Consumer Aftermarket
Product Catalog
Plug Fuses and Box Cover Units
Consumer Aftermarket Catalog
Plug Fuses, Adapters & Circuit Breakers
Plug Fuses
These fuses thread into fuse receptacles. Two types of threaded fuses are
available: Edison Base (brass threads) and Rejection Base (porcelain
threads). The two are not interchangeable. Two categories of plug fuses are
available. The medium-duty fuses (TL or SL) have a time-delay feature for
use on motor circuits. The heavy-duty fuses (T or S) are industrial strength
products featuring the exclusive Cooper Bussmann dual-element
construction. This spring loaded design provides superior short-circuit and
overload protection. The T or S fuses have more time-delay than the
medium-duty fuses in order to better protect motors and critical residential
circuits. Plug fuses are rated for a maximum of 125Vac. TL and SL four
pack (PK4) versions priced per box.
Plug fuses are often used in residential and industrial branch circuit and
motor protection. Fuses are used to protect furnace blower motors, pumps,
power tools, garage door openers, etc. Motor protection fuses are usually
used in conjunction with branch circuit protection. The fuse is often located
in a box cover unit. Plug fuses provide a compact and inexpensive method
to prevent damage to electrical motors. They help reduce downtime and
lower maintenance costs by opening the circuit when a dangerous overload
is present. When used for residential branch circuit protection, fuses are
typically located in the main fuse panel.
Edison Base Plug Fuses
The base is the same as a light bulb base. All sizes fit the same fuse
receptacle.
Type T 125Vac Dual-Element, Time-Delay, Edison Base Plug Fuses
Heavy-Duty Type T fuses for critical circuit protection. Used for air
conditioners, furnace blower motors, swimming pool pumps, deep freezers
or any circuit where motors frequently turn on and off. Use for all
commercial applications. The Type T plug fuse is an industrial strength
product. It provides superior protection, yet will not open under repeated
motor startups. Available in a wide amp range to permit exact sizing for
motor protection.
Part No. Blister
(Amps)* Pack
T-1
1
/
4
T-1
6
/
10
T-3
2
/
10
T-4
T-5
T-6
1
/
4
T-8
T-10
T-12
T-15
T-20
T-25
T-30
Poly
Bag
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*See Price Sheet for all available ratings.
Type TL 125Vac Time-Delay Edison Base Plug Fuses
Medium-Duty Type TL fuses for residential motor circuits in kitchens, work-
shops, garages, utility rooms or any circuit with motors, relays or solenoids.
Part No.
(Amps)
TL-15
TL-20
TL-25
TL-30
Four
Pack
X
X
X
X
Blister
Pack
X
X
X
X
MB 125Vac Edison Base Circuit Breakers
For replacing Edison base plug fuses in residential fuse panels.
Part No.
(Amps)
BP/MB-15
BP/MB-20
Poly
Bag
X
X
42
For product information and Data Sheets, visit
www.cooperbussmann.com
Consumer Aftermarket Catalog
Plug Fuses, Adapters & Circuit Breakers
CSA Edison Base Plug Fuses
The base is the same as a light bulb base.
All sizes fit the same fuse receptacle.
Rejection Base Plug Fuses
The rejection base threads prevent a larger amp fuse from being used.
A 30 amp fuse cannot be installed in a 20 amp receptacle because of the
different sized threads. Available in medium- and heavy-duty.
Part No. Blister
(Amps)* Pack
Poly
Bag
X
X
Type S 125Vac Dual-Element, Time-Delay,
Rejection Base Plug Fuses
Heavy-Duty Type S fuses for critical circuit
protection. Used for air conditioners, furnace
blower motors, swimming pool pumps, deep
freezers or any circuit where motors
frequently turn on and off. Used for all
commercial applications, the Type S rejection
base plug fuse is an industrial strength
product. It provides superior protection, yet
will not open
under repeated
motor startups.
Available in a wide
amp range to per-
mit exact sizing for
motor protection.
TC 125Vac Dual-Element Time-Delay
Type D CSA Edison Base Plug Fuses
TC fuses for residential motor circuits in kitchens, workshops, garages,
utility rooms or any circuit with motors, relays or solenoids.
Part No.
