1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNovember 30, 20071SUBJECT 275AOUTLINE OF INVESTIGATIONFORAUTOMOTIVE BLADE TYPE FUSESIssue No: 4November 30, 2007Summary of TopicsThis fourth issue of the Subject 275A Outline of Investigation for
2、Automotive Blade Type Fuses includes revisions to eliminate cottonindicator as a criteria for all but the Interrupting Capacity Test.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements contained in thisStandard, the curre
3、nt version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2007 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 30, 2007SUBJECT 275A2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZE
4、D FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Units of Measurement .53 Components 54 Undated References 55 Application of Requirements 6PART I ALL FUSESCONSTRUCTION6 Materials .6PERFORMANCE7 General 68 Carrying Capacity Test 78.1 General .78.2 Ac
5、ceptance criteria .79 Overload Test 79.1 General .79.2 Acceptance criteria .710 Current Cycling Test .810.1 General 810.2 Acceptance criteria 811 Accelerated Aging .812 Interrupting Capacity Test .912.1 General 912.2 Acceptance criteria 9MARKING13 General .9PART II TYPE J1284 FUSESGENERAL14 Characte
6、ristics .1015 Dimensions 10PERFORMANCE16 Carrying Capacity Test 1217 Overload Test 1218 Current Cycling Test 12NOVEMBER 30, 2007 SUBJECT 275A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARKING19 General 12PART III TYPE J2077 FUSESGENERAL
7、20 Characteristics .1321 Dimension .13PERFORMANCE22 Carrying Capacity Test 1523 Overload Test 1524 Current Cycling Test 15MARKING25 General 15PART IV TYPE J1888 FUSESGENERAL26 Characteristics .1627 Dimensions 16PERFORMANCE28 Carrying Capacity Test 1829 Overload Test 1830 Current Cycling Test 18MARKI
8、NG31 General 18NOVEMBER 30, 2007SUBJECT 275A4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover blade type fuses intended for the protection of automotive wire andautomotive apparatus.1.2 They are n
9、ot intended for use in circuits rated over 32 VDC.2 Units of Measurement2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3 Components3.1 Except as indicated in 3.2, a component of a value covered by this outline shall comply w
10、ith therequirements for that component.3.2 A component need not comply with a specific requirement that:a) Involves a feature or characteristic not needed in the application of the component in thevalue covered by this outline, orb) Is superseded by a requirement in this outline.3.3 A component shal
11、l be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceedin
12、g specified limits, and shall be used only under those specific conditions.4 Undated References4.1 Any undated reference to code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.NOVEMBER 30, 2007 SUBJECT 275A 5U
13、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5 Application of Requirements5.1 The blade type fuses covered by this Outline are categorized by dimensions, interrupting rating andelectrical characteristics. Accordingly, this Outline is compris
14、ed of four parts:Part I Applies to all blade type automotive fuses covered by this OutlinePart II Applies to all SAE J1284 style fusesPart III Applies to all SAE J2077 style fusesPart IV Applies to all SAE J1888 style fusesPART I ALL FUSESCONSTRUCTION6 Materials6.1 The fuses shall have transparent n
15、on-conductive bodies capable of withstanding the vehicleenvironmental conditions described in the corresponding performance sections of this Outline.6.2 The terminals shall be of non-ferrous materials and shall be plated with nickel, cadmium or othermaterial having equivalent electrical and corrosio
16、n protection properties6.3 The fuse elements shall be clearly visible through the non-conductive body.PERFORMANCE7 General7.1 The following tests shall be conducted at an ambient temperature between 19 29C (66.2 84.2F),unless otherwise indicated, with the fuses in the horizontal position.7.2 A minim
17、um of five fuses, 10 fuses for the short circuit test, at each current rating shall be subjectedto the following tests.7.3 Fuses shall be mounted horizontally in a suitable fuseholder as appropriate for the type of fuse:a) The test fixture as described in SAE Standard J1284, Blade Type Automotive Fu
18、ses.b) The test fixture as described in SAE Standard J2077, “Miniature Blade Type ElectricalFuses”.c) The test fixture as described in SAE Standard J1888, “High Current Time Lag ElectricFuses”.NOVEMBER 30, 2007SUBJECT 275A6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTIO
19、N WITHOUT PERMISSION FROM UL8 Carrying Capacity Test8.1 General8.1.1 The fuses shall continuously carry the value of current specified in the Sections 16, 22 and 28, asappropriate for the fuse type.8.1.2 It is assumed that a fuse will carry the current continuously when it has carried the current lo
20、ngenough to produce constant temperatures.8.1.3 The temperature is to be considered constant when three successive readings taken at intervals ofnot less than 10 minutes apart indicate no rise in temperature.8.2 Acceptance criteria8.2.1 The fuse shall not open.8.2.2 The fuse shall remain intact.8.2.
