Bussmann® Aircraft Limiter ACH Fast-Acting Dimensional Data All other tolerances (± 0.005) in (± 0.13) mm A D BUSS Catalog Symbol: ACH Fast-Acting Ampere Rating: 1 to 60 Amperes Voltage Rating: 208 Volts AC 125 Volts DC Interrupting Rating: 6000A @ 120 VAC 4200A @ 208 VAC 6000A @ 125 VDC At sea level to 6000 ft. Test specification - carry 200% rated current for 5 minutes, open at 240% within 5 minutes. C 30 ACH B 0.98" .425" (25.0mm) (10.8mm) 0.19" (4.76mm) For Military Use Qualified to MIL-F-5372C Military Type Designation Buss Cat. Symbol Military Type Designation Buss Cat. Symbol MS28938-02 ACH2 MS28938-25 ACH25 MS28938-03 ACH3 MS28937-30 ACH30 MS28937-05 ACH5 MS28938-35 ACH35 MS28937-10 ACH10 MS28937-40 ACH40 MS28938-15 ACH15 MS28937-50 ACH50 MS28937-20 ACH20 MS28937-60 ACH60 Symbol Amperes A B C D ACH 2, 3, 5, 10, 15, 20, 25 or 30 1.97∑ (50.0mm) 0.06∑ (1.59mm) 0.48∑ (12.3mm) 1.33∑ (33.8mm) ACH 35, 40, 50 or 60 2.22∑ (56.39mm) 0.09∑ 0.55∑ (2.27mm) (13.97mm) 1.45∑ (36.83mm) 12-17-98 SB98107 Rev. A Buss Aircraft Fuses Mechanical Indicating - Limiter type • ACH limiters are designed to meet the very rigorous requirements of high speed, high performance aircraft. • Isolate faults or grounds in aircraft electric systems of 120/208 volts 400 cycles AC or 125 volts DC. • ACH limiters give visual indication when open by a springactivated pin that extends from the limiter body. • The knife blade terminals on ACH limiters are silver-plated. • Limiters are made with a silicone body that assures reliable performance under severe conditions. • Designed to withstand exposure to moisture, fungus, salt spray, sand and dust, and mechanical vibration and shock. Form No. ACH Page 1 of 2 BIF Doc #1041 Bussmann® Aircraft Limiter ACH Fast-Acting 30 40 50 60 20 10 Time-Current Characteristic Curves–Average Melt AMPERE RATING 100 Fuseblocks • All metal parts silver-plated. • Clips are beryllium copper. • The blocks have molded melamine base and are qualified to MIL-F-5373C. TIME IN SECONDS 10 1 to 30 Amp 1 35 to 60 Amp Catalog Number Dimension of base, inches Catalog Number Dimension of base, inches 3887 (1-pole) 0.688∑ ≈ 3.125∑ 3889 (1-pole) 0.844∑ ≈ 3.375∑ 3888 (2-pole) 1.188∑ ≈ 3.125∑ 3890 (2-pole) 1.594∑ ≈ 3.375∑ 3967 (3-pole) 1.625∑ ≈ 3.125∑ 3968 (3-pole) 2.25∑ ≈ 3.375∑ 2,000 1,000 100 10 .01 4 .1 CURRENT IN AMPERES The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. 12-17-98 SB98107 Rev. A Form No. ACH Page 2 of 2 BIF Doc #1041