Equivalent & Substitute Parts for RK73B1HTTC8R2J

Part Overview

The RK73B1HTTC8R2J is an 8.2 Ohm ±5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 (0603 Metric) package. This component is qualified to AEC-Q200 automotive standards and features a temperature coefficient of ±400ppm/°C with an operating range of -55°C to 155°C. The part is currently classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and evaluate performance trade-offs for ongoing production or legacy system support.

Substiute Parts

RK73B1HTTC8R2J

KOA Speer Electronics, Inc.In Stock: 1119RK73B1HTTC8R2J Datasheet

Current PartRFQ

RK73B1HTTCM8R2J

KOA Speer Electronics, Inc.In Stock: 1074RK73B1HTTCM8R2J Datasheet

MFR RecommendedRFQ

RC0603F8R2CS

Samsung Electro-MechanicsIn Stock: 872RC0603F8R2CS Datasheet

UpgradeRFQ

RC0603J8R2CS

Samsung Electro-MechanicsIn Stock: 917RC0603J8R2CS Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC8R2J is determined by strict equivalence in the following critical parameters: resistance value (8.2 Ohms), power rating (0.05W), package type (0201), and composition (thick film). All identified substitutes maintain these core electrical and mechanical specifications.

The substitute parts are grouped into two categories:

Manufacturer Equivalent (Same Series): RK73B1HTTCM8R2J represents a direct equivalent from the same manufacturer and series, differing only in packaging format (Bulk versus Tape & Reel). This part maintains identical electrical specifications and automotive qualification.

Cross-Manufacturer Upgrades: RC0603F8R2CS and RC0603J8R2CS are Samsung Electro-Mechanics alternatives that maintain the same resistance, power rating, and package dimensions. These parts offer enhanced tolerance specifications and moisture-resistant characteristics while operating within compatible temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Legacy Support): RK73B1HTTCM8R2J is the manufacturer-recommended equivalent. It maintains identical electrical and thermal specifications, AEC-Q200 automotive qualification, and full temperature range compatibility (-55°C to 155°C). The only difference is packaging format (Bulk instead of Tape & Reel). This part is Active and suitable for ongoing production of legacy designs.

For New Designs or Performance Enhancement: RC0603F8R2CS offers superior tolerance (±1% versus ±5%) and improved temperature coefficient (±300ppm/°C versus ±400ppm/°C), providing better long-term stability and tighter resistance accuracy. RC0603J8R2CS maintains the original ±5% tolerance while providing moisture-resistant characteristics and improved temperature coefficient. Both Samsung alternatives are Active products with ROHS3 compliance and MSL 1 rating.

Temperature Range Consideration: The Samsung alternatives operate to 125°C maximum, compared to 155°C for the KOA parts. Applications requiring operation above 125°C must use RK73B1HTTC8R2J or RK73B1HTTCM8R2J.

Automotive Applications: Only RK73B1HTTC8R2J and RK73B1HTTCM8R2J carry AEC-Q200 qualification. Applications requiring automotive-grade certification must use these KOA parts.

Frequently Asked Questions (FAQ)

Q: Can RC0603F8R2CS or RC0603J8R2CS be used as direct drop-in replacements for RK73B1HTTC8R2J?

A: Yes, for applications operating at or below 125°C that do not require AEC-Q200 automotive qualification. All three parts share identical resistance (8.2 Ohms), power rating (0.05W), and 0201 package dimensions. The Samsung parts offer enhanced moisture resistance and improved temperature coefficient. However, if your application requires the full -55°C to 155°C temperature range or AEC-Q200 certification, use RK73B1HTTCM8R2J instead.

Q: What is the difference between RK73B1HTTC8R2J and RK73B1HTTCM8R2J?

A: These parts are electrically and thermally identical. The primary difference is packaging: RK73B1HTTC8R2J is supplied in Tape & Reel format, while RK73B1HTTCM8R2J is supplied in Bulk format. Both are ROHS3 compliant, AEC-Q200 qualified, and Active products. RK73B1HTTCM8R2J is the manufacturer-recommended equivalent for the obsolete RK73B1HTTC8R2J.

Q: Why does RC0603F8R2CS have ±1% tolerance while the others are ±5%?

A: RC0603F8R2CS is a precision-grade variant from Samsung Electro-Mechanics. The tighter tolerance provides better resistance accuracy and is suitable for applications requiring strict component matching or precision circuit performance. If your circuit design requires only ±5% tolerance, RC0603J8R2CS provides equivalent functionality at potentially lower cost.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RK73B1HTTC8R2J, RK73B1HTTCM8R2J, RC0603F8R2CS, and RC0603J8R2CS are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute should I use for automotive applications?

A: For automotive applications requiring AEC-Q200 qualification, use RK73B1HTTCM8R2J. This part maintains the same automotive-grade specifications as the original RK73B1HTTC8R2J and is Active for new production. The Samsung alternatives (RC0603F8R2CS and RC0603J8R2CS) do not carry AEC-Q200 certification.

Q: What is the impact of the temperature coefficient difference (±400ppm/°C versus ±300ppm/°C)?

A: The temperature coefficient indicates how much the resistance value changes with temperature. The Samsung parts (±300ppm/°C) exhibit better temperature stability than the KOA parts (±400ppm/°C). For applications with tight tolerance requirements across wide temperature ranges, the lower temperature coefficient of the Samsung alternatives provides superior performance.