RN732ATTD4120A10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4120A10 is a 412 Ohms ±0.05% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features moisture-resistant construction with a temperature coefficient of ±10ppm/°C and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	Value
Resistance	412 Ohms
Tolerance	±0.05%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±10ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4120A10 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Resistance value: 412 Ohms (exact match required)
Tolerance: ±0.05% (exact match required)
Package format: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Temperature coefficient: ±10ppm/°C or better (lower values acceptable)
Operating temperature range: Minimum -55°C ~ 155°C (equal or extended range acceptable)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)

Allowable Variation:

Power rating: Substitutes rated at 0.125W (1/8W) or higher are acceptable, as higher power ratings provide equal or superior thermal performance within the same package footprint
Temperature coefficient: Values of ±5ppm/°C represent improved performance and are acceptable
Additional features (Automotive AEC-Q200, Anti-Sulfur, Anti-Corrosive, Flame Proof) do not disqualify substitutes

Substitute parts are grouped into two categories: direct equivalents (matching 0.1W power rating) and upgrades (higher power ratings or enhanced features within the same package).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	AEC-Q200
RN732ATTD4120A10	KOA Speer	412 Ω	±0.05%	0.1	±10	-55 ~ 155	Obsolete	No
RN73R2ATTD4120A10	KOA Speer	412 Ω	±0.05%	0.125	±10	-55 ~ 155	Active	Yes
RT0805WRB07412RL	YAGEO	412 Ω	±0.05%	0.125	±10	-55 ~ 155	Active	No
PLTT0805Z4120AGT5	Vishay Dale	412 Ω	±0.05%	0.25	±5	-55 ~ 215	Active	No
RG2012N-4120-W-T1	Susumu	412 Ω	±0.05%	0.125	±10	-55 ~ 155	Active	Yes
RG2012N-4120-W-T5	Susumu	412 Ω	±0.05%	0.125	±10	-55 ~ 155	Active	Yes
RG2012V-4120-W-T1	Susumu	412 Ω	±0.05%	0.125	±5	-55 ~ 155	Active	Yes
RG2012V-4120-W-T5	Susumu	412 Ω	±0.05%	0.125	±5	-55 ~ 155	Active	Yes
TNPU0805412RAZEN00	Vishay Dale	412 Ω	±0.05%	0.125	±5	-55 ~ 125	Active	Yes

Engineering Selection Recommendations

For Direct Replacement (Same Power Rating): No active substitute parts are available with the exact 0.1W power rating. The RN732ATTD4120A10 is obsolete with no direct equivalent from the same manufacturer.

For Functional Substitution (Higher Power Rating - Recommended):

All listed substitute parts meet or exceed the electrical specifications of the original component through higher power ratings (0.125W or 0.25W) within the identical 0805 package footprint. Selection among substitutes is based on product status and compliance certifications:

RN73R2ATTD4120A10 (KOA Speer, Active): Maintains manufacturer continuity from the original KOA Speer Electronics line. Includes Automotive AEC-Q200 certification. Identical operating temperature range and temperature coefficient to original.
RG2012V-4120-W-T1 / RG2012V-4120-W-T5 (Susumu, Active): Both feature improved temperature coefficient (±5ppm/°C), Automotive AEC-Q200 certification, and Anti-Sulfur construction. Identical operating temperature range. Functionally superior to original specifications.
RG2012N-4120-W-T1 / RG2012N-4120-W-T5 (Susumu, Active): Automotive AEC-Q200 certified with Anti-Sulfur features. Maintain ±10ppm/°C temperature coefficient matching original. Identical operating temperature range.
TNPU0805412RAZEN00 (Vishay Dale, Active): Automotive AEC-Q200 certified with improved temperature coefficient (±5ppm/°C) and Anti-Sulfur construction. Operating temperature range limited to -55°C ~ 125°C (narrower than original).
RT0805WRB07412RL (YAGEO, Active): Standard thin film construction without automotive certification. Maintains ±10ppm/°C temperature coefficient and full -55°C ~ 155°C operating range.
PLTT0805Z4120AGT5 (Vishay Dale, Active): Highest power rating (0.25W) with extended operating temperature range (-55°C ~ 215°C) and improved temperature coefficient (±5ppm/°C). Includes Anti-Corrosive and Flame Proof features.

All substitutes maintain ROHS3 compliance, MSL 1 (Unlimited) rating, and identical package dimensions.

Frequently Asked Questions (FAQ)

Q: Can I use a 0.125W (1/8W) resistor in place of the 0.1W (1/10W) RN732ATTD4120A10?

A: Yes. The 0.125W rating provides higher power dissipation capability within the same 0805 package footprint. This represents a functional upgrade with no compatibility issues. The resistor will operate at lower junction temperature under identical load conditions.

Q: What is the difference between RG2012N and RG2012V series from Susumu?

A: Both series are 412 Ohms ±0.05% thin film resistors in 0805 package with Automotive AEC-Q200 certification and Anti-Sulfur features. The primary difference is temperature coefficient: RG2012N maintains ±10ppm/°C (matching the original), while RG2012V offers improved ±5ppm/°C performance. Both operate across -55°C ~ 155°C.

Q: Is the TNPU0805412RAZEN00 suitable for applications requiring the full -55°C ~ 155°C range?

A: The TNPU0805412RAZEN00 operates across -55°C ~ 125°C, which is narrower than the original -55°C ~ 155°C range. This substitute is suitable only for applications where the maximum operating temperature does not exceed 125°C.

Q: Do all substitute parts have identical physical dimensions to the original?

A: All substitute parts use the 0805 (2012 Metric) package format with identical length (0.079" / 2.00mm) and width (0.049" / 1.25mm). Height variations exist: original and most substitutes are 0.024" (0.60mm) maximum, while Susumu RG series parts are 0.020" (0.50mm) maximum, and Vishay PLTT is 0.033" (0.84mm) maximum. These height differences do not affect PCB layout compatibility.

Q: Which substitute offers the best performance improvement?

A: The PLTT0805Z4120AGT5 from Vishay Dale provides the most comprehensive performance enhancement: 0.25W power rating (2.5× original), extended operating temperature range to 215°C, improved ±5ppm/°C temperature coefficient, and additional Anti-Corrosive and Flame Proof features. However, this represents an upgrade specification and may not be necessary for all applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original component's environmental compliance profile.

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