RC3216F4221CS Equivalent & Substitute Parts Reference

Part Overview

The RC3216F4221CS is a 4.22 kOhms ±1% 0.25W chip resistor manufactured by Samsung Electro-Mechanics in 1206 (3216 Metric) package format. 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 in active production status with 728 units in stock.

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the main part. Alternative sources provide design flexibility, supply chain redundancy, and access to specialized variants such as automotive-qualified versions.

Substiute Parts

RC3216F4221CS

Samsung Electro-MechanicsIn Stock: 809RC3216F4221CS Datasheet

Current PartRFQ

CR1206-FX-4221ELF

Bourns Inc.In Stock: 14684CR1206-FX-4221ELF Datasheet

DirectRFQ

RC1206FR-074K22L

YAGEOIn Stock: 34733RC1206FR-074K22L Datasheet

DirectRFQ

AC1206FR-074K22L

YAGEOIn Stock: 9625AC1206FR-074K22L Datasheet

UpgradeRFQ

CRCW12064K22FKEA

Vishay DaleIn Stock: 19895CRCW12064K22FKEA Datasheet

SimilarRFQ

ERJ-8ENF4221V

Panasonic Electronic ComponentsIn Stock: 108657ERJ-8ENF4221V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following parameters:

Electrical Parameters (Must Match):

• Resistance value: 4.22 kOhms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Must Match):

• Package format: 1206 (3216 Metric)
• Number of terminations: 2

Compliance Parameters (Must Match or Exceed):

• RoHS3 compliance
• MSL 1 rating
• REACH unaffected status

Optional Enhancement Parameters:

• Automotive AEC-Q200 qualification (upgrade variants)
• Product status (active preferred, not for new designs acceptable for legacy applications)

All identified substitutes meet or exceed these criteria. Dimensional variations within supplier tolerances do not affect functional substitutability.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

CR1206-FX-4221ELF (Bourns Inc.) and RC1206FR-074K22L (YAGEO) are direct functional equivalents to RC3216F4221CS. Both maintain identical electrical specifications, operating temperature range, and moisture resistance. These parts are in active production and suitable for new designs. Selection between these and the main part depends on supplier availability, lead time, and procurement agreements.

Upgrade Variants (Enhanced Compliance):

AC1206FR-074K22L (YAGEO) and CRCW12064K22FKEA (Vishay Dale) are automotive-qualified alternatives with AEC-Q200 certification. These parts exceed the base specification by including automotive-grade reliability qualification. Use these variants when designs require automotive-level component qualification or when sourcing from automotive supply chains.

Legacy Alternative (Restricted Use):

ERJ-8ENF4221V (Panasonic Electronic Components) carries "Not For New Designs" status but remains in production with substantial inventory. This part is suitable only for legacy system maintenance, repair, or replacement applications where the original part number must be maintained. Do not specify this part for new product development.

Dimensional Considerations:

All substitutes fit the 1206 package envelope. Height variations (0.60mm to 0.75mm maximum seated height) fall within standard PCB assembly tolerances and do not affect board-level compatibility. Verify PCB design clearances if height-constrained applications exist.

Frequently Asked Questions (FAQ)

Q: Can CR1206-FX-4221ELF replace RC3216F4221CS in existing designs?

A: Yes. Both parts share identical electrical specifications (4.22 kΩ ±1%, 0.25W, ±100ppm/°C, -55°C to 155°C), composition (thick film), and package format (1206). The 0.09mm height difference (0.75mm vs 0.66mm) is within standard PCB assembly tolerances.

Q: What is the difference between RC1206FR-074K22L and AC1206FR-074K22L?

A: Both are YAGEO 1206 resistors with identical electrical specifications. AC1206FR-074K22L includes automotive AEC-Q200 qualification and is designated for automotive applications. RC1206FR-074K22L is the standard industrial version. Electrical performance is equivalent; qualification level differs.

Q: Why is ERJ-8ENF4221V marked "Not For New Designs"?

A: This designation indicates the manufacturer has transitioned the product to legacy status. While the part remains available and functionally equivalent, Panasonic recommends newer alternatives for new product development. Use ERJ-8ENF4221V only for field replacements or maintenance of existing systems using this part number.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes carry ROHS3 compliance certification and MSL 1 (unlimited moisture sensitivity level) rating, matching the main part's environmental compliance profile.

Q: Which substitute has the best availability?

A: RC1206FR-074K22L (YAGEO) shows the highest inventory at 34,673 units. ERJ-8ENF4221V (Panasonic) has 108,633 units but is restricted to legacy applications. For new designs, RC1206FR-074K22L or CR1206-FX-4221ELF are recommended based on current stock levels and supplier relationships.

Q: Can automotive-qualified parts (AC1206FR-074K22L, CRCW12064K22FKEA) be used in non-automotive applications?

A: Yes. Automotive-qualified parts exceed standard industrial specifications and are fully compatible with non-automotive designs. Their use in non-automotive applications introduces no technical issues and may provide enhanced reliability margins.

Q: What packaging formats are available for these substitutes?

A: All substitutes are supplied in Tape & Reel (TR) format, standard for automated PCB assembly. Confirm packaging requirements with procurement before finalizing supplier selection.