RMCS0805FT511R Equivalent & Substitute Parts

Part Overview

The RMCS0805FT511R is a 511 Ohm ±1% 0.125W (1/8W) chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This anti-sulfur thick film resistor operates across -55°C to 155°C and is ROHS3 compliant. The part is active in production with 933 pieces currently in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced pulse withstanding capabilities.

Substiute Parts

RMCS0805FT511R

Stackpole Electronics IncIn Stock: 991RMCS0805FT511R Datasheet

Current PartRFQ

RMCF0805FT511R

Stackpole Electronics IncIn Stock: 72263RMCF0805FT511R Datasheet

MFR RecommendedRFQ

AC0805FR-07511RL

YAGEOIn Stock: 3935AC0805FR-07511RL Datasheet

MFR RecommendedRFQ

CRCW0805511RFKEA

Vishay DaleIn Stock: 34912CRCW0805511RFKEA Datasheet

MFR RecommendedRFQ

CRCW0805511RFKEAHP

Vishay DaleIn Stock: 21465CRCW0805511RFKEAHP Datasheet

MFR RecommendedRFQ

CRCW0805511RFKTA

Vishay DaleIn Stock: 5266CRCW0805511RFKTA Datasheet

MFR RecommendedRFQ

ERJ-6ENF5110V

Panasonic Electronic ComponentsIn Stock: 77977ERJ-6ENF5110V Datasheet

MFR RecommendedRFQ

RC0805FR-07511RL

YAGEOIn Stock: 346601RC0805FR-07511RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (511 Ohms), tolerance (±1%), package type (0805 / 2012 Metric), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and termination count (2). All identified substitute parts meet these core electrical and mechanical requirements.

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

Category 1: 0.125W (1/8W) Equivalents — Direct functional replacements with identical power rating. These include RMCF0805FT511R (Stackpole, automotive AEC-Q200), AC0805FR-07511RL (YAGEO, automotive AEC-Q200 with moisture resistance), CRCW0805511RFKEA (Vishay Dale, automotive AEC-Q200), CRCW0805511RFKTA (Vishay Dale, automotive AEC-Q200), ERJ-6ENF5110V (Panasonic, automotive AEC-Q200), and RC0805FR-07511RL (YAGEO, moisture resistant).

Category 2: Enhanced Power Rating — CRCW0805511RFKEAHP (Vishay Dale, 0.5W / 1/2W with pulse withstanding capability). This part exceeds the power specification of the main part and is suitable for applications requiring higher transient energy dissipation.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring automotive qualification, RMCF0805FT511R, AC0805FR-07511RL, CRCW0805511RFKEA, CRCW0805511RFKEAHP, and ERJ-6ENF5110V all carry AEC-Q200 certification. CRCW0805511RFKTA is not recommended for new designs due to RoHS non-compliance status.

For standard industrial and consumer applications with ROHS3 compliance requirements, RC0805FR-07511RL offers the highest inventory availability (346,591 pieces) with moisture-resistant thick film construction. AC0805FR-07511RL and ERJ-6ENF5110V provide automotive-grade alternatives with strong stock levels.

CRCW0805511RFKEAHP is selected when applications require pulse withstanding capability or higher transient energy dissipation, as its 0.5W power rating exceeds the 0.125W specification of the main part.

Height variation across substitute parts ranges from 0.020" to 0.028". PCB layout constraints should be verified when selecting parts with maximum seated heights differing from the original RMCS0805FT511R specification (0.024").

Frequently Asked Questions (FAQ)

Q: Can CRCW0805511RFKEAHP (0.5W) be used as a direct replacement for RMCS0805FT511R (0.125W)?

A: Yes, from an electrical and mechanical standpoint. The higher power rating provides additional thermal margin and is backward compatible. However, verify that the application does not impose strict power dissipation limits or thermal constraints that would be affected by the different resistor characteristics.

Q: What is the difference between anti-sulfur and moisture-resistant thick film construction?

A: Anti-sulfur construction (RMCS0805FT511R) protects against sulfur contamination in high-sulfur environments. Moisture-resistant construction (RC0805FR-07511RL, AC0805FR-07511RL) provides protection against moisture ingress. Selection depends on the specific environmental exposure of the application.

Q: Are all substitute parts suitable for automotive applications?

A: Parts carrying AEC-Q200 certification (RMCF0805FT511R, AC0805FR-07511RL, CRCW0805511RFKEA, CRCW0805511RFKEAHP, ERJ-6ENF5110V) are qualified for automotive use. RMCS0805FT511R and RC0805FR-07511RL lack automotive certification and are suitable for industrial and consumer applications.

Q: Does the height difference between substitute parts affect PCB assembly?

A: Height variation ranges from 0.020" to 0.028" (maximum seated height). Verify that reflow oven profiles, solder paste thickness, and component placement tolerances accommodate the selected part's height specification. Consult assembly process documentation for compatibility.

Q: Why is CRCW0805511RFKTA listed if it is RoHS non-compliant?

A: CRCW0805511RFKTA is included for reference in legacy system maintenance or applications where RoHS compliance is not required. For new designs, ROHS3-compliant alternatives are recommended.

Q: What inventory considerations should guide part selection?

A: RC0805FR-07511RL (346,591 pieces) and ERJ-6ENF5110V (77,932 pieces) offer the highest availability. RMCF0805FT511R (72,220 pieces) provides strong stock for automotive-qualified applications. AC0805FR-07511RL (3,872 pieces) and CRCW0805511RFKTA (5,200 pieces) have limited availability and should be evaluated for long-term supply chain planning.