M40R104M2 Equivalent & Substitute Parts Reference

Part Overview

The M40R104M2 is a 0.1 µF ±20% 200V ceramic capacitor with X7R temperature coefficient manufactured by Cornell Dubilier Electronics (CDE) in radial through-hole configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production, maintenance, and design updates. The radial lead spacing of 0.200" (5.08mm) and straight lead style define the mechanical compatibility envelope for substitution.

Substiute Parts

M40R104M2

Cornell Dubilier Electronics (CDE)In Stock: 1058M40R104M2 Datasheet

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C330C104F2G5TA

KEMETIn Stock: 760C330C104F2G5TA Datasheet

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C330C104FAG5TA

KEMETIn Stock: 1198C330C104FAG5TA Datasheet

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C330C104G2G5TA

KEMETIn Stock: 750C330C104G2G5TA Datasheet

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C330C104GAG5TA

KEMETIn Stock: 1085C330C104GAG5TA Datasheet

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C330C104J2G5TA

KEMETIn Stock: 1143C330C104J2G5TA Datasheet

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C330C104JAG5TA

KEMETIn Stock: 762C330C104JAG5TA Datasheet

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C330C104K2G5TA

KEMETIn Stock: 969C330C104K2G5TA Datasheet

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C330C104K2R5TA

KEMETIn Stock: 19971C330C104K2R5TA Datasheet

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C330C104KAG5TA

KEMETIn Stock: 812C330C104KAG5TA Datasheet

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C330C104KCR5TA

KEMETIn Stock: 1956C330C104KCR5TA Datasheet

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C330C104MCR5TA

KEMETIn Stock: 5588C330C104MCR5TA Datasheet

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C340C104K2R5TA

KEMETIn Stock: 1201C340C104K2R5TA Datasheet

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SR657C104KAR

KYOCERA AVXIn Stock: 1526SR657C104KAR Datasheet

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C330C104M2R5TA

KEMETIn Stock: 1174C330C104M2R5TA Datasheet

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MR072C104MAA

KYOCERA AVXIn Stock: 883MR072C104MAA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the M40R104M2 is determined by the following criteria:

Primary Matching Criteria:

• Capacitance value: 0.1 µF (exact match required)
• Lead spacing: 0.200" (5.08mm) (exact match required for PCB hole alignment)
• Mounting type: Through-hole radial (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Secondary Matching Criteria:

• Voltage rating: Substitute must be rated 200V or higher
• Tolerance: Substitute tolerance must be ±20% or tighter
• Temperature coefficient: X7R or C0G/NP0 (both acceptable for general-purpose applications)

Substitute Categories:

Category A – Direct X7R Equivalents (Same Temperature Coefficient):

• C330C104K2R5TA: 0.1 µF ±10% 200V X7R (tighter tolerance, same voltage)
• C330C104KCR5TA: 0.1 µF ±10% 500V X7R (tighter tolerance, higher voltage)

Category B – C0G/NP0 Upgrades (Superior Temperature Stability):

• C330C104F2G5TA: 0.1 µF ±1% 200V C0G (tighter tolerance, same voltage)
• C330C104FAG5TA: 0.1 µF ±1% 250V C0G (tighter tolerance, higher voltage)
• C330C104G2G5TA: 0.1 µF ±2% 200V C0G (tighter tolerance, same voltage)
• C330C104GAG5TA: 0.1 µF ±2% 250V C0G (tighter tolerance, higher voltage)
• C330C104J2G5TA: 0.1 µF ±5% 200V C0G (tighter tolerance, same voltage)
• C330C104JAG5TA: 0.1 µF ±5% 250V C0G (tighter tolerance, higher voltage)
• C330C104K2G5TA: 0.1 µF ±10% 200V C0G (equivalent tolerance, same voltage)
• C330C104KAG5TA: 0.1 µF ±10% 250V C0G (equivalent tolerance, higher voltage)

All substitute parts maintain the 0.200" (5.08mm) lead spacing and through-hole radial configuration required for direct PCB compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance):

Select C330C104K2R5TA when the application requires X7R temperature coefficient matching and 200V voltage rating. This part offers tighter tolerance (±10% vs. ±20%), active product status, ROHS3 compliance, and significantly higher inventory availability (19,861 pcs). The formed lead style accommodates standard through-hole assembly processes.

