VR25 Vishay BCcomponents High Ohmic/High Voltage Resistors FEATURES • • • • High pulse loading capability Small size Lead (Pb)-free solder contacts Pure tin plating provides compatibility with lead (Pb)-free and lead containing soldering processes • Compatible with "Restriction of the use of Hazardous Substances" (RoHS) directive 2002/95/EC (issue 2004) APPLICATIONS • Where high resistance, high stability and high reliability at high voltage are required • High humidity environment • White goods • Power supplies A metal glazed film is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned electrolytic copper wires are welded to the end-caps. The resistors are coated with a light blue lacquer which provides electrical, mechanical, and climatic protection. The encapsulation is resistant to all cleaning solvents in accordance with “MIL-STD 202E, method 215” and “IEC 60068-2-45”. TECHNICAL SPECIFICATIONS DESCRIPTION Resistance range1) Resistance tolerance and series: 100 kΩ to 15 MΩ 15 MΩ to 22 MΩ Maximum dissipation at Tamb = 70 °C Thermal resistance, Rth Temperature coefficient Maximum permissible voltage: DC RMS Dielectric withstanding voltage of the insulation for 1 minute Basic specifications Climatic category (IEC 60068) Stability after: load (1000 hours) accelerated damp heat test (6 days) long term damp heat test (56 days) Noise VALUE 100 kΩ to 22 MΩ ± 1 %: E24/E96 series; ± 5 %: E24 series ± 5 %: E24 series; ± 10 %: E12 series 0.25 W 140 K/W ≤ ± 200 × 10-6/K 1600 V 1150 V 700 V IEC 60115-1B 55/155/56 ∆R/R max.: ± 1.5 % + 0.1 Ω ∆R/R max.: ± 1.5 % + 0.1 Ω ∆R/R max.: ± 1.5 % + 0.1 Ω max. 5 µV/V Note 1. Ohmic values (other than resistance range) are available on request. 12NC INFORMATION • The resistors have a 12-digit numeric code starting with 2322 241 • The subsequent: first digit for 1 % tolerance products (E24 and E96 series) or 2 digits for 5 % (E24 series) and 10 % (E12 series) indicate the resistor type and packing. • The remaining digits indicate the resistance value: – The first 3 digits for 1 % or 2 digits for 5 and 10 % tolerance products indicate the resistance value. – The last digit indicates the resistance decade. www.vishay.com 168 Last Digit of 12NC Indicating Resistance Decade RESISTANCE DECADE LAST DIGIT 100 to 976 kΩ 1 to 9.76 MΩ ≥ 10 MΩ 4 5 6 12NC Example The 12NC for a VR25, resistor value 7.5 MΩ, 5 % tolerance, supplied on a bandolier of 1000 units in ammopack, is: 2322 241 13755. For technical questions contact: [email protected] Document Number: 28732 Revision: 06-Dec-05 VR25 Vishay BCcomponents High Ohmic/High Voltage Resistors 12NC - resistor type and packing ORDERING CODE 2322 241 ..... BANDOLIER ON REEL BANDOLIER IN AMMOPACK TOL. (%) TYPE STRAIGHT LEADS RADIAL TAPED 4000 units VR25 52 mm 26 mm 52 mm 52 mm 1000 units 2000 units 5000 units 5000 units ±1 0.... 8.... - 7.... 6.... ±5 36... 13... 43... 53... 23... ± 10 - 12... 42... 52... 22... PART NUMBER PART NUMBER: VR25000001503JA100 V R 2 5 0 0 0 0 0 1 5 0 3 J A 1 0 0 MODEL/SIZE SPECIAL CHARACTER TC/MATERIAL VALUE TOLERANCE PACKING1) SPECIAL VR25000 0 = neutral Z = value overflow (Special) 0 = standard 3 digit value 1 digit multiplier Multiplier: 3 = *103 4 = *104 5 = *105 F=±1% J=±5% K = ± 10 % A5 A2 A1 R5 N4 The 2 digits are used for all special parts. 