M15G479D2 Equivalent & Substitute Parts

Part Overview

The M15G479D2 is a 4.7 pF ceramic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the M15 series. This radial through-hole component is rated for 200V with C0G/NP0 temperature coefficient and operates across -55°C to 125°C. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts maintain the same capacitance value and core electrical characteristics while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Capacitance	4.7 pF
Tolerance	±0.5pF
Voltage Rating	200V
Temperature Coefficient	C0G, NP0
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Package Type	Radial
Lead Spacing	0.100" (2.54mm)
Lead Style	Straight

Substitute Part Grouping Explanation

Substitution of the M15G479D2 is determined by strict electrical and mechanical compatibility criteria. All substitute parts must maintain the following parameters:

Critical Electrical Parameters:

Capacitance: 4.7 pF (exact match required)
Temperature Coefficient: C0G/NP0 (mandatory for frequency stability)
Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
Lead Spacing: 0.100" (2.54mm) (required for PCB compatibility)

Voltage Rating Consideration: Substitute parts rated at 250V are electrically compatible with 200V applications, as higher voltage ratings provide derating margin and improved reliability. Parts rated at 200V provide direct equivalence.

Tolerance Variations: Substitute parts with tighter tolerances (±0.1pF, ±0.25pF) are compatible with applications requiring the ±0.5pF tolerance of the original part. Tolerance is not a limiting factor for substitution.

Physical Dimensions: Lead spacing of 0.100" (2.54mm) is the controlling dimension for PCB hole pattern compatibility. Variations in body length and width do not affect electrical substitution but may impact board layout considerations.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Operating Temp	Lead Spacing	Product Status	RoHS Status
M15G479D2	Cornell Dubilier Electronics	4.7 pF	±0.5pF	200V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Obsolete	RoHS non-compliant
C315C479BAG5TA	KEMET	4.7 pF	±0.1pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C315C479CAG5TA	KEMET	4.7 pF	±0.25pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C315C479DAG5TA	KEMET	4.7 pF	±0.5pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C320C479BAG5TA	KEMET	4.7 pF	±0.1pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C320C479CAG5TA	KEMET	4.7 pF	±0.25pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C320C479DAG5TA	KEMET	4.7 pF	±0.5pF	250V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
C315C479D2G5TA	KEMET	4.7 pF	±0.5pF	200V	C0G, NP0	-55°C ~ 125°C	0.100" (2.54mm)	Active	ROHS3 Compliant
MR052A4R7DAA	KYOCERA AVX	4.7 pF	±0.5pF	200V	C0G, NP0	-55°C ~ 125°C	0.200" (5.08mm)	Active	RoHS non-compliant

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Rating): The C315C479D2G5TA from KEMET provides direct electrical equivalence to the M15G479D2. Both components are rated at 200V with ±0.5pF tolerance and identical operating temperature range. The C315C479D2G5TA is active in production with ROHS3 compliance, addressing the obsolescence and compliance limitations of the original part. This part is the primary recommendation for direct replacement in existing designs.

Upgraded Substitutes (Higher Voltage Rating): The KEMET C315C and C320C series parts rated at 250V are electrically compatible substitutes. The 250V rating provides additional derating margin and improved reliability in 200V applications. These parts are available in multiple tolerance grades (±0.1pF, ±0.25pF, ±0.5pF) and all carry ROHS3 compliance. Selection among these parts depends on tolerance requirements and physical space constraints:

C315C series: Compact body (0.150" L x 0.100" W, 3.81mm x 2.54mm)
C320C series: Larger body (0.200" L x 0.125" W, 5.08mm x 3.18mm)

Alternative Substitute (Different Lead Spacing): The MR052A4R7DAA from KYOCERA AVX (Ceralam® MR series) matches the electrical specifications of the M15G479D2 but features 0.200" (5.08mm) lead spacing instead of 0.100" (2.54mm). This part is suitable only for applications where PCB hole patterns accommodate the wider lead spacing. The MR052A4R7DAA is not RoHS compliant, limiting its use in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 250V-rated capacitor in place of a 200V-rated capacitor?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. The 250V-rated KEMET substitutes (C315C and C320C series) are suitable for 200V applications.

Q: What is the difference between C315C and C320C series parts?

A: Both series are electrically identical 4.7 pF C0G/NP0 capacitors with 250V rating. The primary difference is physical size. C315C parts have a compact body (0.150" L x 0.100" W), while C320C parts have a larger body (0.200" L x 0.125" W). Both maintain the same 0.100" (2.54mm) lead spacing for PCB compatibility.

Q: Does tolerance affect substitution compatibility?

A: No. Tighter tolerances (±0.1pF, ±0.25pF) are compatible with applications requiring ±0.5pF tolerance. The original M15G479D2 tolerance of ±0.5pF is the maximum allowable; substitute parts with tighter tolerances meet or exceed this requirement.

Q: Why is the MR052A4R7DAA not recommended as a primary substitute?

A: The MR052A4R7DAA has 0.200" (5.08mm) lead spacing, which differs from the M15G479D2 standard of 0.100" (2.54mm). This requires PCB redesign and is not suitable for direct board-level replacement. Additionally, this part is not RoHS compliant.

Q: What is the significance of C0G/NP0 temperature coefficient?

A: C0G/NP0 designation indicates minimal capacitance change across the operating temperature range (-55°C to 125°C). This stability is critical for frequency-dependent applications and timing circuits. All substitute parts maintain this specification.

Q: Is the C315C479D2G5TA a direct replacement for the M15G479D2?

A: Yes. The C315C479D2G5TA is a direct replacement. It matches the 200V rating, ±0.5pF tolerance, and 0.100" (2.54mm) lead spacing of the original part. The primary advantages are active production status and ROHS3 compliance.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet the circuit's electrical requirements. However, using a single part number throughout a design simplifies procurement, inventory management, and traceability.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive, restricting lead, cadmium, mercury, and other hazardous materials. This is required for many regulated markets and applications.

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