RN732ATTD46R4F25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD46R4F25 is a 46.4 Ohms ±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 is classified as Obsolete product status. Due to its obsolete designation, equivalent and substitute parts with active product status are necessary for ongoing design support, procurement continuity, and new production requirements. Substitute parts maintain the same resistance value and package format while offering improved specifications, enhanced reliability features, or active manufacturing status.

Key Parameters

Parameter	Value
Resistance	46.4 Ohms
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 Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts are categorized based on the following substitution criteria:

Direct Substitutes (Same Specifications):

Resistance: 46.4 Ohms (exact match)
Tolerance: ±1% (exact match)
Power Rating: 0.1W or 0.125W (0.125W provides margin)
Package: 0805 (2012 Metric) (exact match)
Composition: Thin Film (exact match)
Temperature Coefficient: ±25ppm/°C (exact match)
Operating Temperature: -55°C ~ 155°C (exact match)
MSL: 1 (Unlimited) (exact match)
RoHS3 Compliant (exact match)

Upgrade Substitutes (Enhanced Specifications):

Improved tolerance (±0.1%, ±0.25%, ±0.5% vs. ±1%)
Higher power rating (0.125W, 0.25W vs. 0.1W)
Enhanced features (Automotive AEC-Q200, Anti-Sulfur)
Active product status (vs. Obsolete)
Improved temperature coefficient (±10ppm/°C vs. ±25ppm/°C)

All substitute parts maintain identical package dimensions, operating temperature range, and MSL rating. Substitution is valid when the substitute part meets or exceeds the original specifications.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Features	Product Status	AEC-Q200
RN732ATTD46R4F25	KOA Speer	46.4 Ω	±1%	0.1	±25	Moisture Resistant	Obsolete	—
RN73R2ATTD46R4F25	KOA Speer	46.4 Ω	±1%	0.125	±25	Automotive AEC-Q200, Moisture Resistant	Active	Yes
RT0805FRD0746R4L	YAGEO	46.4 Ω	±1%	0.125	±25	—	Active	—
9-1625868-1	TE Connectivity	46.4 Ω	±0.1%	0.25	±25	—	Active	—
AT0805BRD0746R4L	YAGEO	46.4 Ω	±0.1%	0.125	±25	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active	Yes
AT0805CRD0746R4L	YAGEO	46.4 Ω	±0.25%	0.125	±25	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active	Yes
AT0805DRD0746R4L	YAGEO	46.4 Ω	±0.5%	0.125	±25	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active	Yes
CPF0805B46R4E1	TE Connectivity	46.4 Ω	±0.1%	0.1	±25	—	Active	—
RN73C2A46R4BTDF	TE Connectivity	46.4 Ω	±0.1%	0.1	±10	—	Active	—
RNCF0805BKE46R4	Stackpole Electronics	46.4 Ω	±0.1%	0.25	±25	Automotive AEC-Q200	Active	Yes
RNCF0805BTE46R4	Stackpole Electronics	46.4 Ω	±0.1%	0.25	±25	Automotive AEC-Q200	Active	Yes

Engineering Selection Recommendations

For Direct Replacement (Minimum Specification Match):

RN73R2ATTD46R4F25 (KOA Speer) is the primary direct substitute. It maintains ±1% tolerance and 46.4 Ohms resistance with identical package dimensions. The upgrade to 0.125W power rating provides operational margin. Active product status and Automotive AEC-Q200 certification ensure long-term availability and reliability for automotive and industrial applications.

For Standard Industrial Applications:

RT0805FRD0746R4L (YAGEO) provides equivalent specifications with active status from an established manufacturer. This part is suitable for general-purpose applications requiring 46.4 Ohms ±1% at 0.125W in 0805 package.

For Precision Applications (Tolerance ±0.1%):

AT0805BRD0746R4L (YAGEO) offers improved tolerance specification (±0.1% vs. ±1%) while maintaining 0.125W power rating. Anti-Sulfur coating and Automotive AEC-Q200 certification provide enhanced environmental protection. This part is recommended for precision measurement circuits and automotive applications.

For Automotive Applications (AEC-Q200 Certified):

RNCF0805BKE46R4 or RNCF0805BTE46R4 (Stackpole Electronics) provide ±0.1% tolerance with 0.25W power rating and Automotive AEC-Q200 certification. These parts are suitable for automotive-grade designs requiring higher reliability margins.

For Improved Temperature Stability (Lower Temperature Coefficient):

RN73C2A46R4BTDF (TE Connectivity) features ±10ppm/°C temperature coefficient (vs. ±25ppm/°C), providing superior temperature stability. This part maintains 0.1W power rating and ±0.1% tolerance, making it suitable for precision analog circuits requiring minimal temperature drift.

All recommended substitutes are ROHS3 compliant, MSL 1 (Unlimited), and maintain -55°C ~ 155°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD46R4F25 directly replace RN732ATTD46R4F25?

A: Yes. Both parts share identical resistance (46.4 Ohms), tolerance (±1%), package (0805), composition (thin film), and operating temperature range (-55°C ~ 155°C). RN73R2ATTD46R4F25 provides higher power rating (0.125W vs. 0.1W), which is a beneficial upgrade. The primary difference is active product status versus obsolete status.

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

A: Direct substitutes maintain the original ±1% tolerance specification. Upgrade substitutes offer improved tolerance (±0.1%, ±0.25%, ±0.5%), higher power ratings, or enhanced features such as Automotive AEC-Q200 certification. Upgrades are backward-compatible and provide additional design margin.

Q: Are all substitute parts available in 0805 package?

A: Yes. All listed substitute parts are manufactured in 0805 (2012 Metric) package format with identical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and compatible mounting characteristics.

Q: Which substitute is recommended for automotive applications?

A: Parts with Automotive AEC-Q200 certification are recommended: RN73R2ATTD46R4F25, AT0805BRD0746R4L, AT0805CRD0746R4L, AT0805DRD0746R4L, RNCF0805BKE46R4, and RNCF0805BTE46R4. These parts meet automotive reliability and qualification standards.

Q: What is the significance of tolerance improvement from ±1% to ±0.1%?

A: Tolerance improvement reduces component value variation. ±0.1% tolerance provides tighter resistance accuracy, beneficial for precision analog circuits, measurement instrumentation, and applications requiring predictable circuit behavior across production batches.

Q: Can I use a 0.25W rated part in place of a 0.1W rated part?

A: Yes. Higher power rating is a beneficial upgrade. A 0.25W part can safely replace a 0.1W part in the same circuit, providing additional thermal margin and reliability. The component will operate at lower stress levels.

Q: Are all substitute parts 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.

Q: What is the difference between YAGEO AT series parts (AT0805BRD0746R4L, AT0805CRD0746R4L, AT0805DRD0746R4L)?

A: These parts differ in tolerance specification: AT0805BRD0746R4L (±0.1%), AT0805CRD0746R4L (±0.25%), AT0805DRD0746R4L (±0.5%). All maintain identical 46.4 Ohms resistance, 0.125W power rating, and Automotive AEC-Q200 certification. Selection depends on required tolerance accuracy for the application.

Q: Why does RN73C2A46R4BTDF have ±10ppm/°C temperature coefficient instead of ±25ppm/°C?

A: RN73C2A46R4BTDF is manufactured with enhanced temperature stability specifications. The ±10ppm/°C coefficient indicates lower resistance variation across the -55°C ~ 155°C operating range, making it suitable for precision applications requiring minimal temperature drift.

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