RC3216F3742CS Equivalent & Substitute Parts Reference

Part Overview

The RC3216F3742CS is a 37.4 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This thick film, moisture-resistant resistor operates across -55°C to 155°C and is ROHS3 compliant with MSL 1 rating. The part is currently in active production status with 638 units in stock.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain optimization is required, or when design flexibility across qualified component sources is needed. All substitute parts listed maintain electrical and mechanical compatibility within the specified parameters.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance Value	37.4 kOhms	Critical - Must Match Exactly
Tolerance	±1%	Critical - Must Match Exactly
Power Rating	0.25W (1/4W)	Critical - Must Match or Exceed
Package / Case	1206 (3216 Metric)	Critical - Must Match Exactly
Composition	Thick Film	Critical - Defines Performance Class
Temperature Coefficient	±100ppm/°C	Critical - Defines Stability
Operating Temperature Range	-55°C ~ 155°C	Critical - Must Match or Exceed
Moisture Resistance	Yes	Important - Environmental Protection
RoHS Status	ROHS3 Compliant	Important - Regulatory Compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - Handling Requirements

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Mandatory Equivalence Requirements:

Resistance value: 37.4 kOhms (exact match)
Tolerance: ±1% (exact match)
Power rating: 0.25W minimum (equal or higher acceptable)
Package: 1206 (3216 Metric) (exact match)
Composition: Thick Film (exact match)
Temperature coefficient: ±100ppm/°C (exact match)
Operating temperature range: -55°C to 155°C minimum (equal or wider acceptable)
RoHS compliance: ROHS3 (exact match)
Moisture sensitivity: MSL 1 (exact match or lower MSL acceptable)

Substitute Classification:

Direct Substitutes (Functionally and mechanically identical):

CR1206-FX-3742ELF (Bourns Inc.)
RC1206FR-0737K4L (YAGEO)

Similar Substitutes (Meet all electrical requirements; additional features present):

CRCW120637K4FKEA (Vishay Dale) - Includes AEC-Q200 automotive qualification
ERJ-8ENF3742V (Panasonic Electronic Components) - Includes AEC-Q200 automotive qualification; Not For New Designs status

All listed substitutes maintain identical electrical performance and mechanical compatibility with the RC3216F3742CS.

Parameter Comparison

Parameter	RC3216F3742CS (Samsung)	CR1206-FX-3742ELF (Bourns)	RC1206FR-0737K4L (YAGEO)	CRCW120637K4FKEA (Vishay Dale)	ERJ-8ENF3742V (Panasonic)
Resistance	37.4 kOhms	37.4 kOhms	37.4 kOhms	37.4 kOhms	37.4 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%
Power Rating	0.25W	0.25W	0.25W	0.25W	0.25W
Package	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Moisture Resistant	Yes	Yes	Yes	No (Standard)	No (Standard)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Not For New Designs
Automotive Rating	None	None	None	AEC-Q200	AEC-Q200
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.122" L x 0.063" W (3.10mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)	0.126" L x 0.063" W (3.20mm x 1.60mm)
Height - Seated (Max)	0.026" (0.66mm)	0.030" (0.75mm)	0.026" (0.65mm)	0.024" (0.60mm)	0.028" (0.70mm)

Engineering Selection Recommendations

For Standard Industrial Applications: Select CR1206-FX-3742ELF (Bourns Inc.) or RC1206FR-0737K4L (YAGEO). Both parts are in active production, maintain identical electrical specifications to the RC3216F3742CS, and provide equivalent moisture-resistant thick film construction. These direct substitutes offer the highest supply availability and cost optimization.

For Automotive Applications: Select CRCW120637K4FKEA (Vishay Dale) when AEC-Q200 automotive qualification is required. This part meets all electrical and mechanical requirements of the RC3216F3742CS while providing automotive-grade reliability certification. The part is in active production status.

For Legacy System Maintenance: ERJ-8ENF3742V (Panasonic Electronic Components) is available for replacement in existing designs. However, this part carries "Not For New Designs" status. Use only when direct compatibility with installed systems is required and no alternative is acceptable.

Physical Clearance Consideration: RC1206FR-0737K4L has a slightly reduced length (3.10mm vs. 3.20mm nominal). Verify PCB layout clearances if space constraints exist. All other dimensions remain within 1206 package specification.

Height Variation: Seated height varies between 0.024" and 0.030" across substitute options. Verify solder reflow profile compatibility and PCB assembly equipment settings if height-sensitive applications exist.

Frequently Asked Questions (FAQ)

Q: Can I use CRCW120637K4FKEA as a direct replacement for RC3216F3742CS in non-automotive applications?

A: Yes. CRCW120637K4FKEA meets all electrical and mechanical requirements of RC3216F3742CS. The AEC-Q200 automotive qualification is an additional feature that does not restrict use in standard industrial applications. The part is electrically and mechanically compatible.

Q: What is the difference between "Direct Substitute" and "Similar Substitute" classifications?

A: Direct substitutes (CR1206-FX-3742ELF, RC1206FR-0737K4L) are functionally identical to the RC3216F3742CS with no additional features or certifications. Similar substitutes (CRCW120637K4FKEA, ERJ-8ENF3742V) include additional qualifications such as AEC-Q200 automotive rating. All meet the core electrical and mechanical requirements.

Q: Why is ERJ-8ENF3742V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development for this part number. While the part remains available in inventory and is functionally equivalent, it should not be selected for new product designs. Use CR1206-FX-3742ELF, RC1206FR-0737K4L, or CRCW120637K4FKEA for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the RC3216F3742CS regulatory status.

Q: Does the moisture-resistant feature differ between parts?

A: CR1206-FX-3742ELF and RC1206FR-0737K4L explicitly specify moisture-resistant construction, matching the RC3216F3742CS. CRCW120637K4FKEA and ERJ-8ENF3742V are standard thick film resistors without explicit moisture-resistant designation. For applications requiring moisture protection, select CR1206-FX-3742ELF or RC1206FR-0737K4L.

Q: Can I mix different substitute parts in the same assembly?

A: Yes. All substitute parts meet identical electrical specifications (37.4 kOhms ±1%, 0.25W, ±100ppm/°C, -55°C to 155°C). Mixing is electrically compatible. However, verify PCB assembly equipment settings accommodate the height variation range (0.024" to 0.030" seated height) if multiple suppliers are used in production.

Q: What is MSL 1 rating and why does it matter?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, meaning standard storage conditions are acceptable without special handling or pre-reflow baking procedures.

Q: Is the slight dimensional difference in RC1206FR-0737K4L (3.10mm vs. 3.20mm length) a concern?

A: The 0.10mm length difference is within 1206 package tolerance. Verify PCB layout clearances if the design has tight spacing constraints. For most applications, this variation is not significant. Contact PCB design team if space margins are minimal.

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