Series 18X Hi-Amp Circuit Breaker
Auto, Manual & Switchable Reset Circuit Breakers
Specifications
Single Pole Thermal Type Breakers
Applications:
Typically used in auxiliary and accessory circuits in truck, bus’, RVs and marine systems.
Others include battery chargers and DC audio systems. Series 181, 184 & 185 are sealed for engine
compartment and bilge area applications.
Rating:
25-150A, 30Vdc; 48Vdc (Series 184 & 185)
Interrupt Rating:
3000A @ 30Vdc
Operating Temperature Rating:
–25°F (–32°C) to 180°F (82°C)
Storage Temperature Rating:
–30°F (–34°C) to 300°F (149°C)
Materials:
Black UL-rated 94V0 thermoset plastic. Thermoplastic elastomer stud insulators are
provided on covered units with F-style (surface-mount) bases
Marking:
Standard marking includes amp ratings and part numbers. Custom markings also available.
Termination:
1/4-28 threaded studs
Torque Rating:
50 in-lbs (5.6N•m) max
Mounting Torque Rating:
Panel or surface-mount options; 50 in-lbs (5.6N•m) max. Threaded insert
option has a max torque of 25 in-lbs (2.8N•m).
Ingress Protection Rating:
IP67
Features / Options:
Series 184 & 185 have a unique reset mechanism which provides visual indication
of tripped condition. Series 185 also features a push-to-trip option
Compliances:
SAE J1625; ABYC E-11; CE; SAE J1171 (ignition protected)
Dimensions - in(mm)
Surface Mount
.26 (6.60) dia.
Mtg.holes (2)
1.05
(26.67)
(Dims. shown are for reference only. Consult factory for latest prints)
200%
% 0F RATED CURRENT
150%
100%
50%
TEMPERATURE DERATING CURVES
Reset lever
(Shown in
operating
position series
184/185)
.26 (6.60) dia.
Mtg.holes (2)
Panel Mount
Reset lever
(Shown tripped)
2.91
(73.91)
2.89
(73.41)
2.23
(56.64)
2.41
(61.21)
1.54
(39.12)
0%
-50º
0º
50º 77º 100º 150º
200º
250º
(-45º) (-18º) (10º)(25º)(38º) (65º) (93º) (121º)
TEMPERATURE IN DEGREES F °
(TEMPERATURE IN DEGREES C °)
% 0F RATED CURRENT
RE
SE
T
TIME VS. PERCENT OF RATED CURRENT
600%
1.90
(48.26)
Stud insulators
1.90
(48.26)
Molded
cover
Tamper proof
cover
500%
400%
300%
200%
100%
0
5
10 15
20 30 40 100 200 500
TIME IN SECONDS
Molded Trip button (Series 185)
cover
.31
(7.87)
.66
(16.76)
1.79
(45.47)
.89 (22.61)
.57
(14.49)
1.06
(26.92)
1.44*
(36.58)
1.44
(36.58)
1/4-28 Studs
.40
(10.16)
1.09*
(27.69)
*Overall heights of
Series 181 &183
Flange mount
gasket for
thru-wall
applications
(option 07)
Part Numbering System
Series
Rating
Mounting
1 8
181 – Type I, 30V
183 – Type I*, 30V
184 – Type III, 42V
185 – Type III-PTT, 42V
025 – 25 amps
030 – 30 amps
035 – 35 amps
040 – 40 amps
050 – 50 amps
060 – 60 amps
070 – 70 amps
080 – 80 amps
090 – 90 amps
100 – 100 amps
110 – 110 amps
120 – 120 amps
135 – 135 amps
150 – 150 amps
–
Terminal Hdwr.
–
Marking
F – Surface Mount
P – Panel Mount
*183 Available in Panel
Mount Only (Coverless)
00 – Ship w/o nuts
01 – Sems nuts installed
02 – Sems nuts shipped bulk
03 – Stainless Steel Std. nuts &
washers installed
04 – Stainless Steel Std. nuts &
washers shipped bulk
07 – Flange gasket & Sems nuts installed
(Panel Mount Only)
08 – Threaded insert and Sems nuts
installed
12 – Stainless steel nuts and lockwashers
installed
13 – Stainless steel Sems nut installed
0 – Blank cover
1 – Standard Marking; Part Number,
Amp Rating
181, 184, 185 Series - Top Surface
183 Series - Side Surface
S – Standard Ignition Protected
Marking
(Consult factory for special markings.)
71
Cooper Bussmann Transportation Products
• Phone: 800.845.6269 • Fax: 503.692.9091 • www.cooperbussmann.com
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