120 Datasheet, PDF (1/1 Pages) Cooper Bussmann, Inc. – Auto, Manual & Modified Reset Circuit Protectors

SHORTSTOP^®
Auto, Manual & Modified Reset Circuit Protectors
Bussmann^®
Series 120
SPECIFICATIONS
Single Pole Thermal Type Breakers
Ratings: 8A to 50A; 12 VDC; 24 VDC.
Operating Temperature: –10°F (–23°C) to 150°F (65°C).
Storage Temperature: –20°F (–29°C) to 200°F (93°C).
Applications: Battery chargers, trucks, buses, RV’s, trolling motors, etc.
Approvals: Complies with SAE Standard J553.
Terminal Options
.69"
(17.5)
.66"
(16.8)
A
.56"
(14.2)
.69"
(17.5)
B
.56"
(14.2)
Two 10-32 studs:
.66" (AUX); .56" (BAT)
.69"
(17.5)
C
.66"
(16.8)
Two 10-32 studs:
.56" (AUX & BAT)
.99"
(25.2)
D
.41"
(10.3)
Two 10-32 studs:
.66" (AUX & BAT)
.84"
(21.4)
.41" E
(10.3)
.56"
(14.2)
One .25" Q.C. (AUX);
One 10-32 stud (BAT)
.30"
(7.7)
.99"
(25.2)
J .41"
(10.3)
Two .25" Q.C.
(AUX & BAT)
.69"
(17.5)
.41"
(10.3)
H
.56"
(14.2)
Double .25" Q.C. (AUX);
One 10-32 stud (BAT)
.84"
(21.4)
K .54"
(13.7)
Double .25" Q.C. (AUX);
Single .25" Q.C. (BAT)
.69"
(17.5)
Two .25" Q.C. (AUX & BAT)
Perpendicular
Orientation
L
.37" (9.4)
Two 10-32 studs
(AUX & BAT)
TEMPERATURE DERATING CURVES
200%
150%
100%
50%
0%
-50º 0º
50º 77º 100º 150º 200º 250º
TEMPERATURE IN DEGREES F.
TIME VS. PERCENT OF RATED CURRENT
600%
500%
400%
300%
200%
100%
0 5 10 15 20 3040 100 200 500
TIME IN SECONDS
Cover & Bracket Options
METAL COVER
1.24"
(31.5)
.79"
(20.1)
1.24"
(31.5) .79"
(20.1)
1.56"
(39.6)
.38" (9.6)
.64"
(16.3)
.69"
(17.5)
O Bracket
A Bracket
1.56"
(39.6)
1.24"
(31.5)
.79"
(20.1)
.69"
(17.5)
1.24" .79"
(31.5) (20.1)
.38" (9.6)
.69"
(17.5)
B Bracket
C Bracket
PLASTIC COVER
1.27"
(32.3)
.83" ^1.56"
(21.1) (39.6)
.37" (9.4)
.62"
(15.7)
O Bracket
1.56"
(39.6)
.83"
1.27" ^(21.1)
(32.3)
A Bracket
.37" (9.4)
1.27"
(32.2)
B Bracket
1.27" _.83"
(32.2) (21.1)
C Bracket
1.56"
(39.6)
.12" (3.0)
dia. boss
.06"
(1.5)
.62"
(15.7)
Reset button
.62" (15.7)
Ref. (Typ)
w/base attached
E Bracket
1.27"
(32.3)
.83"
(21.1)
Series 123
O Bracket w/reset
PART NUMBERING SYSTEM
Series
Terminal
t¹ t² t t
Rating Bracket
tt – t
Mtg. Holes Cover* Options
Hardware
t
t – tt – tt
121 – Auto Reset
12 VDC
122 – Modified
12 VDC
123 – Manual
24 VDC
115 VAC
124 – Auto
24 VDC
125 – Modified
24 VDC
A – Two 10-32 studs; 08 – 8 amps O – No bracket 0 – No bracket M – Metal
01 – Waterproof
.66 (Aux), .56 (Bat) 10 – 10 amps A – Bracket
1 – .140 dia.
P – Plastic
(metal
B – Two 10-32 studs; 12 – 12 amps B – Bracket
2 – .196 dia.
covers only)
.56 (Aux & Bat)
15 – 15 amps C – Bracket
3 – .237 dia.
02 – Splashproof
C – Two 10-32 studs; 20 – 20 amps E – Bracket
(metal only)
(optional on
.66 (Aux & Bat)
25 – 25 amps (plastic only) 4 – .265 dia.
metal covers -
***D – Two .250 QC;
30 – 30 amps
(plastic only)
add 02 suffix;
(Aux & Bat)
35 – 35 amps
5 – .228 dia.
std. on plastic
***E – One .250 QC (Aux); 40 – 40 amps
(plastic only)
covers - omit
One 10-32 stud (Bat) 50 – 50 amps
6 – .221 dia.
02 suffix.)
** H – One 10-32 stud
(metal only)
.56 (Bat), Double
.250 QC (Aux)
***J – Single .250 QC (Bat)
* Series 123 available in plastic cover only. Series
Double .250 QC (Aux)
122 & 125 available in metal cover only.
***K – Two .250 QC (Aux & Bat)
** 40A maximum
L – Two 10-32 studs; .37 (Aux & Bat)
*** 30A maximum
WA – Whiz-lock nut
assembled
WB – Whiz-lock
nut bulk un-
assembled
HA – Nut & lock
washer
assembled
HB – Nut & lock
washer bulk
unassembled
KA – Keps lock nut
assembled
KB – Keps lock
nut bulk
unassembled
12-16-98
SB98107 Rev. A
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 BIF 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 contained in this bulletin. Once a product has been selected, it should be tested by the
user in all possible applications.
Form No. 120 ShortStop
Page 1 of 1
BIF Document: 2067