1-1625879-1

Flame-Proof Fusible Resistors Type FRN Series Characteristics Electrical Type FRN Series FRN25 0.25 R12 12K Rated Power @ 70°C (W) Resistance Range (Ohms) Min Max Tolerance (%) Code letter Temperature Coefficient (ppm/°C) Selection Series Limiting Element Voltage Max Permitted Element Voltage Max Overload Voltage Max Intermittent Overload Voltage Max Withstand Voltage After Fusing Operating Temp. Range (°C) Climatic Category Insulation Resistance Min Dry (ohms) The resistive element comprises a resistive film sputtered onto a ceramic element. Metal end caps are force fitted to the element prior to spiralling. Tinned copper lead wires are welded to the end caps and the components are then coated with four layers of a flameproof cement. All resistors are tested FRN50S 0.5 R12 12K FRN100S 1 R33 10K 5 J FRN200S 2 R30 1K0 ±350 250 250 500 500 300 FRN300S 3 R30 1K0 ±200 (-30°C to +150°C) E12 300 300 600 600 450 -55 to +155 55/155/56 250 250 500 500 350 300 350 600 600 450 300 350 600 600 450 1000M for value and tolerance. The technology allows the manufacture of custom fusible characteristics. Dimensions Key Features ■ Superior quality resistors with fusing characteristics for overload conditions. ■ Flame-proof during fusing. ■ ■ Style Ideal for use in safetycritical and circuit protection applications. These resistors fuse in less than 60 seconds at 16 times rated power. (See table) L D d Nom l FRN25 6.3 ±0.5 2.3 ±0.3 0.54 25.0 FRN50S 6.3 ±0.5 2.3 ±0.3 0.54 25.0 FRN100S 9.0 ±0.5 3.2 ±0.5 0.54 25.0 FRN200S 11.0 ±1.0 4.5 ±1.0 0.70 25.0 FRN300S 15.0 ±1.0 5.5 ±1.0 0.80 25.0 100 100 80 80 60 40 20 0 60 40 20 0 40 60 70 80 100 120 140 160 Ambient Temperature (°C) Literature No. 1773218 Issued: 10-08 FRN200S, FRN300S Percent Rated Power Percent Rated Power Derating Curve FRN25, FRN50S, FRN100S Dimensions are shown for reference purposes only. Dimensions are in millimetres unless otherwise specified. 20 60 70 100 140 180 220 260 Ambient Temperature (°C) Specifications subject to change. tycoelectronics.com passives.tycoelectronics.com Flame-Proof Fusible Resistors Type FRN Series Mounting The resistors are suitable for processing on automatic insertion equipment. Marking The resistors are marked with a 3 colour band code indicating the value. The fourth band indicates the multiplier. The fifth band indicates the tolerance. Packaging FRN25, FRN50S and FRN100S are normally supplied taped in 'ammo' boxes of 4,000 pieces. FRN200S and FRN300S resistors are normally supplied taped in 'ammo' boxes of 1,000 pieces. Other package styles available on request. All tape specifications are in accordance with IEC 286-1. Fusing Characteristics Overload Power Maximum Fusing Time 16 times rated power 60 seconds 20 times rated power 40 seconds 24 times rated power 30 seconds 28 times rated power 20 seconds 32 times rated power 15 seconds Performance Characteristics The evaluation of the performance characteristics is carried out with reference to IECQ specifications QC 400 000 and QC 400 100. TEST REF Long Term Tests ±(5% + 0.5 ohm) 4.23 Climatic sequence 4.24 Damp heat, steady state 4.25.1 Endurance at 70 °C 4.25.3 Endurance at 155 °C TEST REF Short Term Tests ±(1% + 0.05 ohm) 4.13 Overload 4.16 Robustness of terminations 4.18 Resistance to soldering heat 4.19 Rapid change of temperature 4.22 Vibration How to Order FRN 25 J 1K0 Common Part Size Tolerance Resistance Value 25 - 1/4 Watt 50S - 1/2 Watt FRN - Fusible Leaded Resistor 100S - 1 Watt J - 5% 200S - 2 Watts 1 ohm (1 ohm) 1R0 1K ohm (1000 ohms) 1K0 300S - 3 Watts Literature No. 1773218 Issued: 10-08 Dimensions are shown for reference purposes only. Dimensions are in millimetres unless otherwise specified. Specifications subject to change. tycoelectronics.com passives.tycoelectronics.com