RK73B1ELTP472J KOA Speer Resistor (Resistor Chip) In Stock
KOA Speer RK73B1ELTP472J is a thick-film SMD chip resistor with 4.7 kΩ resistance, 5% tolerance, and 1/16 W power rating in a compact 0402 package for high-density PCB assembly. Key specs: 4.7 kΩ, 5%, 0402 (1.0 mm x 0.35 mm). Available in stock with worldwide shipping.
- Manufacturer
- KOA Speer
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- RK73B1ELTP472J Datasheet PDF
- Category
- Resistor
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4.7 kΩ thick-film resistor with 5% tolerance for general-purpose signal conditioning
- Ultra-compact 0402 package measuring 1.0 mm x 0.5 mm enabling high-density SMD assembly
- 1/16 W (0.0625 W) power rating suitable for low-power signal-level circuits
- Rectangular SMT construction compatible with standard pick-and-place and reflow soldering
Applications
The RK73B1ELTP472J is used as a pull-up or pull-down resistor, current limiter, and RC filter component in digital and analog circuits across consumer electronics, IoT devices, and industrial control boards. Its 4.7 kΩ value is a standard selection for I2C bus pull-ups on 3.3 V and 5 V systems, and for LED current-limiting networks in display and indicator modules. The compact 0402 footprint enables high-density placement on mobile phone boards, wearable sensors, and miniaturized embedded computing modules.
Specifications
| Pbfree Code | No |
| Reach Compliance Code | Not Compliant |
| YTEOL | 9 |
| Construction | Rectangular |
| JESD-609 Code | e0 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.35mm |
| Package Length | 1mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 0.5mm |
| Packing Method | TR, PUNCHED PAPER, 7 INCH |
| Rated Power Dissipation (P) | 0.1W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 4700Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0402 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 200ppm/°C |
| Terminal Finish | Tin/Lead (Sn90Pb10) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Tolerance | 5% |
| Working Voltage | 75V |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Non-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
Why is the RK73B1ELTP472J 4.7 kΩ value a common choice for I2C pull-up resistors on 3.3 V designs?
On a 3.3 V I2C bus, a 4.7 kΩ pull-up resistor draws approximately 0.7 mA per line when the bus is pulled low, staying well within the 1/16 W (62.5 mW) power rating of the RK73B1ELTP472J. This value also meets the standard I2C specification for bus rise time, supporting clock speeds up to 400 kHz (Fast Mode) on bus capacitances up to 100 pF without requiring external buffers.
How does the 0402 package size of the RK73B1ELTP472J benefit high-density PCB layout?
The 0402 package body measures 1.0 mm x 0.5 mm with a profile height of 0.35 mm, allowing placement at 0.5 mm center-to-center spacing in resistor arrays on fine-pitch PCBs. Compared to the 0603 package, the 0402 occupies roughly 55% less board area, enabling designers to fit more passive components per cm² on IoT and wearable boards where space is critically limited.
For an LED current-limiting application at 5 V, how does the RK73B1ELTP472J's power rating factor into the design?
At 5 V supply with a 2 V forward-voltage LED, the voltage across the 4.7 kΩ RK73B1ELTP472J is 3 V, resulting in a power dissipation of approximately 1.9 mW — well below the 62.5 mW (1/16 W) rated limit. This leaves a comfortable 30× derating margin, ensuring the resistor operates within its temperature rating of -55°C to +155°C without thermal stress in typical LED indicator circuits.
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