RK73B1HTTC680J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC680J is a 68 Ohm ±5% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm metric). This component is manufactured by KOA Speer Electronics, Inc. and carries AEC-Q200 automotive qualification. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 to support existing designs, provide design flexibility, and ensure supply chain continuity for applications requiring 68 Ohm resistors with matching electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	68 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
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 (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC680J is determined by strict equivalence across the following critical parameters:

Direct Substitution Criteria (Equivalent Parts):

Resistance value: 68 Ohms
Tolerance: ±5%
Power rating: 0.05W (1/20W)
Package: 0201 (0603 Metric)
Composition: Thick Film
Temperature coefficient: ±200ppm/°C
Operating temperature range: -55°C ~ 155°C
Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
RoHS3 compliance
MSL rating: 1 (Unlimited)

Upgrade Substitution Criteria (Enhanced Performance): Upgrade parts maintain all direct substitution criteria but offer improved tolerance (±1% instead of ±5%) and/or enhanced temperature coefficient (±100ppm/°C instead of ±200ppm/°C). These parts are electrically and mechanically compatible with the original specification and provide tighter performance characteristics.

Manufacturer Recommended Upgrade: RK73B1HTTCM680J from KOA Speer Electronics, Inc. is the manufacturer's active product replacement for the obsolete RK73B1HTTC680J, maintaining identical electrical and mechanical specifications while offering active product status.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	Inventory (Pcs)
RK73B1HTTC680J	KOA Speer Electronics, Inc.	RK73B	68 Ohms	±5%	0.05	±200	-55 ~ 155	Not For New Designs	1050
RK73B1HTTCM680J	KOA Speer Electronics, Inc.	RK73B	68 Ohms	±5%	0.05	±200	-55 ~ 155	Active	793
AC0201JR-0768RL	YAGEO	AC	68 Ohms	±5%	0.05	±200	-55 ~ 155	Active	1014
CRCW020168R0JNED	Vishay Dale	CRCW	68 Ohms	±5%	0.05	±200	-55 ~ 155	Active	30795
ERJ-1GNJ680C	Panasonic Electronic Components	ERJ-1GN	68 Ohms	±5%	0.05	±200	-55 ~ 125	Active	59241
RC0201JR-0768RL	YAGEO	RC_L	68 Ohms	±5%	0.05	±200	-55 ~ 125	Active	915
CRCW020168R0FKED	Vishay Dale	CRCW	68 Ohms	±1%	0.05	±100	-55 ~ 155	Active	43771
CRCW020168R0FNED	Vishay Dale	CRCW	68 Ohms	±1%	0.05	±200	-55 ~ 155	Active	46533
ERJ-1GEF68R0C	Panasonic Electronic Components	ERJ-1GE	68 Ohms	±1%	0.05	±200	-55 ~ 125	Obsolete	715513
ERJ-1GNF68R0C	Panasonic Electronic Components	ERJ-1GN	68 Ohms	±1%	0.05	±200	-55 ~ 125	Active	66829

Engineering Selection Recommendations

Primary Recommendation - Manufacturer Direct Upgrade: RK73B1HTTCM680J is the recommended substitute. This part is manufactured by KOA Speer Electronics, Inc., the original manufacturer of the RK73B1HTTC680J. It maintains identical electrical and mechanical specifications while offering active product status, ensuring long-term availability and supply chain stability.

Direct Equivalent Substitutes (Active Products): The following parts provide direct electrical and mechanical equivalence to the RK73B1HTTC680J:

AC0201JR-0768RL (YAGEO): Active product with identical specifications. Includes moisture-resistant feature. Suitable for designs requiring established YAGEO supply chain.
CRCW020168R0JNED (Vishay Dale): Active product with identical specifications. Largest available inventory (30,795 pcs). Suitable for high-volume applications requiring supply security.
ERJ-1GNJ680C (Panasonic Electronic Components): Active product with identical specifications except operating temperature range limited to -55°C ~ 125°C. Largest inventory among Panasonic equivalents (59,241 pcs). Suitable for applications not requiring the full -55°C ~ 155°C range.
RC0201JR-0768RL (YAGEO): Active product with moisture-resistant feature. Operating temperature range limited to -55°C ~ 125°C. Suitable for moisture-sensitive environments within the specified temperature range.

