RN732ATTD3010B10 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3010B10 is a 301 Ohm ±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 ±10ppm/°C and operates across the -55°C to 155°C temperature range. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Resistance	301 Ohms
Tolerance	±0.1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±10ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3010B10 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Resistance value: 301 Ohms (exact match required)
Tolerance: ±0.1% (minimum acceptable tolerance)
Package: 0805 (2012 Metric) (physical and footprint compatibility)
Composition: Thin Film (electrical performance characteristics)
Temperature Coefficient: ±10ppm/°C (thermal stability requirement)
Operating Temperature Range: -55°C ~ 155°C (environmental compatibility)
Moisture Sensitivity Level: 1 (Unlimited) (handling and storage compatibility)

Acceptable Variations:

Power rating: 0.1W (1/10W) or higher (0.125W / 1/8W acceptable as upgrade)
Tolerance: ±0.05% acceptable (tighter tolerance than specified)
Packaging format: Tape & Reel (TR), Strip, or bulk (functional equivalence)
Manufacturer: Different manufacturers acceptable if all electrical parameters match
Additional features: Automotive AEC-Q200 certification, Anti-Sulfur coating acceptable as enhancements

Non-Substitutable Variations:

Resistance values other than 301 Ohms
Tolerance wider than ±0.1%
Package formats other than 0805 (2012 Metric)
Operating temperature range narrower than -55°C ~ 155°C
Moisture Sensitivity Level higher than 1

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Op Temp Range (°C)	Package	Status	Packaging Format
RN732ATTD3010B10	KOA Speer Electronics	301 Ω	±0.1%	0.1	±10	-55 ~ 155	0805	Obsolete	Bulk
RN73R2ATTD3010B10	KOA Speer Electronics	301 Ω	±0.1%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel
1676298-5	TE Connectivity Passive Product	301 Ω	±0.1%	0.1	±10	-55 ~ 155	0805	Active	Bulk
RN73C2A301RBTD	TE Connectivity Passive Product	301 Ω	±0.1%	0.1	±10	-55 ~ 155	0805	Active	Tape & Reel
RN73C2A301RBTDF	TE Connectivity Passive Product	301 Ω	±0.1%	0.1	±10	-55 ~ 155	0805	Active	Tape & Reel
RN73C2A301RBTG	TE Connectivity Passive Product	301 Ω	±0.1%	0.1	±10	-55 ~ 155	0805	Active	Strip
RNCF0805BKT301R	Stackpole Electronics Inc	301 Ω	±0.1%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel
RT0805BRB07301RL	YAGEO	301 Ω	±0.1%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel
RG2012N-3010-B-T5	Susumu	301 Ω	±0.1%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel
RG2012N-3010-W-T1	Susumu	301 Ω	±0.05%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel
RG2012N-3010-W-T5	Susumu	301 Ω	±0.05%	0.125	±10	-55 ~ 155	0805	Active	Tape & Reel

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications):

The following parts provide direct electrical equivalence to RN732ATTD3010B10 with identical 0.1W power rating and ±0.1% tolerance:

1676298-5 (TE Connectivity Passive Product): Active status, bulk packaging, identical specifications
RN73C2A301RBTD (TE Connectivity Passive Product): Active status, Tape & Reel packaging, ROHS3 compliant
RN73C2A301RBTDF (TE Connectivity Passive Product): Active status, Tape & Reel packaging, ROHS3 compliant, REACH Unaffected
RN73C2A301RBTG (TE Connectivity Passive Product): Active status, Strip packaging, ROHS3 compliant

Upgraded Substitutes (Higher Power Rating):

The following parts provide enhanced specifications with 0.125W (1/8W) power rating while maintaining ±0.1% tolerance and all other critical parameters:

RN73R2ATTD3010B10 (KOA Speer Electronics): Active status, Automotive AEC-Q200 certified, Tape & Reel packaging
RNCF0805BKT301R (Stackpole Electronics Inc): Active status, Automotive AEC-Q200 certified, ROHS3 compliant
RT0805BRB07301RL (YAGEO): Active status, ROHS3 compliant, Tape & Reel packaging

Premium Upgraded Substitutes (Tighter Tolerance & Enhanced Features):

The following parts provide ±0.05% tolerance (tighter than specified), 0.125W power rating, Anti-Sulfur coating, and Automotive AEC-Q200 certification:

RG2012N-3010-B-T5 (Susumu): Active status, ROHS3 compliant, REACH Unaffected
RG2012N-3010-W-T1 (Susumu): Active status, ROHS3 compliant, REACH Unaffected
RG2012N-3010-W-T5 (Susumu): Active status, ROHS3 compliant, REACH Unaffected

Selection Criteria by Application:

For applications requiring exact power rating match (0.1W): Select from direct equivalents (1676298-5, RN73C2A301RBTD, RN73C2A301RBTDF, RN73C2A301RBTG).

