RT0805FRE0721KL Equivalent & Substitute Parts

Part Overview

The RT0805FRE0721KL is a 21 kOhms ±1% thin film chip resistor in 0805 (2012 Metric) package rated at 0.125W (1/8W) power dissipation. Manufactured by YAGEO and classified as Active product status, this component is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent resistance values, package dimensions, and power ratings are maintained while offering improved tolerance specifications or enhanced environmental certifications.

Substiute Parts

RT0805FRE0721KL

YAGEOIn Stock: 972RT0805FRE0721KL Datasheet

Current PartRFQ

RT0805BRD0721KL

YAGEOIn Stock: 7421RT0805BRD0721KL Datasheet

UpgradeRFQ

RT0805DRE0721KL

YAGEOIn Stock: 1826RT0805DRE0721KL Datasheet

UpgradeRFQ

3-2176093-4

TE Connectivity Passive ProductIn Stock: 19343-2176093-4 Datasheet

DirectRFQ

ERA-6AEB2102V

Panasonic Electronic ComponentsIn Stock: 19644ERA-6AEB2102V Datasheet

UpgradeRFQ

RG2012P-2102-B-T5

SusumuIn Stock: 1251RG2012P-2102-B-T5 Datasheet

UpgradeRFQ

RP73D2A21KBTDF

TE Connectivity Passive ProductIn Stock: 949RP73D2A21KBTDF Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

• Resistance value: 21 kOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Operating temperature range: -55°C ~ 155°C minimum (exact match or better required)
• Moisture sensitivity level: 1 (Unlimited) (exact match or better required)

Secondary Compatibility Parameters:

• Tolerance: ±1% or better (tighter tolerance acceptable)
• Power rating: 0.125W minimum (equal or higher acceptable)
• Temperature coefficient: ±50ppm/°C or better (lower values acceptable)

Substitute parts are grouped into two categories: Upgrade substitutes (improved tolerance and/or temperature coefficient specifications) and Direct substitutes (equivalent or enhanced power ratings with improved tolerance).

Parameter Comparison

Engineering Selection Recommendations

ROHS3 Compliant Substitutes (Recommended for Standard Applications):

RT0805BRD0721KL, RT0805DRE0721KL, ERA-6AEB2102V, RG2012P-2102-B-T5, and RP73D2A21KBTDF all maintain ROHS3 compliance equivalent to the primary part. RT0805BRD0721KL and RT0805DRE0721KL are YAGEO products within the same RT series, offering improved tolerance specifications (±0.1% and ±0.5% respectively) while maintaining identical package and power specifications.

Automotive-Qualified Alternatives:

ERA-6AEB2102V (Panasonic) and RG2012P-2102-B-T5 (Susumu) carry AEC-Q200 automotive qualification. RG2012P-2102-B-T5 includes anti-sulfur protection. These are suitable for applications requiring automotive-grade reliability and environmental resistance.

Enhanced Temperature Stability:

RP73D2A21KBTDF offers the lowest temperature coefficient (±15ppm/°C) among all substitutes, providing superior stability across the operating temperature range.

Non-Compliant Alternative:

3-2176093-4 (TE Connectivity) is RoHS non-compliant and should be selected only when legacy component compatibility or specific design constraints require this part. It offers higher power rating (0.25W) if thermal headroom is a design requirement.

Frequently Asked Questions (FAQ)

Q: Can RT0805BRD0721KL replace RT0805FRE0721KL in my design?

A: Yes. Both parts share identical resistance (21 kOhms), package (0805), power rating (0.125W), and operating temperature range (-55°C ~ 155°C). RT0805BRD0721KL provides improved tolerance (±0.1% vs ±1%) and lower temperature coefficient (±25ppm/°C vs ±50ppm/°C), making it a direct upgrade.

Q: What is the difference between the YAGEO RT series substitutes?

A: RT0805FRE0721KL (±1% tolerance, ±50ppm/°C) is the base specification. RT0805DRE0721KL improves tolerance to ±0.5% while maintaining ±50ppm/°C temperature coefficient. RT0805BRD0721KL offers the tightest tolerance (±0.1%) with improved temperature coefficient (±25ppm/°C).

Q: Are automotive-qualified parts (ERA-6AEB2102V, RG2012P-2102-B-T5) interchangeable with standard parts?

A: Yes, from an electrical and mechanical standpoint. Both automotive-qualified substitutes maintain the same 21 kOhms resistance, 0805 package, 0.125W power rating, and -55°C ~ 155°C operating range. Selection depends on application requirements for AEC-Q200 certification and environmental protection (anti-sulfur coating in RG2012P-2102-B-T5).

Q: Why is 3-2176093-4 marked as RoHS non-compliant?

A: 3-2176093-4 is a legacy TE Connectivity part that does not meet ROHS3 compliance standards. It should be used only when design constraints or system compatibility specifically require this component. It offers higher power dissipation (0.25W vs 0.125W) if thermal requirements exceed standard specifications.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient indicates resistance value drift across the operating temperature range. Lower values (±15ppm/°C in RP73D2A21KBTDF vs ±50ppm/°C in RT0805FRE0721KL) mean more stable resistance performance across temperature extremes. Selection depends on circuit precision requirements.

Q: Can I use a higher power-rated part (3-2176093-4 at 0.25W) in place of the 0.125W rated part?

A: Yes, mechanically and electrically. The 0805 package dimensions remain identical. Higher power rating provides additional thermal margin but does not affect electrical performance. Verify PCB thermal design accommodates the component if upgrading power rating.

Q: Are all substitutes available in Tape & Reel packaging?

A: Most substitutes are available in Tape & Reel (TR) packaging. ERA-6AEB2102V is available in Cut Tape (CT) & Digi-Reel® packaging. Verify packaging format matches your procurement and assembly requirements.