PTC Resistors

PTC Resistors
These components work like slow blow fuses, however, they reset after 20 seconds, but only if no current is detected. Mounted in series to the speaker, they are well suited to protect them against overload.

The calculator below is set in such a way that the PTC resistor cuts off after 1 to 10 seconds at the power indicated.

PTC Calculator
Please enter decimal comma as "."
Power handling in W: Impedance in Ohm:   Type PTC:
According to the manufacturer the fuse switches off after 3 seconds at Watt
further information:
Copyright © Iris Strassacker. 2003. All rights reserved - Warranty excluded

Input instruction (a guide line according to our experience):
For
- bass drivers the rated power handling may be entered
- tweeters with 10 mm dome diameter ca. 1 Watt should be entered
- tweeters with 19 mm dome diameter ca. 4 Watt should be entered
- tweeters with 25 mm dome diameter ca. 8 Watt should be entered
- PA tweeters half the the rated power handling should be entered

Rated Voltage: 50V
Ambient temperature
range
-40 to +85 Grad C
Shape:
 
Disc with < 3.0 mm thickness with
terminal lugs spaced 5.1 mm or from I > 2A: 10.2 mm


Listed in the table:
Dimension: D indicates the diameter of the disc.
Rated voltage: Cut-off at 1.5 x rated power after roughly 3 seconds.
Resistance:    That's the factory setting

Order No. Type Rated voltage
I/A
Resistance
R/Ohm
D/mm Price
I-7021 SE 010 0.1 4.5 7.4 EUR 1,40 excl. VAT: € 1.18 / $ 1.39
I-7023 SE 020 0.2 2.84 7.4 EUR 1,50 excl. VAT: € 1.26 / $ 1.49
I-7024 SE 025 0.25 1.95 7.4 EUR 1,60 excl. VAT: € 1.34 / $ 1.59
I-7026 SE 030 0.3 1.36 7.4 EUR 1,80 excl. VAT: € 1.51 / $ 1.78
I-7025 SE 040 0.4 0.86 7.6 EUR 1,70 excl. VAT: € 1.43 / $ 1.69
I-7030 SE 050 0.5 0.77 7.9 EUR 1,80 excl. VAT: € 1.51 / $ 1.78
I-7032 SE 065 0.65 0.48 9.7 EUR 1,80 excl. VAT: € 1.51 / $ 1.78
I-7034 SE 075 0.75 0.40 10.4 EUR 1,80 excl. VAT: € 1.51 / $ 1.78
I-7035 SE 090 0.9 0.31 11.7 EUR 1,90 excl. VAT: € 1.60 / $ 1.88
I-7037 SE 110 1.1 0.25 13.0 EUR 1,90 excl. VAT: € 1.60 / $ 1.88
I-7040 SE 135 1.35 0.19 14.5 EUR 1,90 excl. VAT: € 1.60 / $ 1.88
I-7038 SE 160 1.6 0.14 16.3 EUR 1,90 excl. VAT: € 1.60 / $ 1.88
I-7044 SE 185 1.85 0.12 17.8 EUR 1,90 excl. VAT: € 1.60 / $ 1.88
I-7046 SE 250 2.5 0.08 21.3 EUR 1,95 excl. VAT: € 1.64 / $ 1.93
I-7048 SE 300 3.0 0.06 24.9 EUR 1,95 excl. VAT: € 1.64 / $ 1.93
 

Home