RN732ATTD4123F25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4123F25 is a 412 kOhms ±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 ±25ppm/°C and operates across the -55°C to 155°C temperature range. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

The RN732ATTD4123F25 is classified as Obsolete. Equivalent and substitute parts are available from active product lines that maintain the same electrical specifications and mechanical compatibility, ensuring continued design support and procurement availability.

Key Parameters

Parameter	Value
Resistance	412 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4123F25 is determined by strict adherence to the following electrical and mechanical parameters:

Core Compatibility Requirements:

Resistance value: 412 kOhms (exact match required)
Package format: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Temperature coefficient: ±25ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)
Temperature range: -55°C ~ 155°C (exact match required)

Allowable Parameter Variations:

Tolerance: May be equal to or tighter than ±1% (±1%, ±0.5%, ±0.25%, ±0.1% are acceptable)
Power rating: May be equal to or greater than 0.1W (0.1W, 0.125W, 0.25W, 0.63W are acceptable)
Moisture resistance: May be maintained or enhanced
RoHS compliance: ROHS3 compliant required
MSL rating: 1 (Unlimited) required

Substitute parts are grouped into two categories:

Direct Substitutes (Same Power Rating - 0.1W or 0.125W): Parts that maintain the original power specification or provide minimal increase, suitable for direct replacement without circuit re-evaluation.

Upgrade Substitutes (Higher Power Rating or Tighter Tolerance): Parts that exceed the original specifications in power handling or tolerance accuracy, providing enhanced performance margins while maintaining full backward compatibility.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Temp Range	Status	RoHS
RN732ATTD4123F25	KOA Speer	412 kΩ	±1%	0.1	0805	±25ppm/°C	-55~155°C	Obsolete	ROHS3
RN73R2ATTD4123F25	KOA Speer	412 kΩ	±1%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
RT0805FRD07412KL	YAGEO	412 kΩ	±1%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
5-2176094-2	TE Connectivity	412 kΩ	±0.1%	0.25	0805	±25ppm/°C	-55~155°C	Active	ROHS3
AT0805BRD07412KL	YAGEO	412 kΩ	±0.1%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
AT0805CRD07412KL	YAGEO	412 kΩ	±0.25%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
AT0805DRD07412KL	YAGEO	412 kΩ	±0.5%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
CPF0805B412KE1	TE Connectivity	412 kΩ	±0.1%	0.1	0805	±25ppm/°C	-55~155°C	Active	ROHS3
ERA-6AEB4123V	Panasonic	412 kΩ	±0.1%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3
PHP00805E4123BBT1	Vishay Dale	412 kΩ	±0.1%	0.63	0805	±25ppm/°C	-55~155°C	Active	Non-compliant
RG2012P-4123-B-T5	Susumu	412 kΩ	±0.1%	0.125	0805	±25ppm/°C	-55~155°C	Active	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Recommended for Drop-In Replacement):

RN73R2ATTD4123F25 (KOA Speer) and RT0805FRD07412KL (YAGEO) are direct substitutes maintaining ±1% tolerance with 0.125W power rating. Both are Active products with ROHS3 compliance. RN73R2ATTD4123F25 includes Automotive AEC-Q200 qualification, suitable for automotive applications. RT0805FRD07412KL provides standard industrial-grade performance.

Upgrade Substitutes with Tighter Tolerance (±0.1%):

AT0805BRD07412KL (YAGEO), ERA-6AEB4123V (Panasonic), and RG2012P-4123-B-T5 (Susumu) provide ±0.1% tolerance with 0.125W rating. AT0805BRD07412KL and RG2012P-4123-B-T5 include Automotive AEC-Q200 qualification with anti-sulfur features. ERA-6AEB4123V includes Automotive AEC-Q200 qualification. These parts are suitable for applications requiring improved accuracy.

