Electronics
W54 Series Thermal Circuit Breakers
Economical, Push-to-Reset Only Thermal Circuit Breaker
Catalog 1309286
Issued 4-02
Agency Approvals
W54 series (except 35A and 40A models) is UL 1077 Recognized as
Supplementary Protectors, File E69543, for Canada and the United
States.
Users should thoroughly review the technical data before selecting a product part
number. It is recommended that users also sek out the pertinent approvals files of
the agencies/laboratories and review them to ensure the product meets the
requirements for a given application.
Features
• New, economical design.
• 5 to 40 amp ratings. (35A and 40A models will not be submitted for
UL/CSA).
• Cannot be manually tripped.
• Button extends for visual trip indication.
• Push button to reset breaker.
• Numerous mounting and termination options.
Typical Resistance vs. Current Rating @ +25° C
Current
Rating
in Amps
5.0
6.0
7
.0
8.0
10.0
12.0
Typical
Resistance
in Ohms
0.050
0.042
0.036
0.031
0.025
0.021
Current
Rating
in Amps
15.0
20.0
25.0
30.0
35.0
40.0
Typical
Resistance
in Ohms
0.017
0.012
0.010
0.008
0.007
0.006
Electrical Data @ 25°C
Calibration:
Will continuously carry 100% of rating.
May trip between 101% and 134%, but must trip at 135% of
rating within one hour at +25°C.
Dielectric Strength:
1,500VAC (60 seconds).
Insulation Resistance:
100 megohms.
Maximum Operating Voltages:
50VDC; 125 or 250VAC (model
dependent).
Interrupt Capacity:
1,000 amps in accordance with UL standard 1077
.
Resettable Overload Capacity:
Ten times rated current.
Reset Time:
60 seconds.
Mechanical/Environmental Data
Operating Temperature Range:
0°C to +60°C.
Termination:
.250” (6.35mm) quick connects or #8-32 screws.
Mounting:
Various options. See Ordering Infomation and drawings.
Approximate Weight:
0.9 oz. (25.0g).
Time vs. Current Trip Curve @ +25°C
1000
900
800
Load Current As A Percent
Of Breaker Rating
700
600
500
400
300
200
135
Outline Dimensions
Overload
Trip Times
100%
No Trip
135%
Trip in 1 hour
200%
5.0 - 40.0 Sec.
300%
1.8 - 7.6 Sec.
400%
1.0 - 4.5 Sec.
500%
0.6 - 3.0 Sec.
600%
0.4 - 2.2 Sec.
.118 DIA
(3.0)
.465
(11.8)
1.22
(31.0)
.638
(16.2)
1.378
(35.0)
.846
(21.5)
.303
(7.7)
SEE TERMINAL DRAWINGS
FOR DETAIL
.031 .102
(.8) (2.6)
.575
(14.6)
SEE MOUNTING
BUSHING AND
MOUNTING HARDWARE
DRAWINGS FOR DETAIL
100
0
.1
1
10
100
1000
10,000
Time In Seconds
Ambient Compensation Table
Ambient
Temperature
in °C
10
20
25
30
40
50
60
Rating
Correction
Factor
.90
.98
1.00
1.10
1.25
1.61
2.00
To use this chart:
Divide the breaker rating by the
correction factor to determine the compensated
rating. Calculate the overloads in terms of the
compensated rating to use the published trip curve.
Do not use these devices outside their specified
operating temperature ranges.
1
Dimensions are shown for reference
purposes only.
Dimensions are in inches over
(millimeters) unless otherwise
specified.
Specifications subject to change.
Technical support: 1-800-522-6752
http://relays.tycoelectronics.com
Electronics
W54 Series Thermal Circuit Breakers
Typical Part No.