21、3 There shall be no deformation of the fuse body.8.2.4 The fuse markings shall remain legible.9 Overload Test9.1 General9.1.1 The fuses shall operate according to the performance limits specified in Sections 17, 23 and 29, asappropriate for the fuse type.9.2 Acceptance criteria9.2.1 There shall be n
22、o re-establishment of current (restrike).9.2.2 The fuse shall not emit molten metal.9.2.3 The fuse shall remain intact.9.2.4 There shall be no deformation of the fuse body.9.2.5 The fuse markings shall remain legible.NOVEMBER 30, 2007 SUBJECT 275A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
23、REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Current Cycling Test10.1 General10.1.1 Fuses shall be subjected to a 250,000-cycle load test.10.1.2 The test voltage shall be any convenient voltage, up to and including 32 VDC10.1.3 The test current shall be as specified in the Sections 18, 2
24、4 and 30, as appropriate for the fusetype.10.1.4 Cycling is to consist of 3 cycles per minute at a 50 percent duty cycle.10.2 Acceptance criteria10.2.1 The fuse shall not open.10.2.2 The fuse shall remain intact.10.2.3 There shall be no deformation of the fuse body.10.2.4 The fuse markings shall rem
25、ain legible.10.2.5 Following the cycling, the fuses are to be subjected to the Carrying Capacity Test, Section 8, andOverload Test, Section 9.11 Accelerated Aging11.1 The fuses shall be subjected to 15 cycles unenergized as follows:a) 16 hours at 95-99 percent relative humidity and 37 1C (98.6 2F)b)
26、 2 hours at -40 1C (-40 2F)c) 2 hours at 70 1C (158 2F)d) 4 hours at room ambient11.2 The fuses shall be placed in a tray with the blades down. Samples shall remain in the humiditychamber when testing cannot be completed in a 24-hour period.11.3 Following the cycling, the fuses are to be subjected t
27、o the Carrying Capacity Test, Section 8 andOverload Test, Section 9.NOVEMBER 30, 2007SUBJECT 275A8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Interrupting Capacity Test12.1 General12.1.1 The fuse shall be capable of interrupting 1000 +5
28、% / -0% amperes at 32 +5% / -0% volts DC withcotton surrounding the fuse. The time constant of the test circuit shall not be less than 2.5 ms.12.2 Acceptance criteria12.2.1 There shall be no re-establishment of current (restrike).12.2.2 The fuse shall not emit molten metal.12.2.3 The cotton indicato
29、r shall not ignite.12.2.4 The fuse shall remain intact.12.2.5 There shall be no deformation of the fuse body.12.2.6 The fuse markings shall remain legible.MARKING13 General13.1 The information on a fuse shall be legible and shall include the following:a) The manufacturers name, trademark or both,b)
30、The fuse current rating in amperesc) The fuse voltage rating in volts.13.2 If a manufacturer produces fuses at more than one factory, each fuse shall have a distinctivemarking to indicate the factory of manufacture.NOVEMBER 30, 2007 SUBJECT 275A 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE
31、PRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPART II TYPE J1284 FUSESGENERAL14 Characteristics14.1 The voltage rating shall be 32 VDC14.2 The current rating shall be 30 amperes or less. Preferred ratings are shown in Table 19.1.15 Dimensions15.1 Fuse dimensions shall be as specified in Figure
32、 15.1.This is generated text for figtxt.NOVEMBER 30, 2007SUBJECT 275A10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 15.1Dimensions of type J1284 fuseDrawing Reference Dimension mm (in.)Minimum MaximumA 18.97 (0.75) 19.30 (0.76)B 4.99
33、 (0.20) 5.25 (0.21)C 12.54 (0.49)D 6.17 (0.24) 6.67 (0.26)E 18.41 (0.72) 19.05 (0.75)F 3.59 (0.14) 3.80 (0.15)G 3.90 (0.15) 4.13 (0.16)H 14.35 (0.56) 14.61 (0.58)J 0.61 (0.02) 0.69 (0.03)NOVEMBER 30, 2007 SUBJECT 275A 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION W
34、ITHOUT PERMISSION FROM ULPERFORMANCE16 Carrying Capacity Test16.1 The fuses shall carry 110 percent of rated current continuously.17 Overload Test17.1 The fuses shall open in less than 30 minutes when carrying 135 percent of rated current.17.2 The fuses shall open in less than 5 seconds when carryin
