1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1990 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDAn American National StandardJ2077ISSUEDNOV90Issued 1990-11MINIA
4、TURE BLADE TYPE ELECTRICAL FUSESForewordThis Document has not changed other than to put it into the new SAE Technical Standards BoardFormat.1. ScopeThe fuses shown in Figure 1 are for use in motor vehicles, boats, and trailers to protect electricalwiring and equipment. This SAE Standard is for the c
5、onstruction shown and is not intended to restrict thedesign and use of other configurations and materials capable of meeting the vehicle requirements.2. References2.1 Applicable Publications2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J726Air Cleane
6、r Test CodeSAE J1034Engine Coolant ConcentrateEthylene-Glycol Type2.1.2 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM B 117Method of Salt Spray (Fog) Testing3. Definitions3.1 FuseA device designed to interrupt the electrical circuit when subjected
7、 to overcurrents. This action is to benonreversible, and the fuse is intended to be replaced after the circuit malfunction has been corrected.4. Part 1Design Parameters4.1 MaterialsThe fuses shall have nonconductive bodies capable of withstanding vehicle environmentalconditions as set forth in this
8、document. Terminals shall have a suitable finish which will assure corrosionprotection and satisfactory mechanical and electrical properties.4.2 ConstructionThe fuse shall consist of a terminal and element combination securely attached to anonconductive fuse body. Fuse terminals shall be exposed thr
9、ough the top portion of the fuse body to allow forinspection of the electrical continuity of the fuse while it is engaged in a fuseblock or fuseholder. Fuseelements shall be visible through the body. Typical overall dimensions are shown in Figure 1.SAE J2077 Issued NOV90-2-FIGURE 1OVERALL FUSE DIMEN
10、SIONS4.3 Marking (Initially and After Environmental Exposure)Fuses shall be marked on the fuse body with theamperage, voltage rating, and manufacturers name or trademark. In addition, the fuses shall be color codedas shown in Table 1. Markings shall be legible at the conclusion of all tests set fort
11、h in this document.SAE J2077 Issued NOV90-3-5. Part 2Performance Requirements5.1 Ampere RatingThis document covers ampere ratings up to and including 30 A. Preferred ampere ratingsare shown in Table 1. These ratings were determined at 24 C ambient temperature using a test procedure asdetailed in 6.1
12、 of this document. The specific ampere capacity of the fuses is a function of the particularelectrical system being utilized. To aid in determining the actual capacity change, several factors should beconsidered by the application engineer.5.1.1 WIREFigure 2B represents the approximate ampere capaci
13、ty change due to cable sizes other than 5 mm2.5.1.2 TEMPERATUREFigure 2A represents the approximate capacity change with respect to ambient temperature.The use of fuses in ambient temperature beyond the limits shown is not recommended.5.1.3 LOADINGIt is recommended that the fuses not be loaded above
14、 80% of their rerated ampere capacitybased on ambient temperatures and the use of cable sizes other than 5 mm2. In addition, it is furtherrecommended that actual performance be verified through testing experimentally in the vehicle.NOTEThe specific ampere capacity of a fuse is a function of the part
15、icular electrical system being utilized.To aid in determining the actual capacity change several factors should be considered by theapplication engineer. These factors include ambient temperature, wire size, insulating material, andconnecting clips.5.2 Voltage RatingFuses shall be capable of interru
16、pting at any voltage up to and including 32 V.5.3 Maximum Voltage DropThe maximum voltage drop (in millivolts) at rated current across the fuse only shallbe as shown in Table 2.5.4 PerformanceTests shall be conducted within a temperature range of 24 C 5, which is considered roomambient within this s
17、pecification.5.4.1 AMPERE RATING TESTSFuses shall carry 110% of rated current continuously for a minimum of 100 h; shallopen in not less than 0.75 s or more than 1800 s at 135% of rated current; shall open in not less than 0.15 sor more than 5 s at 200% of rated current; shall not open in less than
18、0.080 s or more than 0.50 s at 350% ofrated current, and shall open in not less than 0.03 s or more than 0.10 s at 600% of rated current.TABLE 1PREFERRED AMPERE RATINGS ANDFUSE COLOR CODEAmpere Rating Color2 Grey3 Violet4 Pink5Tan7-1/2 Brown10 Red15 Blue20 Yellow25 Natural (White)30 GreenSAE J2077 I
19、ssued NOV90-4-FIGURE 2AAMBIENT TEMPERATURE EFFECT ON AMPACITY (TYPICAL)SAE J2077 Issued NOV90-5-FIGURE 2BWIRE RERATING CURVE5.4.2 INTERRUPTING CAPACITY TESTThe fuses shall be capable of interrupting 1000 +5%/0% A at 32 +5%/0%V D.C. with any time constant up to 2.5 ms. After testing, there shall be n
20、o rupturing of the fuse body and nodamage to the standard test module or the fuse such as to prevent removal of the fuse.5.4.3 CURRENT CYCLING TESTFuses shall meet the requirements of 5.4.1 after current cycling for a minimum of250 000 cycles (cf.; 6.3).TABLE 2MAXIMUM VOLTAGE DROP OF FUSEAT RATED CU
21、RRENTFuse Rating (Amps) Max Voltage Drop (mV)2 2253 1754 1755 1757-1/2 15010 12515 12520 12525 0030 100SAE J2077 Issued NOV90-6-5.4.4 TRANSIENT CURRENT CYCLINGFuses shall meet the requirements of 5.4.1 after a minimum of 50 000 cyclesof transient current cycling (cf.; 6.4).5.5 VibrationFuses shall m
