Catalog 1308242 Issued 3-03 (PDF Rev. 10-10) W28 series Push to Reset Fuseholder-Type Thermal P&B Circuit Breaker Note: VDE not available on 16A and 20A W28 only. Features • • • • • 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. 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. 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. Typical Resistance vs. Current Rating @ +25°C Current Rating in Amps 0.25 0.50 0.75 1.0 2.0 3.0 4.0 5.0 6.0 7.0 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. Electrical Data @ 25°C Calibration: Will continuously carry 100% of rating. 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. 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. Typical Resistance in Ohms 14.0 3.55 2.0 0.89 0.17 0.069 0.043 0.030 0.026 0.017 0.016 0.014 0.011 0.01 0.009 0.009 0.007 0.007 0.007 0.006 Ambient Compensation Chart 1.40 Overload 100% 135% 200% 400% 600% 800% 1000% 800 700 (A) (B) All 0.25-2 Amp Models Trip Times 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. 1.30 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. 500 1.00 0.90 0.80 –20 –10 0 10 20 30 40 50 60 Ambient Temperature In Degrees Centigrade (°C) 200 175 100 Dimensions are shown for 1.10 0.60 (B) 300 110 reference purposes only. 1.20 0.70 400 0 .1 Correction Factor (A) All 3-20 Amp Models 900 Load Current As A Percent Of Breaker Rating 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 20.0 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). 1000 135 Typical Resistance in Ohms Mechanical/Environmental Data Time vs. Current Trip Curve @ +25°C 600 Current Rating in Amps 1 10 Time In Seconds Dimensions are in inches over (millimeters) unless otherwise specified. 100 1000 Specifications and availability subject to change. 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. www.tycoelectronics.com Technical support: Refer to inside back cover. Catalog 1308242 Issued 3-03 (PDF Rev. 10-10) 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 – 1.574mm) thick panel. T = .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: 11 = Black with No Rate Marking 1 = Black with White 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) 6. Button Color: A = Black Consult factory for other bezel colors. B = Red Consult factory for other button colors. 7. Amp Rating: 0.25 0.75 1 0.50 2 3 4 5 6 7 8 9 10 11 12 13 14 16 20 Note: All standard part numbers in this series are RoHS compliant. Stock Items – Authorized distributors are more likely to stock the following items. W28-XQ1A-1 W28-XQ1A-2 W28-XQ1A-3 W28-XQ1A-0.25 W28-XQ1A-0.50 W28-XQ1A-0.75 W28-XQ1A-7 W28-XQ1A-8 W28-XQ1A-10 W28-XQ1A-4 W28-XQ1A-5 W28-XQ1A-6 Optional Protective Boot Outline Dimensions Push-to-Reset Type Clear Silicone Rubber Boot .19 (4.83) 1.535 MAX. (38.99) 23-019A .76 MAX. (19.31) A I .54 MAX. (13.716) A .76 MAX. (19.31) O .37 (9.4) W28-XT1A-10 W28-XT1A-12 W28-XQ1A-12 W28-XQ1A-15 W28-XQ1A-20 .325 MAX. (8.26) AMP RATING .350 (8.89) .525 (13.33) .750 (19.05) .625 MAX. (15.875) SECTION A-A .250 x .032 (6.35 x .813) QUICK CONNECT TERMINALS Optional Internal Tooth Push-On Lockwasher 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. For panels greater than .105 (2.67) thickness .970 DIA. (25.64) Recommended Panel Cutouts .570-.575 (14.478-14.605) 55-025B 55-025B INTERNAL TOOTH PUSH-ON LOCKWASHER For panels greater than .105” (2.67) thickness .540-.550 (13.716-13.970) Disclaimer .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) While Tyco Electronics has made every reasonable effort to ensure the accuracy of the information in this document, Tyco Electronics does not guarantee that it is error-free, nor does Tyco Electronics make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. Tyco Electronics reserves the right to make any adjustments to the information contained herein at any time without notice. Tyco Electronics 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 Tyco Electronics for the latest dimensions and design specifications. Dimensions are shown for reference purposes only. Dimensions are in inches over (millimeters) unless otherwise specified. Specifications and availability subject to change. www.tycoelectronics.com Technical support: 111 Refer to inside back cover.