35、g 200 percent of rated current.18 Current Cycling Test18.1 Using a resistive load, current is to be maintained at 70 percent of the fuse rating.MARKING19 General19.1 In addition to the requirements of Section 13, General, fuses may be color-coded. Note that theelement shall remain clearly visible th
36、rough the nonconductive body. If color-coded, the coding shall beas indicated in Table 19.1.Table 19.1Preferred ampere ratings and fuse color codeAmpere rating Color3 Violet4 Pink5 Tan7-1/2 Brown10 Red15 Light-blue20 Yellow25 Natural (white)30 Light-greenNOVEMBER 30, 2007SUBJECT 275A12UL COPYRIGHTED
37、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPART III TYPE J2077 FUSESGENERAL20 Characteristics20.1 The voltage rating shall be 32 VDC20.2 The current rating shall be 30 amperes or less. Preferred ratings are shown in Table 25.1.21 Dimension21.1 Fuse dim
38、ensions shall be as specified in Figure 21.1.This is generated text for figtxt.NOVEMBER 30, 2007 SUBJECT 275A 13UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 21.1Dimensions of the type J2077 fuseDrawing reference Dimension mm (in.)Min
39、imum MaximumA 4.00 (0.16)B 11.20 (0.44)C 9.00 (0.35)D 7.00 (0.28) 8.00 (0.31)E 10.60 (0.42) 11.20 (0.44)F 2.60 (0.10) 3.00 (0.12)G 0.78 (0.03) 0.88 (0.03)NOVEMBER 30, 2007SUBJECT 275A14UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANC
40、E22 Carrying Capacity Test22.1 The fuses shall carry 110 percent of rated current continuously.23 Overload Test23.1 The fuses shall open under overload in accordance with Table 23.1.Table 23.1Overload clearing timesPercent overload Maximum clearing time135 30 min.200 5.0 sec.350 0.50 sec.600 0.10 se
41、c.24 Current Cycling Test24.1 Using a resistive load, current is to be maintained at 70 2 percent of the fuse rating.MARKING25 General25.1 In addition to the requirements of Section 13, General, fuses shall be color-coded. Note that theelement shall remain clearly visible through the nonconductive b
42、ody. The coding shall be as indicated inTable 25.1.Table 25.1Preferred ampere ratings and fuse color codeAmpere rating Color2 Grey3 Violet4 Pink5 Tan7-1/2 Brown10 Red15 Blue20 Yellow25 Natural (white)30 GreenNOVEMBER 30, 2007 SUBJECT 275A 15UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
43、TION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPART IV TYPE J1888 FUSESGENERAL26 Characteristics26.1 The voltage rating shall be 32 VDC26.2 The current rating shall be 120 amperes or less. Preferred ratings are shown in Table 31.1.27 Dimensions27.1 Fuse dimensions shall be as specified in Figure 27.1
44、.This is generated text for figtxt.NOVEMBER 30, 2007SUBJECT 275A16UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 27.1Dimensions of type J1888 fuseDrawing reference Dimension mm (in.)Minimum MaximumA 8.6 (0.34) 9.2 (0.36)B 28.9 (1.14) 2
45、9.5 (1.16)C 21.3 (0.84) 21.9 (0.86)D 12.3 (0.48) 13.1 (0.52)E 28.9 (1.14) 29.5 (1.16)F 7.8 (0.31) 8.2 (0.32)G 0.78 (0.03) 0.86 (0.03)NOVEMBER 30, 2007 SUBJECT 275A 17UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCE28 Carrying Capaci
46、ty Test28.1 The fuses shall carry 100 percent of rated current continuously.29 Overload Test29.1 The fuses shall open under overload in accordance with Table 29.1.Table 29.1Overload clearing timesFuse rating Maximum clearing time at percent of rated current(amperes) 135 (Min.) 200 (Sec.) 350 (Sec.)
47、600 (Sec.)20 30 20 2 130 30 30 4 140 30 40 5 150 30 50 6 160 30 60 7 170 60 60 2 0.1580 60 60 2 0.15100 60 60 2 0.15120 60 60 2 0.1530 Current Cycling Test30.1 Using a resistive load, current is to be maintained at 70 2 percent of the fuse rating.MARKING31 General31.1 In addition to the requirements
48、 of Section 13, General, fuses shall be color-coded. Note that theelement shall remain clearly visible through the nonconductive body. The coding shall be as indicated inTable 31.1.NOVEMBER 30, 2007SUBJECT 275A18UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT P
49、ERMISSION FROM ULTable 31.1Preferred ampere ratings and fuse color codeAmpere rating Color20 Yellow30 Green40 Amber50 Red60 Blue70 Tan80 Natural100 Violet120 PinkNOVEMBER 30, 2007 SUBJECT 275A 19UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 30, 2007SUBJECT 275A20No Text on This Page
