCE

RANGE

TOLERANCE

± %

TEMPERATURE

COEFFICIENT

± ppm/°C

MAX. WORKING

VOLTAGE (1)

VDC

02001 PSF2012..1 0.125 15 to 100 K 0.01, 0.02, 0.05,

0.1, 0.25, 0.5, 1 5, 10 200

TECHNICAL SPECIFICATIONS

PARAMETER UNIT PSF2012 PSF4527

Rated dissipation at 85 °C W 0.125 0.25

Limiting element voltage V≅200 300

Insulation voltage (1 min) Veff > 500

Thermal resistance K/W < 1300 < 520

Insulation resistance Ω≥ 1011

Category temperature range °C - 55 to + 150

Failure rate 10-9/h < 1

Weight/1000 pieces (typical) g 90 760

GLOBAL PART NUMBER INFORMATION

New Global Part Numbering: PSF201220K50BYTA (preferred part number format)

PSF2012 20K50 B Y TA

GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE TEMP. COEFFICIENT PACKAGING SPECIAL

PSF2012

PSF4527

R = Ω

K = kΩ

15R00 = 15 Ω

1K000 = 1 kΩ

500K0 = 500 kΩ

T = ± 0.01 %

Q = ± 0.02 %

A = ± 0.05 %

B = ± 0.1 %

C = ± 0.25 %

D = ± 0.5 %

F = ± 1 %

Z = ± 5 ppm/°C

Y = ± 10 ppm/°C

X = ± 15 ppm/°C

E = ± 25 ppm/°C

0 = Special

EK = Lead (Pb)-free, bulk

EA = Lead (Pb)-free, T/R

Blank = Standard

(Dash number)

(Up to 2 digits)

From 1 to 99 as

applicable

BA = Tin/lead, bulk

TA = Tin/lead, T/R (full)

P x R

Document Number: 30162 For technical questions, contact: ff2aresistors@vishay.com www.vishay.com

Revision: 14-Apr-10 321

PSF

Metal Film Resistors, High Precision,

High Stability, Surface Mount Vishay Dale

THERMAL RESISTANCE DERATING

Note

• Embossed carrier tape per EIA-481.

DIMENSIONS in inches (millimeters)

MODEL L H T W W1

PSF2012 0.200 ± 0.020

(5.08 ± 0.508)

0.096 ± 0.015

(2.44 ± 0.381)

0.040 ± 0.010

(1.02 ± 0.254)

0.125 ± 0.005

(3.18 ± 0.127)

0.050 ± 0.005

(1.27 ± 0.127)

PSF4527 0.455 ± 0.020

(11.56 ± 0.508)

0.167 ± 0.010

(4.24 ± 0.254)

0.100 ± 0.010

(2.54 ± 0.254)

0.275 ± 0.005

(6.98 ± 0.127)

0.215 ± 0.005

(5.46 ± 0.127)

SOLDER PAD DIMENSIONS in inches (millimeters)

MODEL a b l

PSF2012 0.085 (2.16) 0.070 (1.78) 0.080 (2.03)

PSF4527 0.155 (3.94) 0.230 (5.94) 0.205 (5.21)

200

150

100

00 0.5 1.0 1.5 2.0

POWER IN W

PSF2012

PSF4527

HEAT RISE IN °C (ABOVE AMBIENT)

120

100

- 55 0 25 200

AMBIENT TEMPERATURE IN °C

RATED POWER IN %

- 25 1751501251007550

MATERIAL SPECIFICATIONS

Element Precision deposited nickel chrome alloy with controlled annealing

Encapsulation Molded epoxy on the 2012 and molded thermoplastic on the 4527

Core Fire-cleaned high purity ceramic

Termination Standard leadframe material is solder-coated copper on the 2012 and solder-coated bronze on the 4527

PAC KAGING

MODEL

REEL

TAPE WIDTH DIAMETER PIECES/REEL PACKAGING CODE

LEAD (Pb)-FREE LEAD (Pb)-BEARING

PSF2012 12 mm/embossed plastic 330 mm/13" 2000 EA TA

PSF4527 24 mm/embossed plastic 330 mm/13" 1200 EA TA

www.vishay.com For technical questions, contact: ff2aresistors@vishay.com Document Number: 30162

322 Revision: 14-Apr-10

PSF

Vishay Dale Metal Film Resistors, High Precision,

High Stability, Surface Mount

TEMPERATURE COEFFICIENT OF RESISTANCE

Temperature coefficient (TC) of resistance is normally stated as the maximum amount of resistance change from the original + 25 °C value

as the ambient temperature increases or decreases. This is most commonly expressed in parts per million per degree centigrade (ppm/°C).

