Bussmann
Aircraft Limiter ACH
Fast-Acting
Dimensional Data All other tolerances ( 0.005) in
( 0.13) mm
A
D
BUSS
30
C
Catalog Symbol: ACH
ACH
Fast-Acting
B
Ampere Rating: 1 to 60 Amperes
Voltage Rating: 208 Volts AC
125 Volts DC
Interrupting Rating:
6000A @ 120 VAC
0.98"
4200A @ 208 VAC
(25.0mm)
.425"
6000A @ 125 VDC
(10.8mm)
At sea level to 6000 ft.
Test specification - carry 200% rated current for 5 minutes,
open at 240% within 5 minutes.
0.19"
(4.76mm)
Buss Aircraft Fuses
For Military Use
Mechanical Indicating - Limiter type
Qualified to MIL-F-5372C
Military Type Buss Cat. Military Type Buss Cat.
ACH limiters are designed to meet the very rigorous require-
Designation Symbol Designation Symbol
ments of high speed, high performance aircraft.
MS28938-02 ACH2 MS28938-25 ACH25
Isolate faults or grounds in aircraft electric systems of
MS28938-03 ACH3 MS28937-30 ACH30
120/208 volts 400 cycles AC or 125 volts DC.
MS28937-05 ACH5 MS28938-35 ACH35
ACH limiters give visual indication when open by a spring-
MS28937-10 ACH10 MS28937-40 ACH40
activated pin that extends from the limiter body.
MS28938-15 ACH15 MS28937-50 ACH50
The knife blade terminals on ACH limiters are silver-plated.
MS28937-20 ACH20 MS28937-60 ACH60
Limiters are made with a silicone body that assures reliable
performance under severe conditions.
Symbol Amperes A B C D
Designed to withstand exposure to moisture, fungus, salt
ACH 2, 3, 5, 10, 15, 1.97 0.06 0.48 1.33
spray, sand and dust, and mechanical vibration and shock.
20, 25 or 30 (50.0mm) (1.59mm) (12.3mm) (33.8mm)
2.22 0.09 0.55 1.45
ACH 35, 40, 50 or 60
(56.39mm) (2.27mm) (13.97mm) (36.83mm)
Form No. ACH
Page 1 of 2
12-17-98
BIF Doc #1041
SB98107 Rev. A
Bussmann
Aircraft Limiter ACH
Fast-Acting
Time-Current Characteristic CurvesAverage Melt
AMPERE
RATING
100
Fuseblocks
10
All metal parts silver-plated.
Clips are beryllium copper.
The blocks have molded melamine base and are qualified to
MIL-F-5373C.
1 to 30 Amp 35 to 60 Amp
1
Catalog Dimension of Catalog Dimension of
Number base, inches Number base, inches
3887 (1-pole) 0.688 3.125 3889 (1-pole) 0.844 3.375
3888 (2-pole) 1.188 3.125 3890 (2-pole) 1.594 3.375
3967 (3-pole) 1.625 3.125 3968 (3-pole) 2.25 3.375
.1
.01
CURRENT IN AMPERES
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin
is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information con-
tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Form No. ACH
Page 2 of 2
12-17-98
BIF Doc #1041
SB98107 Rev. A
TIME IN SECONDS
4
10
10
20
30
40
100 50
60
1,000
2,000