110 w28 series push to reset fuseholder-type thermal p & b circuit breaker note: vde not available on 16a and 20a w28 only. time vs. current trip curve @ +25c ambient compensation chart (a) (b) (a) all 3-20 amp models (b) all 0.25-2 amp models overload trip times 100% 135% 200% 400% 600% 800% 1000% no trip trip in 1 hour 2.2-15.0 sec. 0.55-1.8 sec. 0.27-0.7 sec. 0.17-0.45 sec. 0.12-0.3 sec. overload trip times 100% 175% 200% 400% 600% no trip trip in 1 hour 4.5-28.0 sec. 1.0-6.5 sec. 0.4-4.0 sec. 1000 900 800 700 600 500 400 300 200 100 0 .1 11 0 100 1000 load current as a percent of breaker rating time in seconds 175 135 C2 0C 10 01 02 03 04 05 06 0 1. 40 1. 30 1. 20 1. 10 1. 00 0. 90 0. 80 0. 70 0. 60 co rre ct i on fac to r am bi en t te mp er at ur e i n de gr ees ce nt i g ra de ( c ) to use this chart: read up from the ambient tem - perature to the curve, and across to find a correction factor. multiply the breaker rating by the correc - tion 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 ? push to reset. ? approved to many international standards. ? replaces slow blow glass cartridge fuse. ? labor-saving snap-in mounting. ? button extends for visual trip indication. electrical data @ 25c calibration: will continuously carry 100% of rating. 3-20 amp models C may trip between 101% and 134%, but must trip at 135% of rating within one hour at +25c. 0.25-2 amp models C may trip between 101% and 174%, but must trip at 175% of rating within one hour at +25c. 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 accordance with ul standard 1077. mechanical/environmental data termination: .250 (6.35mm) quick connects. soldering to terminals is not?recommended. mounting: snaps into panel from front. see recommended panel?cutouts. approximate weight: 0.35 oz. (10g). resettable overload capacity: six times rated current for 0.25 through 2 amp models. ten times rated current for 3 through 20 amp models. reset time: 180 seconds max. for 0.25 through 2 amp models. 5 to 30 seconds for 3 through 20 amp models. current typical current typical rating resistance rating resistance in amps in ohms in amps in ohms 0.25 14.0 8.0 0.016 0.50 3.55 9.0 0.014 0.75 2.0 10.0 0.011 1.0 0.89 11.0 0.01 2.0 0.17 12.0 0.009 3.0 0.069 13.0 0.009 4.0 0.043 14.0 0.007 5.0 0.030 15.0 0.007 6.0 0.026 16.0 0.007 7.0 0.017 20.0 0.006 agency approvals w28 series is ul 1077 recognized as supplementary protectors, file e69543, and csa accepted as supplementary protectors (appliance component protectors), file lr15734. w28 breakers are vde approved for use in office equipment (ac loads only) and provides 8mm isolation. 16 amp and 20 amp models do not have vde approvals at present. ccc mark compliant, certificate 2004010307135992. 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 confirm the product meets the requirements for a given application. typical resistance vs. current rating @ +25c catalog 1308242 issued 3-03 (pdf rev. 11-15) revised 11-15 www.te.com dimensions are in inches over (millimeters) unless otherwise specified. dimensions are shown for reference purposes only. specifications and avail - ability 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 & brumfeld
111 recommended panel cutouts w28-xq1a-0.25 w28-xq1a-0.50 w28-xq1a-0.75 w28-xq1a-1 w28-xq1a-2 w28-xq1a-3 w28-xq1a-4 w28-xq1a-5 w28-xq1a-6 w28-xq1a-7 w28-xq1a-8 w28-xq1a-10 w28-xq1a-12 w28-xq1a-15 W28-XQ1A-20 w28-xt1a-10 w28-xt1a-12 outline dimensions . 250 x . 032 ( 6. 35 x . 813) qu i ck co nne ct te rm i na ls . 625 ma x. ( 15. 875) . 37 ( 9. 4) . 325 ma x. ( 8. 26) . 54 ma x. ( 13. 716) 1. 535 ma x. ( 38. 99) . 19 ( 4. 83) . 76 ma x. ( 19. 31) . 76 ma x . ( 19. 31) am p rat i ng i o .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) .570-.575 (14.478-14.605) .540-.550 (13.716-13.970) .970 dia. (25.64) 55-025b internal tooth push-on lockwasher for panels greater than .105? (2.67) thickness push-to-reset type notes: 1. soldering to terminals is not recommended. 2. recommended panel thickness: style q: .032 - .062 (.813 mm - 1.574 mm) style t: .075 - .105 (1.905 mm - 2.667 mm) 3. internal tooth push-on washer available for panel thickness not covered above. part no. 55-025b. stock items C authorized distributors are more likely to stock the following items. ordering information typical part number > w 28 -x q 1 a -5 1. designator: w = circuit breaker 2. series number: 28 = single pole fuseholder type 3. circuit function: x = series trip, push-to-reset button 4. terminal type and mounting: q = .250 (6.35mm) quick connect will mount in .032-.062 (.813mm C 1.574mm) thick panel. t = .250 (6.35mm) quick connect will mount in .075-.105 (1.905mm C 2.667mm) thick panel. for panel thicknesses other than above, order q type and 55-025b internal tooth push-on lockwasher. 5. bezel color: 1 = black with white rate marking 11 = black with no rate marking 2 = red with black rate marking 21 = red with no rate marking b = black with white reset marked on bezel (no rate marking) consult factory for other bezel colors. 6. button color: a = black b = red consult factory for other button colors. 7. amp rating: 0.25 0.75 2 4 6 8 10 12 14 20 0.50 1 3 5 7 9 11 13 16 optional internal tooth push-on lockwasher for panels greater than .105 (2.67) thickness 55-025b disclaimer while te has made every reasonable effort to ensure the accuracy of the infor - mation in this document , te does not guarantee that it is error-free, nor does te make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. te reserves the right to make any adjustments to the information contained herein at any time without notice. te expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. the dimensions in this catalog are for reference purposes only and are subject to change without notice. specifications are subject to change without notice. consult te for the latest dimensions and design specifications. note: all standard part numbers in this series are rohs compliant. catalog 1308242 issued 3-03 (pdf rev. 11-15) revised 11-15 www.te.com dimensions are in inches over (millimeters) unless otherwise specified. dimensions are shown for reference purposes only. specifications and avail - ability 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 & brumfeld
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