User Documentation
Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Technical data according to IEC/EN 60079-7 (increased safety "ec"):
AAP21 10 LO…
250 V
57 A / ΔT < 40 K
0,33 mΩ
10 mm²
0,5 -10mm² 
0,5 - 10mm² 
0,5 - 10mm² 
20 - 6 AWG
18 mm
AAP21 4 DT
AAP21 4 FS
AAP21 4 LI…
250 V
250 V
250 V
20 A / ΔT < 40 K 6,3 A / ΔT < 40 K 32 A / ΔT < 40 K
1,3 mΩ 4,47 mΩ
with dummy fuse link no. 2
0,31 mΩ
4 mm²
4 mm²
4 mm²
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
26 - 12 AWG 26 - 12 AWG 26 - 12 AWG
12 mm
12 mm
12 mm
50 cycles
AAP21 10 LO…
57 A / ΔT < 40 K
AAP21 4 LI…
57 A / ΔT < 40 K
distribution terminals 
≥ 2
57 A / ΔT < 40 K
distribution terminals 
≥ 3
31,5 A / ΔT < 40 K
distribution terminals 
≥ 5
AAP21 4 DT
AAP21 4 FS
 - cross section, American Wire 
...Gauge
 - Stripping length
Service life acc. to IEC 60947-7-1 
 - max. no. of actuations
 - Contact resistance with rated
 conductor 
 - Rated conductor cross section
 - Conductor cross section solid
 - Conductor cross section stranded
 - Conductor cross section flexible 
 - Contact resistance with rated
 conductor 
 - Conductor cross section stranded
 - Conductor cross section solid
 - cross section, American Wire 
...Gauge
 - Rated current
 - Rated voltage
 - Rated conductor cross section
 - Conductor cross section flexible 
 - Stripping length
 - Rated voltage
 - Rated current
Allocated currents of AAP21 10 LO… combination with:
Version: AAP21 4 DT;12072846 ; Index: 01; Date: 04.2018
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