High Value Surface High Value Value Surface Surface Mounted Resistors Mounted Resistors Resistors Mounted Welwyn Components Welwyn Components HR Series HR Series HR Series s Custom / sizes available Custom designsdesigns / sizes available s Custom designs / sizes s Resistance to ohms 50G available ohms Resistance rangerange to 50G s Resistance range to 50G ohms Terminations available for wire or soldering s Terminations available for bonding wire bonding · · · available for bonding or soldering ·s Terminations Low voltage coefficient of wire resistance s or soldering s Low voltage coefficient of resistance Low voltage coefficient of resistance Electrical Data Electrical Data Power Rating The high resistance value of these devices is such that power dissipation is always small. The rating is therefore determined by Power Rating voltage considerations only, devices as shown in thethat table below. The high resistance value of these is such power dissipation is always small. The rating is therefore determined by voltage considerations only, as shown in the table below. 0503 Resistance range* ohms 0503 10M to 20G voltage ohms ResistanLimiting ce rangeelement * TCR Resistance tolerance °C 50 °Cppm/°C % 100 150 100M to 50G 0-5to5 -t2o0+00155 >500M : 25, 50 10M to 500M:10 Notes 200 0 to -1500 100M to 1G:5,10 Measured at 10 volts Notes 200 Measured at 10 volts -55 to + 155 150 100 0 to -2500 1206 100M to 50G 1206 1005 % toto 1G:5,10 0 to 10M -2500to 500M:10 0 to -2000 100M 0 -1500 ppm/°C Resistance tolerance 1005 0805 volts 10M to 20G 50 mbient tvoltage emperature rangvolts e LimitingAelement AmbienTt CteRmperature range 0805 0 to -1000 > 1G 0toto50G:25, -1000 50 Measured at 10 volts Measured at 10 volts > 1G to 50G:25, 50 : 25, *Higher values available, consult>500M factory for50 details *Higher values available, consult factory for details Physical Data Physical Data Dimensions (mm) & Weight (g) Wrap around Dimensions (mm) & Weight (g) Style L W T max. Wrap around A Style 0503 L 1.25 ± 0.2W 0.63 ± 0.15 T max. 0.5 0503 0805 2.0 ±0.63 0.3 ± 0.15 1.25 ± 0.2 1.25 ± 0.2 0.5 0.6 A Not available B † 0.3 ± 0.15 Not available 0805 1005 2.5 ±1.25 0.3 ± 0.2 1.25 ± 0.2 2.0 ± 0.3 0.6 0.7 0.3 ± 0.15 1005 1206 3.2 ±1.25 0.4 ± 0.2 1.6 ± 0.20.7 2.5 ± 0.3 0.7 Planar B† Planar C C 0.2 ± 0.1Wt Wt T 0.005 B L A 0.9min 0.3 ± 0.1 0.2 ± 0.1 0.005 0.009 B L A T W 1.7min 0.4 ± 0.15 0.4 ± 0.15 0.015 C C Wrap-around terminations (3 faces) W A terminations Not available 0.3 ± 0.1 0.4 ± 0.15 0.9min 0.009 0.015Wrap-around styles for (3Alternative faces) ± 0.2 Not0.4 available C A surface mounting 0.020 Alternativeresistors styles for surface mounting resistors L L T C T W Planar terminations W Planar terminations 1206 †This3.2 ± 0.4 1.6 ± 0.2 0.7number0.4 0.2 1.7min 0.4 ±pass 0.15under 0.020 dimension determines the of ±conductors which may the surface mounted device. This dimension determines the number of conductors which may pass under the surface mounted device. † Construction Terminations The resistor material is screen printed onto a 96% alumina Terminations Planar (or single-sided) termination is gold and suitable for Construction substrate and is covered a protection comprising around isis suitable soldering. The resistor material screen with printed onto a 96% alumina of a glaze Planar wire-bonding; (or single-sided)wrap termination gold andforsuitable for followed by an organic coating. This construction gives an wire-bonding; wrap around is suitable for soldering. substrate and covered with a protection comprising of a glaze insulated device. coating. This construction gives an Solderability followed by an organic Wrap-around terminations on HR resistors have good ‘leach’ insulated device. Solderability resistance properties.on They withstand immersion Marking Wrap-around terminations HR will resistors have good ‘leach’in solder at 260°C for 30They seconds. All relevant information is recorded on the primary packageresistance properties. will withstand immersion in solder Marking or reel. at 260°C for 30 seconds. All relevant information is recorded on the primary package or reel. General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of Welwyn Components reserves the right to make changes in product specification without notice or liability. TT electronics plc TT electronics reserves the right to make changes in product specification without notice or liability. A subsidiary of All information is subject to Welwyn’s own data and is considered accurate at time of going to print. © Welwyn Limited · Bedlington, Northumberland NE22 7AA, UK All information is subject Components to TT electronics’ own data and is considered accurate at time of going to print. TT electronics plc B · 03.02 www.bitechnologies.com Issue Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com www.irctt.com www.welwyn-tt.com © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Issue B · 03.02 Telephone: +44 (0) 1670 © TT electronics plc822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 20 GeneralAllNote Note General information is subject to Welwyn’s own data and is considered accurate at time of going to print. 20 11. 11 High Surface HighValue Value Surface Mounted Resistors Mounted Resistors Welwyn Components HR HR Series Series Performance Data Maximum Typical Load at rated power: 1000 hours at 70°C ∆ R% 2 1 Overload ∆ R% 1 0.2 Shelf life: 12 months at room temperature ∆ R% 2 1 Temperature rapid change ∆ R% 1 0.3 Change on Wave Soldering ∆ R% 1 Voltage proof volts 0503 : 100 Voltage coefficient of resistance (10V - 25V) %/V 0.5 0805 to 1206 : 500 0805 1 1005 0.8 0.4 0.3 1206 0.2 0.05 Application Notes Mounting Packaging This chip resistor is ideally suited for handling by automatic methods due to its rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by wire bonding to planar terminations or by reflow soldering of wrap-around terminations. The ‘F’ terminations provide good leach properties and ensure reliable contact. Due to the robust construction the resistor chip 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 and wireleaded components on the other side. The resistor must be kept dry during use to avoid leakage. The presence of moisture will not damage the resistor in any way. Resistor chips are supplied taped and reeled on standard 8mm tape to IEC 286-3. Quantity per reel 3000 max. Planar Terminations Resistor chips are supplied in waffle packs. Ordering Procedure Example: HR1206 with solderable wraparound terminations at 10 gigohms and 50% tolerance on a reel of up to 3000 pieces HR1206F– 10GYI Type Size Termination F G Solderable wraparound Gold pad planar 0805, 1206 only All sizes Value (use IEC62 code) Tolerance (use IEC62 code) J K 5% 10% 5 Y Packing I Tape Waffle 25% 50% 0805F, 1206F G Termination Up to 3000/reel Standard General Note © electronics Welwynreserves Components Bedlington, Northumberland NE22 7AA, UKor liability. TT the right toLimited make changes in product specification without notice Issue B · 03.02 Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 11. 11 21