RN732ATTD90R9B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD90R9B50 is a 90.9 Ohm ±0.1% thin film chip resistor manufactured by KOA Speer Electronics in 0805 (2012 Metric) package format with 0.1W power rating. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement continuity. Substitute parts maintain the core electrical specifications while offering enhanced features, improved availability, or upgraded performance characteristics within the same package footprint.

Key Parameters

Parameter	Value
Resistance	90.9 Ohms
Tolerance	±0.1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the RN732ATTD90R9B50:

Direct Substitutes (Same Power Rating - 0.1W): Parts maintaining identical 0.1W power rating with matching 90.9 Ohm resistance, ±0.1% tolerance, 0805 package, and thin film composition. These components provide direct functional equivalence.

Upgrade Substitutes (Enhanced Power Rating - 0.125W, 0.2W, or 0.25W): Parts with increased power ratings (0.125W, 0.2W, or 0.25W) while maintaining all other critical parameters: 90.9 Ohm resistance, ±0.1% tolerance, 0805 package, and thin film composition. Higher power ratings provide thermal margin and operational headroom in the same physical footprint.

Substitution Criteria:

Resistance value: 90.9 Ohms (exact match required)
Tolerance: ±0.1% (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Temperature Coefficient: ±25ppm/°C to ±50ppm/°C (acceptable range)
Operating Temperature: -55°C minimum to 125°C minimum (acceptable)
RoHS3 Compliance: Required
MSL Rating: 1 (Unlimited) (acceptable)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance (Ohms)	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Temp Range (°C)	Product Status	Features
RN732ATTD90R9B50	KOA Speer Electronics	90.9	±0.1%	0.1	±50	-55 ~ 155	Obsolete	Moisture Resistant
RN73R2ATTD90R9B50	KOA Speer Electronics	90.9	±0.1%	0.125	±50	-55 ~ 155	Active	Automotive AEC-Q200, Moisture Resistant
RT0805BRE0790R9L	YAGEO	90.9	±0.1%	0.125	±50	-55 ~ 155	Active	Thin Film
2-2176091-0	TE Connectivity Passive Product	90.9	±0.1%	0.25	±25	-55 ~ 155	Active	Thin Film
AT0805BRD0790R9L	YAGEO	90.9	±0.1%	0.125	±25	-55 ~ 155	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
CPF0805B90R9E1	TE Connectivity Passive Product	90.9	±0.1%	0.1	±25	-55 ~ 155	Active	Thin Film
CRT0805-BY-90R9ELF	Bourns Inc.	90.9	±0.1%	0.125	±25	-55 ~ 155	Active	Current Sense Thin Film
ERA-6AEB90R9V	Panasonic Electronic Components	90.9	±0.1%	0.125	±25	-55 ~ 155	Active	Automotive AEC-Q200
MCU08050D9099BP100	Vishay Beyschlag/Draloric/BC Components	90.9	±0.1%	0.125	±25	-55 ~ 125	Active	Anti-Sulfur
MCU08050D9099BP500	Vishay Beyschlag/Draloric/BC Components	90.9	±0.1%	0.125	±25	-55 ~ 125	Active	Anti-Sulfur
PAT0805E90R9BST1	Vishay Dale Thin Film	90.9	±0.1%	0.2	±25	-55 ~ 155	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant

Engineering Selection Recommendations

For Direct Replacement (Same Power Rating): CPF0805B90R9E1 (TE Connectivity Passive Product) is the primary direct substitute for RN732ATTD90R9B50. Both components share identical 0.1W power rating and 90.9 Ohm ±0.1% specifications in 0805 package. CPF0805B90R9E1 is active product status with improved temperature coefficient (±25ppm/°C versus ±50ppm/°C) and full RoHS3 compliance.

