Philips Components
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
The resistor is coated with a green
silicon cement which is not resistant
to aggressive fluxes. The coating is
non-flammable, will not drip even at
high overloads and is resistant to
most commonly used cleaning
solvents, in accordance with
“MIL-STD-202E” and
FEATURES
DESCRIPTION
• High power dissipation in
small volume
The resistor element is a resistive
wire which is wound in a single layer
on a ceramic rod. Metal caps are
pressed over the ends of the rod.
The ends of the resistance wire and
the leads are connected to the caps
by welding. Tinned copper-clad iron
leads with poor heat conductivity are
employed permitting the use of
relatively short leads to obtain stable
mounting without overheating the
solder joint.
• High pulse load handling
capabilities.
APPLICATIONS
“IEC 60068-2-45”.
• Ballast switching
• Shunt in small electric motors
• Power supplies.
QUICK REFERENCE DATA
VALUE
AC01 AC03 AC04 AC05 AC07 AC10 AC15 AC20
DESCRIPTION
Resistance range
0.1 Ω
to
0.1 Ω
to
0.1 Ω
to
0.1 Ω
to
0.1 Ω 0.68 Ω 0.82 Ω 1.2 Ω
to to to to
2 kΩ
4.7 kΩ 6.8 kΩ 8.2 kΩ 15 kΩ 27 kΩ 39 kΩ 56 kΩ
Resistance tolerance
±5%; E24 series
350 °C
Maximum permissible body temperature
Rated dissipation at Tamb = 40 °C
Rated dissipation at Tamb = 70 °C
Climatic category (IEC 60068)
Basic specification
1 W
3 W
4 W
5 W
7 W
10 W
15 W
20 W
0.9 W 2.5 W 3.5 W 4.7 W 5.8 W 8.4 W 12.5 W 16 W
40/200/56
IEC 60115-1
Stability after:
load, 1000 hours
∆R/R max.: ±5% + 0.1 Ω
∆R/R max.: ±1% + 0.05 Ω
∆R/R max.: ±2% + 0.1 Ω
climatic tests
short time overload
1998 Nov 18
2