For applications permitting higher power dissipation capability: Select from upgraded substitutes with 0.125W rating.

For automotive applications requiring AEC-Q200 certification: Select RN73R2ATTD3010B10, RNCF0805BKT301R, or Susumu RG series parts.

For applications requiring superior tolerance and environmental protection: Select Susumu RG2012N series with ±0.05% tolerance and Anti-Sulfur coating.

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing supply chain and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can RN732ATTD3010B10 be replaced with a 0.125W (1/8W) rated resistor?

A: Yes. The 0.125W power rating is higher than the original 0.1W specification. Higher power-rated components can safely substitute for lower power-rated components in the same package when all other electrical parameters (resistance, tolerance, temperature coefficient, operating temperature range) are identical. This provides additional thermal margin without affecting circuit performance.

Q: What is the difference between the TE Connectivity parts (RN73C2A301RBTD, RN73C2A301RBTDF, RN73C2A301RBTG)?

A: These three parts are electrically identical with the same 301 Ohm resistance, ±0.1% tolerance, and 0.1W power rating. The differences are in packaging format only: RBTD and RBTDF are supplied in Tape & Reel format (suitable for automated assembly), while RBTG is supplied in Strip format. RBTDF carries REACH Unaffected status, while RBTD and RBTG have Vendor Undefined REACH status. Select based on your procurement and assembly requirements.

Q: Are Susumu RG2012N parts compatible with the original RN732ATTD3010B10?

A: Yes, with enhancements. The Susumu RG2012N series maintains the 301 Ohm resistance, ±10ppm/°C temperature coefficient, and -55°C to 155°C operating range. The RG2012N-3010-B-T5 matches the original ±0.1% tolerance, while RG2012N-3010-W-T1 and RG2012N-3010-W-T5 provide tighter ±0.05% tolerance. All three feature Anti-Sulfur coating and Automotive AEC-Q200 certification, making them suitable for applications requiring enhanced environmental protection and automotive-grade reliability.

Q: What does "Tape & Reel" packaging mean compared to bulk or strip?

A: Tape & Reel (TR) packaging supplies components wound on continuous tape with sprocket holes, designed for automated pick-and-place assembly equipment. Strip packaging supplies components in a continuous strip without sprocket holes. Bulk packaging supplies loose components. All three formats contain identical components; the difference is in delivery and handling format. Select Tape & Reel for high-volume automated assembly, Strip for semi-automated processes, and bulk for manual assembly or low-volume applications.

Q: Can I use RN73R2ATTD3010B10 as a direct replacement for RN732ATTD3010B10?

A: Yes. RN73R2ATTD3010B10 is a direct functional substitute with identical 301 Ohm resistance and ±0.1% tolerance. The primary differences are: (1) higher 0.125W power rating provides additional thermal capability, (2) Automotive AEC-Q200 certification for enhanced reliability, and (3) active product status with current availability. The higher power rating does not negatively impact circuit performance and provides design margin.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European Union regulations restricting the use of specific hazardous materials including lead, cadmium, mercury, hexavalent chromium, and certain brominated flame retardants. All recommended substitutes carry ROHS3 compliance, ensuring compatibility with modern supply chain requirements and environmental regulations.

Q: Why is the original RN732ATTD3010B10 marked as obsolete?

A: Product obsolescence indicates the manufacturer has discontinued production. The recommended active substitutes provide equivalent or enhanced electrical performance and maintain full compatibility with the original design. Transitioning to active parts ensures long-term supply availability and reduces risk of future component shortages.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL (Moisture Sensitivity Level) 1 indicates the component has unlimited shelf life and requires no special moisture-control handling during storage or assembly. This is the least restrictive moisture sensitivity rating, meaning the component can be stored in standard warehouse conditions without desiccant packaging or controlled humidity environments. All recommended substitutes carry MSL 1 rating, ensuring compatibility with standard supply chain practices.

Q: Can I mix different substitute parts in the same circuit board assembly?

A: Yes. All recommended substitutes meet the same electrical specifications (301 Ohm, ±0.1% tolerance minimum, ±10ppm/°C temperature coefficient, -55°C to 155°C operating range, 0805 package). Mixing different manufacturers or packaging formats in the same assembly is electrically acceptable. However, for manufacturing efficiency and traceability, it is common practice to standardize on a single part number per design revision.

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