RC1005J393CS 39kΩ 0402 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC1005J393CS is a 39 kΩ ±5% thick film chip resistor in 0402 (1005 Metric) package manufactured by Samsung Electro-Mechanics. This surface mount device is rated for 0.063W (1/16W) power dissipation with moisture resistant construction and operates across -55°C to 155°C. The part is currently active in production with 937 units in stock. Equivalent and substitute parts are necessary to address supply chain flexibility, design optimization for tolerance requirements, and compatibility with automotive or specialized application standards.

Substiute Parts

RC1005J393CS

Samsung Electro-MechanicsIn Stock: 985RC1005J393CS Datasheet

Current PartRFQ

RC0402JR-0739KL

YAGEOIn Stock: 35310RC0402JR-0739KL Datasheet

DirectRFQ

ERJ-2RKF3902X

Panasonic Electronic ComponentsIn Stock: 275611ERJ-2RKF3902X Datasheet

UpgradeRFQ

MCR01MRTF3902

Rohm SemiconductorIn Stock: 1111MCR01MRTF3902 Datasheet

UpgradeRFQ

RC0402FR-0739KL

YAGEOIn Stock: 15711RC0402FR-0739KL Datasheet

UpgradeRFQ

RMCF0402FT39K0

Stackpole Electronics IncIn Stock: 122204RMCF0402FT39K0 Datasheet

UpgradeRFQ

AC0402JR-0739KL

YAGEOIn Stock: 31057AC0402JR-0739KL Datasheet

SimilarRFQ

ERA-2AED393X

Panasonic Electronic ComponentsIn Stock: 16473ERA-2AED393X Datasheet

SimilarRFQ

RMCF0402JT39K0

Stackpole Electronics IncIn Stock: 17804RMCF0402JT39K0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC1005J393CS is determined by the following critical parameters: resistance value (39 kΩ), package type (0402), power rating (0.063W minimum), operating temperature range (-55°C to 155°C), and RoHS3 compliance. Substitute parts are categorized into three groups:

Direct Equivalents maintain identical tolerance (±5%), composition (thick film), and packaging specifications. These parts are pin-compatible and electrically interchangeable without circuit modification.

Upgrade Substitutes offer improved tolerance (±1% or ±0.5%) or enhanced certifications (AEC-Q200 automotive qualification) while maintaining the same 0402 package, power rating, and temperature range. These parts provide superior performance characteristics and are suitable for applications requiring tighter tolerance control or automotive-grade reliability.

Similar Alternatives share the same resistance, package, and power rating but may differ in tolerance, composition (thin film vs. thick film), or feature set (automotive qualification, moisture resistance). These parts are functionally compatible but require verification of application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required): RC0402JR-0739KL (YAGEO) is the primary direct equivalent, offering identical electrical specifications, tolerance, power rating, and moisture resistant thick film construction. Both parts are active in production with high inventory availability (35,266 units). This part is suitable for applications where the original Samsung specification must be maintained without design changes.

For Tolerance-Critical Applications: RC0402FR-0739KL (YAGEO) and RMCF0402FT39K0 (Stackpole Electronics Inc) provide ±1% tolerance upgrade while maintaining 0.063W power rating and thick film composition. RC0402FR-0739KL retains moisture resistant features and is available in 15,700 units. RMCF0402FT39K0 adds AEC-Q200 automotive qualification with 122,141 units in stock. Both are suitable for precision analog circuits requiring tighter tolerance control.

For Automotive and High-Reliability Applications: RMCF0402FT39K0 (Stackpole Electronics Inc) combines ±1% tolerance with AEC-Q200 automotive qualification at the original 0.063W power rating. ERJ-2RKF3902X (Panasonic Electronic Components) offers AEC-Q200 qualification with increased 0.1W power rating and ±1% tolerance. Both parts meet automotive reliability standards and are actively produced.

For Maximum Tolerance and Temperature Stability: ERA-2AED393X (Panasonic Electronic Components) provides ±0.5% tolerance with thin film construction and ±25ppm/°C temperature coefficient (superior to ±100ppm/°C of thick film alternatives). This part includes AEC-Q200 automotive qualification and is suitable for precision measurement and signal conditioning circuits where temperature stability is critical.

