RT1206FRE0749K9L Equivalent & Substitute Parts

Part Overview

The RT1206FRE0749K9L is a 49.9 kOhms ±1% thin film chip resistor manufactured by YAGEO in the 1206 (3216 Metric) package format. This component is rated for 0.25W power dissipation and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent resistance values, package dimensions, and electrical ratings can be maintained while potentially offering improved tolerance, power ratings, or automotive qualification.

Substiute Parts

RT1206FRE0749K9L

YAGEOIn Stock: 5888RT1206FRE0749K9L Datasheet

Current PartRFQ

ERA-8AEB4992V

Panasonic Electronic ComponentsIn Stock: 16002ERA-8AEB4992V Datasheet

UpgradeRFQ

TNPW120649K9BEEA

Vishay DaleIn Stock: 11062TNPW120649K9BEEA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT1206FRE0749K9L are qualified based on the following criteria:

Mandatory Matching Parameters:

• Resistance value: 49.9 kOhms (exact match required)
• Package / Case: 1206 (3216 Metric) (physical and electrical compatibility)
• Composition: Thin Film (electrical performance characteristics)
• Number of Terminations: 2 (functional equivalence)

Allowable Variations:

• Tolerance: May be equal to or tighter than ±1%
• Power Rating: May be equal to or greater than 0.25W
• Temperature Coefficient: May be equal to or lower in absolute value
• Operating Temperature: May extend the upper or lower limits
• Features: May include additional certifications (AEC-Q200, Anti-Sulfur, Moisture Resistant)

The identified substitutes maintain all mandatory parameters while offering enhanced specifications in tolerance, power handling, or automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

ERA-8AEB4992V (Panasonic Electronic Components): This substitute provides tighter tolerance (±0.1% versus ±1%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C) while maintaining identical power rating and operating temperature range. AEC-Q200 automotive qualification is included. Physical dimensions are within acceptable tolerance (3.20mm L × 1.60mm W versus 3.10mm L × 1.60mm W). This part is suitable for applications requiring improved accuracy and automotive-grade reliability.

TNPW120649K9BEEA (Vishay Dale): This substitute offers the highest power rating (0.52W versus 0.25W), extended operating temperature range (-55°C to 175°C versus -55°C to 155°C), and tighter tolerance (±0.1%). Additional features include Anti-Sulfur and Moisture Resistant properties with AEC-Q200 qualification. Physical dimensions match the Panasonic substitute. This part is recommended for applications with higher thermal stress or extended temperature requirements.

Both substitutes maintain full RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can ERA-8AEB4992V or TNPW120649K9BEEA be used as direct replacements for RT1206FRE0749K9L?

A: Yes. Both substitutes maintain the 49.9 kOhms resistance value, 1206 package format, and thin film composition. Physical dimensions are compatible with standard 1206 PCB footprints. The tighter tolerance and lower temperature coefficient of the substitutes provide equal or improved performance.

Q: What is the significance of the tolerance difference (±1% versus ±0.1%)?

A: Tolerance defines the maximum deviation from the nominal resistance value. The RT1206FRE0749K9L allows ±1% deviation (49.01 kOhms to 50.79 kOhms), while both substitutes allow ±0.1% deviation (49.85 kOhms to 49.95 kOhms). Tighter tolerance is suitable for precision circuits requiring stable resistance values.

Q: Why does TNPW120649K9BEEA have a higher power rating (0.52W versus 0.25W)?

A: Power rating indicates maximum continuous power dissipation without exceeding temperature limits. The higher rating provides thermal margin in applications with elevated current or ambient temperature conditions. The 1206 package dimensions remain identical; the increased rating reflects improved thermal design.

Q: Are the physical dimension differences between parts significant?

A: The RT1206FRE0749K9L measures 3.10mm L × 1.60mm W, while both substitutes measure 3.20mm L × 1.60mm W. This 0.10mm length difference is within standard PCB footprint tolerance for 1206 components and does not affect placement or soldering.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry standard for passive components. It certifies that the part meets reliability and performance requirements for automotive applications, including thermal cycling, vibration, and humidity resistance testing.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the circuit design does not depend on the specific tolerance or temperature coefficient of the original part. If the design requires ±1% tolerance specifically, the substitutes' ±0.1% tolerance will not cause functional issues. If the design requires ±50ppm/°C temperature coefficient specifically, the substitutes' ±25ppm/°C coefficient will provide improved stability.