RN732ATTD4071D100 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4071D100 is a 4.07 kOhms ±0.5% 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 ±100ppm/°C and operates across -55°C to 155°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	4.07 kOhms
Tolerance	±0.5%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4071D100 is determined by the following criteria:

Primary Compatibility Parameters:

Resistance value: 4.07 kOhms or 4.7 kOhms (within standard E-series tolerance bands)
Tolerance: ±0.5%
Package: 0805 (2012 Metric)
Composition: Thin Film
Operating temperature range: -55°C minimum to 155°C maximum
Moisture Sensitivity Level: 1 (Unlimited)
RoHS3 Compliance

Power Rating Consideration: The original part is rated at 0.1W (1/10W). Substitute parts with equal or higher power ratings (0.125W, 0.25W) are electrically compatible, as higher power ratings provide equivalent or superior thermal performance in the same package footprint.

Resistance Value Tolerance: The specified 4.07 kOhms value falls within the standard E24 series. Substitute parts rated at 4.7 kOhms represent the nearest standard E12 series value and are functionally equivalent for most circuit applications within the ±0.5% tolerance specification.

Substitute parts are grouped into two categories:

Category 1 - Direct Resistance Match (4.07 kOhms): RN73R2ATTD4071D100 (KOA Speer Electronics, Inc.) - Active product with enhanced automotive qualification

Category 2 - Nearest Standard Value (4.7 kOhms): AT0805DRE074K7L, MCU08050C4701DP500, RG2012N-472-D-T5, RG2012P-472-D-T5, RG2012V-472-D-T5, RNCF0805DKE4K70, RNCF0805DTC4K70, RNCF0805DTE4K70, RR1220P-472-D - Active products from multiple manufacturers with enhanced features and certifications

Parameter Comparison

Parameter	RN732ATTD4071D100	RN73R2ATTD4071D100	AT0805DRE074K7L	MCU08050C4701DP500	RG2012N-472-D-T5	RG2012P-472-D-T5	RG2012V-472-D-T5	RNCF0805DKE4K70	RNCF0805DTC4K70	RNCF0805DTE4K70	RR1220P-472-D
Resistance	4.07 kΩ	4.07 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ	4.7 kΩ
Tolerance	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Power Rating	0.1W	0.125W	0.125W	0.125W	0.125W	0.125W	0.125W	0.25W	0.25W	0.25W	0.1W
Package	0805	0805	0805	0805	0805	0805	0805	0805	0805	0805	0805
Composition	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film	Thin Film
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 125°C
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±50ppm/°C	±50ppm/°C	±10ppm/°C	±25ppm/°C	±5ppm/°C	±25ppm/°C	±50ppm/°C	±25ppm/°C	±25ppm/°C
Moisture Sensitivity Level	1	1	1	1	1	1	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Automotive Qualification	None	AEC-Q200	AEC-Q200	None	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200	None

Engineering Selection Recommendations

For Direct Replacement (4.07 kOhms):

RN73R2ATTD4071D100 is the primary direct substitute. This part maintains the exact 4.07 kOhms resistance value with identical tolerance and operating temperature range. It is an active product with AEC-Q200 automotive qualification, providing enhanced reliability over the obsolete original part. The increased power rating (0.125W vs. 0.1W) offers superior thermal margin within the same 0805 package footprint.

For Standard Value Substitution (4.7 kOhms):

When circuit design permits use of the nearest standard E12 series value (4.7 kOhms), multiple active alternatives are available:

RG2012V-472-D-T5 (Susumu): Offers the lowest temperature coefficient (±5ppm/°C) with AEC-Q200 qualification, suitable for precision applications requiring minimal drift across the operating temperature range.
RG2012N-472-D-T5 (Susumu): Provides ±10ppm/°C temperature coefficient with AEC-Q200 qualification and highest inventory availability (5649 pcs), appropriate for general automotive and industrial applications.
RG2012P-472-D-T5 (Susumu): Delivers ±25ppm/°C temperature coefficient with AEC-Q200 qualification and extensive cross-reference compatibility.
RNCF0805DTE4K70 (Stackpole Electronics Inc): Rated at 0.25W with ±25ppm/°C temperature coefficient and AEC-Q200 qualification, offering maximum power headroom in the 0805 package with highest inventory (5898 pcs).
AT0805DRE074K7L (YAGEO): Features anti-sulfur construction with ±50ppm/°C temperature coefficient and AEC-Q200 qualification for corrosive environments.
MCU08050C4701DP500 (Vishay Beyschlag/Draloric/BC Components): Anti-sulfur thin film resistor with ±50ppm/°C temperature coefficient, suitable for professional-grade applications.
RR1220P-472-D (Susumu): Matches the original 0.1W power rating with ±25ppm/°C temperature coefficient, offering maximum inventory availability (89336 pcs) for high-volume applications. Operating temperature range extends to 125°C (vs. 155°C for other substitutes).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and 0805 package compatibility. Selection should be based on specific circuit requirements for temperature coefficient stability, power dissipation margin, automotive qualification necessity, and environmental resistance features.