For Automotive Applications with Original Tolerance: AC0402JR-0739KL (YAGEO) maintains ±5% tolerance and 0.063W power rating while adding AEC-Q200 automotive qualification and moisture resistant features. This part is suitable for automotive designs that do not require tolerance upgrade but benefit from automotive-grade reliability.

Parts to Avoid: MCR01MRTF3902 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new designs despite offering ±1% tolerance and matching power rating.

Frequently Asked Questions (FAQ)

Q: Can RC0402JR-0739KL directly replace RC1005J393CS without any circuit modifications?

A: Yes. RC0402JR-0739KL is a direct equivalent with identical resistance (39 kΩ), tolerance (±5%), power rating (0.063W), package (0402), composition (thick film), and temperature range (-55°C to 155°C). Both parts are RoHS3 compliant with MSL 1 rating. No circuit modifications are required.

Q: What is the difference between thick film and thin film resistors in this product category?

A: Thick film resistors (RC1005J393CS, RC0402JR-0739KL, RMCF0402FT39K0) have temperature coefficient of ±100ppm/°C and tolerance typically ±5% or ±1%. Thin film resistors (ERA-2AED393X) have superior temperature coefficient of ±25ppm/°C and tighter tolerance of ±0.5%, making them suitable for precision applications. Both types are suitable for 0402 package and -55°C to 155°C operating range.

Q: Can I use ERJ-2RKF3902X as a substitute if my circuit requires 0.063W power rating?

A: ERJ-2RKF3902X has 0.1W power rating, which exceeds the 0.063W requirement of RC1005J393CS. While the higher power rating provides additional thermal margin, the part is physically compatible in 0402 package. However, if board space or thermal design is constrained, use RC0402FR-0739KL or RMCF0402FT39K0 which maintain the original 0.063W rating.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (RC0402JR-0739KL, ERJ-2RKF3902X, MCR01MRTF3902, RC0402FR-0739KL, RMCF0402FT39K0, AC0402JR-0739KL, ERA-2AED393X, RMCF0402JT39K0) are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original RC1005J393CS specification.

Q: Which substitute offers the best temperature stability?

A: ERA-2AED393X (Panasonic Electronic Components) offers the best temperature stability with ±25ppm/°C temperature coefficient compared to ±100ppm/°C for all thick film alternatives. This thin film resistor is suitable for precision analog circuits, measurement instrumentation, and applications where temperature-induced resistance drift must be minimized.

Q: What is the inventory advantage of selecting RMCF0402FT39K0 over RC0402JR-0739KL?

A: RMCF0402FT39K0 has 122,141 units in stock compared to 35,266 units for RC0402JR-0739KL. Additionally, RMCF0402FT39K0 provides ±1% tolerance upgrade and AEC-Q200 automotive qualification while maintaining the same 0.063W power rating and thick film composition. The higher inventory and enhanced specifications make RMCF0402FT39K0 advantageous for high-volume production and automotive applications.

Q: Can I substitute RC1005J393CS with AC0402JR-0739KL in automotive applications?

A: Yes. AC0402JR-0739KL maintains the original ±5% tolerance and 0.063W power rating while adding AEC-Q200 automotive qualification and moisture resistant features. Both parts are 0402 package with identical electrical specifications. AC0402JR-0739KL is suitable for automotive designs that do not require tolerance improvement but benefit from automotive-grade reliability certification.

Q: Why is MCR01MRTF3902 listed if it is discontinued?

A: MCR01MRTF3902 is included for reference purposes to document the complete substitution landscape. However, this part should not be selected for new designs due to discontinued status at DiGi Electronics. Use active alternatives such as RC0402FR-0739KL or RMCF0402FT39K0 for ±1% tolerance requirements.

Q: What packaging format should I specify for high-volume production?

A: For high-volume automated assembly, specify Tape & Reel (TR) packaging. RC1005J393CS, RC0402JR-0739KL, RMCF0402FT39K0, AC0402JR-0739KL, ERA-2AED393X, and RMCF0402JT39K0 are available in Tape & Reel format. ERJ-2RKF3902X and RC0402FR-0739KL are available in Cut Tape & Digi-Reel format, which may require additional handling for automated placement.