The resistance curve over the operating temperature range is usually a non-linear curve within predictable maximum limits. PSF resistors

have a very uniform resistance temperature characteristic when measured over the operating range of - 20 °C to + 85 °C. The standard

temperature coefficients available are

E = ± 25 ppm/°C, X = ± 15 ppm/°C, Y = ± 10 ppm/°C, and Z = ± 5 ppm/°C.

Some applications of the PSF require operation beyond the specifications of - 20 °C to + 85 °C. The change in temperature coefficient of

resistance is very small (less than ± 0.05 ppm/°C) over the expanded temperature range of - 55 °C to + 150 °C. Therefore, when operating

outside the range of - 20 °C to + 85 °C, the designer can plan for a worst case addition of ± 0.05 ppm/°C for each degree centigrade beyond

either - 20 °C or + 85 °C as indicated in the graph. This applies to all four temperature coefficient codes.

Example:

Assume the operating characteristics demand a temperature range from - 55 °C to + 125 °C. This requires a ± 35 °C Δ below - 20 °C and a

± 40 °C Δ above + 85 °C. The extreme Δ being ± 40 °C means that the worst case addition to the specified TC limit of ± 0.05 ppm/°C times

± 40 °C or ± 2 ppm/°C. Therefore, a Z which is characterized by a base TC limit of ± 5 ppm/°C over the temperature range of - 20 °C

to + 85 °C will exhibit a maximum temperature coefficient of ± 7 ppm/°C over the expanded portion of the temperature range of - 55 °C

to 125 °C.

- 50 - 30- 40 - 20 90 150140130120110100

E, X, Y, OR Z EXPANDED

OPERATING RANGE

+ 85 °C to + 150 °C

EXPANDED

OPERATING RANGE

- 55 °C to - 20 °C

- 20 °C to + 85 °C

BASE TC LIMIT

ppm/°C

ADDITION TO BASE TC IN THE

EXPANDED PORTION OF THE

TEMPERATURE RANGE

PERFORMANCE

TEST CONDITIONS OF TEST TEST RESULTS

(TYPICAL TEST LOTS)

Life MIL-STD-202, method 108, 1000 h rated power at + 85 °C ≤ ± 0.04 %

Short time overload MIL-PRF-55342, paragraph 4.8.6 ≤ ± 0.01 %

Thermal shock MIL-STD-202, method 107, - 65 °C to + 150 °C ≤ ± 0.02 %

Low temperature operation MIL-PRF-55342, paragraph 4.8.5 ≤ ± 0.02 %

Resistance to bonding exposure MIL-STD-202, method 210 ≤ ± 0.02 %

Moisture resistance MIL-PRF-55342, paragraph 4.8.9 ≤ ± 0.08 %

Solder mounting integrity MIL-PRF-55342, paragraph 4.8.13, 3 kg for 30 s No evidence of mechanical damage

Dielectric withstanding voltage MIL-STD-202, methods 301 and 105 ≤ ± 0.01 %

Solderability MIL-STD-202, method 208 95 % coverage

Legal Disclaimer Notice

www.vishay.com Vishay

Revision: 12-Mar-12 1Document Number: 91000

Disclaimer

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

RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

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 in any datasheet or in any other

disclosure relating to any product.

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or

the continuing production of any product. To the maximum extent permitted by applicable law, Vishay 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,

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Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical

requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements

about the suitability of products for a particular application. 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. Parameters

provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All

operating parameters, including typical parameters, must be validated for each customer application by the customer’s

technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,

including but not limited to the warranty expressed therein.

Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining

applications or for any other application in which the failure of the Vishay product could result in personal injury or death.

Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree

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damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay

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

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Material Category Policy

Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the

definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council

of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment

(EEE) - recast, unless otherwise specified as non-compliant.

Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that

all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.