RN732ATTD4120D100 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4120D100 is a 412 Ohms ±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 currently listed as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility while offering improved availability and performance characteristics.

Key Parameters

Parameter	Value
Resistance	412 Ohms
Tolerance	±0.5%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4120D100 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

Resistance value: 412 Ohms (exact match required)
Tolerance: ±0.5% (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Secondary Compatibility Criteria:

Operating Temperature Range: -55°C minimum and 155°C maximum (substitute must meet or exceed)
Power Rating: Substitute may equal or exceed the 0.1W rating
Temperature Coefficient: Substitute may equal or improve upon ±100ppm/°C

Substitute parts are grouped into two categories based on power rating:

Category 1 - Direct Power Rating Match (0.1W / 1/10W): RR1220P-4120-D-M (Susumu) maintains identical power rating with improved temperature coefficient (±25ppm/°C) and active product status.

Category 2 - Upgraded Power Rating (0.125W / 1/8W and 0.25W / 1/4W): Parts with higher power ratings provide enhanced thermal performance while maintaining all other critical parameters. These include KOA Speer RN73R2ATTD4120D100, YAGEO AT0805DRD07412RL, AT0805DRE07412RL, and Susumu RG series variants.

Category 3 - Maximum Power Rating (0.25W / 1/4W): Stackpole Electronics RNCF series (RNCF0805DKE412R, RNCF0805DTC412R, RNCF0805DTE412R) offer the highest power rating with automotive AEC-Q200 certification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	AEC-Q200
RN732ATTD4120D100	KOA Speer	412 Ω	±0.5%	0.1	±100	-55 ~ 155	Obsolete	No
RN73R2ATTD4120D100	KOA Speer	412 Ω	±0.5%	0.125	±100	-55 ~ 155	Active	Yes
AT0805DRD07412RL	YAGEO	412 Ω	±0.5%	0.125	±25	-55 ~ 155	Active	Yes
AT0805DRE07412RL	YAGEO	412 Ω	±0.5%	0.125	±50	-55 ~ 155	Active	Yes
RG2012N-4120-D-T5	Susumu	412 Ω	±0.5%	0.125	±10	-55 ~ 155	Active	Yes
RG2012P-4120-D-T5	Susumu	412 Ω	±0.5%	0.125	±25	-55 ~ 155	Active	Yes
RG2012V-4120-D-T5	Susumu	412 Ω	±0.5%	0.125	±5	-55 ~ 155	Active	Yes
RNCF0805DKE412R	Stackpole	412 Ω	±0.5%	0.25	±25	-55 ~ 155	Active	Yes
RNCF0805DTC412R	Stackpole	412 Ω	±0.5%	0.25	±50	-55 ~ 155	Active	Yes
RNCF0805DTE412R	Stackpole	412 Ω	±0.5%	0.25	±25	-55 ~ 155	Active	Yes
RR1220P-4120-D-M	Susumu	412 Ω	±0.5%	0.1	±25	-55 ~ 125	Active	No

Engineering Selection Recommendations

For Direct Replacement (Identical Power Rating):

RR1220P-4120-D-M from Susumu provides the closest functional equivalent to the RN732ATTD4120D100. Both components share the 0.1W power rating and 412 Ohms ±0.5% specification. The Susumu part offers improved temperature coefficient performance (±25ppm/°C versus ±100ppm/°C) and maintains active product status with ROHS3 compliance. Operating temperature range is -55°C to 125°C, which covers the lower end of the original specification but does not extend to 155°C.

For Upgraded Performance (Higher Power Rating with AEC-Q200):

When thermal margin or automotive qualification is required, the following active parts provide enhanced capabilities:

RN73R2ATTD4120D100 (KOA Speer): Maintains manufacturer continuity with 0.125W rating and AEC-Q200 certification. Temperature coefficient remains at ±100ppm/°C.
RG2012V-4120-D-T5 (Susumu): Offers superior temperature coefficient performance (±5ppm/°C) with 0.125W rating and AEC-Q200 certification. Extends full operating range to 155°C.
RNCF0805DTE412R (Stackpole Electronics): Provides maximum power rating (0.25W) with AEC-Q200 certification and ±25ppm/°C temperature coefficient. Extends full operating range to 155°C.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), and 0805 (2012 Metric) package compatibility.

Frequently Asked Questions (FAQ)

Q: Can RR1220P-4120-D-M be used as a direct replacement for RN732ATTD4120D100?

A: RR1220P-4120-D-M is electrically compatible with identical resistance (412 Ohms ±0.5%) and power rating (0.1W). Both components use 0805 package format and thin film composition. However, the operating temperature range differs: RR1220P-4120-D-M operates to 125°C maximum, while the original part extends to 155°C. Verify application temperature requirements before substitution.

Q: What is the advantage of upgrading to a higher power rating substitute?

A: Higher power rating components (0.125W or 0.25W) provide increased thermal headroom in the application, reducing junction temperature stress and potentially extending component life. They maintain identical resistance and tolerance specifications while offering improved reliability margins. Physical dimensions remain unchanged in the 0805 package format.

Q: Are all substitute parts AEC-Q200 qualified?

A: No. RR1220P-4120-D-M does not carry AEC-Q200 certification. All other listed substitutes (KOA Speer RN73R2ATTD4120D100, YAGEO AT series, Susumu RG series, and Stackpole RNCF series) are AEC-Q200 qualified. Select AEC-Q200 certified parts for automotive applications.

Q: Which substitute offers the best temperature coefficient performance?

A: RG2012V-4120-D-T5 from Susumu provides the lowest temperature coefficient at ±5ppm/°C, compared to the original part's ±100ppm/°C. This represents a 20-fold improvement in temperature stability. RG2012N-4120-D-T5 offers ±10ppm/°C as an alternative from the same manufacturer.

Q: Do all substitutes maintain the same physical dimensions?

A: All listed substitutes use the 0805 (2012 Metric) package with identical length (0.079" / 2.00mm) and width (0.049" / 1.25mm). Height varies slightly: original part and KOA Speer RN73R2ATTD4120D100 measure 0.024" (0.60mm), while Susumu RG series and Stackpole RNCF series measure 0.020" to 0.026" (0.50mm to 0.65mm). Verify PCB layout clearance for height-sensitive applications.

Q: Is moisture resistance maintained across all substitutes?

A: The original RN732ATTD4120D100 explicitly specifies moisture-resistant construction. Substitute parts from KOA Speer (RN73R2ATTD4120D100) and YAGEO (AT series) maintain moisture-resistant features. Susumu RG series and Stackpole RNCF series do not explicitly list moisture resistance in provided specifications. For moisture-critical applications, select KOA Speer or YAGEO alternatives.

Q: Can RNCF0805DTE412R be used in place of RN732ATTD4120D100?

A: RNCF0805DTE412R is electrically and mechanically compatible with identical resistance (412 Ohms ±0.5%), tolerance, package format, and operating temperature range (-55°C to 155°C). The primary difference is higher power rating (0.25W versus 0.1W), which provides additional thermal margin. AEC-Q200 certification is included. This substitution is valid for applications where the higher power rating does not create thermal or space constraints.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message