MELF Coated Thin Film Precision Resistors (MELFC Series)

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Audrey Wilkins
5 years ago
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1 Features: Precision TCR of 0, 5, 25 & 50ppm/ C High reliability and stability of ±0. and ±0.5% Excellent pulse load capability Strong mechanical body due to cylindrical shape AEC-Q200 compliant RoHS and REACH compliant and halogen-free Part Number Structure MELF C - V E B T Series Size Power Rating TCR Resistance Value Resistance Tolerance Packaging MELF C 002 R = 0.25W U = 0.33W T = 0.25W Z = 0.40W V = 0.50W X =.0W N = 0ppm/ C Z = 5ppm/ C E = 25ppm/ C C = 50ppm/ C K = 00ppm/ C 49R9 = 49.9Ω 000 = 00Ω 00 = KΩ 003 = 00KΩ B = ± 0.0% C = ± 0.25% D = ± 0.50% F = ± % T = Tape & Reel Example P/N: MELFC-VE-002BT Standard temination finish is 00% matte Tin (Sn) over Nickel. Dimensions Size L D C Unit: inches (mm) ± (2.20 ± 0.0) ± (.0 ± 0.0) 0.08 ± (0.45 ± 0.05) C L C D 0.37 ± (3.50 ± 0.0) ± (5.90 ± 0.20) ± (.40 ± 0.5) ± (2.20 ± 0.0) ± (0.90 ± 0.0) ± (.40 ± 0.0) Structure Protective insulation 2 Termination 3 End Cap Later trimmed resistance rod 4 Alumina ceramic rod Epoxy Coating 2 00% Matte Tin (Sn) over Nickel (Ni) 3 End Cap 4 Alumina (AL2O3) 5 Nickel Chromium (NiCr) Color code rings for resistance value (see Chart) 5 Resistive element sales@venkel.com Phone: Toll Free: Web:

2 Electrical Specifications and Range Size (mm) 002 Power Rating at 70 C (W) 0.25W (/8W) 0.20W (/5W) 0.33W (/3W) 0.25W (/4W) NOTE: Max Working Voltage is listed above or (P*R), whichever is lower. Max Overload Voltage is listed above or 2.5* (P*R), whichever is lower. This is the maximum voltage that may be continuously supplied to the resistor element. see IEC publication W (2/5W) 0.50W (/2W) Max. Working Voltage (DC or rms) 50V 200V 200V 200V 300V 350V Max. Overload Voltage (DC or rms) 300V 400V 400V 400V 600V 700V Operating Temp. Range -55 C to +55 C Tolerance TCR --- Resistance Range --- ±0.0% ±0.25% ±0.50% ±% Derating Curve Rated power (%) ±0ppm Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ ±5ppm 00Ω - 56KΩ 00Ω - 56KΩ Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ ±25ppm 00Ω - 82KΩ - - 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ ±50ppm Ω - MΩ 0Ω - MΩ 0.2Ω - MΩ 0.2Ω - MΩ ±00ppm ±0ppm Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ ±5ppm 00Ω - 56KΩ 00Ω - 56KΩ Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ ±25ppm 00Ω - 82KΩ 00Ω - 82KΩ - 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ ±50ppm Ω - MΩ 0Ω - MΩ 0.2Ω - MΩ 0.2Ω - MΩ ±00ppm ±0ppm Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ ±5ppm 00Ω - 56KΩ 00Ω - 56KΩ Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ ±25ppm 49.9Ω - 200KΩ 49.9Ω - 200KΩ - 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ ±50ppm 8.2Ω - MΩ 8.2Ω - MΩ 8.2Ω - MΩ 0.2Ω - MΩ 0Ω - MΩ 0.2Ω - MΩ 0.2Ω - MΩ ±00ppm ±0ppm Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ 49.9Ω - 25KΩ ±5ppm 00Ω - 56KΩ 00Ω - 56KΩ Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ 49.9Ω - 250KΩ ±25ppm 49.9Ω - 390KΩ 49.9Ω - 390KΩ - 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ 0Ω - MΩ ±50ppm 8.2Ω - MΩ 8.2Ω - MΩ 8.2Ω - MΩ 0.2Ω - MΩ 0Ω - MΩ 0.2Ω - MΩ 0.2Ω - MΩ ±00ppm 43Ω - MΩ 43Ω - MΩ 43Ω - MΩ 0.Ω - MΩ 0.Ω - MΩ 0.Ω - MΩ 0.Ω - MΩ Zero Ohm Jumper is also available (<5mΩ). Zero Ohm Current ratings are : 002 = 2A, = 2A, = 4A Ambient temperature ( C).0W Recommended Land Pattern 002 Unit: mm A (mm) B (mm) C (mm) sales@venkel.com Phone: Toll Free: Web:

