LCA... STANDARD ELECTRICAL SPECIFICATIONS FEATURES Securely bonded carbon film Good moisture resistance (ΔR max ±.5 % R) Good long term stability (ΔR max ±.5 % R, for h) 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 22/95/EC (issue 24) Low Noise (refer to graph) Suitable for general purpose commercial electronics and pulse load applications MODEL SIZE POWER RATING P 7 C W LIMITING ELEMENT VOLTAGE MAX. V TOLERANCE ± % RESISTANCE RANGE Ω E-SERIES LCA24 24.25 2 R - 47K R - M LCA27 27.35 3 R - M R22-5M LCA4 4.55 5 R - M R22 - M LCA44 44.6 5 R - M R22 - M Notes Coating: Beige Marking: color code TECHNICAL SPECIFICATIONS PARAMETER UNIT LCA24 LCA27 LCA4 LCA44 Rated Dissipation at 7 C W.25.35.55.6 Limiting Element Voltage ) V 2 3 5 5 Limiting Voltage, short-time V 5 7 Insulation Voltage ( min) V- > 3 > 7 > 7 > 7 Thermal Resistance K/W 3 22 5 4 Insulation Resistance Ω /h Terminal Strength, axial N > 3 > 5 > 6 > 8 Category Temperature Range C - 55 to + 55 Failure Rate -9 /h < Weight g..2.5.68 Note. Rated Voltage P R www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 235 88 Revision: 2-Jan-7
LCA... PART NUMBER AND PRODUCT DESCRIPTION LCA-SERIES PART NUMBER: LCA24J25 L C A 2 4 2 4 J 2 5 MODEL/SIZE SPECIAL CHARACTER TCR VALUE TOLERANCE PACKAGING SPECIAL LCA24 LCA27 LCA4 LCA44 = neutral = neutral see diagram 3 digit value digit multiplier MULTIPLIER 7 = * -3 8 = * -2 9 = * - = * = * 2 = * 2 3 = * 3 4 = * 4 5 = * 5 6 = * 6 G = % J = % 2 = A2(G26) 22 = A2(G53) 25 = A5 2 = A(G53) 4 = A(G73) D5 = R5 DE = RE F2 = R2 PRODUCT DESCRIPTION: LCA24 2K4 5 % A5 LCA24 2K4 5 % A5 MODEL RESISTANCE VALUE TOLERANCE PACKAGING ) LCA24 LCA27 LCA4 LCA44 ) Please refer to table PACKAGING. 22K = 22 kω R = Ω % % A2 (G26) A2 (G53) A5 A (G53) A (G73) R5 RE R2 up to 2 digits = standard Note: The PART NUMBER shown above is to facilitate the unified part numbering system for ordering products. PACKAGING REEL BOX MODEL PIECES/REEL CODE MIN. ORDER QTY PACKAGING UNITS PIECES/BOX CODE MIN. ORDER QTY PACKAGING UNITS LCA24 5 R5 5 2 A5 A2 LCA27 5 R5 5 2 A5 A2 LCA4 25 RE A LCA44 2 R2 A Document Number: 235 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com Revision: 2-Jan-7 89
LCA... DIMENSIONS 6 mm* MODEL L D L d DIMENSIONS [in millimeters] D max L L B d e LCA24.6 -.3 3.6 -.4 5. 53 ±.5 5. e B ) Also available in 26 mm tape spacing 2) Also available in 73 mm tape spacing Taping in acc. with IEC6286- D and L measured in acc. with IEC6294 d according to IEC63 LCA27 2.4 -.3 6. -.5 8. 53 ± ).6 7.5 LCA4 3.7 -.4.5 -.6 2.5 53 ± 2).7 2.5 LCA44 4.2 -.5 2.2 -.7 4.2 53 ± 2).8 5. % RATED POWER 2 8 6 4 2 TEMPERATURE RISE IN C 3 2 24 27 4 44-55 - 25 25 5 75 25 55 75 2 7 AMBIENT TEMP. IN C DERATING.5..5 2. 2.5 POWER IN W TEMPERATURE RISE NON-LINEARITY A 3 in db 2 9 8 7 6 NON-LINEARITY 4/44 27 24 K K K M M RESISTANCE VALUE [Ω] CURRENT NOISE (µv/v) 5 3 2.5.3.2..5.3.2. K K CURRENT NOISE K 24 27 4/44 M M RESISTANCE VALUE [Ω] www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 235 9 Revision: 2-Jan-7
