RK73B2ATTD912J KOA Speer Resistor (Resistor Chip) In Stock
RK73B2ATTD912J is a KOA thick-film surface-mount resistor in an 0805 case with a 9.1 kΩ resistance value, ±5% tolerance, 0.25 W rated power, and ±200 ppm/°C temperature coefficient. It measures 2 mm x 0.5 mm and meets RoHS and REACH compliance requirements. Available in tape-and-reel packaging for automated PCB assembly with worldwide shipping.
- Manufacturer
- KOA Speer
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- RK73B2ATTD912J Datasheet PDF
- Category
- Resistor
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 9.1 kΩ thick-film resistor in compact 0805 (2 mm x 0.5 mm) surface-mount package for high-density PCBs
- 0.25 W power rating with ±5% tolerance suitable for general-purpose signal conditioning and biasing
- ±200 ppm/°C temperature coefficient ensuring stable resistance across typical -55°C to +155°C operating ranges
- RoHS and REACH compliant Pb-free construction for global regulatory compliance
Applications
The RK73B2ATTD912J is a general-purpose thick-film chip resistor well-suited for pull-up/pull-down networks, voltage dividers, and current limiting in consumer electronics, industrial control PCBs, and IoT sensor modules. Its 0805 footprint and 0.25 W rating accommodate automated SMT assembly lines at high placement speeds. The ±200 ppm/°C drift makes it appropriate for non-precision biasing applications where temperature variation from -55°C to +155°C is expected.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 12 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.5mm |
| Package Length | 2mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 1.25mm |
| Packing Method | TR, Punched Paper, 7 Inch |
| Rated Power Dissipation (P) | 0.25W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200, IEC60115-8 |
| Resistance | 9100Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0805 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 200ppm/°C |
| Terminal Finish | MATTE TIN OVER NICKEL |
| Terminal Shape | WRAPAROUND |
| Tolerance | 5% |
| Working Voltage | 150V |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
| Country of Origin | Japan, Mainland China, Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the ±200 ppm/°C temperature coefficient of the RK73B2ATTD912J affect resistance in a wide-temperature industrial design?
At ±200 ppm/°C, the RK73B2ATTD912J 9.1 kΩ resistor drifts by up to ±1.82 Ω per degree Celsius. Over a 100°C operating range from -40°C to +85°C, the total resistance shift can reach ±182 Ω, which is a 2% change on top of the ±5% initial tolerance. Designers should account for this in precision voltage divider or bias network calculations for industrial-grade circuits.
For a 3.3 V logic pull-up network, how much current does the RK73B2ATTD912J source when the line is pulled low?
With a 9.1 kΩ resistance and a 3.3 V pull-up supply, the RK73B2ATTD912J sources approximately 0.36 mA when the driven line is pulled to ground. Power dissipation in this state is about 1.2 mW, well within the 0.25 W (250 mW) rated limit, providing a large safety margin for standard I2C or GPIO pull-up applications.
When should an engineer select the 0805 package of the RK73B2ATTD912J over a smaller 0402 resistor for a PCB layout?
The 0805 package (2 mm x 1.25 mm) of the RK73B2ATTD912J is preferred over 0402 when manual rework or hand soldering is required, as its larger pad area and 0.5 mm height improve pick-and-place reliability at speeds below 30,000 CPH. It also handles 0.25 W power dissipation versus the typical 0.063 W of a 0402, making it suitable for resistors in higher-current bias paths of 5 mA or more.
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