3 Marking codes for resistance values Example: Standard Resistance Values ±% ±0.5% ±0.25% ±0.% E Color Coding Color 2 Coding Color 3 Coding Color 4 Coding Resistance values more than two digits (<Ω) or more than three digits (>Ω) will not be marked. 3 sales@venkel.com Phone: Toll Free: Web:

4 Reel Specifications Size A B C D 002 Ø 78.0±2.0 Ø 60.0±.0 3.0± ±0.5 Ø 78.0±2.0 Ø 60.0±.0 3.0± ±0.5 C B A Ø 78.0±2.0 Ø 60.0±.0 3.0± ±0.5 Taping quantity per reel: D 3,000 pcs per reel (002) 3,000 pcs per reel () 2,000 pcs per reel () Tape Specifications Paper Tape specifications (unit :mm) P P0 X-X X ØD E A F W T X B Size A B W E F P0 P ØD T ±0.0.30± ±0.0.75± ± ± ±0.0.50± ± ±0.0.55± ±0.0.75± ± ± ±0.0.50± ±0. 6.5± ± ±0.0.75± ± ± ±0.0.50± ± sales@venkel.com Phone: Toll Free: Web:

5 Soldering Condition The robust construction of cylindrical resistors allows them to be completely immersed in a solder bath of 260 C for 0 seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete components on the reverse (mixed PCBs). Surface Mount Resistors are tested for solderability at 235 C during 2 seconds within lead-free solder bath. The test condition for no leaching is 260C for 30 seconds. Typical examples of soldering profile and condition that provide reliable solder joints without any damage are provided below: max. ramp up rate = 3 C/s max. ramp down rate = 6 C/s Temperature ( C) For SnAgCu series solder paste sec min sec sec 480 sec max. to peak Time Table : Infrared soldering condition for MELF Resistors Temperature Condition Average ramp-up rate (27 C to 260 C) Between 50 and 200 C Exposure Time <3 C/second Between seconds > 27 C Between seconds Peak Temperature 260ºC Time within 245 C Ramp-down rate (Peak to 27 C) Time from 25 C to Peak Min. 30 seconds 5 C/second No greater than 480 seconds 5 sales@venkel.com Phone: Toll Free: Web:

6 Environmental Test Criteria and Specifications Test Procedure Requirement Electrical Characteristics IEC DC resistance values measurement - Temperature Coefficient of Resistance (T.C.R) Natural resistance change per change in degree centigrade. R 2 R 2 x0 5 (ppc. C) t: 20 C+5 C- C R(t2 t) R : Resistance at reference temperature (20 C+5 C/- C) R2 : Resistance at test temperature (-55 C or +25 C) Refer to IEC605- for maximum allowable change and specifications Short time overload (S.T.O.L) IEC Resistance to soldering heat(r.s.h) MIL-STD-202 Method 20 Solderability IEC Temperature cycling JESD22 method JA-04 Permanent resistance change after a 5 second application of a voltage 2.5 times RCWV or the maximum overload voltage specified, whichever is less. Un-mounted chips completely immersed for 0±second in a SAC solder bath at 260 C ±5ºC Un-mounted chips completely immersed for 2±0.5 second in a SAC solder bath at 235 C ±5 Test 000 cycles (-55 C to +25 C ), dwell time 30min. maximum. Measurement at 24±4 hours after test conclusion ±(0.%+0.05Ω) ±(0.%+0.05Ω) no visible damage good tinning (>95% covered) no visible damage ±0.25%+0.05Ω no visible damage Biased Humidity MIL-STD-202 Method /-0 hours, loaded with 0% rated power in humidity chamber controller at +85 C /85%RH ±(0.30%+0.05Ω) Operational Life AEC Q200-8 MIL-STD hours at 70 ±2 C, loaded with continuous rated power ±(0.25%+0.05Ω) High Temperature Exposure MIL-STD-202 Method C, un-powered ±(0.25%+0.05Ω) Moisture Resistance AEC-Q200-6 MIL-STD-202 Method 06 65±2 C, 80~00% RH, 0 cycles, 24 hours/ cycle ±(0.25%+0.05Ω) Mechanical Shock MIL-STD-202 Method 23 /2 Sine Pulse / 00g Peak / Normal duration 6 ±(0.20%+0.05Ω) Vibration MIL-STD-202 Method g s for 20 min, 2 cycles each of 3 orientations ±(0.20%+0.05Ω) Terminal strength AEC-Q Apply.8 kg for 60 sec Not broken or peeling off Board flex AEC-Q Bending 2mm for 60 sec ±(0.20%+0.05Ω) 6 sales@venkel.com Phone: Toll Free: Web:

