112
Catalog 1308242
Issued 3-03 (PDF Rev. 08-13)
Revised 04-17
www.te.com
Dimensions are in inches over
(millimeters) unless otherwise
specified.
Dimensions are shown for reference
purposes only. Specifications and
availability subject to change.
South America: 55-11-2103-6000
Hong Kong: 852-2735-1628
Japan: 81-44-844-8013
UK: 44-8706-080208
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-1106-0803
Potter & Brumeld
Time vs. Current Trip Curve @ +25°C
Overload Trip Times
100%
135%
200%
300%
400%
500%
600%
No Trip
Trip in 1 hour
4.0 - 40.0 Sec.
1.2 - 12.0 Sec.
0.6 - 5.0 Sec.
0.4 - 2.8 Sec.
0.3 - 1.8 Sec.
.1
1
10
100
1000
Time In Seconds
900
800
700
600
500
400
300
200
100
0
Load Current As A Percent
Of Breaker Rating
10,000
135
Features
• Compact, trip-free, rocker-actuated design.
• 5 to 20 amp ratings.
• Provides circuit protection and power switching in a single unit.
• Available with optional indicator lamp.
• Snaps into the same cutout as many common power switches.
• Various color, marking 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. * 150% for 5-8A models
Dielectric Strength: 1,500VAC (60 seconds).
Insulation Resistance: 100 megohms.
Maximum Operating Voltages: 50VDC; 125 or 250VAC, 50/60 Hz. (model
dependent).
Mechanical/Environmental Data
Operating Temperature Range: 0°C to +60°C for 10-20A models
0°C to +50°C for 5-8A models
Termination: .250” (6.35mm) quick connects, solder terminals or right angle PC
terminals.
Mounting: Snaps into 1.122 x .531 (28.5 x 13.5) panel cutout.
Approximate Weight: 0.37 oz. (10.5g).
Current Typical Current Typical
Rating Resistance Rating Resistance
in Amps in Ohms in Amps in Ohms
5.0 0.050 10.0 0.025
6.0 0.042 15.0 0.017
7.0 0.036 20.0 0.0125
8.0 0.031
1.122
(28.5)
.531
(13.5)
SUGGESTED
PANEL CUTOUT
Recommended Panel Cutout
Panel Thickness
W51 series circuit breakers accommodate panel thicknesses
from 0.030 in. to 0.118 in. (0.75 mm - 3.0 mm).
Agency Approvals
W51 series is UL 1077 Recognized as Supplementary Protectors,
File E69543, for Canada and the United States. Approved to VDE
0642/EN60934 (Circuit Breakers for Equipment) License Number
40017023 (for AC loads only). CCC mark compliant, certificate
2004010307123223.
Users should thoroughly review the technical data before selecting a product part
number. It is recommended that users also seek out the pertinent approvals files
of the agencies/laboratories and review them to ensure the product meets the
requirements for a given application.
Outline Dimensions
W51 series
Rocker-Actuated
Thermal Circuit Breaker/Power Switch
With Optional Indicator Lamp
Interrupt Capacity: 1,000 amps in accordance with UL standard 1077.
Resettable Overload Capacity: Ten times rated current.
Switch Endurance Cycling: Typically 6,000 operations at 100% of rating.
Reset Time: 60 seconds.
Typical Resistance vs. Current Rating @ +25°C
Ambient Compensation Table
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.
Ambient Rating Correction Factor
Temperature
in °C 5-8A Models 10-20A Models
10 .80 .80
20 .90 .90
25 1.00 1.00
30 1.10 1.05
40 1.25 1.15
50 1.61 1.25
60 1.40
