LST3205VL2NT1 LITTELFUSE | Alldatasheet

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Features

  • Type 1 and Type 2 Surge Protective Devices (SPDs) Agency Standard Agency File Number UL1449 E320116 The LST Varistor Series is constructed with Littelfuse’s renowned thermally protected varistor technology (TMOV). The built-in thermal disconnecting function and electric arc shield prevent catastrophic failure and fire hazard even under the extreme circumstances of varistor end-of-life or abnormal overvoltage conditions. It is specifically designed as a Type 1 Component Assembly Surge Protective Device (SPD) and is suitable for Type 1 and Type 2 SPDs.
  • Short Circuit Current Rating (SCCR) of 200 kA and Nominal Discharge Current Rating (In) of 20 kA
  • Available in both Maximum Discharge Current (Imax) ratings of 50 kA and 75 kA. Both ratings utilize the same footprint and PCB layout
  • Mechanically triggered AC and DC rated micro-switch with Normally Open or Normally Closed options for remote indication and/or monitoring circuit
  • Visual tab option to display LST working status
  • RoHS compliant, Lead-free, and Halogen-free
  • UL Recognized to UL 1449 and CSA C22.2 No. 269.4 as a Type 1 Component Assembly (Type 1CA)
  • Suitably rated for Type 1 and 2 SPD applications
  • Same PCB layout/design for 50 kA and 75 kA Imax rated SPDs
  • More flexibilities/options for designing an isolated remote indication/monitoring circuit
  • Clear indication for technician/engineer to replace EOL product to continue surge protection for the end product
  • Environment-friendly
  • Facilitate meeting UL 1449 or CSA C22.2 No. 269.1 and 269.2 for Type 1 or Type 2 SPDs T ypical Circuit Diagram with Normally Open Switch General T echnical Specification Standard Units Climatic Category IEC 60068-1 40/85/56 Operating Temperature IEC 61051-1 -40° C ~ +85° C Storage Temperature -40° C ~ +85° C Voltage Proof IEC 61051-1 ≥ 2.5 kVRMS Insulation Resistance IEC 61051-1 ≥ 100 MΩ To Protected DevicePower Source Thermal Disconnector Metal Oxide Varistor (MOV) C (Common) NO (Normally Open) Thermal Connection Isolation Primary Side Contact Lead MOV Lead Galvanic Isolation Secondary Side Note: This typical circuit shows how the switch pins (C and NO) can be used to indicate the connection status of thermal disconnector for remote indication. This denotes that the circuit will be no longer protected from surge currents by the MOV after the thermal disconnector forms open circuit. Pb

Metal Oxide Varistors (MOVs) LST Varistor Series > SPD Thermally Protected Varistor © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/18/21 Switch Function Configuration Note: For LST***7 device with Imax 75 kA rating, thermal disconnector may safely open circuit without any damage to the device after Imax test. Electrical Specifications Part Number Specifications (85° C) Specifications (25° C) Maximum Continuous Operating Voltage (MCOV) Peak Surge Current (8/20 μs, 1 Pulse) Nominal Discharge Current (8/20 μs,

15 Pulses)

( V ) ( kA ) ( kA ) ( V ) ( kA ) LST1505VL2NT1 150 50 20 600 200 LST1507VL2NT1 150 75 20 600 200 LST1805VL2NT1 180 50 20 800 200 LST1807VL2NT1 180 75 20 800 200 LST2755VL2NT1 275 50 20 900 200 LST2757VL2NT1 275 75 20 900 200 LST3205VL2NT1 320 50 20 1000 200 LST3207VL2NT1 320 75 20 1000 200 LST3855VL2NT1 385 50 20 1500 200 LST3857VL2NT1 385 75 20 1500 200 LST4205VL2NT1 420 50 20 1500 200 LST4207VL2NT1 420 75 20 1500 200 LST5105VL2NT1 510 50 20 1500 200 LST5107VL2NT1 510 75 20 1500 200 LST5505VL2NT1 550 50 20 1500 200 LST5507VL2NT1 550 75 20 1500 200 LST6905VL2NT1 690 50 20 2000 200