7 Pulse Load Performance for All Power Ratings [Single and Continous Pulse data is for ohmic values >0 Ohm] 000 MELFC 002 Single Pulse Pulse Power (W) Pulse Duration (sec) 50 rectangular pulse amplitudes are applied to the component at intervals of 60 seconds with allowable resistance variability or change of ±(0.5% R + 0.0Ω). 000 MELFC 002 Continuous Pulse Pulse Power (W) Pulse Duration (sec) Continuous load is a pulse period generated by the repetitive rectangular pulse amplitude, the applied power dissipation is at a rated power of 70 C. Allowable resistance variability or change is ±(0.5% R + 0.0Ω). 000 MELFC 002 Pulse Voltage Pulse Voltage (V) Duration (sec) 7 sales@venkel.com Phone: Toll Free: Web:

8 Pulse Load Performance for All Power Ratings 0000 MELFC 002.2/50µs Lightning Surge Pulse Voltage (V) Resistance (Ω) According to IEC 605-, 4.27;.2/50μs Testing Pulse shapes and parameters applies 5 pulses at 2 second intervals to test resistor performance with allowable resistance variability of ±(0.5% R + 0.0Ω) MELFC 002 0/700µs Lightning Surge Pulse Voltage (V) Resistance (Ω) According to IEC 605-, 4.27; 0/700μs Testing Pulse shapes and parameters applies 0 pulses at 60 second intervals to test resistor performance with allowable resistance variability of ±(0.5% R + 0.0Ω). 8 sales@venkel.com Phone: Toll Free: Web:

9 Pulse Load Performance for All Power Ratings [Single and Continous Pulse data is for ohmic values >0 Ohm] Single Pulse 000 Pulse Power (W) us 00us ms 0ms 00ms s 0s Pulse Duration (sec) 50 rectangular pulse amplitudes are applied to the component at intervals of 60 seconds with allowable resistance variability or change of ±(0.5% R + 0.0Ω). Continuous Pulse 000 Pulse Power (W) us 00us ms 0ms 00ms s 0s Pulse Duration (sec) Continuous load is a pulse period generated by the repetitive rectangular pulse amplitude, the applied power dissipation is at a rated power of 70 C. Allowable resistance variability or change is ±(0.5% R + 0.0Ω). Pulse Voltage Pulse Voltage (V) us 00us ms 0ms 00ms s 0s Pulse Duration (sec) 9 sales@venkel.com Phone: Toll Free: Web:

10 Pulse Load Performance for All Power Ratings.2/50us Pulse Voltage Pulse Voltage(V) K 0K 00K M Resistance (Ω) According to IEC 605-, 4.27;.2/50μs Testing Pulse shapes and parameters applies 5 pulses at 2 second intervals to test resistor performance with allowable resistance variability of ±(0.5% R + 0.0Ω). 0/700us Pulse Voltage Pulse Voltage(V) K 0K 00K M Resistance (Ω) According to IEC 605-, 4.27; 0/700μs Testing Pulse shapes and parameters applies 0 pulses at 60 second intervals to test resistor performance with allowable resistance variability of ±(0.5% R + 0.0Ω). 0 sales@venkel.com Phone: Toll Free: Web:

Surge Withstanding Thick FilmResistors(SWCR Series)

Surge Withstanding Thick FilmResistors(SWCR Series) Features: Excellent surge and pulse withstanding performance Higher power rating than General Purpose Thick Film Resistors Offered in to sizes RoHS &