Bussmann® Microtron® Printed Circuit Board Fuses MCR .122∑ ≈ .297∑ (3.10mm ≈ 7.54mm) R Product Name: MCR (Microtron®) Characteristics: Fast-Acting, Current-Limiting Construction: Solid Matrix Packaging & Ordering Information: TIME IN SECONDS 1 *All tolerances: ±0.005" ±0.13mm Dimensional Data 1.13" 28.58mm 1.13" 28.58mm .297" 7.54mm .12" 3.10mm AMPERE RATING 1/4 3/8 1/2 3/4 1.0 1.5 2.0 2.5 3.0 4.0 5.0 7.0 10.0 10 1/16 1/8 Time-Current Characteristic Curves–Average Melt (Full Size Curves Available) .1 .025" 0.64mm MCR .01 (See Table) Product Rated Current Symbol Package Code Blank10 in BK 500 in TR/ Tape/Reel 2500 units, 52.4mm spacing TR1/ Tape/Reel 5000 units, 52.4mm spacing TR6/ Tape/Reel 1000 units, 52.4mm spacing Radial leaded versions available (.4∑, .6∑ spacing) 100 10 1 .1 .01 .001 CURRENT IN AMPERES Weight = 2.45 lbs/2500 Time-Current Characteristics: Rated CE logo denotes compliance with European Union Low Voltage Directive (50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact Bussmann Application Engineering at 314-527-1270 for more information. Percent of Rating Current 100% 250% 0-10A 4 hrs. (min) 5 sec. (max) Electrical Characteristics AC DC Typical Total Clearing2 I2t (A2sec) AC DC Typical Voltage Drop Volts at 100% Rated Current Agency* Approvals JIS Pre-arcing2 I2t (A2sec) CSA Interrupting Rating1 AC DC UR Current Rating Rated Voltage AC (Max.) DC (Max.) 125V 125V 50A 300A 1.1 ≈ 10-6 1.0 ≈ 10-7 1.8 ≈ 10-6 1.5 ≈ 10-7 2.33 • • 125V 125V 50A 300A 4.3 ≈ 10-6 7.1 ≈ 10-7 7.3 ≈ 10-6 8.7 ≈ 10-7 1.52 • • -5 -6 -4 -6 125V 125V 50A 300A 8.0 ≈ 10 1.0 ≈ 10 1.2 ≈ 10 1.3 ≈ 10 .76 • • -5 -6 -4 -6 125V 125V 50A 300A 9.7 ≈ 10 6.7 ≈ 10 1.1 ≈ 10 8.3 ≈ 10 .73 • • 125V 125V 50A 300A 7.4 ≈ 10-4 5.4 ≈ 10-5 6.2 ≈ 10-3 6.8 ≈ 10-5 .65 • • 125V 125V 50A 300A 1.3 ≈10-3 7.4 ≈ 10-5 7.5 ≈ 10-2 9.2 ≈ 10-5 .55 • • 125V 125V 50A 300A .01 .01 .02 .01 .24 • • • 125V 125V 50A 300A .03 .02 .04 .03 .20 • • • 125V 125V 50A 300A .09 .07 .11 .08 .16 • • • 125V 125V 50A 300A .19 .14 .25 .17 .15 • • • 125V 125V 50A 300A .35 .28 .45 .32 .15 • • • 125V 125V 50A 300A .56 .37 .83 .43 .14 • • • 125V 125V 50A 300A .96 .67 1.37 .77 .13 • • • 125V 125V 50A 300A 1.82 1.34 2.53 1.51 .11 • • • 60V 90V 50A 300A 1.48 .49 2.02 .58 .10 • • 60V 90V 50A 300A 3.62 1.16 4.41 1.38 .08 • • UL Recognition STD 248-14, Guide JDYX2, File E19180; CSA Certification, Class 1422-01, File 53787. JIS (Japanese Industrial Standard) Reg. No. 2221, Authorization No. 32-1516. 1. Interrupting ratings were measured at 100% (⁄Ω¡§ to 5) and 100% (7, 10) power factors on AC, and a time constant less than 1ms. on D.C. 2 2. I t was measured at 50 amps 125 VAC, .95PF, (random closing angle) and 300 amps 125 VDC, TC <1ms. for ⁄Ω¡§ through 5 amps and 50 amps 60 VAC, .95PF, (random closing angle), and 300 amps 90 VDC, TC <1ms. for the 7 and 10 amp fuses. Note: All values shown above are typical. ⁄Ω¡§ ⁄Ω• ⁄Ω¢ ‹Ω• ⁄Ω™ ‹Ω¢ 1 1⁄Ω™ 2 2⁄Ω™ 3 3⁄Ω™ 4 5 7 10 *Approvals: Bussmann rev. 7/28/97 Form No. MCR Page 1 of 2 BIF Doc #2003 Bussmann® Microtron® Printed Circuit Board Fuses MCR .122∑ ≈ .297∑ (3.10mm ≈ 7.54mm) R Typical Voltage Drop (At 25° C Ambient Temperature) 0.25 Voltage Drop 0.2 MCR-1⁄Ω™ MCR-2 MCR-2⁄Ω™ MCR-3 MCR-3⁄Ω™ MCR-5 MCR-10 MCR-4 MCR-7 0.15 0.1 0.05 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percent of Rated Curent Voltage Drop MCR-1 2 MCR-⁄Ω¡§ 1.8 1.6 1.4 1.2 MCR-⁄Ω¢ 1 MCR-‹Ω• 0.8 MCR-⁄Ω• MCR-⁄Ω™ 0.6 MCR-‹Ω¢ 0.4 0.2 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percent of Rated Current Microtron fuses are designed to meet the following specifications: Body High temperature thermoplastic, flammability rating UL 94 VO. Electrical Characteristics Carry 100% rated current for 4 hours minimum. Open at 250% of rated current in 5 seconds maximum. Resistance to Soldering Heat MIL-STD-202, Method 210, Test Condition C (260°C). Salt Spray MIL-STD-202, Method 101, Test Condition B. Shock MIL-STD-202, Method 213, Test Condition I, 100G’s for 6 milliseconds. Element Solid Matrix, gold or silver element encapsulated in ceramic. Solderability MIL-STD-202, Method 208. Leads Tin-plated copper, .64mm (.025∑) diameter. Terminal Strength Lead Bend Test With a two pound weight attached, 90° one direction, back to original position, then 90° opposite direction; fuse will withstand two cycles. MIL-STD-202, Method 211, Test Condition A, will withstand 7 lb. axial pull test. Thermal Shock MIL-STD-202, Method 107, Test Condition B, -65°C to 125°C. Thermal Cycle EIA-STD-RS-186-C, Test Condition A, -55°C to 85°C. Vibration MIL-STD-202, Method 204, Test Condition C, (55 to 2000 HZ, 10G’s peak). Wave Soldering Maximum reservoir temperature 260°C, 10 second maximum exposure, .125" from body. Life Test 2000 hours at 80% rated current, 55°C. Moisture Resistance MIL-STD-202, Method 106, 90% relative humidity at 65°C. Operating Temperature -55°C to 125°C with proper fuse derating. Packaging EIA-STD-296-E. 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. Bussmann rev. 7/28/97 Form No. MCR Page 2 of 2 BIF Doc #2003