476SML6R3M Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The 476SML6R3M is a 47 µF, 6.3 V aluminum electrolytic capacitor in surface mount radial can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is classified as Active product status and is designed for general purpose applications requiring compact SMD form factor with polar electrolytic technology.

Substitute parts become necessary when the 476SML6R3M reaches end-of-life inventory depletion, when alternative manufacturers are required for supply chain diversification, or when design requirements necessitate enhanced performance characteristics such as reduced ESR, extended lifetime ratings, or improved ripple current handling.

Substiute Parts

476SML6R3M

Cornell Dubilier / Illinois CapacitorIn Stock: 856476SML6R3M Datasheet

Current PartRFQ

ATB476M6R3

Cornell Dubilier / Illinois CapacitorIn Stock: 21023ATB476M6R3 Datasheet

UpgradeRFQ

AVE476M06C12T-F

Cornell Dubilier Electronics (CDE)In Stock: 952AVE476M06C12T-F Datasheet

Parametric EquivalentRFQ

UWJ0J470MCL1GB

NichiconIn Stock: 5450UWJ0J470MCL1GB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 476SML6R3M is determined by strict adherence to the following core electrical and mechanical parameters:

Mandatory Matching Parameters:

• Capacitance: 47 µF (exact match required)
• Voltage Rating: 6.3 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package / Case: Radial, Can - SMD (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Size / Dimension: 0.197" Dia (5.00mm) (exact match required)

Allowable Parameter Variations:

• ESR @ 120Hz: Lower values are acceptable (improved performance)
• Lifetime @ Temperature: Higher values are acceptable (extended reliability)
• Operating Temperature Range: Extended ranges are acceptable
• Ripple Current: Higher values are acceptable (improved current handling)
• Height - Seated: Minor variations acceptable within PCB assembly constraints
• Surface Mount Land Size: Minor variations acceptable within reflow soldering process window

Compliance Requirements:

• RoHS3 Compliance: Required
• Moisture Sensitivity Level: 1 (Unlimited) preferred
• REACH Status: Unaffected or Affected (both acceptable)

Three substitute parts meet these criteria and are presented in the following parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

ATB476M6R3 (Upgrade Substitute)

The ATB476M6R3 is classified as an upgrade substitute due to superior electrical performance characteristics. This part maintains Active product status, ensuring long-term availability and supply chain stability. The ATB series demonstrates reduced ESR (3.39 Ohm versus 9.877 Ohm), extended lifetime rating (3000 Hrs @ 105°C versus 2000 Hrs @ 85°C), and significantly improved ripple current capacity (112 mA @ 120 Hz versus 52 mA). The extended operating temperature range (-55°C ~ 105°C) provides additional thermal margin. Height variation (5.70mm versus 5.50mm) and surface mount land size variation (6.00mm x 5.50mm versus 5.30mm x 5.30mm) require PCB layout verification prior to implementation. ROHS3 compliance and unlimited moisture sensitivity level are maintained. This substitute is suitable for applications requiring enhanced thermal performance and reduced power dissipation.

AVE476M06C12T-F (Parametric Equivalent)

The AVE476M06C12T-F provides parametric equivalence with the 476SML6R3M, maintaining identical ESR (9.88 Ohm), lifetime rating (2000 Hrs @ 85°C), and operating temperature range (-40°C ~ 85°C). Mechanical dimensions and surface mount land size are identical. However, this part carries Obsolete product status, indicating discontinued manufacturing and limited inventory availability (894 Pcs). ROHS3 compliance and unlimited moisture sensitivity level are maintained. This substitute is suitable only for legacy system maintenance or when specific AVE series compatibility is required, with the understanding that future availability cannot be assured.

