type frn series 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 flame- proof cement. all resistors are tested for value and tolerance. the technology allows the manufacture of custom fusible characteristics. key features superior quality resistors with fusing characteristics for overload conditions. flame-proof during fusing. ideal for use in safety- critical and circuit protection applications. these resistors fuse in less than 60 seconds at 16 times rated power. (see table) characteristics - electrical frn25 frn50s frn100s frn200s frn300s rated power @ 70c (w) 0.25 0.5 1 2 3 resistance range (ohms) min r12 r12 r33 r30 r30 max 12k 12k 10k 1k0 1k0 tolerance (%) 5 code letter j temperature coefficient (ppm/c) 350 200 (-30c to +150c) selection series e12 limiting element voltage 250 250 300 300 300 max permitted element voltage 250 250 300 350 350 max overload voltage 500 500 600 600 600 max intermittent overload voltage 500 500 600 600 600 max withstand voltage after fusing 300 350 450 450 450 operating temp. range (c) -55 to +155 climatic category 55/155/56 insulation resistance 1000m min dry (ohms) dimensions style 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 derating curve - frn25, frn50s, frn100s frn200s, frn300s 40 60 70 80 100 120 140 160 100 80 60 40 20 0 percent rated power ambient temperature (c) 20 60 70 100 140 180 220 260 100 80 60 40 20 0 percent rated power ambient temperature (c) 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 flame-proof fusible resistors type frn series
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 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 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 how to order frn 25 j 1k0 common part 25 - 1/4 watt 50s - 1/2 watt 100s - 1 watt 200s - 2 watts 300s - 3 watts size j - 5% tolerance resistance value frn - fusible leaded resistor 1 ohm (1 ohm) 1r0 1k ohm (1000 ohms) 1k0 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 flame-proof fusible resistors type frn series
mouser electronics authorized distributor click to view pricing, inventory, delivery & lifecycle information: te connectivity: ? FRN25J100R? frn25j10r? frn50j10r/s? frn25j2r2
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