CM05FD121JO3 Equivalent & Substitute Parts

Part Overview

The CM05FD121JO3 is a 120 pF mica capacitor rated for 500 V operation, manufactured by Cornell Dubilier Electronics (CDE) in the CM05 series. This through-hole radial component is designed for general-purpose applications requiring high voltage stability and precision capacitance values. The part is currently active in production with 662 units in stock.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across alternative product lines, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Capacitance	120 pF
Tolerance	±5%
Voltage - Rated	500 V
Dielectric Material	Mica
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	Radial
Lead Spacing	0.232" (5.90mm)
Size / Dimension	0.461" L x 0.181" W (11.70mm x 4.60mm)
Height - Seated (Max)	0.370" (9.40mm)
Features	General Purpose

Substitute Part Grouping Explanation

Substitution eligibility for the CM05FD121JO3 is determined by strict equivalence across the following critical parameters:

Capacitance Value: 120 pF (exact match required)
Tolerance: ±5% (exact match required)
Voltage Rating: 500 V (exact match required)
Dielectric Material: Mica (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Mounting Type: Through Hole (exact match required)
Package Configuration: Radial (exact match required)
Lead Spacing: 0.232" (5.90mm) (exact match required)
Physical Dimensions: 0.461" L x 0.181" W, Height 0.370" max (exact match required)

The substitute parts CD15FD121JO3 and CD15FD121JO3F meet all electrical and mechanical equivalence criteria. Both are manufactured by Cornell Dubilier Electronics and belong to the CD15 series, representing alternative product lines with identical functional specifications.

Parameter Comparison

Parameter	CM05FD121JO3	CD15FD121JO3	CD15FD121JO3F
Manufacturer	Cornell Dubilier Electronics (CDE)	Cornell Dubilier Electronics (CDE)	Cornell Dubilier Electronics (CDE)
Capacitance	120 pF	120 pF	120 pF
Tolerance	±5%	±5%	±5%
Voltage - Rated	500 V	500 V	500 V
Dielectric Material	Mica	Mica	Mica
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial
Lead Spacing	0.232" (5.90mm)	0.232" (5.90mm)	0.232" (5.90mm)
Size / Dimension	0.461" L x 0.181" W (11.70mm x 4.60mm)	0.461" L x 0.181" W (11.70mm x 4.60mm)	0.461" L x 0.181" W (11.70mm x 4.60mm)
Height - Seated (Max)	0.370" (9.40mm)	0.370" (9.40mm)	0.370" (9.40mm)
Features	General Purpose	General Purpose	General Purpose
Product Status	Active	Active	Active
Inventory	662 Pcs	1145 Pcs	933 Pcs

Engineering Selection Recommendations

CM05FD121JO3: This part is RoHS non-compliant and REACH Affected. Selection is appropriate for applications where legacy component specifications are required or where RoHS compliance is not mandated.

CD15FD121JO3: This substitute maintains full electrical and mechanical equivalence with the CM05FD121JO3. RoHS compliance status is non-compliant, matching the original part. REACH status is Affected. This part offers higher inventory availability (1145 units) compared to the CM05FD121JO3 (662 units).

CD15FD121JO3F: This substitute provides identical electrical and mechanical specifications while offering ROHS3 compliance and REACH Unaffected status. This variant is suitable for applications requiring modern regulatory compliance. Inventory availability is 933 units.

Selection between these three parts depends on regulatory requirements and supply chain priorities. All three are electrically and mechanically interchangeable for the specified application parameters.

Frequently Asked Questions (FAQ)

Q: Can CD15FD121JO3 and CD15FD121JO3F be used interchangeably with CM05FD121JO3?

A: Yes. Both substitute parts maintain identical capacitance (120 pF), tolerance (±5%), voltage rating (500 V), dielectric material (Mica), operating temperature range (-55°C ~ 125°C), mounting type (Through Hole), package configuration (Radial), lead spacing (0.232"), and physical dimensions. Direct substitution is electrically and mechanically valid.

Q: What is the difference between CD15FD121JO3 and CD15FD121JO3F?

A: The primary differences are regulatory compliance certifications. CD15FD121JO3F is ROHS3 compliant and REACH Unaffected, while CD15FD121JO3 is RoHS non-compliant and REACH Affected. All electrical and mechanical parameters are identical. Selection depends on application regulatory requirements.

Q: Are there any physical footprint differences between these parts?

A: No. All three parts share identical dimensions: 0.461" L x 0.181" W (11.70mm x 4.60mm), maximum seated height of 0.370" (9.40mm), and lead spacing of 0.232" (5.90mm). PCB layout and mounting procedures are identical.

Q: Which substitute part should be selected for new designs?

A: CD15FD121JO3F is recommended for new designs requiring modern regulatory compliance (ROHS3 and REACH Unaffected status). For legacy system replacements or applications without compliance mandates, CD15FD121JO3 offers equivalent performance with higher inventory availability.

Q: Do all three parts have the same operating temperature range?

A: Yes. All three parts operate across the identical temperature range of -55°C to 125°C, ensuring thermal performance equivalence across all specified conditions.

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