232276260222 - Philips Semiconductors / NXP Semiconductors

1999 Feb 10 309

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

FEATURES

•Reduced size of final equipment

•Low assembly costs

•Higher component and equipment

reliability.

APPLICATIONS

•Power supplies

•Printers

•Computers

•Battery chargers

•Automotive

•Converters

•CD-ROM.

DESCRIPTION

The resistors are constructed on a

high grade ceramic body (aluminium

oxide). Internal metal electrodes are

added at each end and connected by

a resistive paste which is applied to

the top surface of the substrate. The

composition of the paste is adjusted

to give the approximate resistance

required and the value is trimmed to

within tolerance, by laser cutting of

this resistive layer.

The resistive layer is covered with a

protective coating and printed with the

resistance value. Finally, the two

external end terminations are added.

To guarantee optimum solderability

the outer layer consists of a

lead-tin alloy.

QUICK REFERENCE DATA

DESCRIPTION VALUE

Resistance range 1 Ωto10 MΩ;

jumper E24 series

Resistance tolerance 5%; 2%

Temperature coefﬁcient:

1Ω≤R < 4.99 Ω≤±300 ×10−6/K

5.1 Ω≤R < 9.76 Ω≤±200 ×10−6/K

10 Ω≤R<1MΩ≤±100 ×10−6/K

1MΩ≤R < 10 MΩ≤±200 ×10−6/K

Absolute maximum dissipation at Tamb =70°C1W

Maximum permissible voltage 250 V (DC or RMS)

Climatic category (IEC 60068) 55/125/56

Operating temperature range −55 °C to +125 °C

Basic speciﬁcation IEC 60115-8

1999 Feb 10 310

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

ORDERING INFORMATION

Table 1 Ordering code indicating resistor type and packaging

TYPE TOL.

(%) SERIES

ORDERING CODE 2322 762 .....

BLISTER TAPE ON REEL

4000 units

PRC221 ±5E24 60...

±2 80...

Jumper

PRC221 −− 90000

Ordering code (12NC)

•The resistors have a 12-digit

ordering code starting with

2322 762; see Table 1.

•The subsequent 2 digits indicates

the resistor type and packaging

•The remaining digits indicate the

resistance value:

– The first 2 digits indicate the

resistance value.

– The last digit indicates the

resistance decade in

accordance with Table 2.

Table 2 Last digit of 12NC

RESISTANCE

DECADE LAST DIGIT

1 to 9.1 Ω8

10 to 91 Ω9

100 to 910 Ω1

1 to 9.1 kΩ2

10 to 91 kΩ3

100 to 910 kΩ4

1 to 9.1 MΩ5

10 MΩ6

ORDERING EXAMPLE

The ordering code of a PRC221

resistor, value 47 Ω with 5%

tolerance, supplied on blister tape of

4000 units per reel is:

2322 762 60479.

1999 Feb 10 311

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal

resistance are taken from the

E24 series for resistors

with a tolerance of ±5% and ±2%.

The values of the E24 series are in

accordance with

“IEC publication 60063”

Limiting values

Note

1. The maximum voltage that may

be continuously applied to the

resistor element, see

“IEC publication 60115-8”

TYPE LIMITING

VOLTAGE(1)

(V)

LIMITING

POWER

(W)

PRC221 250 1

DERATING

The power that the resistor can dissipate depends on the operating

temperature; see Fig.1.

Fig.1 Maximum dissipation (Pmax) in percentage of rated power

as a function of the ambient temperature (Tamb).

handbook, halfpage

CCB413

70 100−55 50 Tamb (°C)

100

125

Pmax

(%Prated)

1999 Feb 10 312

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

MECHANICAL DATA

Mass per 100 units

Marking

Each resistor is marked with the

nominal resistance value.

4-DIGIT MARKING

For values up to 910 Ω the R is used

as a decimal point. For values of 1 kΩ

or greater the first 3 digits apply to the

resistance value and the fourth

indicates the number of zeros to

follow.

Example

PACKAGE MARKING

The packaging is also marked and

includes resistance value, tolerance,

catalogue number, quantity,

production period, batch number and

source code.

TYPE MASS

(g)

PRC221 4.25

MARKING RESISTANCE

12R0 12 Ω

8202 82 kΩ

Outlines

Table 3 Chip resistor type and relevant physical dimensions; see Fig.2

TYPE L

(mm) W

(mm) T

(mm) tt

(mm) tb

(mm)

PRC221 6.4 ±0.2 3.1 ±0.2 0.55 ±0.10 0.65 ±0.25 1.3 ±0.25

Fig.2 Outlines.

