0461.500ERT LITTELFUSE

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 3

Technical content

Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse ® ® LF 1.25A T 3.12 (.123") 3.12 (.123") 10.10 (.397") 3.25 (.128") 3.43 (.135") 12.6 (.496") 6.10 (.240") Recommended Pad Layout1.70 typ (.067")

  • 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. Telecom Teccor Nano2 TeleLink Nominal Nominal Catalog Catalog Ampere Voltage Resistance Melting I 2t Number Number Rating Rating Cold Ohms A 2 Sec. 0461.500 F0500T 0.5 250 .560 .840 1 0461 1.25 F1250T 1.25 250 .110 16.5 1 0461 002. F1251T 2.00 250 .050 17.5 1 ORDERING INFORMATION: Notes: 1 I2t is calculated at 10 msec or less. I 2t at 10 times rated current has a typical value of:
  • Typical inductance < 40nH up to 500 MHz.
  • Resistance changes 0.5% for every ˚C.
  • Resistance is measured at 10% rated current. AGENCY APPROVALS:Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. Littelfuse: UL E10480 CSA LR29862 Teccor: 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. Soldering Parameters: Reflow Solder — 230°C, 30 seconds maximum. Wave Solder — 260°C, 3 seconds maximum. PACKAGING SPECIFICATIONS:24mm Tape and Reel per EIA-RS481-2, (IEC 286 part 3); 2500 fuses per reel, add suffix, ER. Reference Dimensions: 10001001010.1 0.001 0.01 0.1 100 CURRENT IN AMPERES TIME IN SECONDS 1.25A .500A Miniature Surface Mount 377 Surface Mount Fuses www.littelfuse.com RoHS

www.littelfuse.com ® ® Maximum Temperature Rise: Telecom Nano2 Fuse Temperature Reading

  • Higher Currents and PCB layout designs can affect this parameter. Readings are measured at rated current after temperature stabilizes. Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse INTERRUPTING RATINGS: 50 amperes at 250 VAC. PERCENT OF RATING* AMBIENT TEMPERATURE 100 120 140 Operating Temperature is -55˚C to +125˚C with proper correction factor applied
  • Ambient temperature effects are in addition to the normal derating. Temperature Derating Curve Surge Minimum Minimum Max Repetitions Fuse Peak Peak Rise/Min. Each Choices Voltage Current Decay Polarity (V) (A) ( µs) 1 600 100 10/1000 25 1.25, 2.0 2 1000 100 10/360 25 1.25, 2.0 3 1000 100 10/1000 25 1.25, 2.0 4 2500 500 2/10 10 1.25, 2.0 5 1000 25 10/360 5 0.5, 1.25, 2.0 If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4. GR 1089 Inter-building requirements GR 1089 1st level lighting surge inter-building (Equipment under test can not be damaged & must continue to operate properly) GR 1089 AC power fault 2nd level (fuse can open but must open in a safe and controlled manner) Test Vrms Short Duration Fuse Circuit (A) 1 120, 277 25 15 min. 0.5, 1.25, 2.0 2 600 60 5 sec. 0.5, 1.25, 2.0 3 600 7 5 sec. 0.5, 1.25, 2.0 5 Diagram Diagram 15 min. 0.5, 1.25, 2.0 Fuse must open before wiring simulator fuse (MDL 2.0). ELECTRICAL CHARACTERISTICS: % of AmpereRating OpeningTime 100% 4 hours, Min. 250% 1 Second, Min.; 120 Seconds, Max. GR 1089 AC power fault 1st level inter-building (fuse not allowed to open) Test Vrms Short Duration Primary Fuse Circuit Protector Choices Current (A) 1 50 .33 15 min. removed 1.25, 2.0 2 100 .17 15 min removed 1.25, 2.0 3 200,400, 600 1 60 x 1 sec. removed 1.25, 2.0 4 1000 1 60 x 1 sec. operative 1.25, 2.0 5 Diagram Diagram 60 x 5 sec. removed 1.25, 2.0 6 600 0.5 30s removed 1.25, 2.0 7 440 2.2 5 x 2 sec. removed 1.25, 2.0 8 600 3 1.1 sec. removed 1.25, 2.0 9 1000 5 0.4 sec. in place 1.25, 2.0 GR 1089 2nd level lightning surge telecom port (Equipment under test shall not become a fire, fragmentation, or electri- cal 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 The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus providing operational compliance.

www.littelfuse.com Telecom NANO2® Fuse 461 Series and Teccor TeleLink® Fuse ® Test Voltage Current Waveform Repetitions Fuse (V) (A) Choices Impulse Steady-State For handheld units 1500 60Hz 0.5, 1.25, 2.0 Non handheld 1000 60Hz 0.5, 1.25, 2.0 Surge Voltage Waveform Current Waveform Reps Recommended (V) ( µs) (A) ( µs) Fuse Metallic A 800 10 x 560 100 10 x 560 1 ea. polarity 1.25 Longitudinal A 1500 10 x 160 200 10 x 160 1 ea. polarity 1.25 Metallic B 1000 9 x 720 25 5 x 320 1 ea. polarity 1.25 Longitudinal B 1500 9 x 720 37.5 5 x 320 1 ea. polarity 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. TIA –968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events) UL60950 (EN 60950) (formerly UL 1950) Power Cross (L = longitudinal, M = metallic) Test Voltage Current Time Fuse Number (V) (A) Choices L2 600 7 5 sec. 0.5, 1.25, 2.0 L5 120 25 30 min. 0.5, 1.25, 2.0 M2 600 7 5 sec. 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). UL 60950 requirements UL60950 (EN 60950) (formerly UL 1950) Impulse Test & Steady-state electric strength test