Equivalent & Substitute Parts for RK73H1HTTC1801F

Part Overview

The RK73H1HTTC1801F is a 1.8 kOhms ±1% thick film chip resistor in 0201 package (0603 metric) rated for 0.05W power dissipation. Manufactured by KOA Speer Electronics, Inc., this component meets AEC-Q200 automotive qualification standards and features moisture-resistant construction suitable for automotive and industrial applications operating across -55°C to 155°C.

The main part carries a "Not For New Designs" product status, indicating it has been superseded. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and transition to active production alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73H1HTTC1801F

KOA Speer Electronics, Inc.In Stock: 14885RK73H1HTTC1801F Datasheet

Current PartRFQ

RK73H1HTTCM1801F

KOA Speer Electronics, Inc.In Stock: 784RK73H1HTTCM1801F Datasheet

MFR RecommendedRFQ

AC0201FR-071K8L

YAGEOIn Stock: 1070AC0201FR-071K8L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC1801F are qualified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

• Resistance value: 1.8 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• Automotive qualification: AEC-Q200 (exact match required)
• Moisture resistance: Yes (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• MSL rating: 1 (Unlimited) (exact match required)

All identified substitutes meet these criteria and are therefore electrically and mechanically interchangeable with the main part in applications requiring these specifications.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM1801F (KOA Speer Electronics, Inc.): This part is the manufacturer-recommended upgrade from the main part number. Both are KOA products within the RK73H series, ensuring design continuity and manufacturing consistency. The RK73H1HTTCM1801F carries Active product status, confirming ongoing production support and long-term availability. All electrical, mechanical, and compliance parameters are identical to the main part. This substitute is the primary choice for new designs and production transitions.

AC0201FR-071K8L (YAGEO): This part provides cross-manufacturer substitution from YAGEO's AC series. It meets all electrical specifications, package requirements, automotive qualifications (AEC-Q200), and compliance certifications (ROHS3, MSL 1) identical to the main part. The AC0201FR-071K8L carries Active product status and represents a qualified alternative for applications requiring multi-source component strategies or supply chain diversification. Selection between KOA and YAGEO alternatives depends on procurement requirements, inventory availability, and established supplier relationships.

Both substitutes are suitable for direct replacement in automotive and industrial applications requiring AEC-Q200 qualified 1.8 kOhms ±1% resistors in 0201 package format.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM1801F be used as a direct replacement for RK73H1HTTC1801F? A: Yes. Both parts share identical electrical specifications (1.8 kOhms ±1% tolerance, 0.05W power rating, ±200ppm/°C temperature coefficient), mechanical package (0201/0603 metric), composition (thick film), operating temperature range (-55°C to 155°C), and compliance certifications (AEC-Q200, ROHS3, MSL 1). The primary difference is product status: RK73H1HTTCM1801F is Active, while the main part is Not For New Designs.

Q: Is AC0201FR-071K8L compatible with designs using RK73H1HTTC1801F? A: Yes. The YAGEO AC0201FR-071K8L meets all specified electrical and mechanical parameters. Both parts are 1.8 kOhms ±1%, 0.05W, 0201 package, thick film composition, with identical temperature coefficients and operating ranges. Both carry AEC-Q200 automotive qualification and ROHS3 compliance. Cross-manufacturer substitution is valid for applications meeting these specifications.

Q: What determines whether a part can substitute for RK73H1HTTC1801F? A: Substitution requires exact matching of: resistance value (1.8 kOhms), tolerance (±1%), power rating (0.05W), package format (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C to 155°C), automotive rating (AEC-Q200), moisture resistance capability, RoHS compliance (ROHS3), and MSL rating (1). Any deviation in these parameters disqualifies a part from substitution.

Q: Why is the main part marked "Not For New Designs"? A: This status indicates the part has been superseded in the manufacturer's product line. RK73H1HTTCM1801F is the active replacement. For new designs, RK73H1HTTCM1801F or AC0201FR-071K8L should be specified to ensure long-term production support and supply continuity.

Q: Are there packaging differences between the substitutes? A: All three parts use identical 0201 (0603 metric) package format with matching physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and height (0.010" / 0.26mm maximum seated height). Packaging is fully interchangeable for PCB assembly and placement equipment.

Q: What is the significance of MSL 1 (Unlimited) rating? A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This simplifies logistics and inventory management compared to higher MSL ratings that require controlled storage environments.