00 = standard PRODUCT DESCRIPTION: VR25 5 % A1 150K 1) VR25 5% A1 150K MODEL/SIZE VR25 TOLERANCE ±1% ±5% ± 10 % PACKING1) A1 A5 RESISTANCE VALUE 47K = 47 KΩ 50R1 = 50.1 Ω Please refer to table PACKING. Note Products can be ordererd using either the 12NC or the PART NUMBER. The PART NUMBER is shown to facilitate the introduction of a unified part numbering system. Currently, this PART NUMBER is applicable in the Americas only. PACKING CODE PIECES DESCRIPTION A5 5000 Bandolier in ammopack straight leads 52 mm A2 2000 Bandolier in ammopack straight leads 26 mm A1 1000 Bandolier in ammopack straight leads 52 mm R5 5000 Bandolier on reel straight leads 52 mm N4 4000 Bandolier in ammopack radial taped Document Number: 28732 Revision: 06-Dec-05 For technical questions contact: [email protected] MODEL/SIZE VR25 www.vishay.com 169 VR25 Vishay BCcomponents High Ohmic/High Voltage Resistors DIMENSIONS L1 ∅d ∅D L2 Outline DIMENSIONS - resistor type and relevant physical dimensions TYPE ∅D MAX. L1 MAX. L2 MAX. ∅d VR25 2.5 6.5 7.5 0.58 ± 0.05 Yellow and grey are used instead of gold and silver because metal particles in the lacquer could affect high-voltage properties. MASS PER 100 UNITS TYPE MASS (g) VR25 52 mm 21.2 OUTLINES VR25 26 mm 14.8 The length of the body (L1) is measured by inserting the leads into holes of two identical gauge plates and moving these plates parallel to each other until the resistor body is clamped without deformation (“IEC publication 60294”). MARKING The nominal resistance and tolerance are marked on the resistor using four or five colored bands in accordance with IEC publication 60062 “Color codes for fixed resistors”. FUNCTIONAL PERFORMANCE PRODUCT CHARACTERIZATION Standard values of nominal resistance are taken from the E96/E24/E12 series for resistors with a tolerance of ± 1 %, 5 % or 10 %. The values of the E96/E24/E12 series are in accordance with “IEC publication 60063”. LIMITING VALUES LIMITING VOLTAGE1) (V) TYPE VR25 DC RMS 1600 1150 LIMITING POWER (W) 0.25 Note 1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”. The maximum permissible hot-spot temperature is 155 °C. www.vishay.com 170 For technical questions contact: [email protected] Document Number: 28732 Revision: 06-Dec-05 VR25 Vishay BCcomponents High Ohmic/High Voltage Resistors The power that the resistor can dissipate depends on the operating temperature. 20 ^ Pmax (%Prated) Vmax (kV) 100 10 8 50 6 0 - 55 0 50 70 100 155 Tamb (°C) Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb) 4 10-2 1 10 102 Rn (MΩ) Maximum allowed peak pulse voltage in accordance with “IEC 60065 chapter 14.1”; 50 discharges from a 1 nF capacitor charged to V max ; 12 discharges/minute (drift ∆R/R ≤ 2 %) Pulse Loading Capability Derating 100 50 ∆T (K) ∆T (K) 80 40 60 30 40 20 20 10 0 10-1 5 mm 10 mm 15 mm 0 0 0.1 0.2 P (W) 0.3 Hot-spot temperature rise (∆T) as a function of dissipated power 0 0.1 0.2 P (W) 0.3 Temperature rise (∆T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting Application Information Document Number: 28732 Revision: 06-Dec-05 For technical questions contact: [email protected] www.vishay.com 171 VR25 Vishay BCcomponents High Ohmic/High Voltage Resistors TESTS AND REQUIREMENTS Essentially all tests are carried out in accordance with the schedule of “IEC publication 60115-1”, category LCT/UCT/56 (rated temperature range: Lower Category Temperature, Upper Category Temperature; damp heat, long term, 56 days). The testing also covers the requirements specified by EIA and EIAJ. The tests are carried out in accordance with IEC publication 60068-2, “Recommended basic climatic and mechanical robustness testing procedure for electronic components” and under