RG2012P-1870-W-T1 Equivalent & Substitute Parts

Part Overview

The RG2012P-1870-W-T1 is a 187 Ohm ±0.05% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. This component is designed for automotive applications and carries AEC-Q200 qualification with anti-sulfur coating. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and design requirements. Active alternatives with identical or enhanced electrical characteristics are available from the same manufacturer and qualified cross-reference sources.

Key Parameters

Parameter	Value
Resistance	187 Ohms
Tolerance	±0.05%
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
Automotive Rating	AEC-Q200
Features	Anti-Sulfur
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012P-1870-W-T1 is determined by the following critical parameters:

Electrical Equivalence Requirements:

Resistance value: 187 Ohms (exact match required)
Tolerance: ±0.05% or tighter (lower tolerance values are acceptable upgrades)
Power rating: 0.125W minimum (equal or higher ratings are acceptable)
Operating temperature range: -55°C to 155°C minimum (equal or wider ranges are acceptable)

Mechanical Compatibility Requirements:

Package type: 0805 (2012 Metric) (exact match required for PCB layout compatibility)
Number of terminations: 2 (exact match required)
Physical dimensions: 0.079" L x 0.049" W (exact match required)

Compliance & Certification Requirements:

AEC-Q200 automotive qualification (required for automotive applications)
RoHS3 compliance (required for regulatory conformance)
Moisture Sensitivity Level 1 (required for storage and handling compatibility)

Substitute parts are grouped into three categories: direct equivalents (identical specifications with different packaging), upgrades (improved electrical performance), and similar alternatives (different manufacturer with compatible specifications).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Status	Inventory
RG2012P-1870-W-T1	Susumu	187 Ω	±0.05%	0.125	±25	0805	Obsolete	949 Pcs
RG2012P-1870-W-T5	Susumu	187 Ω	±0.05%	0.125	±25	0805	Active	749 Pcs
RG2012N-1870-W-T1	Susumu	187 Ω	±0.05%	0.125	±10	0805	Active	1039 Pcs
RG2012V-1870-P-T1	Susumu	187 Ω	±0.02%	0.125	±5	0805	Active	969 Pcs
RG2012V-1870-W-T1	Susumu	187 Ω	±0.05%	0.125	±5	0805	Active	702 Pcs
RG2012V-1870-W-T5	Susumu	187 Ω	±0.05%	0.125	±5	0805	Active	767 Pcs
ERA-6AEB1870V	Panasonic Electronic Components	187 Ω	±0.1%	0.125	±25	0805	Active	20686 Pcs

Engineering Selection Recommendations

Direct Equivalent (Packaging Variant): RG2012P-1870-W-T1 can be directly replaced by RG2012P-1870-W-T5. Both parts share identical electrical specifications (187 Ω, ±0.05%, 0.125W, ±25ppm/°C) and mechanical compatibility. The primary difference is packaging format (T1 versus T5 tape reel configuration). This substitution is suitable for applications where the original part is no longer available but identical performance is required.

Upgraded Alternatives (Enhanced Performance): RG2012N-1870-W-T1, RG2012V-1870-W-T1, and RG2012V-1870-W-T5 provide improved temperature coefficient performance (±10ppm/°C and ±5ppm/°C respectively) while maintaining the required ±0.05% tolerance and all other critical specifications. These upgrades are suitable for applications requiring superior temperature stability. RG2012V-1870-P-T1 offers the highest performance with ±0.02% tolerance and ±5ppm/°C temperature coefficient.

Cross-Manufacturer Alternative: ERA-6AEB1870V from Panasonic Electronic Components is electrically compatible with a tolerance of ±0.1% (wider than the original ±0.05%). This part maintains AEC-Q200 qualification, identical package dimensions, and operating temperature range. The higher tolerance may be acceptable for applications with less stringent accuracy requirements. Significantly higher inventory availability (20686 Pcs) makes this option suitable for high-volume production scenarios.

All substitute parts maintain ROHS3 compliance, AEC-Q200 automotive qualification, and Moisture Sensitivity Level 1 rating required for the original application.

Frequently Asked Questions (FAQ)

Q: Can RG2012P-1870-W-T5 be used as a direct replacement for RG2012P-1870-W-T1?

A: Yes. Both parts have identical electrical specifications (187 Ω, ±0.05%, 0.125W, ±25ppm/°C) and mechanical compatibility (0805 package, 2.00mm x 1.25mm dimensions). The difference between T1 and T5 designations refers to tape reel packaging configuration. Electrical and thermal performance are equivalent.

Q: What is the difference between the RG2012N and RG2012V series?

A: The RG2012N series (represented by RG2012N-1870-W-T1) provides a temperature coefficient of ±10ppm/°C. The RG2012V series (RG2012V-1870-W-T1 and RG2012V-1870-W-T5) provides a tighter temperature coefficient of ±5ppm/°C. Both maintain the same 187 Ω resistance and ±0.05% tolerance. The RG2012V series is suitable for applications requiring superior temperature stability.

Q: Is the Panasonic ERA-6AEB1870V suitable for automotive applications?

A: Yes. The ERA-6AEB1870V carries AEC-Q200 automotive qualification identical to the original RG2012P-1870-W-T1. However, the tolerance specification is ±0.1% compared to the original ±0.05%. This wider tolerance may be acceptable depending on circuit requirements. All other critical parameters (resistance value, power rating, operating temperature range, package type) are compatible.

Q: What does the ±0.02% tolerance in RG2012V-1870-P-T1 mean for circuit performance?

A: The ±0.02% tolerance represents the tightest tolerance available among the substitute options. This specification indicates that the actual resistance value will be within ±0.02% of the nominal 187 Ω value. This enhanced accuracy is suitable for precision analog circuits, reference networks, and applications where component tolerance stack-up is critical.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the 0805 (2012 Metric) package with identical physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and two terminations. PCB footprints, solder pad spacing, and assembly processes remain unchanged across all listed substitutes.

Q: What is the significance of the anti-sulfur coating on the original part?

A: The anti-sulfur coating on the RG2012P-1870-W-T1 provides protection against sulfur-containing environmental contaminants that can degrade resistor performance. The Susumu RG series substitutes (RG2012N and RG2012V variants) maintain this anti-sulfur feature. The Panasonic ERA-6AEB1870V does not specify anti-sulfur coating; this should be considered for applications in high-sulfur environments.

Q: Can I use RG2012V-1870-P-T1 in place of RG2012P-1870-W-T1?

A: Yes. The RG2012V-1870-P-T1 is electrically compatible with superior specifications: ±0.02% tolerance (tighter than ±0.05%), ±5ppm/°C temperature coefficient (tighter than ±25ppm/°C), and identical 187 Ω resistance and 0.125W power rating. The mechanical compatibility (0805 package) and automotive qualification (AEC-Q200) are maintained. This substitution is suitable for applications where improved performance is beneficial or required.

Q: What is Moisture Sensitivity Level 1 and why is it important?

A: Moisture Sensitivity Level (MSL) 1 indicates unlimited shelf life without special moisture control measures. All listed substitute parts maintain MSL 1 rating, ensuring compatibility with standard storage, handling, and assembly processes. No special dry-pack requirements or baking procedures are necessary before soldering.

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