Equivalent & Substitute Parts for RK73B1HTTC511J

Part Overview

The RK73B1HTTC511J is a 510 Ohm ±5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm). This component meets AEC-Q200 automotive qualification standards and operates across -55°C to 155°C. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary for applications requiring continued supply, design flexibility, or enhanced performance specifications such as improved tolerance or temperature coefficient characteristics.

Key Parameters

Parameter	Value
Resistance	510 Ohms
Tolerance	±5%
Power Rating	0.05W (1/20W)
Package / Case	0201 (0603 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC511J is determined by strict equivalence in the following parameters:

Direct Equivalents (Same Specifications):

Resistance: 510 Ohms
Tolerance: ±5%
Power Rating: 0.05W (1/20W)
Package: 0201 (0603 Metric)
Composition: Thick Film
Temperature Coefficient: ±200ppm/°C
Operating Temperature: -55°C ~ 155°C
RoHS3 Compliance
MSL 1 (Unlimited)

Direct equivalent parts maintain identical electrical and mechanical specifications and are interchangeable without circuit redesign.

Upgrade Substitutes (Enhanced Tolerance):

Resistance: 510 Ohms
Tolerance: ±1% (improved from ±5%)
Power Rating: 0.05W (1/20W)
Package: 0201 (0603 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C or ±200ppm/°C
Operating Temperature: -55°C ~ 155°C
RoHS3 Compliance
MSL 1 (Unlimited)

Upgrade substitutes provide tighter tolerance specifications and lower temperature coefficients, suitable for applications requiring improved accuracy and stability. These parts are pin-compatible and functionally superior.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	Inventory (Pcs)
RK73B1HTTC511J	KOA Speer Electronics	510 Ω	±5%	0.05	±200	-55 ~ 155	Not For New Designs	11429
RK73B1HTTCM511J	KOA Speer Electronics	510 Ω	±5%	0.05	±200	-55 ~ 155	Active	835
AC0201JR-07510RL	YAGEO	510 Ω	±5%	0.05	±200	-55 ~ 155	Active	651
CRCW0201510RJNED	Vishay Dale	510 Ω	±5%	0.05	±200	-55 ~ 155	Active	10581
ERJ-1GNJ511C	Panasonic Electronic Components	510 Ω	±5%	0.05	±200	-55 ~ 125	Active	9027
CRCW0201510RFKED	Vishay Dale	510 Ω	±1%	0.05	±100	-55 ~ 155	Active	4364
CRCW0201510RFNED	Vishay Dale	510 Ω	±1%	0.05	±200	-55 ~ 155	Active	37208
ERJ-1GNF5100C	Panasonic Electronic Components	510 Ω	±1%	0.05	±200	-55 ~ 125	Active	51486

Engineering Selection Recommendations

For Direct Replacement (Equivalent Specifications):

Select from RK73B1HTTCM511J, AC0201JR-07510RL, CRCW0201510RJNED, or ERJ-1GNJ511C when maintaining identical electrical performance is required. All direct equivalents maintain ±5% tolerance, ±200ppm/°C temperature coefficient, and 0.05W power rating. RK73B1HTTCM511J is the manufacturer-recommended successor from KOA Speer Electronics with Active product status. CRCW0201510RJNED offers the highest inventory availability (10581 pcs) among direct equivalents. AC0201JR-07510RL includes moisture-resistant features. ERJ-1GNJ511C operates to -55°C ~ 125°C, which is suitable for applications not requiring the full 155°C upper limit.

For Enhanced Performance (Upgrade Substitutes):

Select CRCW0201510RFNED or CRCW0201510RFKED when improved tolerance and temperature stability are required. Both parts upgrade tolerance to ±1%, reducing resistance variation. CRCW0201510RFNED maintains ±200ppm/°C temperature coefficient with -55°C ~ 155°C operating range and offers maximum inventory (37208 pcs). CRCW0201510RFKED provides the lowest temperature coefficient (±100ppm/°C) with identical operating temperature range, suitable for precision applications. ERJ-1GNF5100C provides ±1% tolerance and ±200ppm/°C coefficient with highest inventory availability (51486 pcs), though operating temperature is limited to -55°C ~ 125°C.

All substitute parts maintain 0201 package compatibility, ROHS3 compliance, and MSL 1 rating. Selection should be based on application requirements for tolerance, temperature range, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTC511J be directly replaced with RK73B1HTTCM511J?

A: Yes. RK73B1HTTCM511J is the manufacturer-recommended equivalent from KOA Speer Electronics with identical electrical specifications (510 Ω ±5%, 0.05W, ±200ppm/°C, -55°C ~ 155°C) and 0201 package format. The primary difference is product status: RK73B1HTTCM511J is Active while RK73B1HTTC511J is Not For New Designs.

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents (RK73B1HTTCM511J, AC0201JR-07510RL, CRCW0201510RJNED, ERJ-1GNJ511C) maintain identical ±5% tolerance and ±200ppm/°C temperature coefficient. Upgrade substitutes (CRCW0201510RFNED, CRCW0201510RFKED, ERJ-1GNF5100C) provide tighter ±1% tolerance and lower or equal temperature coefficients, offering improved accuracy and stability for precision applications.

Q: Are all substitute parts compatible with the 0201 package footprint?

A: Yes. All listed substitute parts use the 0201 (0603 Metric) package with identical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and maximum seated height (0.010" / 0.26mm). All parts are mechanically and electrically interchangeable at the PCB level.

Q: Which substitute offers the best inventory availability?

A: CRCW0201510RFNED (Vishay Dale) offers the highest inventory with 37208 pcs in stock. This upgrade substitute provides ±1% tolerance and is suitable for applications requiring improved accuracy while maintaining full -55°C ~ 155°C operating range.

Q: Can upgrade substitutes with ±1% tolerance be used in circuits designed for ±5% tolerance?

A: Yes. Upgrade substitutes with ±1% tolerance are functionally superior and fully compatible with circuits designed for ±5% tolerance. The tighter tolerance provides better performance without requiring circuit modifications.

Q: What is the operating temperature limitation for ERJ-1GNJ511C and ERJ-1GNF5100C?

A: Both Panasonic ERJ-1GN series parts operate to -55°C ~ 125°C, which is 30°C lower than the maximum 155°C of the original RK73B1HTTC511J. These parts are suitable for applications not requiring operation above 125°C.

Q: Are all substitute parts AEC-Q200 qualified?

A: The original RK73B1HTTC511J and RK73B1HTTCM511J explicitly list AEC-Q200 qualification. AC0201JR-07510RL includes AEC-Q200 and moisture-resistant features. CRCW0201510RJNED, CRCW0201510RFKED, and CRCW0201510RFNED do not list explicit AEC-Q200 ratings in provided specifications. ERJ-1GNJ511C and ERJ-1GNF5100C do not list explicit AEC-Q200 ratings. For automotive applications requiring AEC-Q200 compliance, verify with manufacturer documentation.

Q: What is the difference between CRCW0201510RFKED and CRCW0201510RFNED?

A: Both are Vishay Dale upgrade substitutes with ±1% tolerance and 0201 package. CRCW0201510RFKED has ±100ppm/°C temperature coefficient, while CRCW0201510RFNED has ±200ppm/°C. CRCW0201510RFKED provides superior temperature stability for precision applications. CRCW0201510RFNED offers significantly higher inventory (37208 vs 4364 pcs).

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