Equivalent & Substitute Parts for RNCF1206DKC1K21

Part Overview

The RNCF1206DKC1K21 is a 1.21 kOhms ±0.5% thin film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This automotive-grade component meets AEC-Q200 specifications and is rated for 0.333W (1/3W) power dissipation across an operating temperature range of -55°C to 155°C. The part is currently active in production with 762 units in stock. Substitute parts are identified to provide alternatives with improved tolerance specifications or enhanced environmental performance while maintaining electrical and mechanical compatibility.

Substiute Parts

RNCF1206DKC1K21

Stackpole Electronics IncIn Stock: 870RNCF1206DKC1K21 Datasheet

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ERA-8AEB1211V

Panasonic Electronic ComponentsIn Stock: 20533ERA-8AEB1211V Datasheet

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RG3216P-1211-B-T5

SusumuIn Stock: 5825RG3216P-1211-B-T5 Datasheet

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RT1206BRD071K21L

YAGEOIn Stock: 5894RT1206BRD071K21L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

• Resistance value: 1.21 kOhms (exact match required)
• Package type: 1206 (3216 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Operating temperature range: -55°C to 155°C minimum (exact match or better required)
• Automotive rating: AEC-Q200 (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

The identified substitute parts meet all mandatory parameters. Tolerance and power rating specifications may vary within acceptable ranges for the application. Temperature coefficient improvements are permitted as they represent enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with full AEC-Q200 automotive qualification and ROHS3 compliance. Selection among ERA-8AEB1211V, RG3216P-1211-B-T5, and RT1206BRD071K21L should be based on application-specific requirements and supply chain considerations.

ERA-8AEB1211V (Panasonic) offers the highest inventory availability at 20,504 units with improved tolerance (±0.1%) and reduced temperature coefficient (±25ppm/°C).

RG3216P-1211-B-T5 (Susumu) provides anti-sulfur protection in addition to standard AEC-Q200 specifications, with 5,801 units available and the lowest maximum seated height (0.020").

RT1206BRD071K21L (YAGEO) delivers improved tolerance and temperature coefficient performance with 5,875 units in stock.

All substitute parts operate within the same temperature range and maintain identical resistance values and package dimensions suitable for direct board-level replacement.

Frequently Asked Questions (FAQ)

Q: Can ERA-8AEB1211V replace RNCF1206DKC1K21 in automotive applications?

A: Yes. ERA-8AEB1211V meets all mandatory substitution criteria including 1.21 kOhms resistance, 1206 package, thin film composition, -55°C to 155°C operating range, and AEC-Q200 automotive qualification. The improved tolerance (±0.1% versus ±0.5%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C) represent enhanced performance characteristics.

Q: What is the difference between RG3216P-1211-B-T5 and other substitutes?

A: RG3216P-1211-B-T5 includes anti-sulfur protection as an additional feature. All other electrical and mechanical parameters align with substitute part specifications. The anti-sulfur feature provides enhanced environmental resistance in specific application environments.

Q: Are all substitute parts pin-compatible with the original RNCF1206DKC1K21?

A: Yes. All substitute parts use identical 1206 (3216 Metric) package configuration with two terminations, enabling direct board-level replacement without layout modifications.

Q: Can I use a substitute part with lower power rating (0.25W versus 0.333W)?

A: Substitution with lower power rating parts is permissible only if circuit design ensures power dissipation does not exceed the substitute part's 0.25W rating. Application thermal analysis is required to confirm compatibility.

Q: Do all substitute parts maintain the same temperature coefficient as the original?

A: No. All substitute parts feature ±25ppm/°C temperature coefficient compared to the original ±50ppm/°C specification. This represents improved temperature stability and is acceptable for direct substitution.