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.
Time vs. Current Trip Curve @ +25°C
Ambient Compensation Table
Overload Trip Times
100%
135%
200%
300%
400%
500%
600%
No Trip
Trip in 1 hour
5.0 - 40.0 Sec.
1.8 - 7.6 Sec.
1.0 - 4.5 Sec.
0.6 - 3.0 Sec.
0.4 - 2.2 Sec.
.1 1 10 100 1000
Time In Seconds
1000
900
800
700
600
500
400
300
200
100
0
Load Current As A Percent
Of Breaker Rating
10,000
135
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.
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.
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.
Typical Resistance vs. Current Rating @ +25°C
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).
Current Typical Current Typical
Rating Resistance Rating Resistance
in Amps in Ohms in Amps in Ohms
5.0 0.050 15.0 0.017
6.0 0.042 20.0 0.012
7.0 0.036 25.0 0.010
8.0 0.031 30.0 0.008
10.0 0.025 35.0 0.007
12.0 0.021 40.0 0.006
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Electronics
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
W54 Series Thermal Circuit Breakers
Economical, Push-to-Reset Only Thermal Circuit Breaker
Catalog 1309286
Issued 4-02
Ambient Rating
Temperature Correction
in °C Factor
10 .90
20 .98
25 1.00
30 1.10
40 1.25
50 1.61
60 2.00
.465
(11.8)
1.22
(31.0)
.846
(21.5)
SEE TERMINAL DRAWINGS
FOR DETAIL
1.378
(35.0)
.575
(14.6)
.638
(16.2)
SEE MOUNTING
BUSHING AND
MOUNTING HARDWARE
DRAWINGS FOR DETAIL
.303
(7.7)
.102
(2.6)
.031
(.8)
.118 DIA
(3.0)
Outline Dimensions
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
We recommend that our authorized distributors stock the following items for immediate delivery.
.854 DIA.
(21.7)
.945 DIA.
(24.0)
.016 (.4) THICK .016 (.4) THICK
.740 DIA.
(18.8)
.590 DIA.
(15.0)
.102
(2.6)
.551 DIA.
(14.0)
.079
(2.0)
.126
(3.2)
.740 DIA.
(18.8)
.126
(3.2)
2 X .059 DIA.
(1.5)
84¡56¡
.425
(10.8)
.496
(12.6)
.157
(4.0)
.394
(10.0)
.059
(1.5)
.346
(8.8)
.496
(12.6)
.059
(1.5)
.386
(9.8)
.496
(12.6)
.157
(4.0)
.386
(9.8)
.543±.005
(13.8±.13)
.630±.005
(16±.13)
.543±.005
(13.8±.13)
.630±.005
(16±.13)
.394+.008, -.0
(10.0+.2, -.0)
.441+.008, -.0
(11.2+.2, -.0)
.394+.008, -.0
(10.0+.2, -.0)
.441+.008, -.0
(11.2+.2, -.0)
.382 +.008, -.0
(9.7 +.2, -.0)
.346 +.008, -.0
(8.8 +.2, -.0)
.433 +.008, -.0
(11.0 +.2, -.0)
.480 +.008, -.0
(12.2 +.2, -.0)
Termination Options Optional Nameplates
Special Order – M11 X 1.0 Thread Standard Option 2 – 3/8” - 24UNF Thread
Special Order – Snap In Option II Standard Option 1 – M11 X 1.0 Thread Special Order – M12 X 1.0 Thread
Special Order – Snap In Option I
.181
(4.6) .181
(4.6)
.098 ± .01
(2.5 ± 0.3)
Standard
.250 QC
Straight
Special
.250 QC
45°
Standard
.250 QC
90°
Special
.250 QC
270°
Special
#8-32 Screw
45°
Standard
#8-32 Screw
90°
Mounting Hardware Options
Standard
Knurled Nut
Standard
Hex Nut
Special
Integrated
Knurled Nut
Special
Integrated Knurled Nut
with Small Holes
Special
Embossed
Aluminum
Special
Silver Printing
On Black
2
Electronics
W54 Series Thermal Circuit Breakers
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
Catalog 1309286
Issued 4-02
Ordering Information
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.
Typical Part No. BW54-XB1A4A10-5
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 7 = 3/8” (one side flat) x 10mm) long, plastic
2 = 3/8” (one side flat) x 10mm) long, metal
6. Terminals:
A = Quick connect .250” (6.35mm) straight C = #8-32 screw 90°(screws installed)
B = Quick connect .250” (6.35mm) bent 90°
7. Mounting Hardware:
4 = Metal knurled nut/hex nut 5 = Plastic knurled nut 12 = Metal knurled nut 99 = None
8. Mounting Hardware Packaging:
A = Assembled to bushing B = Bulk unassembled C = No mounting hardware
9. Maximum AC Operating Voltage:
1 = 250VAC
10. Nameplate:
0 = None
11. Specify Amp Rating:
5 7 10 15 25 35*
6 8 12 20 30 40* *Not UL or CSA
