RN732ATTD2003B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD2003B50 is a 200 kOhms ±0.1% 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 ±50ppm/°C and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement continuity.

Key Parameters

Parameter	Value
Resistance	200 kOhms
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
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD2003B50 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Resistance value: 200 kOhms
Tolerance: ±0.1%
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Operating Temperature Range: -55°C ~ 155°C
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Power Rating: Substitutes may equal or exceed 0.1W (higher power ratings are acceptable for drop-in replacement)
Temperature Coefficient: May vary (±10ppm/°C to ±50ppm/°C acceptable)
Features: Additional features (Automotive AEC-Q200, Anti-Sulfur, Current Sense) do not preclude substitution

Substitute parts are grouped into two categories:

Direct Substitutes (Equal or Higher Power Rating): Parts with identical or superior power ratings that maintain full functional compatibility.

Upgrade Substitutes (Enhanced Specifications): Parts with improved temperature coefficients, automotive certifications, or additional protective features while maintaining core electrical parameters.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Features	Status
RN732ATTD2003B50	KOA Speer	200k	±0.1%	0.1	±50	-55 ~ 155	Moisture Resistant	Obsolete
RN73R2ATTD2003B50	KOA Speer	200k	±0.1%	0.125	±50	-55 ~ 155	Automotive AEC-Q200, Moisture Resistant	Active
RT0805BRE07200KL	YAGEO	200k	±0.1%	0.125	±50	-55 ~ 155	Thin Film	Active
2-2176094-3	TE Connectivity	200k	±0.1%	0.25	±25	-55 ~ 155	Thin Film	Active
4-1879357-3	TE Connectivity	200k	±0.1%	0.1	±10	-55 ~ 155	Thin Film	Active
AT0805BRD07200KL	YAGEO	200k	±0.1%	0.125	±25	-55 ~ 155	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
CPF-A-0805B200KE	TE Connectivity	200k	±0.1%	0.1	±25	-55 ~ 155	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
CPF-A-0805B200KE1	TE Connectivity	200k	±0.1%	0.1	±25	-55 ~ 155	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
CPF0805B200KE1	TE Connectivity	200k	±0.1%	0.1	±25	-55 ~ 155	Thin Film	Active
CRT0805-BY-2003ELF	Bourns Inc.	200k	±0.1%	0.125	±25	-55 ~ 155	Current Sense	Active
ERA-6AEB204V	Panasonic	200k	±0.1%	0.125	±25	-55 ~ 155	Automotive AEC-Q200	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

Select 4-1879357-3 (TE Connectivity) when exact power rating matching (0.1W) is required. This part maintains the same 0.1W power rating as the original RN732ATTD2003B50 while offering superior temperature coefficient performance (±10ppm/°C versus ±50ppm/°C). Product status is active with ROHS3 compliance.

For Standard Industrial Applications:

Select RN73R2ATTD2003B50 (KOA Speer) as the primary equivalent. This part is from the same manufacturer as the original, maintains KOA's RN73 series lineage, and provides higher power rating (0.125W) with automotive AEC-Q200 certification. Active product status ensures long-term availability.

For Automotive and High-Reliability Applications:

Select AT0805BRD07200KL (YAGEO) or CPF-A-0805B200KE1 (TE Connectivity) for designs requiring automotive qualification. Both parts carry AEC-Q200 certification, anti-sulfur protection, and moisture resistance. Temperature coefficient is ±25ppm/°C, providing improved stability over the original ±50ppm/°C specification.

For General-Purpose Substitution:

Select RT0805BRE07200KL (YAGEO) or ERA-6AEB204V (Panasonic) for applications where automotive certification is not required. Both are active products with high inventory availability and standard thin film construction.

For Current Sensing Applications:

Select CRT0805-BY-2003ELF (Bourns Inc.) when current sensing functionality is required. This part is specifically designed for current sense applications while maintaining all core electrical parameters.

All recommended substitutes are ROHS3 compliant with MSL rating of 1 (Unlimited) and operate across the full -55°C to 155°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RN732ATTD2003B50 with a higher power-rated resistor?

A: Yes. Substitutes with power ratings of 0.125W (1/8W) or 0.25W (1/4W) are acceptable drop-in replacements. Higher power ratings do not affect circuit functionality and provide thermal margin. The 0805 package dimensions remain identical across all listed substitutes.

Q: What is the significance of the ±0.1% tolerance specification?

A: The ±0.1% tolerance is a critical parameter for precision analog circuits, signal conditioning, and measurement applications. All listed substitutes maintain this tolerance specification. This tolerance must not be compromised during substitution.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive applications?

A: Yes. Automotive-qualified parts exceed standard industrial specifications and are fully compatible with non-automotive designs. AEC-Q200 certification indicates enhanced reliability, extended temperature cycling validation, and stricter quality control. These parts may be used in any application requiring the base electrical specifications.

Q: What is the difference between temperature coefficient values?

A: Temperature coefficient (ppm/°C) indicates resistance value drift per degree Celsius change. The original part has ±50ppm/°C; substitute parts range from ±10ppm/°C to ±25ppm/°C. Lower values indicate better stability across temperature variations. For precision applications, select substitutes with ±25ppm/°C or better.

Q: Does the 0805 package dimension remain consistent across all substitutes?

A: Yes. All listed substitutes use the 0805 (2012 Metric) package format with identical footprint dimensions: 0.079" L × 0.049" W (2.00mm × 1.25mm). Height variations are minimal (0.024" to 0.026" seated maximum) and do not affect PCB assembly compatibility.

Q: What does "Moisture Resistant" mean in the feature specification?

A: Moisture resistance indicates the resistor construction includes protective measures against moisture ingress and corrosion. The original part and most substitutes carry MSL rating of 1 (Unlimited), meaning no moisture sensitivity precautions are required during storage or handling.

Q: Can I use the CPF0805B200KE1 in place of CPF-A-0805B200KE1?

A: Yes. The CPF0805B200KE1 is functionally equivalent to CPF-A-0805B200KE1 for standard applications. The primary difference is the absence of anti-sulfur and automotive AEC-Q200 features in the standard CPF version. Both maintain identical electrical specifications (200k, ±0.1%, 0.1W, ±25ppm/°C).

Q: Which substitute offers the best long-term availability?

A: ERA-6AEB204V (Panasonic) shows the highest current inventory (34,537 pcs) and is from a major global manufacturer with established supply chain infrastructure. CPF0805B200KE1 (TE Connectivity) also demonstrates strong availability (8,136 pcs). Both are active products with no planned obsolescence.

Q: Is RoHS3 compliance mandatory for all substitutes?

A: All listed substitutes are ROHS3 compliant. If your application requires RoHS compliance, all recommended parts meet this requirement. The original RN732ATTD2003B50 is also ROHS3 compliant.

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