2000 Oct 20

24

BCcomponents

Product specification

Cemented wirewound resistors

AC01/03/04/05/07/10/15/20

4.23

climatic sequence:

4.23.2

Ba

dry heat

16 hours; 200

°C

4.23.3

Db

damp heat

(accelerated)

24 hours; 55

°C; 95 to 100% RH

4.23.4

Aa

cold

2 hours;

−40 °C

4.23.5

M

low air pressure

1 hour; 8.5 kPa; 15 to 35

°C

4.23.6

Db

damp heat

(accelerated)

remaining cycles

5 days; 55

°C; 95 to 100% RH

∆R/R max.: ±1% + 0.05 Ω

4.24.2

3 (Ca)

damp heat

(steady state)

56 days; 40

°C; 90 to 95% RH;

dissipation

no visible damage

∆R/R max.: ±1% + 0.05 Ω

4.8.4.2

temperature

coefficient

at 20/

−40/20 °C, 20/200/20 °C:

R< 10

Ω

TC

R

TC

temperature rise

hot-spot temperature less

than maximum body

temperature

4.13

short time overload

room temperature; dissipation 10

5 s (voltage not more than

1000 V/25 mm)

∆R/R max.: ±2% + 0.1 Ω

4.25.1

endurance (at 40

°C)

1.5 hours on and 0.5 hours off

no visible damage

∆R/R max.: ±5% + 0.1 Ω

4.25.1

endurance (at 70

°C)

1.5 hours on and 0.5 hours off

no visible damage

∆R/R max.: ±5% + 0.1 Ω

4.23.2

27 (Ba)

endurance at upper

category temperature

1000 hours; 200

°C; no load

no visible damage

∆R/R max.: ±5% + 0.1 Ω

Other tests in accordance with IEC 60115 clauses and IEC 60 068 test method

4.29

45 (Xa)

component solvent

resistance

70% 1.1.2 trichlorotrifluoroethane and

no visible damage

4.18

20 (Tb)

resistance to soldering

heat

10 s; 260

±5 °C; flux 600

∆R/R max.: ±0.5% + 0.05 Ω

4.17

20 (Tb)

solderability

(after ageing)

16 hours steam or 16 hours at 155

°C;

2

±0.5 s in solder at 235 ±5 °C;

flux 600

good tinning (

≥95%

covered); no damage

4.5

tolerance on

resistance

applied voltage (

±10%):

R

R< 10

Ω: 0.1 V

10

Ω≤ R< 100 Ω: 0.3 V

100

Ω≤ R< 1 kΩ: 1 V

1k

Ω≤ R< 10 kΩ: 3 V

10 k

Ω≤ R ≤ 33 kΩ: 10 V

IEC

60115-1

CLAUSE

IEC

60068

TEST

METHOD

TEST

PROCEDURE

REQUIREMENTS