3812 Size RoHS 6 Compliant Type SMM Square Ceramic Surface Mount Medium Blow Fuse SMM Feb 2012D Pb SMM Series Fuse Features - Medium Blow - Suface mount high current fuse - Current rating from 20A to 30A - Wide operating temperature range from -55oC to 125oC - Tape and Reel for auto-insert SMD process - Compatible with reflow process - Halogen Free - Leadfree Pb Applications Electrical Characteristics (UL / CSA /STD.248-14) - Voltage regulator module - PC server - Office electronic equipment - Industrial equipment - Medical equipment - POE, POE+ - Power supply - DC-DC Converter HALOGEN FREE = LEAD FREE = HF Pb Safety Agent Approvals SAFETY AGENCY SAFETY AGENCY CERTIFICATE E20624 AMPERE RANGE / VOLT @ I.R.ABILITY 20A - 30A / 250V @100A AC 125V @ 150A AC 72V @ 130A DC 65V @ 300A DC 20A - 30A Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ‧Tel: 201-432-0463 ‧Fax: 201-432-9542 ‧E-Mail: belfuse.com Website: www.belfuse.com 3812 Size RoHS 6 Compliant Type SMM Pb Square Ceramic Surface Mount Medium Blow Fuse SMM Feb 2012C Electrical Specifications Nominal Nominal Cold Volt-drop Resistance @100% In (ohm) (volt) Catalog Number Ampere Rating (A) SMM 20 20A 0.0025 0.09 SMM 25 25A 0.0019 0.08 SMM 30 30A 0.0013 0.07 Interrupting Rating 20A - 30A / 250V @100A AC 125V @ 150A AC 72V @ 130A DC 65V @ 300A DC Agency Approvals Max. Voltage Rating (V) Melting I2T @ 10 In (A2 Sec) Min. Nominal Power Dissipation (W) 250 270 1.8 Y Y 250 420 2.0 Y Y 250 1000 2.1 Y Y Soldering Guidelines Reflow Conditions Recommended: 240°C, 30 sec. max. Pb-Free Process Compatibility: When soldered to test boards using IR reflow in accordance with JEDEC J-STD-020 (260°C, 40 sec. max.), SMM samples exhibited DCR change of +10% to -20% from initial values. Subsequent tests showed all samples complied with the stated electrical characteristics on this data sheet. NOT Recommended for Wave solder / Direct immersion / Hand Solder NOTES: Test Conditions For all SMM data, as well as UL Component investigation, all tests were conducted with fuse samples soldered on a PCB (1.6mm thick) test board with copper traces measuring 0.1 mm nominal thickness (3 oz.clad), 10mm wide and 100 mm overall length. – UL Condition of Acceptability - the following information is contained in the UL Component Recognition for SMM Fuse Series: The maximum temperature recorded in open air was 100 oC in a 21 oC ambient (79 oC rise). Consideration should be given to checking operating temperatures in end-use application with regard to thermal index of surrounding materials and components. (Maximum temperature recorded at 80% of rating (24A) for the SMM30 rating was 69oC (48 oC rise). Caution: -Minimum fusing point: The SMM Series fuses are NOT intended to be operated at currents between 100% and 200% of ampere rating. Prolonged operation at currents in this range may result in overheating of the fuse and/or desoldering of the fuse caps from the PCB pad. Average Time Current Curve Temperature Derating Curve 140 130 SMM - TIME CURRENT CHARACTERISTIC CURVE Percent of Rated Current 120 20A 25A 30A 110 100 100000 90 80 70 10000 60 50 -75-65-55-45-35-25-15 -5 5 15 25 35 45 55 65 75 85 95105115125135145 1000 TIME IN SECONDS Ambient Temperature [oC] 100 10 1 0.1 0.01 10 100 1000 CURRENT IN AMPERES CORPORATE OFFICE Bel Fuse Inc. FAR EAST OFFICE Bel Fuse Ltd. EUROPE OFFICE Bel Fuse Europe Ltd. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 E-Mail: [email protected] Website: www. belfuse.com 8/F Luk Hop Industrial Building Preston Technology Management Centre 8 Luk Hop Street Marsh Lane, Suite F15 San Po Kong Preston, Lancashire, PR1 8UQ Kowloon, Hong Kong United Kingdom Tel 852-2328-5515 Tel 44-1772-556601 Fax 852-2352-3706 Fax 44-1772-888366 EUROPE Bel Stewart GmbH Industriestrasse 20 61381 Friedrichsdorf Germany Tel 49-6172-9552-0 Fax 49-6172-9552-40 Type SMM Pb 3812Size RoHS 6 Compliant Square Ceramic Surface Mount Medium Blow SMM Feb 2012D Soldering Parameters 240oC max. 20-30 seconds. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ‧Tel: 201-432-0463 ‧Fax: 201-432-9542 ‧E-Mail: belfuse.com Website: www.belfuse.com 3812 Size RoHS 6 Compliant Type SMM SSQDNOV201 Square Ceramic Surface Mount Medium Blow Fuse Pb Pb SMM Feb 2012C Physical Specifications Environmental Specifications Ordering Information Mechanical Dimensions 2.0±0.2mm (0.08''±0.008'' 3.1±0.1mm (0.12''±0.004'' ) 3.1±0.1mm (0.12''±0.004'' ) 9.8±0.2mm (0.39''±0.008'') 3.8mm (0.15") 4.1mm (0.16") 5.6m m(0.2 2") Packaging CORPORATE OFFICE Bel Fuse Inc. FAR EAST OFFICE Bel Fuse Ltd. EUROPE OFFICE Bel Fuse Europe Ltd. EUROPE Bel Stewart GmbH 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 E-Mail: [email protected] Website: www. belfuse.com 8/F Luk Hop Industrial Building 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 Preston Technology Management Centre Marsh Lane, Suite F15 Preston, Lancashire, PR1 8UQ United Kingdom Tel 44-1772-556601 Fax 44-1772-888366 Industriestrasse 20 61381 Friedrichsdorf Germany Tel 49-6172-9552-0 Fax 49-6172-9552-40