PCR0805F-18KFI - Welwyn Components, Ltd.

Precision Thick Film

Surface Mounted Resistors

PCR Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product speciﬁcation without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

09. 11

· Tolerance down to 0.1%

· Excellent load stability

· Termination available for wire bonding or soldering

· Resistance range 10 ohms to 1M ohms

· Any resistance value available within speciﬁed range

Dimensions of standard styles (mm) & Weight (g)

Wrap around planar

Style L W T A B* C Wt

0805 2.0 ± 0.3 1.25 ± 0.2 0.6 0.3 ± 0.15 0.9min 0.3 ± 0.1 0.009

1005 2.5 ± 0.3 1.25 ± 0.2 0.7 Not available 0.4 ± 0.15 0.015

1206 3.2 ± 0.4 1.6 ± 0.2 0.7 0.4 ± 0.2 1.7min 0.4 0.15 0.020

Precision Thick Film

Surface Mounted Resistors

PCR Series

•Tolerance down to 0.1%

•Excellent load stability

•Termination available for wire bonding or

soldering

•Resistance range 10 ohms to 1M ohms

•Any resistance value available within

specified range

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Issue D · 08.04

A subsidiary of

TT electronics plc

Welwyn Components

PCR0805 PCR1005 PCR1206 Notes

Power rating at 70°C watts 0.1 0.125 0.25

Resistance range ohms 10R to 1M

Limiting element voltage volts 100 150 200

TCR -55°C to +155°C ppm/°C 100

TCR +20°C to +70°C ppm/°C 50

Resistance tolerance % 0.1, 0.25, 0.5, 1

Values E24 & E96 preferred Any value to order

Thermal impedance °C/watt 360 290 200

For 10 devices mounted

on a 50 x 25 mm p.c.b. area

Ambient temperature range* °C -55 to 155

Physical Data

*See Application Notes

Wrap-around terminations

(3 faces)

Planar terminations

*This dimension determines the number of conductors which may pass under the surface mounted device.

Construction

Thick film resistor material, overglaze and organic protection

are screen printed on a 96% alumina substrate.

Adjustment

The components are adjusted to final value using a specially

developed technique, which assures optimum load stability

performance.

Terminations

Planar (or single-sided) termination is gold and suitable for

wire-bonding; wrap around is suitable for soldering.

Solderability

Wrap-around terminations have an electroplated nickel barrier

and solder coating, this ensures excellent ‘leach’ resistance

properties and solderability. They will withstand immersion in

solder at 260°C for 30 seconds.

Alternative styles for surface

mounting resistors

PCR_D.qxd 8/9/04 3:54 PM Page 1

Precision Thick Film

Surface Mounted Resistors

PCR Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product speciﬁcation without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

09. 11

Precision Thick Film

Surface Mounted Resistors

PCR Series

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com Issue D · 08.04

Welwyn Components

l a c i py Tmum i x aM

Load at rated power: 1000 hours at 70°C ∆R% 10 - 25k: 0.10 10 - 25k: 0.05

>25k - 1M: 0.4 >25k - 1M: 0.2

Load at rated power: 8000 hours at 70°C ∆R% 10 - 25k: 0.20 10 - 25k: 0.10

>25k - 1M: 0.80 >25k - 1M: 0.4

Load at 50% rated power: 1000 hours at 70°C ∆R% 10 - 1M: 0.10 10 - 1M: 0.03

Load at 50% rated power: 8000 hours at 70°C ∆R% 10 - 1M: 0.20 10 - 1M: 0.06

Shelf life: 12 months at room temperature ∆10.050.0%R

C° 551 t a o r eZC°07 ta rewop detar m or f gni tareD

Overload ∆40.0%R

Dry heat: 1000 hours at 155°C ∆40.01.0%R

Long term damp heat ∆40.01.0%R

Temperature rapid change ∆10.030.0%R

Resistance to solder heat ∆20.001.0%R

005s t l ovf oo r p ega t l oV

Operating Temperature Range

The chips can operate at a maximum temperature of 155°C

(see Performance Data). For soldered chips, the joint

temperature should not exceed 110°C. This condition is met

when the stated power levels at 70°C are used.

Mounting

This chip resistor is ideally suited for handling by automatic

methods due to its rectangular shape and the small

dimensional tolerances. Electrical connection to a ceramic

substrate or to a printed circuit board can be made by wire

bonding (eg suffix ‘G’ in PCR0805G) or by reflow soldering of

wrap-around terminations (eg suffix ‘F’ in PCR0805F). The ‘F’

terminations provide good leach properties and ensure

reliable contact. Due to the robust construction the resistor

chip can be immersed in the solder bath for 30 seconds at

260°C. This enables the resistor to be mounted on one side

of a printed circuit and other wire-leaded components on the

other side.

Performance Data

1.052.05.01%. loT/ez iS

PCR0805 10 to 1M 10 to 1M 100 to 1M 100 to 1M

PCR1005 10 to 1M 10 to 1M 100 to 1M 100 to 1M

PCR1206 10 to 1M 10 to 1M 100 to 1M 100 to 1M

Value Ranges

Application Notes

Packaging

Resistor chips are supplied taped and reeled on standard 8mm

tape to IEC 286-3.

Quantity per reel 3000 max.

Planar Terminations

Resistor chips are supplied in waffle packs.

PCR_D.qxd 8/9/04 3:54 PM Page 2

Precision Thick Film

Surface Mounted Resistors

PCR Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product speciﬁcation without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

09. 11

Precision Thick Film

Surface Mounted Resistors

PCR Series

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com Issue D · 08.04

Welwyn Components

PCR_D.qxd 8/9/04 3:54 PM Page 2

Ordering Procedure

Example: PCR0805 with solderable wraparound terminations at 10 kilohms and 0.1%

tolerance packed on a reel of up to 3000 pieces -

P C R 0 8 0 5 F – 1 0 K B I

Type

Termination

Solderable wraparound

0805 & 1206 only

Gold pad planar

All sizes

Value (use IEC62 code)

Tolerance (use IEC62 code)

0.1%

0.25%

0.5%

Packing

Tape

0805F, 1206F

Up to 3000/reel

Standard

Waffle

G Termination