Catalog 1309286
Issued 4-02
Ordering Information
B
W
54
-X
B
1
A
4
A
1
0
-5
1. Designator:
W = Circuit breaker
2. Series Number:
54 = Economical, Single Pole, Push-to-Reset, Thermal Model
3. Circuit Function:
X = Series Trip
4. Button:
A = White, plain, no rate marking
C = White with black rate marking (vertical)
B = White with red rate marking (vertical)
5. Mounting Bushing:
1 = 9.8mm x 12.6mm long, metal
2 = 3/8” (one side flat) x 10mm) long, metal
6. Terminals:
A = Quick connect .250” (6.35mm) straight
B = Quick connect .250” (6.35mm) bent 90°
7. Mounting Hardware:
4 = Metal knurled nut/hex nut
8. Mounting Hardware Packaging:
A = Assembled to bushing
9. Maximum AC Operating Voltage:
1 = 250VAC
10. Nameplate:
0 = None
11. Specify Amp Rating:
5
7
10
6
8
12
15
20
25
30
35*
40*
7 = 3/8” (one side flat) x 10mm) long, plastic
C = #8-32 screw 90° (screws installed)
5 = Plastic knurled nut
B = Bulk unassembled
12 = Metal knurled nut
99 = None
C = No mounting hardware
*Not UL or CSA
We recommend that our authorized distributors stock the following items for immediate delivery.
W54-XB1A4A10-5
W54-XB1A4A10-6
W54-XB1A4A10-7
W54-XB1A4A10-8
W54-XB1A4A10-10
W54-XB1A4A10-12
W54-XB1A4A10-15
W54-XB1A4A10-20
W54-XB1A4A10-25
W54-XB1A4A10-30
W54-XC4C12A10-5
W54-XC4C12A10-10
W54-XC4C12A10-15
W54-XC4C12A10-20
W54-XC4C12A10-25
W54-XC4C12A10-30
Mounting Bushings and Recommended Panel Cutouts
.630±.005
(16±.13)
.543±.005
(13.8±.13)
.496
(12.6)
.157
(4.0)
.386
(9.8)
.441+.008, -.0
(11.2+.2, -.0)
.394+.008, -.0
(10.0+.2, -.0)
.394
(10.0)
.059
(1.5)
.346
(8.8)
.346 +.008, -.0
(8.8 +.2, -.0)
.382 +.008, -.0
(9.7 +.2, -.0)
Special Order – Snap In Option I
.630±.005
(16±.13)
.543±.005
(13.8±.13)
Special Order – M11 X 1.0 Thread
.441+.008, -.0
(11.2+.2, -.0)
.386
(9.8)
.496
(12.6)
.394+.008, -.0
(10.0+.2, -.0)
Standard Option 2 – 3/8” - 24UNF Thread
.480 +.008, -.0
(12.2 +.2, -.0)
.425
(10.8)
.496
(12.6)
.433 +.008, -.0
(11.0 +.2, -.0)
.059
(1.5)
.157
(4.0)
Special Order – Snap In Option II
Standard Option 1 – M11 X 1.0 Thread
Special Order – M12 X 1.0 Thread
Termination Options
Optional Nameplates
.854 DIA.
(21.7)
.945 DIA.
(24.0)
.181
(4.6)
.098
±
.01
(2.5
±
0.3)
.181
(4.6)
Standard
.250 QC
Straight
Special
.250 QC
45°
Standard
.250 QC
90°
Special
.250 QC
270°
Special
Standard
#8-32 Screw #8-32 Screw
45°
90°
.016 (.4) THICK
.016 (.4) THICK
Mounting Hardware Options
.590 DIA.
(15.0)
.551 DIA.
(14.0)
.740 DIA.
(18.8)
2 X .059 DIA.
(1.5)
.102
(2.6)
.079
(2.0)
.126
(3.2)
84¡
56¡
.126
(3.2)
.740 DIA.
(18.8)
Special
Embossed
Aluminum
Special
Silver Printing
On Black
Standard
Knurled Nut
Standard
Hex Nut
2
Special
Integrated
Knurled Nut
Special
Integrated Knurled Nut
with Small Holes
ORDERING NOTE:
Many options illustrated here are not listed in the “Ordering Information”
chart above. Options denoted by “Special” or “Special Order” in their
descriptions are only offered on a special order basis. They are subject to
extended leadtimes and significant minimum order quantities. Your Tyco
Electronics sales engineer must consult with the factory before providing
price and availability information regarding items with these options.
Specifications and availability subject to change without notice.
1309286 – 5M – XXX – DSP – 4/02 Printed in U.S.A.
© 2002 by Tyco Electronics Corporation. All Rights Reserved.
P&B and TYCO are trademarks.
Tyco Electronics Corporation
Harrisburg, PA 17105
Special Edition for Assessment Centres
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