RMCS0805JT100R Equivalent & Substitute Parts

Part Overview

The RMCS0805JT100R is a 100 Ohm ±5% thick film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. Manufactured by Stackpole Electronics Inc, this component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). The part operates across -55°C to 155°C temperature range with ±100ppm/°C temperature coefficient.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (package type, dimensions, termination count) while maintaining functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Resistance	100 Ohms
Tolerance	±5%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Operating Temperature	-55°C ~ 155°C
Temperature Coefficient	±100ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Matching Parameters:

Resistance value: 100 Ohms
Package / Case: 0805 (2012 Metric)
Number of Terminations: 2
Operating Temperature Range: -55°C ~ 155°C
Composition: Thick Film
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Tolerance: ±5% (main part) to ±1% (substitute parts) — tighter tolerance is acceptable as a direct upgrade
Power Rating: 0.125W (main part) to 0.25W, 0.333W, or 0.5W (substitute parts) — higher power rating is acceptable for thermal margin
Features: Anti-Sulfur, Automotive AEC-Q200, Pulse Withstanding — additional features do not prevent substitution
Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align

Substitute parts are grouped into two categories: Tolerance Upgrades (±1% tolerance with same or higher power rating) and Power Rating Upgrades (higher power dissipation capability with improved tolerance).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Features	AEC-Q200	Inventory
RMCS0805JT100R	Stackpole Electronics Inc	100 Ohms	±5%	0.125W	0805	Anti-Sulfur	No	949 Pcs
RMCS0805FT100R	Stackpole Electronics Inc	100 Ohms	±1%	0.125W	0805	Anti-Sulfur	No	1005 Pcs
RMCF0805FT100R	Stackpole Electronics Inc	100 Ohms	±1%	0.125W	0805	Automotive AEC-Q200	Yes	5204 Pcs
RMCP0805FT100R	Stackpole Electronics Inc	100 Ohms	±1%	0.333W	0805	Automotive AEC-Q200	Yes	780 Pcs
AF0805FR-07100RL	YAGEO	100 Ohms	±1%	0.125W	0805	Anti-Sulfur, Automotive AEC-Q200	Yes	18020 Pcs
CRS0805AFX-1000ELF	Bourns Inc.	100 Ohms	±1%	0.25W	0805	Anti-Sulfur, Automotive AEC-Q200, Pulse Withstanding	Yes	6674 Pcs
ERJ-S06F1000V	Panasonic Electronic Components	100 Ohms	±1%	0.125W	0805	Anti-Sulfur, Automotive AEC-Q200	Yes	6047 Pcs
ERJ-UP6F1000V	Panasonic Electronic Components	100 Ohms	±1%	0.5W	0805	Anti-Sulfur, Automotive AEC-Q200, Pulse Withstanding	Yes	5706 Pcs
AC0805FR-07100RL	YAGEO	100 Ohms	±1%	0.125W	0805	Automotive AEC-Q200, Moisture Resistant	Yes	4289 Pcs
AC0805JR-07100RL	YAGEO	100 Ohms	±5%	0.125W	0805	Automotive AEC-Q200, Moisture Resistant	Yes	3026 Pcs
CRCW0805100RFKEA	Vishay Dale	100 Ohms	±1%	0.125W	0805	Automotive AEC-Q200	Yes	3763 Pcs

Engineering Selection Recommendations

Direct Substitutes (Same Tolerance ±5%): AC0805JR-07100RL is the only substitute maintaining ±5% tolerance. This part adds Automotive AEC-Q200 certification and moisture resistance features while preserving electrical and mechanical compatibility. Selection is appropriate for applications requiring automotive-grade reliability without tolerance tightening.

Tolerance Upgrade Substitutes (±1%): RMCS0805FT100R, RMCF0805FT100R, AF0805FR-07100RL, ERJ-S06F1000V, AC0805FR-07100RL, and CRCW0805100RFKEA all provide ±1% tolerance upgrade at 0.125W power rating. These parts are direct functional upgrades suitable for precision circuit applications. RMCF0805FT100R, AF0805FR-07100RL, ERJ-S06F1000V, AC0805FR-07100RL, and CRCW0805100RFKEA include Automotive AEC-Q200 certification for enhanced reliability in demanding environments.

Power Rating Upgrade Substitutes: CRS0805AFX-1000ELF (0.25W), RMCP0805FT100R (0.333W), and ERJ-UP6F1000V (0.5W) provide increased power dissipation capability with ±1% tolerance and Automotive AEC-Q200 certification. These selections are appropriate when thermal margin or pulse withstanding capability is required. CRS0805AFX-1000ELF and ERJ-UP6F1000V include pulse withstanding features for transient protection.

All substitute parts maintain identical package dimensions (0805 / 2012 Metric), operating temperature range (-55°C ~ 155°C), and RoHS3 compliance. Selection should be based on application requirements for tolerance precision, power dissipation margin, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: Can RMCS0805FT100R replace RMCS0805JT100R directly? A: Yes. RMCS0805FT100R is a direct substitute with identical electrical and mechanical specifications except for tighter ±1% tolerance, which is a functional upgrade. Both parts share the same manufacturer (Stackpole Electronics Inc), package (0805), power rating (0.125W), and operating temperature range (-55°C ~ 155°C).

Q: What is the difference between tolerance ±5% and ±1%? A: Tolerance defines the allowable deviation from the nominal 100 Ohm resistance value. ±5% allows deviation between 95–105 Ohms, while ±1% restricts deviation to 99–101 Ohms. Tighter tolerance (±1%) is suitable for precision applications requiring accurate resistance values. ±1% parts are acceptable substitutes for ±5% applications without functional impact.

Q: Are automotive-grade parts (AEC-Q200) compatible with non-automotive applications? A: Yes. Automotive AEC-Q200 certified parts meet enhanced reliability and qualification standards and are fully compatible with non-automotive applications. These parts provide additional margin for demanding environments but do not restrict use in standard applications.

Q: Can I use a higher power rating resistor (0.25W, 0.333W, 0.5W) in place of 0.125W? A: Yes. Higher power rating resistors are direct substitutes for lower power rating applications. The 0805 package dimensions remain identical. Higher power rating provides additional thermal margin and is suitable for applications with potential power dissipation variations or thermal stress conditions.

Q: Does package dimension change between substitute parts? A: No. All substitute parts maintain the 0805 (2012 Metric) package with identical dimensions: 0.079" L × 0.049" W (2.00mm × 1.25mm). Height variation is minimal (0.020"–0.028" seated height maximum) and does not affect PCB layout or assembly compatibility.

Q: What is the significance of anti-sulfur and moisture-resistant features? A: Anti-sulfur coating protects against sulfur contamination in industrial environments. Moisture-resistant features enhance reliability in high-humidity conditions. These features are optional enhancements that do not prevent substitution but provide additional environmental protection when specified.

Q: Can AC0805JR-07100RL (±5% tolerance) replace RMCS0805JT100R? A: Yes. AC0805JR-07100RL maintains identical ±5% tolerance and 0.125W power rating. This part adds Automotive AEC-Q200 certification and moisture resistance, making it a direct substitute with enhanced reliability features.

Q: Which substitute offers the best availability? A: AF0805FR-07100RL (YAGEO) has the highest inventory at 18,020 pieces. This part provides ±1% tolerance upgrade, 0.125W power rating, anti-sulfur coating, and Automotive AEC-Q200 certification, making it a comprehensive upgrade option with strong supply availability.

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