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Precision Surface Mount Resistors
PCF Series
Precision metal film technology Extended ohmic range 1R - 2M Precision to 0.01% and 5ppm/C TCR grades 50, 25, 15, 10, 5ppm/C Passivated range for superior humidity performance Load life stability and humidity to 0.05%
Electrical Data - Standard Range
Type PCF0201 TCR (ppm/C
100 25 50 25 15 10 5 50 25 15 10 5 50 25 15 10 5 50 25 15 10 5 25 10 5 50 25 15 10 5 50 25 15 10 5
Power (W) 0.05
Limiting Element Voltage (V) 15
Ohmic Value Range *
0.5% 10R-30R (1%) 33R -22K 10R-200K 10R-200K 50R-12K 2R-800K 2R-800K 4R7-332K 1R-2M 1R-2M 4R7-500K 1R-2M 1R-2M 0.25% 0.1% 0.05% 0.01%
10R-200K 10R-200K 50R-12K 2R-800K 2R-800K 4R7-332K 1R-2M 1R-2M 4R7-500K 1R-2M 1R-2M 4R7-1M
PCF0402
0.063
25
PCF0603
0.063
75
PCF0805
0.1
100
PCF1206
0.125
150
4R7-1M 51R-2M 100R-330K 100R-200K 1R-2M 1R-2M 4R7-1M 1R-2M 1R-2M 4R7-1M
PCF1210
0.25
200
1R-2M 1R-2M 4R7-1M 1R-2M 1R-2M 4R7-1M
PCF2010
0.25
150
PCF2512
0.5
150
10R-200K 10R-200K 50R-12K 50R-12K 50R-2K 4R7-800K 4R7-800K 4R7-332K 4R7-332K 50R-4K 4R7-2M 4R7-2M 4R7-1M 4R7-1M 50R-10K 4R7-1M 4R7-1M 4R7-1M 4R7-1M 50R-15K 51R-2M 100R-330K 100R-200K 4R7-1M 4R7-1M 4R7-1M 4R7-1M 25R-25K 4R7-1M 4R7-1M 4R7-1M 4R7-1M 25R-25K
50R-12K 50R-12K 50R-12K 50R-2K 4R7-150K 4R7-150K 25R-100K 50R-4K 4R7-500K 4R7-500K 25R-200K 50R-10K 4R7-1M 4R7-1M 25R-500K 50R-15K
50R-12K 50R-12K 50R-12K 50R-12K 50R-2K 25R-100K 25R-100K 25R-100K 25R-100K 50R-4K 25R-200K 25R-200K 25R-200K 25R-200K 50R-10K 25R-500K 25R-500K 25R-500K 25R-500K 50R-15K
4R7-1M 4R7-1M 25R-500K 25R-25K 4R7-1M 4R7-1M 25R-500K 25R-25K
25R-500K 25R-500K 25R-500K 25R-500K 25R-25K 25R-500K 25R-500K 25R-500K 25R-500K 25R-25K
* Standard values E24 or E96. Other values may be available by request.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print.
(c) Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
A subsidiary of TT electronics plc Issue J . 03.07
Precision Surface Mount Resistors
PCF Series
Electrical Data - High Power Range
Type
PCF0603H PCF0805H PCF1206H
TCR (ppm/C
50 25 50 25 50 25
Power (W)
0.1 0.125 0.25
Limiting Element Voltage (V)
50 150 200
Ohmic Value Range *
0.5% 10R-332K 10R-332K 4R7-1M 4R7-1M 4R7-1M 4R7-1M 0.25% 10R-332K 10R-332K 4R7-1M 4R7-1M 4R7-1M 4R7-1M 0.1% 10R-332K 10R-332K 4R7-1M 4R7-1M 4R7-1M 4R7-1M
* Standard values E24 or E96. Other values may be available by request.
Electrical Data - Passivated Range
Type
PCF0402P PCF0603P PCF0805P PCF1206P PCF2010P PCF2512P
TCR (ppm/C
50 25 50 25 50 25 50 25 50 25 50 25
Power (W)
0.063 0.063 0.1 0.125 0.25 0.5
Limiting Element Voltage (V)
25 50 100 150 150 150
Ohmic Value Range *
0.5% 25R-25K 25R-25K 25R-200K 25R-200K 25R-400K 25R-400K 25R-500K 25R-500K 25R-600K 25R-600K 25R-600K 25R-600K 0.25% 25R-25K 25R-25K 25R-200K 25R-200K 25R-400K 25R-400K 25R-500K 25R-500K 25R-600K 25R-600K 25R-600K 25R-600K 0.1% 25R-25K 25R-25K 25R-200K 25R-200K 25R-400K 25R-400K 25R-500K 25R-500K 25R-600K 25R-600K 25R-600K 25R-600K
* Standard values E24 or E96. Other values may be available by request.
