90.9 Ohm 0.5% 1/16W 0402 Chip Resistor Equivalent & Substitute Parts

Part Overview

The 9T04021A90R9DAHF3 is a 90.9 Ohms ±0.5% thin film chip resistor in 0402 (1005 Metric) package rated for 0.063W (1/16W) power dissipation. Manufactured by YAGEO under the RT series, this component is currently obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Resistance	90.9 Ohms
Tolerance	±0.5%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thin Film
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±100ppm/°C
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 9T04021A90R9DAHF3 is determined by the following critical parameters:

Resistance value: 90.9 Ohms (exact match required)
Tolerance: ±0.5% or better (tighter tolerance acceptable)
Power rating: 0.063W minimum (equal or higher acceptable)
Package: 0402 (1005 Metric) form factor (physical compatibility required)
Composition: Thin film construction
Operating temperature range: Must encompass -55°C to 155°C minimum
Moisture sensitivity: MSL 1 or better

Parts are grouped into two categories: direct substitutes (matching all primary specifications) and upgrade substitutes (improved performance characteristics while maintaining functional compatibility).

Parameter Comparison

Parameter	9T04021A90R9DAHF3 (Main)	RT0402DRD0790R9L	RR0510R-90R9-D	TNPW040290R9BETD
Manufacturer	YAGEO	YAGEO	Susumu	Vishay Dale
Series	RT	RT	RR	TNPW
Resistance	90.9 Ohms	90.9 Ohms	90.9 Ohms	90.9 Ohms
Tolerance	±0.5%	±0.5%	±0.5%	±0.1%
Power Rating	0.063W	0.063W	0.063W	0.063W
Package	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)
Composition	Thin Film	Thin Film	Thin Film	Thin Film
Temperature Coefficient	±100ppm/°C	±25ppm/°C	±100ppm/°C	±25ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 125°C	-55°C ~ 125°C
Height - Seated (Max)	0.014" (0.35mm)	0.014" (0.35mm)	0.016" (0.40mm)	0.016" (0.40mm)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	Non-compliant

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

RT0402DRD0790R9L (YAGEO) and RR0510R-90R9-D (Susumu) are direct functional equivalents. Both maintain the 90.9 Ohms ±0.5% specification, 0402 package, and thin film composition. RT0402DRD0790R9L offers improved temperature coefficient (±25ppm/°C vs. ±100ppm/°C) and maintains the full -55°C to 155°C operating range. RR0510R-90R9-D operates to 125°C maximum, which is acceptable for most applications but represents a reduced upper temperature limit. Both substitute parts are ROHS3 compliant and currently in active production status.

Upgrade Substitute (Enhanced Performance):

TNPW040290R9BETD (Vishay Dale) provides superior tolerance (±0.1% vs. ±0.5%) and improved temperature coefficient (±25ppm/°C). This military-grade thin film resistor is suitable for applications requiring tighter tolerance control. Operating temperature range is -55°C to 125°C. This part is RoHS non-compliant but REACH affected, requiring compliance verification for specific applications.

Compliance Considerations:

For applications requiring RoHS3 compliance, RT0402DRD0790R9L or RR0510R-90R9-D are appropriate selections. For applications requiring maximum temperature operation to 155°C, RT0402DRD0790R9L is the preferred choice among active production parts.

Frequently Asked Questions (FAQ)

Q: Can RT0402DRD0790R9L replace 9T04021A90R9DAHF3 in all applications?

A: Yes, RT0402DRD0790R9L is a direct functional equivalent. It maintains identical resistance, tolerance, power rating, and package specifications. The improved temperature coefficient (±25ppm/°C) and full -55°C to 155°C operating range make it suitable for all applications previously using the obsolete part.

Q: What is the difference between the direct substitutes and the upgrade substitute?

A: Direct substitutes (RT0402DRD0790R9L and RR0510R-90R9-D) match the original ±0.5% tolerance specification. The upgrade substitute TNPW040290R9BETD offers tighter ±0.1% tolerance and improved temperature coefficient, suitable for precision applications. Selection depends on application tolerance requirements.

Q: Does the height difference between 0.014" and 0.016" affect PCB compatibility?

A: The 0.002" (0.05mm) height difference is within typical PCB assembly tolerances for 0402 components. Both heights are acceptable for standard surface mount assembly processes. Verify with your assembly partner if height-critical applications exist.

Q: Are there temperature range limitations when substituting?

A: RR0510R-90R9-D and TNPW040290R9BETD operate to 125°C maximum, compared to the original 155°C upper limit. For applications requiring operation above 125°C, RT0402DRD0790R9L is the appropriate selection.

Q: Which substitute part should be selected for new designs?

A: RT0402DRD0790R9L is recommended for new designs. It is YAGEO RT series (same manufacturer family as the original), maintains full temperature range, offers improved temperature coefficient, and is ROHS3 compliant with active production status.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message