Upgrade Substitutes with Enhanced Power Rating:

5-2176094-2 (TE Connectivity) provides 0.25W power rating with ±0.1% tolerance, offering increased thermal margin. CPF0805B412KE1 (TE Connectivity) maintains the original 0.1W power rating with ±0.1% tolerance, providing accuracy improvement without power increase. PHP00805E4123BBT1 (Vishay Dale) offers 0.63W power rating with ±0.1% tolerance, flame-proof and safety-rated construction; however, this part is RoHS non-compliant and should be selected only when RoHS exemption is applicable.

Tolerance Variants:

AT0805CRD07412KL (±0.25%) and AT0805DRD07412KL (±0.5%) provide intermediate tolerance options with 0.125W rating and Automotive AEC-Q200 qualification, suitable for cost-optimized designs where tighter tolerance than ±1% is not required.

All recommended Active substitutes maintain ROHS3 compliance, MSL 1 rating, and -55°C to 155°C operating temperature range, ensuring full compatibility with the original RN732ATTD4123F25 specification.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4123F25 directly replace RN732ATTD4123F25 in my circuit?

A: Yes. RN73R2ATTD4123F25 maintains identical electrical specifications (412 kΩ, ±1%, ±25ppm/°C, -55°C to 155°C) and mechanical compatibility (0805 package). The 0.125W power rating exceeds the original 0.1W requirement, providing additional thermal margin. Both are thin film, moisture-resistant components with ROHS3 compliance.

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

A: Direct substitutes (RN73R2ATTD4123F25, RT0805FRD07412KL) maintain the original ±1% tolerance specification. Upgrade substitutes offer either tighter tolerance (±0.1%, ±0.25%, ±0.5%) or higher power ratings (0.25W, 0.63W) while maintaining full backward compatibility. Upgrade substitutes are suitable when improved accuracy or thermal performance is beneficial.

Q: Are all substitute parts automotive-qualified?

A: Not all. Automotive AEC-Q200 qualification is present in RN73R2ATTD4123F25, AT0805BRD07412KL, AT0805CRD07412KL, AT0805DRD07412KL, ERA-6AEB4123V, and RG2012P-4123-B-T5. RT0805FRD07412KL, 5-2176094-2, and CPF0805B412KE1 do not carry AEC-Q200 qualification. Select AEC-Q200 qualified parts for automotive applications.

Q: Can I use PHP00805E4123BBT1 as a substitute?

A: PHP00805E4123BBT1 meets all electrical and mechanical specifications (412 kΩ, ±0.1%, 0805 package, -55°C to 155°C). However, this part is RoHS non-compliant. Use only if your application has specific RoHS exemption requirements or operates in regions where RoHS compliance is not mandated.

Q: What is the significance of the 0.1W versus 0.125W power rating difference?

A: Both ratings are acceptable substitutes. The 0.1W rating matches the original specification exactly. The 0.125W rating provides 25% additional power dissipation capacity, offering improved thermal margin without affecting circuit operation. Selection depends on thermal design requirements and cost considerations.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating, identical to the original RN732ATTD4123F25. This ensures equivalent handling and storage requirements.

Q: Which substitute offers the best tolerance accuracy?

A: Multiple parts offer ±0.1% tolerance: 5-2176094-2, AT0805BRD07412KL, CPF0805B412KE1, ERA-6AEB4123V, PHP00805E4123BBT1, and RG2012P-4123-B-T5. Selection among these should be based on additional requirements such as automotive qualification, power rating, or RoHS compliance status.

Q: Are there any height or dimensional differences between substitutes?

A: Most substitutes maintain 0.024" (0.60mm) maximum seated height, matching the original. Exceptions include 5-2176094-2 and CPF0805B412KE1 at 0.026" (0.65mm), and PHP00805E4123BBT1 at 0.033" (0.84mm). Verify PCB layout clearance if height-constrained applications are involved.

Q: What is the temperature coefficient specification and why is it important?

A: All parts maintain ±25ppm/°C temperature coefficient, ensuring resistance value stability across the -55°C to 155°C operating range. This specification is critical for precision analog circuits and temperature-compensated applications. No variation is permitted among acceptable substitutes.

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