Surface Mount Fuses Miniature Surface Mount Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse • Surface mount surge resistant Slo-Blo® fuse. • Meets UL 60950 3rd Edition power cross requirements stand alone. • Designed to allow compliance with Telcordia GR-1089-CORE and TIA-968-A (formerly FCC Part 68) Surge Specifications. • Provides coordinated protection with Littelfuse SIDACtor® Protection Thyristors without series resistors. • Ideal for use in telecommunication equipment including line cards, modems, fax machines, phones, answering machines, caller ID devices and other products connected to phone network. • 2A rating has improved temperature rise performance under 2.2A surge current testing when compared with 1.25A rating. • Product is RoHS Compliant and compatible with lead-free solders and higher temperature profiles when ordered with Standard Silver Plated Brass Caps. • Standard product is RoHS Compliant and compatible with lead-free solders and higher temperature profiles. AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. 6.10 (.240") 3.12 (.123") LF 1.25A T 12.6 (.496") 3.12 (.123") UL E10480 CSA LR29862 3.43 (.135") 1.70 typ (.067") Recommended Pad Layout UL E191008 CSA LR702828 PHYSICAL SPECIFICATIONS: Materials: Body: Ceramic RoHS Compliant Terminations: Silver Plated Brass Caps Terminations: Tin-Lead Alloy also available, add suffix, T. 2A Teccor: 3.25 (.128") 10.10 (.397") 1.25A Littelfuse: ® ® Reference Dimensions: .500A RoHS 100 Soldering Parameters: Reflow Solder — 230°C, 30 seconds maximum. Wave Solder — 260°C, 3 seconds maximum. 10 10 SURFACE MOUNT FUSES PACKAGING SPECIFICATIONS: 24mm Tape and Reel per EIA-RS481-2, (IEC 286 part 3); 2500 fuses per reel, add suffix, ER. Telecom Nano2 Catalog Number 0461.500 0461 1.25 0461 002. Teccor TeleLink Nominal Catalog Ampere Voltage Resistance Number Rating Rating Cold Ohms F0500T 0.5 250 .560 F1250T 1.25 250 .110 F1251T 2.00 250 .050 Nominal Melting I2t A2 Sec. .8401 16.51 17.51 TIME IN SECONDS ORDERING INFORMATION: 1 0.1 Notes: 1 2 I t is calculated at 10 msec or less. I2t at 10 times rated current has a typical value of: 24 A2sec (2.0A), 22 A2sec (1.25A), 1.3 A2sec (0.5A). • Typical inductance < 40nH up to 500 MHz. • Resistance changes 0.5% for every ˚C. • Resistance is measured at 10% rated current. 0.01 0.001 0.1 377 w w w. l i t t e l f u s e . c o m 1 10 CURRENT IN AMPERES 100 1000 Surface Mount Fuses Miniature Surface Mount Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse ELECTRICAL CHARACTERISTICS: Maximum Temperature Rise: Telecom Nano2 Fuse 04611.25 0461002. % of AmpereRating OpeningTime 100% 4 hours, Min. 250% 1 Second, Min.; 120 Seconds, Max. INTERRUPTING RATINGS: 50 amperes at 250 VAC. Temperature Reading < 82˚C (180˚F) < 50˚C (122˚F) • Higher Currents and PCB layout designs can affect this parameter. Readings are measured at rated current after temperature stabilizes. GR 1089 Inter-building requirements Temperature Derating Curve Operating Temperature is -55˚C to +125˚C with proper correction factor applied GR 1089 1st level lighting surge inter-building (Equipment under test can not be damaged & must continue to operate properly) 140 Minimum Max Repetitions Fuse Peak Rise/Min. Each Choices Current Decay Polarity (A) (µs) 100 10/1000 25 1.25, 2.0 100 10/360 25 1.25, 2.0 100 10/1000 25 1.25, 2.0 500 2/10 10 1.25, 2.0 25 10/360 5 0.5, 1.25, 2.0 PERCENT OF RATING* Surge Minimum Peak Voltage (V) 1 600 2 1000 3 