For Higher Voltage Margin:

Select C330C104KCR5TA when the circuit design benefits from increased voltage headroom. This 500V-rated X7R capacitor maintains the same 0.1 µF capacitance and ±10% tolerance while providing 2.5× voltage derating margin. Active product status and ROHS3 compliance support modern supply chain requirements.

For Superior Temperature Stability:

Select from the C0G/NP0 series (C330C104F2G5TA, C330C104G2G5TA, C330C104J2G5TA, or C330C104K2G5TA) when circuit performance depends on minimal capacitance variation across the -55°C to 125°C operating range. C0G temperature coefficient provides superior stability compared to X7R. All variants are active products with ROHS3 compliance.

For Tolerance-Critical Applications:

Select C330C104F2G5TA (±1% tolerance) or C330C104G2G5TA (±2% tolerance) when circuit design requires tighter capacitance control than the original ±20% specification.

For Higher Voltage with Improved Stability:

Select C330C104FAG5TA (250V, ±1% C0G) or C330C104GAG5TA (250V, ±2% C0G) to combine elevated voltage rating with superior temperature coefficient performance.

All recommended substitutes maintain the 0.200" (5.08mm) lead spacing and through-hole radial mounting configuration, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can C330C104K2R5TA directly replace M40R104M2 without PCB modification?

A: Yes. Both parts share identical lead spacing (0.200" / 5.08mm), radial through-hole configuration, and operating temperature range (-55°C to 125°C). The C330C104K2R5TA offers tighter tolerance (±10% vs. ±20%) and active product status. No PCB layout changes are required.

Q: What is the difference between X7R and C0G temperature coefficients?

A: X7R provides ±15% capacitance change across the -55°C to 125°C range. C0G (NP0) provides ±30 ppm/°C, resulting in negligible capacitance variation. For general-purpose applications, both are functionally equivalent. For precision circuits, C0G offers superior stability.

Q: Why do some substitutes have higher voltage ratings (250V or 500V)?

A: Higher voltage ratings provide design margin and derating headroom. A 250V or 500V capacitor in a 200V circuit operates at lower stress levels, potentially improving reliability and lifespan. Selection depends on circuit requirements and available board space.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All KEMET substitute parts listed carry ROHS3 compliance certification. The original M40R104M2 is RoHS non-compliant. If RoHS compliance is required for your application, any KEMET substitute satisfies this requirement.

Q: What is the physical size difference between M40R104M2 and substitute parts?

A: The M40R104M2 measures 0.400" L × 0.200" W (10.16mm × 5.08mm) with 0.520" seated height. KEMET substitutes measure 0.280" L × 0.160" W (7.11mm × 4.07mm) with 0.360" to 0.420" seated height. Substitutes are physically smaller but maintain the same 0.200" lead spacing for PCB hole compatibility.

Q: Can I use C330C104KCR5TA (500V) in place of M40R104M2 (200V)?

A: Yes. The 500V rating exceeds the 200V requirement. The 0.1 µF capacitance, ±10% tolerance, X7R temperature coefficient, and 0.200" lead spacing match the substitution criteria. The higher voltage rating provides additional design margin.

Q: Which substitute offers the best inventory availability?

A: C330C104K2R5TA has the highest inventory level at 19,861 pcs. This X7R variant with ±10% tolerance and 200V rating provides immediate availability for production requirements.

Q: Are formed leads and straight leads interchangeable?

A: Both lead styles accommodate standard through-hole assembly. Formed leads (pre-bent) may simplify manual insertion. Straight leads require manual bending or automated insertion equipment. PCB hole spacing compatibility (0.200" / 5.08mm) is the critical factor, not lead style.

Q: What tolerance should I select for my application?

A: If the original ±20% tolerance was acceptable, any substitute with equal or tighter tolerance (±1%, ±2%, ±5%, ±10%) is suitable. Tighter tolerance substitutes provide improved circuit performance without additional cost in most cases.