standard atmospheric conditions according to “IEC 60068-1”, subclause 5.3. In the Test Procedures and Requirements table the tests and requirements are listed with reference to the relevant clauses of “IEC publications 60115-1 and 60068-2”; a short description of the test procedure is also given. In some instances deviations from the IEC recommendations were necessary for our method of specifying. All soldering tests are performed with mildly activated flux. TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE IEC 60068-2 TEST METHOD 4.16 21 (U) robustness of terminations: 4.16.2 21 (Ua1) tensile all samples 4.16.3 21 (Ub) TEST bending half number PROCEDURE REQUIREMENTS ∅ 0.6 mm; load 10 N; 10 s number of failures < 10 × 10-6 ∅ 0.6 mm; load 5 N; 4 × 90° number of failures < 10 × 10-6 3 × 360° in opposite directions no damage of samples 4.16.4 21 (Uc) torsion other half 4.17 20 (Ta) solderability 2 s; 235 °C good tinning; no damage 4.18 20 (Tb) resistance to thermal shock: 3 s; 350 °C; ∆R/R max.: ± 0.5 % + 0.05 Ω ∆R/R max.: ± 0.5 % + 0.05 Ω of samples soldering heat 4.19 14 (Na) rapid change of temperature 3 mm from body 30 minutes at - 55 °C and ∆R/R max.: ± 0.5 % + 0.05 Ω 30 minutes at + 155 °C; 5 cycles 4.20 29 (Eb) bump 3 × 1500 bumps in 3 directions; 40 g no damage ∆R/R max.: ± 0.5 % + 0.05 Ω 4.22 6 (Fc) vibration frequency 10 to 500 Hz; displacement no damage 1.5 mm or acceleration 10 g; 3 directions; ∆R/R max.: ± 0.5 % + 0.05 Ω total 6 hours (3 × 2 hours) www.vishay.com 172 For technical questions contact: [email protected] Document Number: 28732 Revision: 06-Dec-05 VR25 High Ohmic/High Voltage Resistors Vishay BCcomponents TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE IEC 60068-2 TEST METHOD 4.23 TEST PROCEDURE REQUIREMENTS climatic sequence: 16 hours; 155 °C 4.23.2 2 (Ba) dry heat 4.23.3 30 (Db) damp heat (accelerated) 1st cycle 4.23.4 1 (Aa) cold 4.23.5 13 (M) low air pressure 4.23.6 30 (Db) damp heat (accelerated) remaining cycles 5 days; 55 °C; 95 to 100 % RH Rins min.: 103 MΩ ∆R/R max.: ± 1.5 % + 0.1 Ω 4.24.2 3 (Ca) damp heat (steady state) 56 days; 40 °C; 90 to 95 % RH; dissipation 0.01 Pn; limiting voltage 100 V (DC) ∆R/R max.: ± 1.5 % + 0.1 Ω 4.25.1 endurance 1000 hours at 70 °C; Pn or Vmax ∆R/R max.: ± 1.5 % + 0.1 Ω 4.8.4 temperature coefficient between - 55 °C and + 155 °C (TC × 10-6/K) ≤ ± 200 4.7 voltage proof on insulation 700 V (RMS) during 1 minute; V-block method no breakdown 4.12 noise “IEC publication 60195” max. 5 µV/V 4.6.1.1 insulation resistance 500 V (DC) during 1 minute; V-block method Rins min.: 104 MΩ 4.13 short time overload room temperature; dissipation 6.25 × Pn (voltage not more than 2 × limiting voltage); 10 cycles; 5 s on and 45 s off ∆R/R max.: ± 2.0 % + 0.05 Ω 4.26 active flammability “Cheese-cloth test” steps of: 5/10/16/25/40 × Pn (RMS) duration 5 minutes no flaming of gauze cylinder application of test flame for 20 s no ignition of product; no ignition of under-layer; burning time less than 30 s 24 hours; 55 °C; 90 to 100 % RH 2 hours; - 55 °C 2 hours; 8.5 kPa; 15 to 35 °C OTHER TEST IN ACCORDANCE WITH IEC 60695 2.2 Document Number: 28732 Revision: 06-Dec-05 passive flammability “Needle-flame test” For technical questions contact: [email protected] www.vishay.com 173 Legal Disclaimer Notice Vishay Notice Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Vishay for any damages resulting from such improper use or sale. Document Number: 91000 Revision: 08-Apr-05 www.vishay.com 1