55-025B TE Connectivity, 55-025B Datasheet
55-025B
Manufacturer Part Number
55-025B
Description
LOCK WASHER
Manufacturer
TE Connectivity
Series
W28r
Datasheet
1.55-025B.pdf
(2 pages)
Specifications of 55-025B
Accessory Type
Lockwasher
Outer Diameter
25.64mm
External Diameter
24.638mm
Features
Internal Tooth, Push-On
Rohs Compliant
Yes
For Use With
Thermal Circuit Breakers - W28 Series
110
Time vs. Current Trip Curve @ +25°C
Features
• Switchable version combines on-off switch and circuit protection in a
• Approved to many international standards (push to reset type).
• Replaces slow blow glass cartridge fuse.
• Labor-saving snap-in mounting.
• Button extends for visual trip indication on push to reset model.
• Rocker on switchable model moves to “overload” position upon trip.
Electrical Data @ 25°C
Calibration: Will continuously carry 100% of rating.
Dielectric Strength: Over 1,500 volts RMS.
Maximum Operating Voltages: 32VDC; 250VAC, 50/60 Hz.
Interrupt Capacity: 1,000 amps at 250VAC, 50/60 Hz. and 32VDC in
Dimensions are shown for
reference purposes only.
Agency Approvals
W28 series is UL 1077 Recognized as Supplementary Protectors, File
E69543, and CSA Certified as Appliance Component Protectors, File
LR15734. W28 breakers have been issued Certificate of Suitability
CS2190N as supplementary Equipment Protectors by the Energy
Authority of New South Wales, Australia. W28 breakers are also
DEMKO (Denmark) and SEV (Switzerland) approved. VDE approved
for use in office equipment and provides 8mm isolation. 16 amp and
20 amp models do not have VDE, DEMKO and SEV approvals at
present. W28-S is UL 1077 Recognized, and CSA Certified for models
up to and including 15 amps.
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.
single unit.
(Consult factory for availability)
1000
Switch/Breaker
900
800
700
600
500
400
300
200
100
175
135
0
.1
3-20 amp models – may trip between 101% and 134%, but
must trip at 135% of rating within one hour at +25°C.
0.25-2 amp models – may trip between 101% and 174%, but
must trip at 175% of rating within one hour at +25°C.
(A)
accordance with UL standard 1077 .
1
Dimensions are in inches over
(millimeters) unless otherwise
specified.
Push-to-Reset Breaker
Time In Seconds
10
(A) All 3-20 Amp Models
(B)
Overload
1000%
100%
135%
200%
400%
600%
800%
Issued 3-03 (PDF Rev. 4-04)
0.17-0.45 Sec.
Trip in 1 hour
2.2-15.0 Sec.
0.55-1.8 Sec.
0.27-0.7 Sec.
0.12-0.3 Sec.
Trip Times
Catalog 1308242
No Trip
100
(B) All 0.25-2 Amp Models
Overload
100%
175%
200%
400%
600%
Typical Resistance vs. Current Rating @ +25°C
Specifications and availability
subject to change.
Resettable Overload Capacity: Six times rated current for 0.25 through 2
Reset Time: 180 seconds max. for 0.25 through 2 amp models. 10 to 60
Mechanical/Environmental Data
Endurance Cycling(switchable type): Typically 30,000 operations at
Termination: .250” (6.35mm) quick connects. Soldering to terminals is
Mounting: Snaps into panel from front. See Recommended Panel Cutouts.
Approximate Weight: 0.35 oz. (10g).
W28
Switchable or
Push to Reset
Fuseholder-Type
Thermal Circuit Breaker
Note: VDE, Demko, Semko not available on 16A and 20A W28 only.
in Amps
Current
Trip in 1 hour
4.5-28.0 Sec.
Rating
1.0-6.5 Sec.
0.4-4.0 Sec.
Trip Times
0.25
0.50
0.75
1.0
2.0
3.0
4.0
5.0
6.0
7 .0
No Trip
seconds for 3 through 20 amp models.
series
not recommended.
1000
Resistance
in Ohms
Typical
To use this chart: Read up from the ambient
temperature to the curve, and across to find a
correction factor. Multiply 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 Compensation Chart
14.0
3.55
2.0
0.89
0.17
0.069
0.043
0.030
0.026
0.017
1.40
1.30
1.20
1.10
1.00
0.90
0.80
0.70
0.60
Ambient Temperature In Degrees Centigrade (°C)
amp models. Ten times rated current for
3 through 20 amp models.
–20 –10 0
100% of rating.
in Amps
Current
Rating
12.0
13.0
14.0
15.0
16.0
20.0
10.0
11.0
8.0
9.0
10 20 30 40 50 60
www.tycoelectronics.com
Technical support:
Refer to inside back cover.
Resistance
in Ohms
Typical
0.016
0.014
0.011
0.01
0.009
0.009
0.007
0.007
0.007
0.006
P&B
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55-025B Summary of contents
Page 1
... Overload Trip Times 100% No Trip 100% 135% Trip in 1 hour 175% Trip in 1 hour 200% 2.2-15.0 Sec. 200% 4.5-28.0 Sec. 400% 0.55-1.8 Sec. 400% 1.0-6.5 Sec. 600% 0.27-0.7 Sec. 600% 0.4-4.0 Sec. 800% 0.17-0.45 Sec. 1000% 0.12-0.3 Sec. (B) 10 100 Time In Seconds ...
Page 2
... Q = .250” (6.35mm) Quick Connect will mount in .032”-.062” (.813mm – 1.574mm) thick panel .250” (6.35mm) Quick Connect will mount in .075”-.105” (1.905mm – 2.667mm) thick panel. For panel thicknesses other than above, order “Q” type and 55-025B Internal Tooth Push-On Lockwasher. 5. Bezel Color Black with White Rate Marking † ...