UWJ0J470MCL1GB (Parametric Equivalent)

The UWJ0J470MCL1GB from Nichicon provides parametric equivalence with identical capacitance, voltage rating, tolerance, and operating temperature range. Mechanical dimensions and surface mount land size are identical. ESR value is not specified in available documentation. Ripple current specifications (45 mA @ 120 Hz) are lower than the main part. This part carries Obsolete product status with limited inventory (5387 Pcs). REACH Status is listed as Affected, requiring compliance verification for applications subject to REACH regulations. ROHS3 compliance and unlimited moisture sensitivity level are maintained. This substitute is suitable for legacy system maintenance or when Nichicon component compatibility is required, with the understanding that future availability cannot be assured and REACH compliance must be confirmed for the specific application.

Frequently Asked Questions (FAQ)

Q1: Can ATB476M6R3 be used as a direct replacement for 476SML6R3M without PCB modification?

The ATB476M6R3 differs in height (5.70mm versus 5.50mm) and surface mount land size (6.00mm x 5.50mm versus 5.30mm x 5.30mm). Direct replacement without PCB modification is not possible. PCB layout must be verified to accommodate the larger land size and increased height. Reflow soldering process parameters may require adjustment to ensure proper solder joint formation on the modified land pattern.

Q2: What is the significance of "Obsolete" product status for AVE476M06C12T-F and UWJ0J470MCL1GB?

Obsolete product status indicates that the manufacturer has discontinued production of these parts. While current inventory may be available through authorized distributors, future procurement cannot be guaranteed. These parts are suitable only for immediate replacement needs or legacy system maintenance. For new designs or long-term production requirements, Active status parts such as ATB476M6R3 are recommended.

Q3: Why does ATB476M6R3 have significantly lower ESR than the main part?

ESR (Equivalent Series Resistance) is determined by internal construction, electrolyte chemistry, and manufacturing process. The ATB476M6R3 demonstrates improved ESR (3.39 Ohm) through enhanced internal design, resulting in lower power dissipation and improved high-frequency performance. This is a performance enhancement, not a deviation from specification.

Q4: Is REACH compliance status critical for part selection?

REACH compliance status must be verified based on application requirements and regulatory jurisdiction. The main part (476SML6R3M) and ATB476M6R3 are REACH Unaffected, indicating no regulatory restrictions. UWJ0J470MCL1GB is REACH Affected, requiring compliance verification for applications subject to REACH regulations. Consult regulatory requirements for your specific application before final part selection.

Q5: Can ripple current specifications be used to determine thermal performance?

Ripple current capacity is directly related to internal ESR and thermal design. Higher ripple current capacity indicates lower power dissipation at equivalent current levels. ATB476M6R3 supports 112 mA @ 120 Hz compared to 52 mA for the main part, indicating superior thermal performance. However, ripple current specifications alone do not determine absolute temperature rise; actual thermal performance depends on PCB thermal design, ambient conditions, and component placement.

Q6: What is the practical difference between 2000 Hrs @ 85°C and 3000 Hrs @ 105°C lifetime ratings?

These ratings represent accelerated life testing at specified temperature conditions. ATB476M6R3 (3000 Hrs @ 105°C) demonstrates extended reliability at higher temperature stress compared to the main part (2000 Hrs @ 85°C). The higher temperature rating indicates superior electrolyte stability and internal construction. For applications operating at elevated temperatures or requiring extended service life, the ATB476M6R3 provides enhanced reliability margin.

Q7: Are there any compatibility issues with existing PCB assembly processes?

All substitute parts maintain identical capacitance, voltage rating, tolerance, and polarization. Surface mount mounting type is consistent across all parts. However, ATB476M6R3 requires PCB layout modification due to different land size and height. AVE476M06C12T-F and UWJ0J470MCL1GB are mechanically compatible with existing PCB layouts. Reflow soldering temperature profiles and solder paste specifications remain unchanged for all substitutes.

Q8: Which substitute part should be selected for new product designs?

For new product designs, ATB476M6R3 is the recommended substitute. This part maintains Active product status, ensuring long-term availability and supply chain stability. Superior electrical performance characteristics (reduced ESR, extended lifetime, improved ripple current) provide design margin and enhanced reliability. PCB layout modification is required but represents a one-time engineering effort with long-term supply security benefits.