Equivalent & Substitute Parts for ERJ-S1TF18R2U

Part Overview

The ERJ-S1TF18R2U is a 18.2 Ohms ±1% 1W Chip Resistor in 2512 (6432 Metric) package manufactured by Panasonic Electronic Components. This thick film resistor features anti-sulfur coating and automotive AEC-Q200 qualification, designed for high-reliability applications in automotive and industrial environments. The part is currently in active production status with 1124 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand alternative performance characteristics such as increased power rating, or when supply chain optimization requires sourcing from multiple manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

ERJ-S1TF18R2U

Panasonic Electronic ComponentsIn Stock: 1227ERJ-S1TF18R2U Datasheet

Current PartRFQ

ERJ-1TNF18R2U

Panasonic Electronic ComponentsIn Stock: 2597ERJ-1TNF18R2U Datasheet

SimilarRFQ

CRCW251218R2FKEG

Vishay DaleIn Stock: 6105CRCW251218R2FKEG Datasheet

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CRCW251218R2FKEGHP

Vishay DaleIn Stock: 2706CRCW251218R2FKEGHP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1TF18R2U is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 18.2 Ohms
• Tolerance: ±1%
• Package / Case: 2512 (6432 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Automotive Rating: AEC-Q200
• RoHS Status: ROHS3 Compliant

Allowable Variation:

• Power Rating: Substitutes with equal or higher power rating (1W or greater) are acceptable, as increased power dissipation capability does not compromise circuit performance
• Physical dimensions: Minor variations within supplier device package specifications are permissible provided the 2512 package footprint is maintained

The substitute parts listed below meet all mandatory parameters and are therefore electrically and mechanically interchangeable with the ERJ-S1TF18R2U in automotive and industrial applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: ERJ-S1TF18R2U The ERJ-S1TF18R2U is the recommended choice for new designs. It maintains active production status, includes anti-sulfur coating for enhanced environmental protection, and carries full AEC-Q200 automotive qualification. This part is suitable for all automotive and industrial applications requiring 18.2 Ohms ±1% 1W thick film resistors in 2512 package.

Secondary Selection: CRCW251218R2FKEG (Vishay Dale) The CRCW251218R2FKEG is a direct electrical and mechanical equivalent from Vishay Dale. It maintains active production status and meets all electrical specifications and automotive certifications. This part is suitable as a primary substitute when ERJ-S1TF18R2U availability is constrained. Physical dimensions are within acceptable tolerance (6.30mm x 3.15mm versus 6.40mm x 3.20mm).

Enhanced Performance Option: CRCW251218R2FKEGHP (Vishay Dale) The CRCW251218R2FKEGHP provides increased power rating (1.5W versus 1W) while maintaining all other electrical parameters. This part includes pulse withstanding capability and is suitable for applications requiring enhanced thermal margin or pulse current handling. It is electrically and mechanically compatible with the ERJ-S1TF18R2U and represents an upgrade path for designs with marginal power budgets.

Legacy Status: ERJ-1TNF18R2U (Panasonic) The ERJ-1TNF18R2U is electrically and mechanically equivalent but carries "Not For New Designs" status. This part should be used only for legacy system maintenance or when existing inventory must be consumed. New designs should not incorporate this part number.

Frequently Asked Questions (FAQ)

Q: Can CRCW251218R2FKEG be used as a direct replacement for ERJ-S1TF18R2U? A: Yes. Both parts meet identical electrical specifications (18.2 Ohms ±1%, 1W, ±100ppm/°C, -55°C to 155°C) and are packaged in 2512 (6432 Metric) format. Both carry AEC-Q200 automotive qualification and ROHS3 compliance. Physical dimensions are within acceptable tolerance for PCB footprint compatibility.

Q: What is the advantage of CRCW251218R2FKEGHP over the standard 1W versions? A: The CRCW251218R2FKEGHP provides 1.5W power rating instead of 1W, offering 50% additional thermal capacity. It also includes pulse withstanding capability. All other electrical parameters remain identical. This part is suitable for applications where thermal margin is critical or where pulse current events occur.

Q: Why is ERJ-1TNF18R2U marked "Not For New Designs"? A: The ERJ-1TNF18R2U is a legacy part number from Panasonic's previous product generation. While electrically and mechanically equivalent, it has been superseded by the ERJ-S1TF18R2U series. New designs should use the current ERJ-S1TF18R2U or equivalent parts from active product lines.

Q: Are there physical dimension differences between these parts? A: Minor variations exist within supplier specifications. ERJ-S1TF18R2U and ERJ-1TNF18R2U are specified at 6.40mm x 3.20mm, while CRCW parts are specified at 6.30mm x 3.15mm. Both dimensions fall within the 2512 (6432 Metric) package standard and are compatible with standard PCB footprints designed for this package.

Q: Do all substitute parts carry AEC-Q200 automotive qualification? A: Yes. All listed substitute parts (ERJ-1TNF18R2U, CRCW251218R2FKEG, and CRCW251218R2FKEGHP) carry AEC-Q200 automotive qualification and are suitable for automotive applications requiring this certification.

Q: What is the moisture sensitivity level for these parts? A: All parts listed carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity precautions are required during storage, handling, or assembly.