I I LCA... -6 T EMPERATURE COEFFICIENT [ / C ] - 2-4 - 6-8 - 4/44 27 24-2 K K K M M TEMPERATURE COEFFICIENT (mean value) between - 25... + 25 C deviation 5 % R ESISTANCE CHANGE R/R [% ] 3 2 - - 2 K K K M M RESISTANCE VALUE [Ω] ENDURANCE at upper category temperature, 55 C h STABILITY NOMOGRAM, TYPICAL VALUES (For handling see General Information) ϑ ü = f [P] PARAMETER: SIZE 44 4 27 24 2.2 2..8.6.4.2..8.6.4.2 LOAD P [W] 4 2 8 6 4 2 T E M P E R A T U R E R S E ϑ ü [ C ] 4 2 8 6 4 2 ϑ ü = f [ϑs] PARAMETER: ϑ u ϑ u = 2 C 4 C 6 C 8 C C 2 C 4 C 2 4 6 8 2 4 6 8 FILM TEMPERATURE ϑ s [ C] R/R (t) = f [ R/R (t = h)] PARAMETER: TIME t = h h 5 h 2 h h 3 3.3. RESISTANCE CHANGE R/R [%]..5 5 R E S S T A N C E C H A N G E R/ R [ % ] a f t e r h..5 5 R/R [t = h] = f [ϑs] PARAMETER: RESISTANCE VALUE R-K K K M 2 4 6 8 2 4 6 8 FILM TEMPERATURE ϑ s [ C] Document Number: 235 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com Revision: 2-Jan-7 9
LCA... POWER RATING P [W] 44 4 27 24 POWER RATING P [W] 44 4 27 24 Secondary conditions: a) P ϑ b) ϑ u 7 C c) R Ω d) Û max see diagram below. -5-4 PULSE RATING P SQUARE PULSE ti (s) Secondary conditions: a) P P 7 (permissible constant power at ϑ u = 7 C) b) ϑu 7 C c) R Ω d) Û max see diagram below left. -3-2 - -5-4 -3-2 - PULSE RATING P P7 SQUARE PULSE ti (s) PULSE VOLTAGE Ü MAX [V] 2 4/44 27 24 IMPEDANCE K K Ω K K Ω Secondary conditions: a) P max see diagram below b) ϑu 7 C -5-4 -3-2 - - SQUARE PULSE ti (s) MAX PULSE VOLTAGE Ω Ω FREQUENCY IN MHz HF CHARACTERISTICS LCA27 PERFORMANCE CHARACTERISTICS TEST CONDITIONS OF TEST REQUIREMENTS ) Endurance Test at 7 C IEC 65-4.25. Endurance at UCT IEC 65-4.25.3 Overload Test IEC 65-4.3 Thermal Shock IEC 65-4.9, IEC 668-2-4 Climatic Sequence IEC 65-4.23 Damp Heat Steady State IEC 65 4., IEC 668-2-3 Resistance to Soldering Heat IEC 65-4.8, IEC 668-2-2 Robustness of Terminations IEC 65-4.6, IEC 668-2-2 Vibration IEC 65-4.22, IEC 668-2-6 Note. For ohmic values between Ω and MΩ APPLICABLE SPECIFICATIONS CECC 4/4/4 EN 4/4 hours at 7 C,.5 hours ON,.5 hours OFF 8 hours at 7 C,.5. hours ON,.5 hours OFF hours at 55 C without load 8 hours at 55 C without load 2.5 x rated power or twice the limiting element voltage, 2 seconds for sizes 27; 5 seconds for sizes 39 ±.5 % ± 4. % ± 3. % ± 8. % ±.5 % Rapid change between upper and lower category temperature ±.25 % Dry heat, damp heat cyclic, cold, low air pressure ±.5 % 56 days at 4 C, 93 % realtive humidity ±.5 % seconds at 26 C solder bath temperature ±.25 % Tensile, bending and torsion ±.25 %.75 mm or g Hz - 5 Hz 6 hours ±.25 % www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 235 92 Revision: 2-Jan-7
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