Equivalent & Substitute Parts for RK73G1HTTC9101D

Part Overview

The RK73G1HTTC9101D is a 9.1 kOhms ±0.5% chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently marked as "Not For New Designs," indicating it has been superseded in the product line. Identifying equivalent substitute parts ensures design continuity and maintains compliance with automotive reliability requirements.

Key Parameters

Parameter	Value
Resistance	9.1 kOhms
Tolerance	±0.5%
Power Rating	0.05W (1/20W)
Package / Case	0201 (0603 Metric)
Composition	Thick Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
Size / Dimension	0.024" L x 0.012" W (0.60mm x 0.30mm)
Height - Seated (Max)	0.010" (0.26mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RK73G1HTTC9101D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Resistance value: 9.1 kOhms (exact match required)
Tolerance: ±0.5% (exact match required)
Power rating: 0.05W / 1/20W (exact match required)
Temperature coefficient: ±50ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

Package / Case: 0201 (0603 Metric) (exact match required)
Physical dimensions: 0.024" L x 0.012" W / 0.60mm x 0.30mm (exact match required)
Height - Seated (Max): 0.010" (0.26mm) (exact match required)

Compliance & Certification:

Automotive AEC-Q200 qualification (required for automotive applications)
RoHS3 compliance (required for regulatory conformance)
Moisture Sensitivity Level 1 (required for handling and storage)

Substitute parts must match all electrical, mechanical, and compliance parameters without exception. Composition (Thick Film) and series designation (RK73G) serve as additional confirmation of functional equivalence.

Parameter Comparison

Parameter	RK73G1HTTC9101D (Main Part)	RK73G1HTTCM9101D (Substitute)	Match Status
Manufacturer	KOA Speer Electronics, Inc.	KOA Speer Electronics, Inc.	Match
Series	RK73G	RK73G	Match
Resistance	9.1 kOhms	9.1 kOhms	Match
Tolerance	±0.5%	±0.5%	Match
Power Rating	0.05W (1/20W)	0.05W (1/20W)	Match
Composition	Thick Film	Thick Film	Match
Temperature Coefficient	±50ppm/°C	±50ppm/°C	Match
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	Match
Package / Case	0201 (0603 Metric)	0201 (0603 Metric)	Match
Size / Dimension	0.024" L x 0.012" W (0.60mm x 0.30mm)	0.024" L x 0.012" W (0.60mm x 0.30mm)	Match
Height - Seated (Max)	0.010" (0.26mm)	0.010" (0.26mm)	Match
AEC-Q200 Rating	Yes	Yes	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match
Product Status	Not For New Designs	Active	Upgrade Path

Engineering Selection Recommendations

The RK73G1HTTCM9101D is the direct equivalent substitute for the RK73G1HTTC9101D. Both components are manufactured by KOA Speer Electronics, Inc., and share identical electrical, mechanical, and compliance specifications. The primary distinction is product status: the original part is marked "Not For New Designs," while the substitute is designated "Active."

For new automotive designs, the RK73G1HTTCM9101D should be selected. Both parts maintain full AEC-Q200 automotive qualification, ROHS3 compliance, and identical performance characteristics across the specified operating temperature range of -55°C to 155°C. The substitute part is functionally interchangeable in all applications where the main part was previously specified.

Inventory availability should be considered in component procurement planning. The substitute part currently has 824 units in stock compared to 1,068 units of the original part.

Frequently Asked Questions (FAQ)

Q: Can RK73G1HTTCM9101D be used as a direct replacement for RK73G1HTTC9101D?

A: Yes. Both parts are electrically and mechanically identical with matching 9.1 kOhms resistance, ±0.5% tolerance, 0.05W power rating, 0201 package, and AEC-Q200 automotive qualification. The substitute part is the active production equivalent.

Q: What is the significance of the product status difference?

A: The original part (RK73G1HTTC9101D) is marked "Not For New Designs," indicating it has been superseded. The substitute (RK73G1HTTCM9101D) is designated "Active," meaning it is the current production part recommended for all new applications.

Q: Are there any differences in package or physical dimensions?

A: No. Both parts use the identical 0201 (0603 Metric) package with dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). They are mechanically interchangeable on PCBs.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both the RK73G1HTTC9101D and RK73G1HTTCM9101D are AEC-Q200 qualified for automotive applications and are ROHS3 compliant. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: What is the temperature coefficient specification?

A: Both parts have a temperature coefficient of ±50ppm/°C and operate across the range of -55°C to 155°C, meeting automotive environmental requirements.

Q: Are there any differences in tolerance or resistance value?

A: No. Both parts are specified at 9.1 kOhms with ±0.5% tolerance. Tolerance and resistance value are identical.

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