  • Normally-open and/or normally-closed switch functions are available for remote indication circuit to identify LST working status
  • Switch pins of Common (“C”) and Normally-Open (“NO”) can be connected together for normally-open monitoring circuit
  • Switch pins of Common (“C”) and Normally-Closed (“NC”) can be connected together for normally-closed monitoring circuit
  • Electrical rating for switch pin: 60 Vdc/0.2 A, or 250 Vac/0.1 A
  • “Visual Tab” within housing: LST is still functional
  • “Visual Tab” shows up (Optional): LST has been activated and needs to be replaced Switch Functions Switch Pins Connected to Signal Circuit Normally Open C and NO Normally Closed C and NC Normally Open & Normally Closed C and NO: Normally Open monitoring circuit C and NC: Normally Closed monitoring circuit No Function No switch pin

Metal Oxide Varistors (MOVs) LST Varistor Series > SPD Thermally Protected Varistor © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/18/21 2X .157 [4.0] 2X .079 [2.0] 3X .200 [5.08] .223 ± .040 [5.7 ± 1] .146 ± .040 [3.7 ± 1] .627 ± .020 [15.9 ± 0.5] .024 [0.6] .012 [0.3] SEE NOTE A L ± .040 [±1] T ± .040 [±1] .406 ± .040 [10.3 ± 1] 3X .035 [0.9] .100 MAX [2.5] (Blown Position) 1 .079 [27 .4] 1 .394 [35.4] 1 .733 ± .020 [44.0 ± 0.5] 1 .37 4 ± .040 [34.9 ± 1] MOV LEAD MOV LEAD CONTACT LEAD TOLERANCE UNLESS OTHERWISE SPECIFIED: ± .020 [± 0.5] CONTACT LEAD 1 .687 ± .020 [42.8 ± 0.5] PCB Layout for Switch Pins (Unit: Inch [mm]) PCB Layout for LST T erminations (Unit: Inch [mm]) LST Mechanical Dimensions (Unit: Inch [mm]) NOTE A MCOV A Dimension (inch [mm]) .221 [5.7] .200 [5.08] .843 [21 .4] .100 [2.5] 1 .687 [42.8] .627 [15.9] 2 x Ø.059 [Ø1 .5] SWITCH LEADS SWITCH FUNCTION: Normally Open Product Label Side SWITCH FUNCTION: Normally Closed SWITCH FUNCTION: Normally Open & Normally Closed .221 [5.7] .400 [10.2] .843 [21 .4] .100 [2.5] 1 .687 [42.8] .627 [15.9] 2 x Ø.059 [Ø1 .5] SWITCH LEADS SWITCH LEADS Product Label Side .221 [5.7] .400 [10.2] .843 [21 .4] .100 [2.5] .200 [5.08] 1 .687 [42.8] .627 [15.9] 3 x Ø.059 [Ø1 .5] Product Label Side MOV LEAD CONTACT LEAD SCALE: 2:1 TOLERANCE: ± .005 [± 0.127] .627 [15.9] .146 [3.7].407 [10.3] A 1 .375 [34.9] 2 x .037 [0.9] 2 x .325 [8.3] 1 .687 [42.9] Product Label Side

Metal Oxide Varistors (MOVs) LST Varistor Series > SPD Thermally Protected Varistor © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/18/21 Part Numbering System Packaging Method LST 320 5 V L1 N T1 Xxxxx Product Series Voltage Rating Visual T abs V: Visual tabs E: No tabs Imax Rating 5: Imax 50 kA 7: Imax 75 kA Pin Length L1: 11 .9 mm L2: 5.3 mm L0: No pin Switch Pin Options N: NO, 2 pins C: NC, 2 pins S: NO & NC, 3 pins B: No switch pin T erminal Length T1: 15.7 mm T2: 5.6 mm T3: 10.0 mm Suffix Code Customized options Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used Quantity Other Specs Carton size 24 pcs/tray Total 72pcs in three trays One blank tray on the top for protection purpose 370 mm (L) x 370 mm (W) x 100 mm (H)