ESRH181M04B Equivalent & Substitute Parts Reference

Part Overview

The ESRH181M04B is a 180 µF, 4 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The part delivers 12 mOhm equivalent series resistance with a 1000-hour lifetime rating at 105°C, suitable for general-purpose applications requiring stable capacitance in compact form factors.

Substiute Parts

ESRH181M04B

Cornell Dubilier Electronics (CDE)In Stock: 736ESRH181M04B Datasheet

Current PartRFQ

EEF-CX0G181XR

Panasonic Electronic ComponentsIn Stock: 4233EEF-CX0G181XR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ESRH181M04B is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Voltage Rating: 4 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Type: Aluminum Polymer (exact match required)

Allowable Variation Parameters:

• ESR: Equal or lower values acceptable
• Lifetime @ Temperature: Equal or higher values acceptable
• Ripple Current @ High Frequency: Equal or higher values acceptable
• Height - Seated: Lower or equal values acceptable (board space consideration)
• Product Status: Active preferred over obsolete

The EEF-CX0G181XR from Panasonic Electronic Components meets all mandatory matching criteria and demonstrates improvements in lifetime rating and ripple current capacity, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The EEF-CX0G181XR is a direct functional equivalent to the ESRH181M04B based on electrical and mechanical parameter equivalence. Selection criteria are as follows:

Primary Advantage: The Panasonic EEF-CX0G181XR carries active product status, ensuring long-term availability and supply chain continuity. The ESRH181M04B is obsolete and subject to inventory depletion.

Compliance: Both parts maintain ROHS3 compliance. The Panasonic part additionally carries REACH Unaffected status, providing expanded regulatory coverage for international applications.

Performance Enhancement: The substitute part delivers doubled lifetime rating (2000 hours versus 1000 hours at 105°C) and increased ripple current capacity (5.6 A versus 3 A at 100 kHz), supporting higher-stress operating conditions without electrical parameter degradation.

Physical Footprint: The Panasonic substitute exhibits reduced seated height (1.90 mm versus 4.10 mm), providing improved board layout flexibility while maintaining identical land pattern dimensions.

Packaging: The substitute is supplied in Tape & Reel format, standard for high-volume surface mount assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the EEF-CX0G181XR replace the ESRH181M04B in existing designs without modification?

A: Yes. Both parts share identical capacitance (180 µF), voltage rating (4 V), tolerance (±20%), package footprint (2917 / 7343 Metric), and ESR (12 mOhm). The land pattern and electrical interface are fully compatible. No circuit redesign is required.

Q: What is the significance of the height difference between these parts?

A: The Panasonic substitute is 2.2 mm shorter in seated height (1.90 mm versus 4.10 mm). This reduction improves clearance in space-constrained board layouts and may eliminate mechanical interference with adjacent components. The electrical performance and footprint remain unchanged.

Q: Why is product status important for this substitution?

A: The ESRH181M04B is classified as obsolete, indicating discontinued manufacturing and finite inventory availability. The EEF-CX0G181XR maintains active status, ensuring reliable procurement for current and future production runs. Obsolete parts present supply chain risk and potential cost escalation.

Q: Are there any electrical performance differences that affect circuit operation?

A: No. Both parts deliver identical capacitance, voltage rating, tolerance, and ESR. The Panasonic substitute provides enhanced ripple current capacity (5.6 A versus 3 A) and extended lifetime (2000 hours versus 1000 hours at 105°C), representing performance improvements rather than compromises.

Q: What packaging format is the substitute supplied in?

A: The EEF-CX0G181XR is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly. The ESRH181M04B packaging format was not specified in available data.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both parts are ROHS3 compliant. The Panasonic EEF-CX0G181XR additionally carries REACH Unaffected status, providing compliance confirmation for European and international regulatory frameworks.

Q: Can the substitute handle the same ripple current as the original part?

A: The substitute exceeds the original specification. The EEF-CX0G181XR supports 5.6 A ripple current at 100 kHz, compared to 3 A for the ESRH181M04B. This provides additional margin for high-frequency switching applications.