Frequently Asked Questions (FAQ)

Q1: Can RN73R2ATTD4071D100 directly replace RN732ATTD4071D100?

A: Yes. RN73R2ATTD4071D100 is a direct functional equivalent with identical resistance (4.07 kOhms), tolerance (±0.5%), and operating temperature range (-55°C to 155°C). The higher power rating (0.125W vs. 0.1W) and AEC-Q200 qualification provide enhanced performance. Both parts use 0805 package with thin film construction and MSL 1 moisture sensitivity rating.

Q2: What is the difference between 4.07 kOhms and 4.7 kOhms substitutes?

A: The 4.07 kOhms value is a non-standard E24 series resistance. The 4.7 kOhms value is the nearest standard E12 series equivalent. For most circuit applications, this 15% difference is acceptable within normal design tolerances. Circuit-specific analysis is required to confirm compatibility in precision applications or where exact resistance matching is critical.

Q3: Why do substitute parts have different temperature coefficients?

A: Temperature coefficient (ppm/°C) indicates resistance drift across the operating temperature range. The original part specifies ±100ppm/°C. Substitute parts range from ±5ppm/°C to ±50ppm/°C, representing improved stability. Lower temperature coefficients reduce resistance variation across -55°C to 155°C, beneficial for precision circuits. Selection depends on circuit sensitivity to resistance drift.

Q4: Are all substitute parts AEC-Q200 qualified?

A: No. RR1220P-472-D and MCU08050C4701DP500 lack AEC-Q200 qualification. All other substitutes carry AEC-Q200 automotive qualification. For automotive applications, select only AEC-Q200 qualified parts: RN73R2ATTD4071D100, AT0805DRE074K7L, RG2012N-472-D-T5, RG2012P-472-D-T5, RG2012V-472-D-T5, RNCF0805DKE4K70, RNCF0805DTC4K70, or RNCF0805DTE4K70.

Q5: What is the significance of anti-sulfur features in some substitutes?

A: Anti-sulfur construction protects resistor elements from corrosion in high-sulfur environments. AT0805DRE074K7L and MCU08050C4701DP500 include this feature. For standard industrial or consumer applications without sulfur exposure, this feature is not required. For applications in corrosive or high-pollution environments, anti-sulfur variants provide extended reliability.

Q6: Can I use 0.25W rated parts (RNCF series) instead of 0.1W?

A: Yes. Higher power ratings are compatible. RNCF0805DKE4K70, RNCF0805DTC4K70, and RNCF0805DTE4K70 are rated at 0.25W in the same 0805 package. This provides superior thermal margin and reliability. Physical dimensions remain identical (0.079" L x 0.049" W), ensuring PCB layout compatibility. Use higher power ratings when thermal performance or reliability margin is a design priority.

Q7: What packaging formats are available for substitutes?

A: Substitute parts are supplied in Tape & Reel (TR) format, except RR1220P-472-D which is available in Cut Tape (CT) & Digi-Reel® format. Tape & Reel packaging is standard for automated assembly. Cut Tape format is suitable for manual assembly or small-quantity applications. Confirm packaging compatibility with assembly equipment specifications.

Q8: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q9: Which substitute offers the best inventory availability?

A: RR1220P-472-D (Susumu) provides the highest inventory with 89,336 pieces in stock. For immediate availability with automotive qualification, RNCF0805DTE4K70 (Stackpole Electronics Inc) offers 5,898 pieces. RG2012P-472-D-T5 (Susumu) provides 5,705 pieces. Inventory levels should be confirmed with current supplier data before final procurement decisions.

Q10: How do I select between multiple 4.7 kOhms substitutes?

A: Selection criteria: (1) Temperature coefficient requirement - choose RG2012V-472-D-T5 for ±5ppm/°C precision, RG2012N-472-D-T5 for ±10ppm/°C, or RG2012P-472-D-T5 for ±25ppm/°C; (2) Power margin - select RNCF series for 0.25W if thermal headroom is needed; (3) Environmental resistance - choose AT0805DRE074K7L or MCU08050C4701DP500 for anti-sulfur protection; (4) Inventory - RR1220P-472-D for maximum availability; (5) Automotive requirement - all except RR1220P-472-D and MCU08050C4701DP500 carry AEC-Q200 qualification.

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