1000 4 2500 5 1000 ® ® 120 100 80 60 If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4. GR 1089 2nd level lightning surge telecom port (Equipment under test shall not become a fire, fragmentation, or electrical safety hazard) Surge Minimum Minimum Max Repetitions Fuse Peak Peak Rise/Min. Each Choices Voltage Current Decay Polarity (V) (A) (µs) 1 5000 500 2/10 1 0.5, 1.25, 2.0 alternative 5000 5000/8=625 8/20 1 0.5, 1.25, 2.0 40 20 -60°C -76°F -40°C -40°F -20°C -4°F 0°C 20°C 40°C 60°C 80°C 100°C 32°F 68°F 104°F 140°F 176°F 212°F AMBIENT TEMPERATURE • Ambient temperature effects are in addition to the normal derating. The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus providing operational compliance. GR 1089 AC power fault 1st level inter-building (fuse not allowed to open) Test 1 2 3 4 5 6 7 8 9 Vrms Short Circuit Current (A) 50 .33 100 .17 200,400, 600 1 1000 1 Diagram Diagram 600 0.5 440 2.2 600 3 1000 5 Duration Primary Protector Fuse Choices 15 min. 15 min 60 x 1 sec. 60 x 1 sec. 60 x 5 sec. 30s 5 x 2 sec. 1.1 sec. 0.4 sec. removed removed removed operative removed removed removed removed in place 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 1.25, 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 GR 1089 AC power fault 2nd level (fuse can open but must open in a safe and controlled manner) Test Circuit 1 2 3 4 5 Vrms 120, 277 600 600 100-600 Diagram Short (A) 25 60 7 2.2 Diagram Duration 15 min. 5 sec. 5 sec. 15 min.. 15 min. Fuse 0.5, 0.5, 0.5, 0.5, 0.5, 1.25, 1.25, 1.25, 1.25, 1.25, 2.0 2.0 2.0 2.0 2.0 Fuse must open before wiring simulator fuse (MDL 2.0). w w w. l i t t e l f u s e . c o m 378 120°C 248°F Surface Mount Fuses Miniature Surface Mount Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse ® ® TIA –968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events) Surge Voltage Waveform Current (V) (µs) (A) Metallic A 800 10 x 560 100 Longitudinal A 1500 10 x 160 200 Metallic B 1000 9 x 720 25 Longitudinal B 1500 9 x 720 37.5 Waveform (µs) 10 x 560 10 x 160 5 x 320 5 x 320 Reps 1 1 1 1 ea. polarity ea. polarity ea. polarity ea. polarity Recommended Fuse 1.25 1.25 1.25 1.25 For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will not open, providing for operational compliance with TIA-968-A type A surge events. UL 60950 requirements UL60950 (EN 60950) (formerly UL 1950) Power Cross (L = longitudinal, M = metallic) Test Voltage Number (V) L1 600 L2 600 L3 600 L4 200 L5 120 M1 600 M2 600 M3 600 M4 600 Current (A) 40 7 2.2 2.2 25 40 7 2.2 2.2 Time 1.5 sec. 5 sec. 30 min. 30 min. 30 min. 1.5 sec. 5 sec. 30 min. 30 min. Fuse Choices 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 Selection of test number depends on current limiting & fire enclosure/spacing of end product • 26 AWG line cord removes L1/M1 test requirement • L5 conducted only if product does not pass section 6.1.2 • L2,M2,L3,M3,L4,M4 conducted if not in a fire enclosure Fuse must open before the wiring simulator fuse (MDL 2.0). UL60950 (EN 60950) (formerly UL 1950) Impulse Test & Steady-state electric strength test Voltage Current (V) (A) Impulse For handheld units Non handheld Steady-State For handheld units Non handheld 379 2500 1500 1500 1000 62.5 37.5 Waveform Repetitions 10 x 700µs + 10 w/60 sec. rest 10 x 700µs + 10 w/60 sec. rest 60Hz 60Hz Fuse Choices 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 0.5, 1.25, 2.0 w w w. l i t t e l f u s e . c o m SURFACE MOUNT FUSES Test 10