Physical Data
Dimensions (mm) 0201 0402 0603 0805 1206 1210 2010 2512 L 0.6 0.05 1.0 0.05 1.6 0.2 2.0 0.2 3.2 0.2 3.2 0.2 4.9 0.2 6.3 0.2 W 0.3 0.05 0.5 0.05 0.8 0.2 1.25 0.2 1.6 0.2 2.6 0.2 2.4 0.2 3.1 0.2 Tmax 0.26 0.40 0.55 0.65 0.65 0.50 0.65 0.65 A 0.12 0.05 0.2 0.1 0.3 0.2 0.4 0.2 0.5 0.2 0.45 0.2 0.5 0.2 0.5 0.2 C 0.12 0.05 0.2 0.1 0.3 0.2 0.4 0.2 0.5 0.2 0.5 0.2 0.6 0.2 0.6 0.2 C T A L A W
Wrap-around terminations (3 faces)
Construction A thin-film material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor. The unadjusted resistors are heat treated to give the required TCR and stability, then a precisely controlled laser trim process adjusts the resistance value. Epoxy protection is applied and wrap-around terminations are added and plated with Nickel then Tin. Each resistor is measured immediately before packing into tape. Terminations The chips are supplied with 100% Sn matte plated wrap-around terminations suitable for soldering.
(c) Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Issue J . 03.07
Precision Surface Mount Resistors
PCF Series
Performance Data - Standard Range
Test Parameters Conditions Maximum change (+0.05R)
0.05% tolerance Chip size 0.01% tolerance 0603 to 2512 0603 to 2512 0402 & 2010? 0.25% 0.5% 0.05% 0.3% 0.05% 0.3% 0.05% 0.5% 0.5% 0.25% 0.25% 0.25% 0.05% 0.1% 0.1% 0.05% 0.2% 0.2% 95% minimum coverage Load life Humidity Short term overload High temperature operation Temperature cycle Resistance to solder heat Solderability 1000 hours rated load @ 70C 1000 hours @ 40C, 90 - 95%RH 6.25 x rated Power , or 2 x LEV, for 5 sec 1000 hours at 125C 5 cycles -55 C, 125C 270C, 10 sec 235C, 2 sec
Performance Data - High Power Range
Test Parameters
Load life Humidity Short term overload High temperature operation Temperature cycle Resistance to solder heat Solderability
Conditions
1000 hours rated load @ 70C 1000hrs @ 40C, 90 - 95%RH 6.25 x rated Power, or 2 x LEV, for 5 sec 1000 hours at 155C 5 cycles -55C, 125C 270C, 10 sec 235C, 2 sec
Maximum change (+0.05R)
0.5% 0.5% 0.5% 0.5% 0.25% 0.2% 95% minimum coverage
Performance Data - Passivated Range
Test Parameters
Load life Humidity Short term overload High temperature operation Temperature cycle Resistance to solder heat Solderability
Conditions
1000 hours rated load @ 70C 1000hrs @ 40C, 90 - 95%RH 6.25 x rated Power, or 2 x LEV, for 5 sec 1000 hours at 125C 5 cycles -55 C, 125C 270C, 10 sec 235C, 2 sec
Maximum change (+0.05R)
0603 to 2512 0.05% 0.05% 0.02% 0.05% 0.02% 0.02% 0402 0.25% 0.5% 0.1% 0.5% 0.1% 0.1%
95% minimum coverage
Solderability The terminations have an electroplated nickel barrier and tin coating. This ensures excellent 'leach' resistance properties and solderability. Packaging PCF Resistors are supplied taped and reeled as per IEC 286-3. Application Notes PCF resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow or wave soldering of wrap-around terminations.
(c) Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Issue J . 03.07
Precision Surface Mount Resistors
PCF Series
Wrap-around terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the PCF can be immersed in the solder bath for 30 seconds at 260 C. This enables the resistor to be mounted on one side of a printed circuit board and wire-leaded components applied on the other side. PCF resistors themselves can operate at a maximum temperature of 125 C (see performance above) (155 C for High Power grades). For soldered resistors, the joint temperature should not exceed 110 C. This condition is met when the stated power levels at 70 C are used.
Ordering Procedure
PCF 0603 P - 11 - 1K54 B I
Type Size Range
Standard H P High Power Passivated
TCR
13 12 11 5ppm/C 10ppm/C 15ppm/C R 2 25ppm/ C 50ppm/ C
Resistance value (IEC62 Code) Tolerance
L W B 0.01% 0.05% 0.1% C D 0.25% 0.5%
Packing
0201 0402 I 0603, 0805, 1206, 1210 2010, 2512 T1 0402, 0603, 0805, 1206, 2010, 2512 50,000/reel 10,000/reel 5000/reel 4000/reel 1000/reel Please enquire to confirm availability of 1000 piece reels Standard
(c) Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Issue J . 03.07

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