
12-17-98
SB98107
Rev. A
Aircraft Limiter
Fast
-
Acting
ACH
Form No. ACH
Page 1 of 2
BIF Doc #1041
Bussmann
Catalog Symbol:
ACH
Fast-Acting
Ampere Rating:
1 to 60 Amperes
Voltage Rating:
208 Volts AC
125 Volts DC
Interrupting Rating:
6000A @ 120 VAC
4200A @ 208 VAC
6000A @ 125 VDC
At sea level to 6000 ft.
Test specification - carry 200% rated current for 5 minutes,
open at 240% within 5 minutes.
For Military Use
Qualified to MIL-F-5372C
Military Type
Designation
MS28938-02
MS28938-03
MS28937-05
MS28937-10
MS28938-15
MS28937-20
Buss Cat.
Symbol
ACH2
ACH3
ACH5
ACH10
ACH15
ACH20
Military Type
Designation
MS28938-25
MS28937-30
MS28938-35
MS28937-40
MS28937-50
MS28937-60
Buss Cat.
Symbol
ACH25
ACH30
ACH35
ACH40
ACH50
ACH60
Symbol
ACH
Amperes
2, 3, 5, 10, 15,
20, 25 or 30
A
B
C
D
1.97∑
(50.0mm)
2.22∑
(56.39mm)
0.06∑
0.48∑
(12.3mm)
0.55∑
1.33∑
(33.8mm)
1.45∑
(36.83mm)
(1.59mm)
0.09∑
(2.27mm) (13.97mm)
ACH
35, 40, 50 or 60
Buss Aircraft Fuses
Mechanical Indicating - Limiter type
ACH limiters are designed to meet the very rigorous require-
ments of high speed, high performance aircraft.
Isolate faults or grounds in aircraft electric systems of
120/208 volts 400 cycles AC or 125 volts DC.
ACH limiters give visual indication when open by a spring-
activated pin that extends from the limiter body.
The knife blade terminals on ACH limiters are silver-plated.
Limiters are made with a silicone body that assures reliable
performance under severe conditions.
Designed to withstand exposure to moisture, fungus, salt
spray, sand and dust, and mechanical vibration and shock.
Dimensional Data
All other tolerances (± 0.005) in
(± 0.13) mm
BUSS
ACH
30
D
A
B
C
.425"
(10.8mm)
0.98"
(25.0mm)
0.19"
(4.76mm)