22、eet the requirements of 5.4.1 after undergoing 6 h of vibration conditioning (cf.; 6.5).5.6 Environmental ExposureFuses shall meet the requirements of 5.4.1 after sequential exposure to dust andaccelerated aging conditioning or thermal aging and salt fog conditioning.NOTEOne set of samples are to be
23、 used for the dust and accelerated aging conditioning tests and aseparate set of samples should be used for the thermal aging and salt spray conditioning tests (cf.;6.6).5.7 Fluid CompatibilityFuses shall meet the requirements of 5.4.1 after exposure to the specified test fluids asprovided in 6.7 (c
24、f.; 6.7).6. Part 3 Test Procedures6.1 ProcedureThe fuses with the exception noted in the vibration and accelerated aging tests, shall be mountedhorizontally. When testing two or more fuses in series, the fuses shall be mounted no less than 150 mm apartand with no less than 600 mm of interconnecting
25、cable, except as noted for the transient current cycling test.All electrical tests shall be made with 5.0 mm2copper cable and a standard test module (shown in Figure 3).The interface voltage drop (VCD VAB) of the fixture shall not exceed 30 mV. The total voltage drop (VEF)should not exceed 60 mV. Th
26、e voltage check shall be made using a solid copper dummy with silver platedterminals and with the dimensions as shown in Figure 4.FIGURE 3STANDARD TEST MODULESAE J2077 Issued NOV90-7-FIGURE 4TEST SLUG6.2 Voltage DropThe voltage drop (in millivolts) after 15 min at rated current across the fuse shall
27、 be measuredat the indicated points on the fuse terminals as shown in Figure 1.6.3 Current Cycling Tests6.3.1 Resistors should be employed as load(s) to adjust the current to 68 to 72% of the fuse rating as shown inFigure 5.6.3.2 The test system voltage can be any convenient voltage up to and includ
28、ing 32 V.6.4 Transient Current Cycling Test6.4.1 Simulated or lamp loads should be used to adjust the initial peak transient current to the percent of the fuserating as shown in Figure 6 and the initial steady state current 98 to 102% of the fuse rating.6.4.2 The test system voltage can be any conve
29、nient voltage up to and including 32 V.SAE J2077 Issued NOV90-8-FIGURE 5CURRENT CYCLING WAVEFORMFIGURE 6TRANSIENT CURRENT CYCLING WAVEFORM6.4.3 A minimum of 300 mm of interconnecting cable should be used between each standard test module.6.5 Vibration TestSuitably mounted samples shall be subject to
30、 a simple harmonic motion having an amplitudeof 0.75 mm (1.50 mm total excursion). The frequency shall be varied uniformly between the limits of 10 to55 Hz. The entire range of 10 to 55 to 10 Hz shall be traversed in approximately 1 min. The motion shall beapplied for a period of 2 h in each of thre
31、e mutually perpendicular planes (total 6 h). (Testing to be performedwithout current passing through fuse.)SAE J2077 Issued NOV90-9-6.6 Environmental Exposure:6.6.1 DUSTFuses shall be placed in a dust chamber, Figure 7, unmounted and lying on their side. The chambershall contain about 1 kg of coarse
32、 grade dust conforming to SAE J726a. The dust shall be agitated for 3 severy 20 min by compressed air. The air shall be free of oil and moisture, at a pressure of 5.6 kg/cm2 0.06entering through an orifice 1.5 mm 1 in diameter. The total exposure time to dust shall be 24 h. (Testing tobe performed w
33、ithout current passing through fuse.)FIGURE 7DUST CHAMBER (TYPICAL)6.6.2 ACCELERATED AGINGA total of 15 cycles as follows: (Testing to be performed without current passingthrough fuse.)16 h at 95 to 99% relative humidity and 37 C 12 h at 40 C 12 h at 70 C 14 h at room ambientNOTEFuses shall be place
34、d in the humidity chamber on a tray, Figure 8, with the blades down. Samplesshall remain in the humidity chamber when testing cannot be completed in a 24 h period, forexample, weekends. If more than one chamber is used, the transfer time between chambers shallbe 5 min or less.SAE J2077 Issued NOV90-
35、10-FIGURE 8TRAY (TYPICAL)6.6.3 THERMAL AGINGFuses shall be aged at 180 C for a total of 168 h. (Testing to be performed in the standardtest module without current passing through the fuse.)6.6.4 SALT FOGFuses shall be subjected to salt fog conditioning per ASTM B 117 for four continuous hours.(Testi
36、ng to be performed in the standard test module without current passing through the fuse.)6.7 Fluid CompatibilityOne set of fuses shall be immersed in one of each of the test fluids at a temperature of19 to 29 C for 5 to 10 s. After immersion all liquid shall be drained from the fuses and the fuses s
37、hall be heataged at 120 C for 24 h. The test fluids are: ASTM #3 oil, reference fuel and SAE J1034 engine coolant.(Testing to be performed in the standard test module without current passing through the fuse.)PREPARED BY THE SAE CIRCUIT PROTECTION AND SWITCHING DEVICESSTANDARDS TECHNICAL COMMITTEESA
38、E J2077 Issued NOV90RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThe fuses shown in Figure 1 are for use in motor vehicles, boats, and trailers to protect electricalwiring and equipment. This SAE Standard is for the construction shown and is not inten
39、ded to restrictthe design and use of other configurations and materials capable of meeting the vehicle requirements.Reference SectionSAE J726Air Cleaner Test CodeSAE J1034Engine Coolant ConcentrateEthylene-Glycol TypeASTM B 117Method of Salt Spray (Fog) TestingDeveloped by the SAE Circuit Protection and Switching Devices Standards Technical Committee
