RN73C2B2K49BTDF Equivalent & Substitute Parts

Part Overview

The RN73C2B2K49BTDF is a 2.49 kOhms ±0.1% thin film chip resistor manufactured by TE Connectivity Passive Product in the 1206 (3216 Metric) package. This 0.125W, 1/8W surface mount resistor operates across a temperature range of -55°C to 155°C with a temperature coefficient of ±10ppm/°C. The component is classified as Active product status and is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required for design flexibility, supply chain alternatives, or performance upgrades within allowable parameter tolerances.

Substiute Parts

RN73C2B2K49BTDF

TE Connectivity Passive ProductIn Stock: 836RN73C2B2K49BTDF Datasheet

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ERA-8ARB2491V

Panasonic Electronic ComponentsIn Stock: 1394ERA-8ARB2491V Datasheet

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ERA-8ARW2491V

Panasonic Electronic ComponentsIn Stock: 4612ERA-8ARW2491V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN73C2B2K49BTDF are qualified based on the following allowable parameters:

Electrical Compatibility:

• Identical resistance value: 2.49 kOhms
• Equal or superior tolerance: ±0.1% or tighter (±0.05%)
• Equal or superior power rating: 0.125W minimum
• Identical temperature coefficient: ±10ppm/°C
• Identical operating temperature range: -55°C ~ 155°C

Mechanical Compatibility:

• Identical package: 1206 (3216 Metric)
• Identical composition: Thin Film
• Identical termination count: 2

Compliance Requirements:

• ROHS3 compliant
• MSL 1 (Unlimited) or equivalent

The substitute parts ERA-8ARB2491V and ERA-8ARW2491V meet these criteria. Both are manufactured by Panasonic Electronic Components in the ERA-8A series and maintain identical resistance, tolerance (or superior), temperature coefficient, operating temperature range, and package specifications. The ERA-8ARW2491V offers enhanced tolerance (±0.05%) compared to the main part specification.

Parameter Comparison

Engineering Selection Recommendations

RN73C2B2K49BTDF (Main Part): Select this part when the 0.125W power rating is sufficient for the application and standard industrial-grade thin film resistor performance is required. This component is ROHS3 compliant with unlimited moisture sensitivity rating, suitable for general industrial applications.

ERA-8ARB2491V (Substitute): This part provides identical electrical specifications with a doubled power rating (0.25W vs. 0.125W), offering thermal margin improvement in the same 1206 package footprint. The component carries Automotive AEC-Q200 qualification and REACH Unaffected status, making it suitable for automotive and regulated applications requiring enhanced reliability documentation.

ERA-8ARW2491V (Substitute): This part offers superior tolerance performance (±0.05% vs. ±0.1%) with doubled power rating (0.25W vs. 0.125W) in the identical 1206 package. The component carries Automotive AEC-Q200 qualification and REACH Unaffected status. Select this part when tighter tolerance specifications are required without changing package footprint or thermal characteristics.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and environmental compatibility with the main part.

Frequently Asked Questions (FAQ)

Q: Can ERA-8ARB2491V and ERA-8ARW2491V be used as direct replacements for RN73C2B2K49BTDF?

A: Both ERA-8A series parts are mechanically and electrically compatible substitutes. The 1206 package footprint is identical, and all three components share the same 2.49 kOhms resistance value, ±10ppm/°C temperature coefficient, and -55°C to 155°C operating range. The substitute parts feature doubled power ratings (0.25W vs. 0.125W) and automotive AEC-Q200 qualification, providing enhanced performance margins.

Q: What is the difference between ERA-8ARB2491V and ERA-8ARW2491V?

A: Both parts are identical except for tolerance specification. ERA-8ARB2491V maintains ±0.1% tolerance matching the main part, while ERA-8ARW2491V offers tighter ±0.05% tolerance. Both provide 0.25W power rating and automotive AEC-Q200 qualification in the same 1206 package.

Q: Are there physical footprint differences between the main part and substitutes?

A: Minor dimensional variations exist. The RN73C2B2K49BTDF measures 0.120" L x 0.061" W with 0.026" maximum seated height, while both ERA-8A substitutes measure 0.126" L x 0.063" W with 0.028" maximum seated height. These differences are within standard 1206 package tolerances and do not affect PCB layout compatibility.

Q: Do the substitute parts carry automotive qualification?

A: Yes. Both ERA-8ARB2491V and ERA-8ARW2491V carry Automotive AEC-Q200 qualification, indicating compliance with automotive reliability and quality standards. The main part RN73C2B2K49BTDF does not carry this designation.

Q: What is the REACH compliance status of each part?

A: The main part RN73C2B2K49BTDF shows Vendor Undefined REACH status. Both substitute parts ERA-8ARB2491V and ERA-8ARW2491V are REACH Unaffected, indicating confirmed compliance with REACH regulations.

Q: Can I use a substitute part with higher power rating in a circuit designed for 0.125W?

A: Yes. The substitute parts with 0.25W rating are fully compatible in circuits designed for 0.125W operation. Higher power rating provides additional thermal margin and does not negatively affect circuit performance. The component will operate within specification at lower power dissipation levels.

Q: Are all three parts RoHS compliant?

A: Yes. The main part RN73C2B2K49BTDF and both substitute parts ERA-8ARB2491V and ERA-8ARW2491V are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.