RK73B1ETTP121J KOA Speer Resistor (Resistor Chip) In Stock
KOA Speer RK73B1ETTP121J is an ultra-compact thick-film surface mount resistor in 0402 package format delivering 120 Ω resistance at ±5% tolerance with 1/16 W (62.5 mW) power handling. This miniature component measures just 1 mm × 0.35 mm and maintains RoHS compliance for lead-free assembly. In stock worldwide through multiple distributors with standard shipping options.
- Manufacturer
- KOA Speer
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- RK73B1ETTP121J Datasheet PDF
- Category
- Resistor
- Price
- From $0.0017(MOQ 500)
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of RK73B1ETTP121J?
- 0402 Package (1 mm × 0.35 mm) for Maximum Board Density
- 120 Ω at ±5% Tolerance with Precision Current-Limiting Capability
- 1/16 W Power Rating in Ultra-Compact Form Factor
What is RK73B1ETTP121J used for?
The RK73B1ETTP121J serves as a current-limiting and pull-up resistor in high-density mobile devices, wearables, and compact IoT modules. Its 0402 footprint is essential for space-constrained applications where every square millimeter of PCB area matters. The component is widely used in digital signal conditioning, LED indicator circuits, and low-power sensor interface networks.
What are the specifications of RK73B1ETTP121J?
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 13 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| 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, IEC60115-8 |
| Resistance | 120Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0402 |
| 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 | 75V |
| 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 |
Where can I find the RK73B1ETTP121J datasheet?
RK73B1ETTP121J Datasheet DownloadOfficial datasheet from KOA Speer
What are equivalent replacements for RK73B1ETTP121J?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the critical electrical and physical specifications of the RK73B1ETTP121J?
The RK73B1ETTP121J provides 120 Ω resistance with ±5% tolerance and 62.5 mW (1/16 W) power rating. Its 0402 package measures 1 mm length × 0.35 mm height, making it 60% smaller than 0603 packages. The component operates across industrial temperature ranges and maintains RoHS and REACH compliance for modern electronics manufacturing.
How does the 0402 package enable higher component density compared to traditional resistor formats?
The 0402 package at 1 mm × 0.35 mm footprint packs 75% more component sites per square centimeter than 0603 packages. For smart cards and wearable devices, engineers can achieve 10,000+ resistor placements on a 100 cm² board. This density advantage makes the RK73B1ETTP121J critical for modern mobile and IoT products with strict size and weight constraints.
Which applications best utilize the 120 Ω value with 62.5 mW power rating?
The 120 Ω value with 1/16 W rating is ideal for digital signal pull-ups on 3.3 V and 5 V rails, drawing approximately 27 mA and 42 mA respectively at full voltage. Common uses include I²C/SPI termination, LED current limiting for 5 mA indicator LEDs, and microcontroller reset/wake signal conditioning. It is not suitable for high-current applications exceeding 100 mA.
What procurement considerations apply when ordering RK73B1ETTP121J in volume?
KOA Speer ships the RK73B1ETTP121J in 5,000-unit tape reels (standard SMT format) with a typical 2-4 week lead time from stock. Volume orders of 50,000+ units may qualify for 5-10% discounts. The component is widely stocked by Digi-Key, Mouser, and Arrow Electronics, ensuring supply chain flexibility and competitive pricing across region.
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Why Buy from FindMyChip
About KOA Speer
KOA Speer is a leading electronic component manufacturer. FindMyChip sources KOA Speer ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $0.0068 | $3.42 |
| 1000+ | $0.0057 | $5.74 |
| 2500+ | $0.0025 | $6.25 |
| 5000+ | $0.0017 | $8.50 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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