Upgrade Substitutes (Enhanced Tolerance and Temperature Coefficient): The following parts offer improved performance characteristics while maintaining mechanical compatibility:

CRCW020168R0FKED (Vishay Dale): ±1% tolerance with ±100ppm/°C temperature coefficient. Full operating range -55°C ~ 155°C. Highest precision option with extended temperature capability.
CRCW020168R0FNED (Vishay Dale): ±1% tolerance with ±200ppm/°C temperature coefficient. Full operating range -55°C ~ 155°C. Precision upgrade with extended temperature capability.
ERJ-1GNF68R0C (Panasonic Electronic Components): ±1% tolerance with ±200ppm/°C temperature coefficient. Operating range -55°C ~ 125°C. Active product suitable for precision applications within the specified temperature range.

Obsolete Product - Not Recommended: ERJ-1GEF68R0C (Panasonic Electronic Components) carries obsolete product status and should not be selected for new applications despite high inventory availability.

All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and identical physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm).

Frequently Asked Questions (FAQ)

Q: Can I use CRCW020168R0JNED as a direct replacement for RK73B1HTTC680J?

A: Yes. CRCW020168R0JNED provides direct electrical and mechanical equivalence. Both parts are 68 Ohm ±5% thick film resistors rated at 0.05W in 0201 package with identical temperature coefficients (±200ppm/°C) and operating ranges (-55°C ~ 155°C). Physical dimensions and termination specifications are identical.

Q: What is the difference between the direct equivalent parts and the upgrade parts?

A: Direct equivalent parts (AC0201JR-0768RL, CRCW020168R0JNED, ERJ-1GNJ680C, RC0201JR-0768RL) maintain the original ±5% tolerance specification. Upgrade parts (CRCW020168R0FKED, CRCW020168R0FNED, ERJ-1GNF68R0C, ERJ-1GEF68R0C) offer tighter ±1% tolerance and/or improved temperature coefficients (±100ppm/°C or ±200ppm/°C). Upgrade parts are electrically and mechanically compatible and provide enhanced performance characteristics.

Q: Why do some substitute parts have a limited operating temperature range of -55°C ~ 125°C instead of -55°C ~ 155°C?

A: Operating temperature range is a specified parameter that varies by manufacturer and product series. Parts with -55°C ~ 125°C range (ERJ-1GNJ680C, RC0201JR-0768RL, ERJ-1GEF68R0C, ERJ-1GNF68R0C) are suitable for applications operating within this range. Applications requiring the full -55°C ~ 155°C range must select parts with that specification (RK73B1HTTCM680J, AC0201JR-0768RL, CRCW020168R0JNED, CRCW020168R0FKED, CRCW020168R0FNED).

Q: Is RK73B1HTTCM680J the only manufacturer-recommended substitute?

A: RK73B1HTTCM680J is the manufacturer-recommended upgrade from KOA Speer Electronics, Inc., the original manufacturer. It is the direct product line successor to the obsolete RK73B1HTTC680J. Other active substitutes from alternative manufacturers (YAGEO, Vishay Dale, Panasonic) provide equivalent electrical and mechanical performance but represent cross-manufacturer alternatives.

Q: Can I use ERJ-1GEF68R0C despite its obsolete status?

A: ERJ-1GEF68R0C carries obsolete product status and should not be selected for new designs or applications requiring long-term supply assurance. Although inventory is currently available (715,513 pcs), obsolete products lack manufacturer support and future availability guarantees. Active alternatives with identical or superior specifications are available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original RK73B1HTTC680J specification.

Q: What does MSL rating 1 (Unlimited) mean for these resistors?

A: MSL (Moisture Sensitivity Level) rating of 1 indicates unlimited shelf life without moisture bake-out requirements. All listed parts carry this rating, indicating they can be stored and handled under standard conditions without special moisture control procedures.

Q: Which substitute offers the best supply availability?

A: CRCW020168R0JNED (Vishay Dale) offers the largest current inventory at 30,795 pieces, followed by ERJ-1GNJ680C (Panasonic) at 59,241 pieces. For applications requiring immediate or high-volume supply, these parts provide the strongest inventory position.

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