RC6432J680CS Equivalent & Substitute Parts Reference

Part Overview

The RC6432J680CS is a 68 Ohms ±5% 1W chip resistor manufactured by Samsung Electro-Mechanics in the 2512 (6432 Metric) package. This thick film, moisture-resistant component operates across -55°C to 155°C and is ROHS3 compliant with MSL 1 rating. The part is currently active in production with 737 pieces in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to support component sourcing flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Specification Basis
Resistance	68 Ohms	Core electrical specification
Tolerance	±5%	Accuracy classification
Power Rating	1W	Thermal dissipation capability
Package / Case	2512 (6432 Metric)	Physical form factor
Composition	Thick Film	Manufacturing technology
Temperature Coefficient	±100ppm/°C	Stability specification
Operating Temperature Range	-55°C ~ 155°C	Environmental limits
Moisture Sensitivity Level	1 (Unlimited)	Handling and storage
RoHS Status	ROHS3 Compliant	Environmental regulation

Substitute Part Grouping Explanation

Substitute parts for the RC6432J680CS are classified into three categories based on electrical and mechanical parameter alignment:

Direct Equivalent (Tolerance ±5%, Power 1W): RC2512JK-0768RL (YAGEO) maintains identical electrical specifications: 68 Ohms ±5% at 1W power rating. Physical dimensions are within acceptable tolerance (6.35mm x 3.10mm vs. 6.30mm x 3.20mm). This part is a direct functional replacement with no performance trade-offs.

Upgrade Substitutes (Tolerance ±1%, Power 1W or 2W): RC2512FK-0768RL (YAGEO) and RMCF2512FT68R0 (Stackpole) provide improved tolerance (±1% vs. ±5%) while maintaining 1W power rating and identical 68 Ohm resistance. RHC2512FT68R0 (Stackpole) offers both improved tolerance (±1%) and increased power rating (2W), providing enhanced thermal margin. These parts are suitable for applications requiring tighter tolerance or higher power dissipation capability.

Similar Substitutes (Tolerance ±1%, Automotive AEC-Q200 Rated): CRCW251268R0FKEG (Vishay Dale), CRCW251268R0FKEGHP (Vishay Dale), and RPC2512JT68R0 (Stackpole) incorporate automotive-grade AEC-Q200 qualification with ±1% tolerance. CRCW251268R0FKEGHP and RPC2512JT68R0 feature pulse withstanding capability at 1.5W and 1.5W respectively. These parts are applicable in automotive and high-reliability applications where AEC-Q200 certification is required.

All substitute parts maintain the 2512 package form factor, thick film composition, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, MSL 1 rating, and ROHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Features	RoHS	MSL
RC6432J680CS	Samsung Electro-Mechanics	68 Ω	±5%	1	2512	±100ppm/°C	-55~155°C	Moisture Resistant	ROHS3	1
RC2512JK-0768RL	YAGEO	68 Ω	±5%	1	2512	±100ppm/°C	-55~155°C	Moisture Resistant	ROHS3	1
RC2512FK-0768RL	YAGEO	68 Ω	±1%	1	2512	±100ppm/°C	-55~155°C	Moisture Resistant	ROHS3	1
RHC2512FT68R0	Stackpole Electronics Inc	68 Ω	±1%	2	2512	±100ppm/°C	-55~155°C	Moisture Resistant	ROHS3	1
CRCW251268R0FKEG	Vishay Dale	68 Ω	±1%	1	2512	±100ppm/°C	-55~155°C	Automotive AEC-Q200	ROHS3	1
CRCW251268R0FKEGHP	Vishay Dale	68 Ω	±1%	1.5	2512	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	ROHS3	1
RMCF2512FT68R0	Stackpole Electronics Inc	68 Ω	±1%	1	2512	±100ppm/°C	-55~155°C	Automotive AEC-Q200	ROHS3	1
RPC2512JT68R0	Stackpole Electronics Inc	68 Ω	±5%	1.5	2512	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required): RC2512JK-0768RL is the primary equivalent substitute. Both parts share identical electrical specifications (68 Ω ±5% at 1W), matching package dimensions, and equivalent compliance certifications (ROHS3, MSL 1). This part is suitable for applications where the original specification tolerance and power rating are sufficient.

For Enhanced Tolerance Applications: RC2512FK-0768RL and RMCF2512FT68R0 provide ±1% tolerance while maintaining 1W power rating and 2512 package compatibility. Selection between these two depends on supply availability and preferred manufacturer qualification status. Both are ROHS3 compliant and MSL 1 rated.

For Increased Thermal Margin: RHC2512FT68R0 offers 2W power rating with ±1% tolerance, providing enhanced thermal dissipation capability. This part is applicable in designs where power dissipation margins require improvement or where tighter tolerance is mandated.

For Automotive and High-Reliability Applications: CRCW251268R0FKEG, CRCW251268R0FKEGHP, and RMCF2512FT68R0 carry AEC-Q200 automotive qualification. CRCW251268R0FKEGHP and RPC2512JT68R0 include pulse withstanding capability for transient protection. These parts are required for automotive-grade designs or applications subject to automotive supply chain requirements.

All substitute parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can RC2512JK-0768RL directly replace RC6432J680CS without circuit modification?

A: Yes. RC2512JK-0768RL is a direct equivalent with identical resistance (68 Ω), tolerance (±5%), power rating (1W), package (2512), and operating temperature range (-55°C to 155°C). Physical dimensions are within acceptable tolerance. No circuit modification is required.

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

A: The direct equivalent (RC2512JK-0768RL) matches all electrical specifications of the original part. Upgrade substitutes (RC2512FK-0768RL, RMCF2512FT68R0, RHC2512FT68R0) provide improved tolerance (±1% vs. ±5%) and/or increased power rating (1.5W or 2W vs. 1W). These upgrades are backward compatible but offer enhanced performance margins.

Q: When should I use automotive-qualified parts (AEC-Q200)?

A: Automotive-qualified parts (CRCW251268R0FKEG, CRCW251268R0FKEGHP, RMCF2512FT68R0, RPC2512JT68R0) are required for automotive applications, designs subject to automotive supply chain requirements, or applications demanding high-reliability qualification. These parts undergo additional qualification testing and traceability requirements.

Q: Are all substitute parts available in the same packaging options?

A: Packaging varies by manufacturer. RC6432J680CS and RC2512JK-0768RL are available in standard tape formats. Verify specific packaging requirements (Tape & Reel vs. Cut Tape) with your supplier, as some substitutes may have different packaging availability.

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

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

Q: Can I use RPC2512JT68R0 as a substitute if my design only requires 1W power rating?

A: Yes. RPC2512JT68R0 provides 1.5W power rating, which exceeds the 1W requirement of the original part. The higher power rating is a non-limiting characteristic and provides additional thermal margin. However, verify that the automotive AEC-Q200 qualification and pulse withstanding features are compatible with your application requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental regulatory status of the original RC6432J680CS.

Q: What is the temperature coefficient specification and why does it matter?

A: All parts maintain ±100ppm/°C temperature coefficient, indicating resistance value changes by approximately 0.01% per degree Celsius across the operating range. This specification is identical across all substitutes and ensures consistent thermal performance characteristics.

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