For Upgraded Performance (Enhanced Power Rating): When thermal margin or operational headroom is required, the following active substitutes provide increased power ratings within the same 0805 package footprint:

0.125W Rating: RN73R2ATTD90R9B50 (KOA Speer, Automotive AEC-Q200), RT0805BRE0790R9L (YAGEO), AT0805BRD0790R9L (YAGEO, Anti-Sulfur AEC-Q200), ERA-6AEB90R9V (Panasonic, Automotive AEC-Q200), MCU08050D9099BP100/BP500 (Vishay, Anti-Sulfur), CRT0805-BY-90R9ELF (Bourns, Current Sense)
0.2W Rating: PAT0805E90R9BST1 (Vishay Dale, Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant)
0.25W Rating: 2-2176091-0 (TE Connectivity, highest power capacity)

Selection Criteria by Application:

Automotive applications requiring AEC-Q200 certification: RN73R2ATTD90R9B50, AT0805BRD0790R9L, ERA-6AEB90R9V, PAT0805E90R9BST1
Corrosive environments requiring anti-sulfur protection: AT0805BRD0790R9L, MCU08050D9099BP100/BP500, PAT0805E90R9BST1
Current sensing applications: CRT0805-BY-90R9ELF
Maximum thermal performance: 2-2176091-0 (0.25W)
Standard industrial applications: RT0805BRE0790R9L, CPF0805B90R9E1

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and -55°C minimum operating temperature. Operating temperature maximum ranges from 125°C to 155°C depending on manufacturer specifications.

Frequently Asked Questions (FAQ)

Q: Can CPF0805B90R9E1 directly replace RN732ATTD90R9B50 without circuit modification? A: Yes. CPF0805B90R9E1 maintains identical electrical specifications (90.9 Ohms ±0.1%, 0.1W) and physical package (0805). The improved temperature coefficient (±25ppm/°C) provides enhanced stability. No circuit modifications are required.

Q: What is the advantage of selecting a substitute with higher power rating (0.125W, 0.2W, or 0.25W)? A: Higher power ratings provide thermal margin in the same physical footprint. This reduces junction temperature during operation, extends component lifespan, and improves reliability in applications approaching the original 0.1W limit. The 0805 package dimensions remain identical across all power ratings listed.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed maintain RoHS3 compliance status, matching the original RN732ATTD90R9B50 specification.

Q: Which substitute is recommended for automotive applications? A: For automotive applications, select parts with Automotive AEC-Q200 certification: RN73R2ATTD90R9B50, AT0805BRD0790R9L, ERA-6AEB90R9V, or PAT0805E90R9BST1. These components meet automotive qualification standards.

Q: What is the difference between ±50ppm/°C and ±25ppm/°C temperature coefficient? A: Temperature coefficient defines resistance change per degree Celsius. ±25ppm/°C provides tighter tolerance stability across temperature variations compared to ±50ppm/°C. For precision applications, ±25ppm/°C substitutes offer improved performance.

Q: Can MCU08050D9099BP100 and MCU08050D9099BP500 be used interchangeably? A: Yes. Both parts are electrically and mechanically identical (90.9 Ohms ±0.1%, 0.125W, 0805 package). The part number suffix indicates different tape reel quantities (100-piece and 500-piece reels). Selection depends on procurement quantity requirements only.

Q: Is moisture resistance a critical parameter for substitution? A: Moisture resistance is not a substitution-limiting parameter. The original RN732ATTD90R9B50 includes moisture resistance; however, substitute parts without explicit moisture resistance designation (such as RT0805BRE0790R9L) remain compatible. All parts maintain MSL 1 (Unlimited) rating, indicating minimal moisture sensitivity.

Q: What is the operating temperature range limitation for MCU series resistors? A: MCU08050D9099BP100 and MCU08050D9099BP500 operate from -55°C to 125°C, compared to 155°C maximum for other substitutes. Applications requiring operation above 125°C should select alternatives such as RN73R2ATTD90R9B50, RT0805BRE0790R9L, AT0805BRD0790R9L, ERA-6AEB90R9V, 2-2176091-0, CPF0805B90R9E1, CRT0805-BY-90R9ELF, or PAT0805E90R9BST1.

Q: Are there inventory considerations when selecting substitutes? A: Inventory levels vary by part number. ERA-6AEB90R9V (Panasonic) shows highest availability at 8,241 pieces. 2-2176091-0 (TE Connectivity) provides 1,730 pieces. Procurement should verify current inventory status with suppliers for production requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message