RG2012P-1780-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012P-1780-C-T5 is a 178 Ohm ±0.25% thin film chip resistor manufactured by Susumu in 0805 (2012 Metric) package format. This component is rated for 0.125W (1/8W) power dissipation and features anti-sulfur coating with AEC-Q200 automotive qualification. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility while offering enhanced performance characteristics or improved availability.

Key Parameters

Parameter	Value
Resistance	178 Ohms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C to 155°C
Features	Anti-Sulfur, Automotive AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012P-1780-C-T5 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Resistance value: 178 Ohms (exact match required)
Tolerance: ±0.25% or tighter (lower tolerance values are acceptable upgrades)
Power rating: 0.125W minimum (higher power ratings are acceptable)
Temperature coefficient: ±25ppm/°C or better (lower values are acceptable upgrades)
Operating temperature range: -55°C to 155°C (minimum requirement)

Mechanical Compatibility Requirements:

Package format: 0805 (2012 Metric) (exact match required)
Composition: Thin film (maintains performance characteristics)
Number of terminations: 2 (exact match required)

Compliance Requirements:

RoHS3 compliance (mandatory for environmental standards)
AEC-Q200 rating (required for automotive applications)
Moisture sensitivity: MSL 1 (unlimited shelf life)

Substitute parts are categorized as upgrades when they maintain all mechanical and electrical compatibility parameters while offering improved tolerance, lower temperature coefficient, or active product status. Direct substitutes from alternative manufacturers are included when they match all critical parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Product Status	AEC-Q200
RG2012P-1780-C-T5	Susumu	178 Ω	±0.25%	0.125	±25	0805	Obsolete	Yes
RG2012N-1780-B-T5	Susumu	178 Ω	±0.1%	0.125	±10	0805	Active	Yes
RG2012N-1780-W-T1	Susumu	178 Ω	±0.05%	0.125	±10	0805	Active	Yes
RG2012P-1780-B-T5	Susumu	178 Ω	±0.1%	0.125	±25	0805	Active	Yes
RG2012P-1780-W-T5	Susumu	178 Ω	±0.05%	0.125	±25	0805	Active	Yes
RG2012V-1780-B-T5	Susumu	178 Ω	±0.1%	0.125	±5	0805	Active	Yes
RG2012V-1780-P-T1	Susumu	178 Ω	±0.02%	0.125	±5	0805	Active	Yes
RG2012V-1780-W-T1	Susumu	178 Ω	±0.05%	0.125	±5	0805	Active	Yes
RG2012V-1780-W-T5	Susumu	178 Ω	±0.05%	0.125	±5	0805	Active	Yes
4-2176091-8	TE Connectivity	178 Ω	±0.1%	0.25	±25	0805	Active	No
RT0805CRD07178RL	YAGEO	178 Ω	±0.25%	0.125	±25	0805	Active	No

Engineering Selection Recommendations

Primary Upgrade Path (Susumu RG Series):

For applications requiring direct replacement with enhanced specifications, the Susumu RG2012 series offers multiple active alternatives. The RG2012P-1780-B-T5 provides improved tolerance (±0.1%) while maintaining the same temperature coefficient (±25ppm/°C) as the original part. The RG2012P-1780-W-T5 further improves tolerance to ±0.05% with identical thermal characteristics.

For applications with stricter tolerance requirements, the RG2012V series delivers superior performance. The RG2012V-1780-B-T5 combines ±0.1% tolerance with a reduced temperature coefficient of ±5ppm/°C. The RG2012V-1780-P-T1 represents the highest precision option with ±0.02% tolerance and ±5ppm/°C temperature coefficient.

All Susumu RG2012 alternatives maintain AEC-Q200 automotive qualification, anti-sulfur coating, and MSL 1 moisture sensitivity rating, ensuring compatibility with automotive and high-reliability applications.

Alternative Manufacturer Options:

The YAGEO RT0805CRD07178RL provides an active equivalent with matching electrical specifications (178 Ω ±0.25%, 0.125W, ±25ppm/°C) in 0805 package. This part does not carry AEC-Q200 rating and is suitable for non-automotive applications.

The TE Connectivity 4-2176091-8 offers increased power rating (0.25W) with improved tolerance (±0.1%) but does not carry AEC-Q200 certification. This part is applicable only to applications where automotive qualification is not required.

Selection Criteria:

Automotive/AEC-Q200 Required: Select from Susumu RG2012 series (RG2012P or RG2012V variants)
Standard Industrial Applications: YAGEO RT0805CRD07178RL or TE Connectivity 4-2176091-8
Precision-Critical Circuits: RG2012V-1780-P-T1 (±0.02% tolerance, ±5ppm/°C)
Cost-Optimized Upgrade: RG2012P-1780-B-T5 (active status, improved tolerance)

Frequently Asked Questions (FAQ)

Q: Can the RG2012P-1780-C-T5 be directly replaced with any of the listed substitutes?

A: Yes, all Susumu RG2012 series parts listed are direct mechanical and electrical replacements. The YAGEO RT0805CRD07178RL is also mechanically and electrically compatible but lacks AEC-Q200 certification. The TE Connectivity 4-2176091-8 is mechanically compatible but has higher power rating (0.25W vs. 0.125W) and no AEC-Q200 rating.

Q: What is the difference between RG2012P and RG2012V series?

A: The RG2012P series has a temperature coefficient of ±25ppm/°C, while the RG2012V series has ±5ppm/°C. The RG2012V series provides superior thermal stability for temperature-sensitive applications. Both series maintain identical resistance values, package dimensions, and AEC-Q200 compliance.

Q: Are all substitute parts RoHS3 compliant?

A: All Susumu RG2012 series parts and the YAGEO RT0805CRD07178RL are RoHS3 compliant. The TE Connectivity 4-2176091-8 is also RoHS3 compliant. Compliance status is verified in the provided specifications.

Q: Does tolerance improvement affect circuit performance?

A: Tighter tolerance (lower percentage values) reduces resistance value variation across the production batch. Applications with precision requirements benefit from lower tolerance specifications. The original ±0.25% tolerance is suitable for general-purpose circuits; ±0.1% or better is recommended for precision analog circuits and reference networks.

Q: Can the TE Connectivity 4-2176091-8 be used in automotive applications?

A: The TE Connectivity 4-2176091-8 lacks AEC-Q200 automotive qualification. It is not recommended for automotive applications requiring AEC-Q200 compliance. For automotive use, select from the Susumu RG2012 series.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, ensuring no special storage or handling procedures are necessary.

Q: Are the 0805 package dimensions identical across all substitutes?

A: All parts use 0805 (2012 Metric) package with identical length (0.079" / 2.00mm) and width (0.049" / 1.25mm). Height variations exist: RG2012P/N series maximum 0.020" (0.50mm), TE Connectivity 4-2176091-8 maximum 0.026" (0.65mm), and YAGEO RT0805CRD07178RL maximum 0.024" (0.60mm). These minor height differences do not affect PCB layout compatibility for standard applications.

Q: Which substitute offers the best long-term availability?

A: All Susumu RG2012 series parts are classified as active products with current inventory levels ranging from 789 to 993 pieces. The YAGEO RT0805CRD07178RL and TE Connectivity 4-2176091-8 are also active products with 767 and 1215 pieces in stock respectively. Active status indicates ongoing manufacturing and supply availability.

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