M30R473M2 Equivalent & Substitute Parts Reference

Part Overview

The Cornell Dubilier Electronics M30R473M2 is a 0.047 µF ceramic capacitor rated at 200V with X7R temperature coefficient, designed for general-purpose applications in through-hole radial configurations. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The M30 series radial ceramic capacitor remains functionally relevant despite its discontinued status, with active equivalent alternatives available from KEMET's GoldMax 300 series offering improved compliance and performance characteristics.

Key Parameters

Parameter	Value	Substitution Relevance
Capacitance	0.047 µF	Critical - must match exactly
Voltage Rating	200V	Critical - minimum acceptable rating
Temperature Coefficient	X7R	Critical - determines stability across temperature range
Tolerance	±20%	Critical - defines acceptable capacitance variation
Mounting Type	Through Hole Radial	Critical - determines PCB compatibility
Lead Spacing	0.200" (5.08mm)	Critical - PCB footprint requirement
Operating Temperature	-55°C to 125°C	Important - application environment compatibility
RoHS Status	RoHS non-compliant	Important - regulatory compliance consideration

Substitute Part Grouping Explanation

Substitution eligibility for the M30R473M2 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

Capacitance value: 0.047 µF (exact match required)
Voltage rating: minimum 200V (equal or higher acceptable)
Lead spacing: 0.200" (5.08mm) (exact match required for PCB compatibility)
Mounting type: Through-hole radial configuration
Operating temperature range: -55°C to 125°C minimum

Acceptable Variation Parameters:

Temperature coefficient: X7R or C0G/NP0 (both acceptable for general-purpose applications)
Tolerance: ±20% or tighter (±1%, ±2%, ±5%, ±10% all acceptable as improvements)
Physical dimensions: Minor variations acceptable if lead spacing and mounting type remain constant
RoHS compliance: Active substitutes offer ROHS3 compliance as improvement over original

Non-Negotiable Requirements:

All substitute parts must maintain 0.200" lead spacing
All substitute parts must be through-hole radial configuration
All substitute parts must support -55°C to 125°C operating range
Capacitance value must be exactly 0.047 µF

The KEMET GoldMax 300 series substitutes meet all critical parameters while offering improved tolerance specifications and RoHS3 compliance. Substitutes are grouped by voltage rating (200V or 250V) and tolerance class (±1%, ±2%, ±5%, ±10%).

Parameter Comparison

Parameter	M30R473M2 (Original)	C330C473F2G5TA	C330C473FAG5TA	C330C473G2G5TA	C330C473GAG5TA	C330C473J2G5TA	C330C473JAG5TA	C330C473K2G5TA	C330C473K2R5TA	C330C473KAG5TA	C340C473J2G5TA
Manufacturer	Cornell Dubilier	KEMET	KEMET	KEMET	KEMET	KEMET	KEMET	KEMET	KEMET	KEMET	KEMET
Capacitance	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF	0.047 µF
Voltage Rating	200V	200V	250V	200V	250V	200V	250V	200V	200V	250V	200V
Tolerance	±20%	±1%	±1%	±2%	±2%	±5%	±5%	±10%	±10%	±10%	±5%
Temperature Coefficient	X7R	C0G/NP0	C0G/NP0	C0G/NP0	C0G/NP0	C0G/NP0	C0G/NP0	C0G/NP0	X7R	C0G/NP0	C0G/NP0
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial	Through Hole Radial
Lead Spacing	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	1105 Pcs In Stock	1046 Pcs In Stock	975 Pcs In Stock	696 Pcs In Stock	851 Pcs In Stock	993 Pcs In Stock	793 Pcs In Stock	816 Pcs In Stock	9524 Pcs In Stock	875 Pcs In Stock	997 Pcs In Stock

Engineering Selection Recommendations

Direct Functional Equivalent (Identical Temperature Coefficient):

C330C473K2R5TA is the primary direct equivalent, maintaining X7R temperature coefficient identical to the M30R473M2 while offering ROHS3 compliance and active product status. This part provides the closest functional match with 9524 units in inventory, ensuring supply continuity. The ±10% tolerance is acceptable as it remains within the original ±20% specification envelope.

Improved Tolerance Alternatives (C0G/NP0 Temperature Coefficient):

All remaining KEMET substitutes employ C0G/NP0 temperature coefficient, which provides superior stability characteristics compared to X7R across the operating temperature range. These alternatives are suitable for applications where improved tolerance and temperature stability enhance circuit performance:

±1% Tolerance: C330C473F2G5TA (200V) and C330C473FAG5TA (250V) offer highest precision
±2% Tolerance: C330C473G2G5TA (200V) and C330C473GAG5TA (250V) balance precision with cost
±5% Tolerance: C330C473J2G5TA (200V), C330C473JAG5TA (250V), and C340C473J2G5TA (200V) provide moderate precision improvement
±10% Tolerance: C330C473K2G5TA (200V) and C330C473KAG5TA (250V) match original tolerance specification

Voltage Rating Selection:

200V-rated substitutes (C330C473F2G5TA, C330C473G2G5TA, C330C473J2G5TA, C330C473K2G5TA, C330C473K2R5TA, C340C473J2G5TA) maintain exact voltage specification. 250V-rated alternatives (C330C473FAG5TA, C330C473GAG5TA, C330C473JAG5TA, C330C473KAG5TA) provide voltage margin for applications requiring enhanced reliability.

