WK73S2ATTDR100F KOA Speer Resistor (Resistor Chip) In Stock
KOA Speer WK73S2ATTDR100F is a 100 mOhm current sense chip resistor in a 0402 (1.25 mm x 2 mm) SMT package with 1% tolerance, ideal for precision current measurement on dense PCBs.
- Manufacturer
- KOA Speer
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- WK73S2ATTDR100F 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
- 100 mOhm low resistance value with 1% tolerance for precise current sensing in power management and motor control circuits
- Compact 0402-size chip package (1.25 mm x 2 mm x 0.55 mm) enables high-density surface mount PCB layouts
- Tape and reel (7-inch punched paper) packaging supports automated pick-and-place assembly for high-volume SMT production
Applications
WK73S2ATTDR100F is used as a current sense resistor in DC-DC converters, battery management systems, and motor drive circuits where low 100 mOhm resistance and tight 1% tolerance enable accurate current measurement with minimal power loss. Its 0402 SMT chip package suits compact power modules and IoT devices requiring reliable current monitoring in space-constrained designs.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 12 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.55mm |
| Package Length | 1.25mm |
| Package Style | SMT |
| Package Width | 2mm |
| Packing Method | TR, PUNCHED PAPER, 7 INCH |
| Rated Power Dissipation (P) | 1W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 0.1Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0508 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 0,200 ppm/°C |
| Terminal Finish | TIN OVER NICKEL |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 0.3162V |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistance value and tolerance does WK73S2ATTDR100F offer for current sensing?
WK73S2ATTDR100F has a 100 mOhm resistance value with 1% tolerance, making it suitable for precision current sensing applications. At 1 A load current, the voltage drop across the resistor is 100 mV, providing a strong sense signal for current measurement ICs in DC-DC converters, battery monitors, and motor control designs while keeping power dissipation low.
What are the physical dimensions of WK73S2ATTDR100F and how do they affect PCB layout?
WK73S2ATTDR100F measures 1.25 mm in length, 2 mm in width, and 0.55 mm in height, corresponding to an 0402 chip resistor footprint. This compact size allows placement close to the current sense point in dense power supply PCBs, minimizing parasitic inductance and resistance in the sense path, which improves current measurement accuracy in high-frequency switching converter circuits.
How does the tape and reel packaging of WK73S2ATTDR100F support high-volume SMT assembly?
WK73S2ATTDR100F is supplied on a 7-inch punched paper tape and reel, compatible with standard SMT pick-and-place feeders. This packaging allows direct loading into automated assembly equipment without repackaging, supporting production rates typical of high-volume consumer electronics and industrial PCB manufacturing, while maintaining component orientation accuracy for the 0402 chip resistor pads.
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