User Documentation
Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Sepatate arrangement
Compound arrangement
AAP21 4 FS
250 V
250 V
AAP21 4 FS 10-36V
 10-36 V
AAP21 4 FS 30-70V
 30-70 V
AAP21 4 FS 60-150V
60-150 V
AAP21 4 DT
AAP21 4 FS 100-250V
100-250 V
AAP21 4 FS
AAP21 10 LO…
AAP21 4 LI…
AAP21 4 DT
250 V
250 V
250 V
250 V
6,3 A / ΔT < 40 K 57 A / ΔT < 40 K 32 A / ΔT < 40 K 20 A / ΔT < 40 K
4 W (6,3 A)
2,5 W (6,3 A)
4,47 mΩ
with dummy fuse link no. 2
0,33 mΩ 0,31 mΩ 1,3 mΩ
4 mm²
10 mm²
4 mm²
4 mm²
0,5 - 4mm² 
0,5 -10mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 10mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 4mm² 
0,5 - 10mm² 
0,5 - 4mm² 
0,5 - 4mm² 
26 - 12 AWG
20 - 6 AWG
26 - 12 AWG
26 - 12 AWG
12 mm
18 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
I
max
: 31,5 A 6,3 A
250 V
250 V
AAP21 10 LO.../ 5 x AAP21 4 FS  AAP21 10 LO.../ AAP21 4 FS/ 3 x AAP21 4 LI…
I
max
: 6,3 A | 20 A 18,9 A | 57 A | 57 A
250 V
250 V
AAP21 10 LO.../ AAP21 4 FS/ 3 x AAP21 4 LI... |  AAP21 10 LO.../3xAAP21 4 FS | AAP21 10 LO.../ 3xAAP21 4 DT | 
AAP21 10 LO.../ AAP21 4 DT/ 3 x AAP21 4 LI … AAP21 10 LO.../ AAP21 4 LI…
Information for further cross-connector arrangements will be provided on request.
 - Conductor cross section stranded
 - Conductor cross section solid
 - Cross section, American Wire Gauge
 - Stripping length
A - Continuous feed in with Supply terminal and share with distribution terminal blocks
 - Rated current
 - Rated voltage
Service life acc. to IEC 60947-7-1 
 - max. no. of actuations
IECEx / ATEX Terminal and Cross-Connection Arrangements:
 - Rated conductor cross section
Compound arrangement
 - Rated power dissipation Pvk
Technical data according to IEC/EN 60079-7 (increased safety "ec"):
Separate arrangement
 - Contact resistance with rated 
 conductor
Application Case
 - Conductor cross section flexible 
Allocated currents of AAP21 10 LO… combination with:
Please attend the details in the technical 
data above.
Please attend the details in the technical 
data above.
AAP21 4 DT
AAP21 4 FS
Max voltage data according to IEC/EN 60079-7 in conjunction with
protective earth terminal blocks of the A-Series, (increased safety "ec"): 
Version: AAP21 4 FS;12072843 ; Index: 00; Date: 10.2017
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