M40R225M5 Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics M40R225M5 is a 2.2 µF, 50V ceramic capacitor with X7R temperature coefficient in radial through-hole packaging. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for continued circuit implementation. Substitute parts must maintain compatibility across electrical ratings, physical dimensions, and thermal characteristics to ensure reliable circuit operation without redesign.

Substiute Parts

M40R225M5

Cornell Dubilier Electronics (CDE)In Stock: 1115M40R225M5 Datasheet

Current PartRFQ

C340C225K5R5TA

KEMETIn Stock: 3271C340C225K5R5TA Datasheet

UpgradeRFQ

MR075C225MAA

KYOCERA AVXIn Stock: 716MR075C225MAA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M40R225M5 are evaluated based on the following critical parameters:

Electrical Compatibility Requirements:

• Capacitance: 2.2 µF (fixed value)
• Voltage Rating: 50V or higher (minimum requirement)
• Temperature Coefficient: X7R (ensures temperature stability across operating range)
• Operating Temperature Range: -55°C to 125°C (full range support)

Physical Compatibility Requirements:

• Mounting Type: Through Hole (PCB assembly compatibility)
• Package Type: Radial (lead configuration)
• Lead Spacing: 0.200" (5.08mm) or compatible spacing for board layouts

Tolerance Consideration:

• Original part tolerance: ±20%
• Substitutes with ±10% tolerance provide improved performance while maintaining functional equivalence

Two substitute options are identified:

1. Upgrade Option: KEMET C340C225K5R5TA — Active status with improved ±10% tolerance
2. Similar Option: KYOCERA AVX MR075C225MAA — Active status with matching ±20% tolerance

Parameter Comparison

Engineering Selection Recommendations

C340C225K5R5TA (KEMET) — Recommended Primary Substitute: This part is the preferred replacement, offering active product status with ROHS3 compliance. The ±10% tolerance represents an improvement over the original ±20% specification. Physical dimensions are more compact (0.290" length, 0.400" seated height) compared to the original, advantageous for space-constrained applications. Lead spacing remains compatible at 0.200" (5.08mm). Inventory availability (3189 units) supports immediate implementation.

MR075C225MAA (KYOCERA AVX) — Alternative Substitute: This part provides functional equivalence with active product status and identical ±20% tolerance. Physical dimensions differ significantly: 0.490" length and 0.400" lead spacing require PCB layout verification. RoHS non-compliance matches the original part status. Inventory availability (701 units) is lower than the KEMET option. Selection is appropriate when lead spacing accommodation is feasible.

Both substitutes maintain electrical equivalence across all critical parameters: capacitance, voltage rating, temperature coefficient, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the C340C225K5R5TA directly replace the M40R225M5 without PCB modification? A: The C340C225K5R5TA maintains the same lead spacing (0.200" / 5.08mm) as the original. Its more compact physical dimensions (0.290" length vs. 0.400") provide layout flexibility. PCB footprints designed for the original part accommodate this substitute without modification.

Q: What is the impact of tolerance differences between the substitutes? A: The original M40R225M5 and MR075C225MAA both specify ±20% tolerance. The C340C225K5R5TA specifies ±10% tolerance, representing tighter capacitance control. For general-purpose applications, both tolerance levels are functionally compatible. Applications requiring specific capacitance values should account for tolerance ranges in circuit calculations.

Q: Is the MR075C225MAA's different lead spacing (0.400" vs. 0.200") a critical issue? A: The 0.400" lead spacing requires verification against existing PCB hole patterns. The original M40R225M5 and C340C225K5R5TA both use 0.200" spacing. If the target PCB is designed for 0.200" spacing, the MR075C225MAA requires either a new PCB layout or mechanical adaptation. The C340C225K5R5TA is the preferred option for direct substitution without design changes.

Q: Are RoHS compliance differences significant for substitute selection? A: The original M40R225M5 is RoHS non-compliant. The C340C225K5R5TA is ROHS3 compliant, offering environmental and regulatory advantages for new designs. The MR075C225MAA is non-compliant, matching the original status. Compliance selection depends on end-application regulatory requirements.

Q: What are the inventory implications for substitute selection? A: The KEMET C340C225K5R5TA has 3189 units available, supporting high-volume applications. The KYOCERA AVX MR075C225MAA has 701 units available. Both quantities support standard procurement needs. The KEMET option provides superior inventory assurance.

Q: Is the C340C225K5R5TA's smaller physical size compatible with mechanical constraints? A: The C340C225K5R5TA is more compact (0.290" length and 0.400" seated height vs. the original 0.400" length and 0.520" height). This reduces board space requirements and can improve thermal performance in constrained designs. Existing mechanical enclosures and mechanical clearances accommodate smaller components without adjustment.

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