6/4/99 70 Maxess Road ! Melville, New York 11747 (631) 396-7500 ! Fax (631) 396-7575 PART MARKING GUIDE PRODUCTS: SMT THICK FILM CHIP RESISTORS AND ARRAYS SERIES: NRC AND NRSN Please be advised NIC Component NRC series of thick film chip resistors are marked with three digit (for E-24 5% tolerance values) or four digits (for E-96 1% tolerance values) resistance value marking codes. This marking is in compliance with EIA-575, the standard for chip resistors. Section 1.2.3 "Resistance", of the EIA standard, details the coding of the 3 and 4 digit marking codes. Table III shows designation 3-digit and 4-digit codes covering resistance values from 0.1ohm to 10 Meg-ohm. Table IV identifies the industry standard 1% (F) and 5% (J) tolerance values. Unfortunately Table IV contains several typographical errors, so please refer to the attached NIC Standard Resistance Values table for correct resistance values. COMPONENT MARKING: Please note the following marking systems are used on all 0603 (5% tolerance) and larger sizes (1% and 5% tolerance) chip resistor products. Marking is white lettering on black. E24 Values ( ±5% tolerance) 471 3 digit (±5% tolerance part) 470Ω example shown 3-digit codes (5% tolerances) breakdown as follows: • First and Second digits identify the resistance value. • The Third digit indicates the number of zeros. • "R" is used as decimal point on values below 10 ohms. Examples: 1.5 ohm = "1R5", 33 ohm = "330", 470 ohm = "471" code, 1200 ohm = "122" code, 10,000 ohm = "103", 560,000 ohm = "564" and 1,000,000 ohm = "105" “332” = 3300Ω Ω “220” = 22Ω Ω “220” = 22Ω Ω 8 TERMINAL 4 ELEMENT RESISTOR ARRAY “102” = 1000Ω Ω 10 TERMINAL 8 ELEMENT RESISTOR ARRAY ISO 9002 REGISTERED 6/4/99 70 Maxess Road ! Melville, New York 11747 (631) 396-7500 ! Fax (631) 396-7575 Part Marking continued… E96 Values ( ±1% tolerance) 4 digit (±1% tolerance part) 107,000Ω example shown. 1073 4-digit codes (1% tolerances) breakdown as follows: • First, Second and Third digits identify the resistance value. • The Fourth digit indicates the number of zeros. • "R" is used as decimal point on values below 100 ohms. Examples: 1.15 ohm = "1R15", 33.2 ohm = "33R2", 475 ohm = "4750" code, 1270 ohm = "1271" code, 10,500 ohm = "1052", 562,000 ohm = "5623" and 1,000,000 ohm = "1004" “1003” = 100,000Ω Ω Special Cases: Non-standard value ±1% (F) tolerance chip resistors. Please be advise ±1% (F) tolerance chip resistors supplied in the following non-standard E96 values will be marked with 3-digit codes: 1. E24 (±5% tolerance) values: 120,160,180,220,240,270,300,330,360,390,430,470,510,560,620,680,820 and 910. Ωand below 10Ω Ω. 2. Values above 1 MegΩ For example: • P/N: NRC10F1005TR (10 MegΩ±1%) is a special value and is supplied marked with 3-digit code; “106”. • P/N: NRC12F4702TR (47KΩ±1%) is a standard E24 value in special ±1% (F) tolerance and is supplied marked with 3-digit code; “473”. 0603 SIZE E96 (±1% TOLERANCE): Due to limited space special 3-digit codes, per JIS-C-5201 (see example below), are used for 0603 size (±1% tolerance) parts. "07" is code for "115" value 1 "B" is code for 10 multiplier Ω "07B" is marking code for 1150Ω 10C "10" is JIS C 5201 code for "124" value 2 "C" is JIS C 5201 code for 10 multiplier Ω "10C" is marking code for 12,400Ω 0402 SIZE PARTS: 0402 size parts are too small to resistance value mark ISO 9002 REGISTERED 6/4/99 70 Maxess Road ! Melville, New York 11747 (631) 396-7500 ! Fax (631) 396-7575 Part Marking continued… Standard Resistance Values (PER EIA-575 & RS 460) E12 E24 10 12 15 18 22 27 33 39 47 56 68 82 91 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 E96 10.0 10.2 10.5 10.7 11.0 11.3 11.5 11.8 12.1 12.4 12.7 13.0 13.3 13.7 14.0 14.3 14.7 15.0 15.4 15.8 16.2 16.5 16.9 17.4 17.8 18.2 18.7 19.1 19.6 20.0 20.5 21.0 21.5 22.1 22.6 23.2 23.7 2.43 24.9 25.5 26.1 26.7 27.4 28.0 28.7 29.4 30.1 30.9 31.6 32.4 33.2 34.0 34.8 35.7 36.5 37.4 38.3 39.2 40.2 41.2 42.2 43.2 44.2 45.3 ISO 9002 REGISTERED 46.4 47.5 48.7 49.9 51.1 52.3 53.6 54.9 56.2 57.6 59.0 60.4 61.9 63.4 64.9 66.5 68.1 69.8 71.5 73.2 75.0 76.8 78.7 80.6 82.5 84.5 86.6 88.7 90.9 93.1 95.3 97.6