(Amps)
TC-15
TC-20
TC-25
TC-30
Four
Pack
X
X
X
X
Blister
Pack
X
X
X
X
S-1
1
/
4
S-1
6
/
10
S-2
S-2
1
/
2
S-3
2
/
10
S-3
1
/
2
S-4
S-5
S-6
1
/
4
S-7
S-8
S-10
S-12
S-15
S-20
S-25
S-30
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*See Price Sheet for all available ratings.
SL 125Vac Time-Delay, Rejection Base Plug Fuses
SL fuses for residential motor circuits in kitchens, workshops, garages, utility
rooms or any circuit with motors, relays or solenoids.
P 125Vac Dual-Element One-Time
Type P CSA Edison Base Plug Fuses
P fuses for non-inductive loads such as lighting and heating circuits.
Part No.
(Amps)*
P-15
P-20
P-25
P-30
Four
Pack
X
X
X
X
Blister
Pack
X
X
X
X
Part No.
(Amps)
SL-15
SL-20
SL-25
SL-30
Four
Pack
X
X
X
X
Blister
Pack
X
X
X
X
SA Fustat Fuse Adapters for Using Type S and SL Rejection Plug Fuses
In Edison Base Fuse Sockets
The size-rejection SA inserts convert an Edison Base receptacle to accept
the Rejection Base S and SL fuses. Once installed, the SA adapter can not
easily be removed and limits the amp rating of the fuse that can be
installed. SA adapters are available in a wide variety of sizes to protect
motors and branch circuits. Use the chart to select the correct SA adapter.
Ideal for retrofitting Edison Base fuse panels in rental property to prevent
over-fusing and bring existing panels up to compliance with the NEC
®
.
Amp
Range
1 or less
1.25 or less
1.6 or less
3.5 to 6.25
7 to 15
20
20 to 30
Part No.*
SA-1
SA-1
1
/
4
SA-1
6
/
10
SA-6
1
/
4
SA-15
SA-20
SA-30
Blister
Pack
Poly
Bag
X
X
X
X
X
X
X
X
*See Price Sheet for all available ratings.
For product information and Data Sheets, visit
www.cooperbussmann.com
43
Consumer Aftermarket Catalog
Box Cover Units
For Supplemental Circuit and Small Motor Protection
Box cover units provide an efficient and economical method to protect
motors from damage due to overloads. In most cases, the branch circuit
protection in the main panel is not sufficient to protect small motors. For
example: a motor rated for 6
1
/
4
amps will likely burn up before a 30 amp
breaker will trip. The box cover unit permits a supplemental fuse to be
installed. The fuse can be sized close to the motor load so that it opens
when the motor draws current in excess of its amp rating, thus protecting
the motor from damage.
Box cover units are available in a variety of sizes that fit standard electrical
boxes. In addition to a fuse holder, many accessories make these units more
convenient. When a switch is used (SS Series) it turns the fused power to
the load on and off. The receptacle (SR Series) allows motors to be plugged
into the fused circuit. All box cover units are UL Listed for a maximum 15
amp fuse at 125Vac (except as noted).
SSU
SRU
Blister
Part No.* Pack Reload
SOU
SRU
SSN
SSU
SSY
STY**
X
X
X
X
Poly
Bag
3
Maximum
Hp / Volts / Amps
/
4
Hp / 125Vac / 15A
/
2
Hp / 125Vac / 15A
1
/
2
Hp / 125Vac / 15A
1
/
2
Hp / 125Vac / 15A
1
/
2
Hp / 125Vac / 15A
1
/
2
Hp / 125Vac / 15A
1
Box
Type
2
1
/
4
” Handy
2
1
/
4
” Handy
Single Gang
2
1
/
4
” Handy
4” Square
4” Square
Description
Fuse Holder Only
Fuse Holder Plus Receptacle
Weatherproof Fuse Holder and Switch
Fuse Holder Plus Switch
Fuse Holder Plus Switch
Twin Fuses Plus Double Pole Switch
X
X
X
* See Price Sheet for all available versions.
** Double pole switch opens both sides of the circuit. Can be used for two separate motors with common switch or a single motor (
3
/
4
Hp, 250Vac max.)
SSN Weatherproof Model
SOU
SRU
SSU
SSY
STY
44
For product information and Data Sheets, visit
www.cooperbussmann.com
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