For dimensions see Table 3.

inner electrode

end termination

protective coat

CCB286

8202

marking

protective coat

resistor layer

ceramic substrate

1999 Feb 10 313

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

TESTS AND REQUIREMENTS

Essentially all tests are carried out in accordance with the

schedule of

“IEC publication 60115-8”

, category

55/125/56 (rated temperature range −55 to +125 °C;

damp heat, long term, 56 days). The testing also covers

the requirements specified by EIA and EIAJ.

The tests are carried out in accordance with

IEC publication 60068,

“Recommended basic climatic and

mechanical robustness testing procedure for electronic

components”

and under standard atmospheric conditions

in accordance with

“IEC 60068-1”

, subclause 5.3.

Unless otherwise specified the following values apply:

Temperature: 15 °Cto35°C

Relative humidity: 45% to 75%

Air pressure: 86 kPa to 106 kPa

(860 mbar to 1060 mbar).

In Table 4 the tests and requirements are listed with

reference to the relevant clauses of

“IEC publications 60115-8 and 60068”

; a short

description of the test procedure is also given. In some

instances deviations from the IEC recommendations were

necessary for our method of specifying.

All soldering tests are performed with mildly activated flux.

Table 4 Test procedures and requirements

IEC

60115-8

CLAUSE

IEC

60068-2

TEST

METHOD

TEST PROCEDURE REQUIREMENTS

Tests in accordance with the schedule of IEC publication 60115-8

4.4.1 visual

examination no holes; clean surface;

no visible damage

4.17 20 (Ta) solderability unmounted chips completely immersed for

2±0.5 s in a solder bath at 235 ±2°Cgood tinning (≥95% covered);

no visible damage

4.18 20 (Tb) resistance to

soldering heat unmounted chips; 10 ±1s;260±5°C no visible damage

∆R/R max.: ±(0.5% + 0.05 Ω)

4.13 short time

overload room temperature; dissipation 6.25 ×Pn;

5 s (voltage not more than 2 ×Vmax)∆R/R max.: ±(1% + 0.05 Ω)

4.33 bending resistors mounted on a 90 mm glass

epoxy resin PCB (FR4), bending: 2 mm no visible damage

∆R/R max.: ±(1% + 0.05 Ω)

4.19 14 (Na) rapid change of

temperature 30 minutes at LCT and

30 minutes at UCT; 5 cycles no visible damage

∆R/R max.: ±(0.5% + 0.05 Ω)

4.6.1.1 insulation

resistance 250 V (DC) after 1 minute Rins min.: 10000 MΩ

4.24.2 3 (Ca) damp heat

(steady state) 56 days; 40 ±2°C; 93 +2/−3% RH;

loaded with 0.01 Pn

no visible damage

∆R/R max.: ±(3% + 0.05 Ω)

4.25.1 endurance 1000 +48/−0 hours; 70 ±2°C;

nominal dissipation;

1.5 hours on, 0.5 hour off

no visible damage

∆R/R max.: ±(3% + 0.05 Ω)

4.8.4.2 temperature

coefﬁcient at 20/LCT/20 °C and 20/UCT/20 °C:

1Ω≤R<4.99 Ω∆R/R max.: ±300 ×10−6/K

5.1 Ω≤R<9.76 Ω∆R/R max.: ±200 ×10−6/K

10 Ω≤R<1MΩ∆R/R max.: ±100 ×10−6/K

1MΩ≤R<10 MΩ∆R/R max.: ±200 ×10−6/K

1999 Feb 10 314

Philips Components Product speciﬁcation

Power chip resistor

size 2512 PRC221

5%; 2%

Other tests in accordance with IEC 60115 clauses and IEC 60068 test method

4.17 20 (Ta) solderability

(after ageing) 8 hours steam or 16 hours at 155 °C;

unmounted chips completely immersed for

2±0.5 s in a solder bath at 235 ±2°C

good tinning (≥95% covered);

no visible damage

Other applicable tests

leaching unmounted chips 60 ±1 s; 260 ±5°C good tinning; no leaching

(JIS) C

5202 7.5 resistance to

damp heat

(steady state)

56 days; 40 ±2°C; 93 +2/−3% RH;

loaded with 1 W or Vmax;

1.5 hours on, 0.5 hour off

no visible damage

∆R/R max.: ±(2% + 0.05 Ω)

IEC

60115-8

CLAUSE

IEC

60068-2

TEST

METHOD

TEST PROCEDURE REQUIREMENTS