Compliance Consideration:

All KEMET substitutes achieve ROHS3 compliance, addressing regulatory requirements that the obsolete M30R473M2 does not meet. This compliance upgrade is mandatory for new designs and recommended for legacy system updates.

Frequently Asked Questions (FAQ)

Q: Can C0G/NP0 temperature coefficient substitutes replace the X7R original part?

A: Yes. C0G/NP0 ceramic capacitors are functionally compatible with X7R applications. C0G/NP0 provides superior temperature stability with capacitance variation typically ±0.3% per °C compared to X7R's ±15% across the operating range. For general-purpose applications, this represents an improvement. The C330C473K2R5TA maintains X7R specification if identical temperature coefficient is required.

Q: What is the significance of tolerance differences (±1%, ±2%, ±5%, ±10%, ±20%)?

A: Tolerance defines the acceptable capacitance variation from the nominal 0.047 µF value. The original M30R473M2 specifies ±20%, meaning actual capacitance ranges from 0.0376 µF to 0.0564 µF. Tighter tolerances (±1%, ±2%, ±5%, ±10%) reduce this variation range, improving circuit predictability and performance. Selection depends on application requirements; general-purpose circuits typically accept ±10% or ±20%, while precision circuits benefit from ±1% to ±5%.

Q: Are all substitute parts physically compatible with existing PCB layouts?

A: Lead spacing compatibility is confirmed at 0.200" (5.08mm) for all substitutes. Physical dimensions vary slightly: the original M30R473M2 measures 0.300" L × 0.200" W with 0.420" seated height, while most KEMET C330C substitutes measure 0.280" L × 0.160" W with 0.360" seated height. The C340C473J2G5TA measures 0.290" L × 0.160" W with 0.500" seated height. These dimensional differences do not affect lead spacing or mounting compatibility but may impact board layout clearances. Verify physical clearance in confined spaces before substitution.

Q: Why is C330C473K2R5TA recommended as the primary substitute?

A: C330C473K2R5TA maintains X7R temperature coefficient identical to the original M30R473M2, ensuring functional equivalence without circuit redesign. It achieves ROHS3 compliance, holds active product status with 9524 units in inventory (highest availability), and operates across the identical -55°C to 125°C temperature range. The ±10% tolerance remains within the original ±20% specification, making it a direct drop-in replacement.

Q: What is the difference between 200V and 250V rated substitutes?

A: Both voltage ratings are electrically compatible in 200V applications. The 250V-rated parts (C330C473FAG5TA, C330C473GAG5TA, C330C473JAG5TA, C330C473KAG5TA) provide 25% additional voltage margin, enhancing reliability in applications subject to voltage transients or overstress conditions. Selection depends on circuit design margins and reliability requirements; 200V-rated parts are sufficient for standard applications, while 250V-rated parts offer enhanced safety margin.

Q: Are KEMET GoldMax 300 series parts direct replacements or upgrades?

A: KEMET GoldMax 300 series parts function as direct replacements with performance upgrades. All maintain identical capacitance (0.047 µF), voltage rating (200V or 250V), lead spacing (0.200"), and mounting configuration (through-hole radial). Upgrades include: improved tolerance specifications (±1% to ±10% versus ±20%), superior temperature stability (C0G/NP0 coefficient), ROHS3 compliance, and active product status ensuring long-term availability.

Q: Can the M30R473M2 be used interchangeably with C340C473J2G5TA?

A: Yes, with physical dimension consideration. Both parts share identical electrical specifications: 0.047 µF capacitance, 200V rating, ±5% tolerance, C0G/NP0 temperature coefficient, and 0.200" lead spacing. The C340C473J2G5TA differs in physical dimensions (0.290" L × 0.160" W × 0.500" seated height versus M30R473M2's 0.300" L × 0.200" W × 0.420" seated height). Verify PCB layout clearances, particularly in height-constrained applications, before substitution.

Q: What inventory considerations apply to substitute selection?

A: C330C473K2R5TA offers maximum inventory availability with 9524 units in stock, ensuring supply security for high-volume applications. Other substitutes range from 696 to 997 units in inventory. For applications requiring immediate availability or large quantities, C330C473K2R5TA is the optimal choice. For applications with flexible timelines, alternative tolerance or voltage ratings may be selected based on circuit requirements.

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