CD19FD821GO3 Equivalent & Substitute Parts

Part Overview

The CD19FD821GO3 is an 820 pF mica capacitor rated for 500 V operation, manufactured by Cornell Dubilier Electronics (CDE) in the CD19 series. This through-hole radial component is designed for general-purpose applications requiring stable capacitance and high voltage performance across an operating temperature range of -55°C to 125°C. The part is currently active in production with 868 units in stock.

Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when supply chain constraints require alternative sourcing, or when design revisions necessitate component verification against functionally identical alternatives.

Key Parameters

Parameter	Value
Capacitance	820 pF
Tolerance	±2%
Voltage - Rated	500 V
Dielectric Material	Mica
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package / Case	Radial
Lead Spacing	0.343" (8.70 mm)
Size / Dimension	0.650" L x 0.209" W (16.50 mm x 5.30 mm)
Height - Seated (Max)	0.512" (13.00 mm)
Features	General Purpose
Series	CD19
Manufacturer	Cornell Dubilier Electronics (CDE)

Substitute Part Grouping Explanation

Substitution of the CD19FD821GO3 is determined by strict equivalence across the following critical parameters:

Capacitance Value: 820 pF (exact match required)
Tolerance: ±2% (exact match required)
Voltage Rating: 500 V (exact match required)
Dielectric Material: Mica (exact match required)
Mounting Type: Through Hole (exact match required)
Package Configuration: Radial (exact match required)
Lead Spacing: 0.343" / 8.70 mm (exact match required)
Physical Dimensions: 0.650" L x 0.209" W / 16.50 mm x 5.30 mm (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

The substitute part CD19FD821GO3F meets all these criteria and is therefore a direct parametric equivalent. Differences in regulatory compliance status (RoHS and REACH) do not affect functional substitution but must be evaluated against application requirements.

Parameter Comparison

Parameter	CD19FD821GO3	CD19FD821GO3F	Match
Manufacturer	Cornell Dubilier Electronics (CDE)	Cornell Dubilier Electronics (CDE)	Yes
Series	CD19	CD19	Yes
Capacitance	820 pF	820 pF	Yes
Tolerance	±2%	±2%	Yes
Voltage - Rated	500 V	500 V	Yes
Dielectric Material	Mica	Mica	Yes
Operating Temperature	-55°C to 125°C	-55°C to 125°C	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	Radial	Radial	Yes
Lead Spacing	0.343" (8.70 mm)	0.343" (8.70 mm)	Yes
Size / Dimension	0.650" L x 0.209" W (16.50 mm x 5.30 mm)	0.650" L x 0.209" W (16.50 mm x 5.30 mm)	Yes
Height - Seated (Max)	0.512" (13.00 mm)	0.512" (13.00 mm)	Yes
Features	General Purpose	General Purpose	Yes
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different
REACH Status	REACH Affected	REACH Unaffected	Different
Product Status	Active	Active	Yes

Engineering Selection Recommendations

CD19FD821GO3F is a direct parametric equivalent to CD19FD821GO3. All electrical and mechanical specifications are identical. The parts differ only in regulatory compliance certifications.

Selection Criteria:

For RoHS3-compliant applications: CD19FD821GO3F is the appropriate choice, as it meets ROHS3 compliance requirements while CD19FD821GO3 does not.
For REACH-restricted applications: CD19FD821GO3F is unaffected by REACH regulations, whereas CD19FD821GO3 is REACH-affected.
For applications without regulatory constraints: Either part is functionally equivalent and interchangeable.
For legacy designs: CD19FD821GO3 remains available with 868 units in stock.
For new designs: CD19FD821GO3F is recommended due to improved regulatory compliance status and higher inventory availability (1176 units in stock).

Both parts carry the same ECCN (EAR99) and HTSUS (8532.29.0020) classifications.

Frequently Asked Questions (FAQ)

Q: Can CD19FD821GO3F be used as a direct replacement for CD19FD821GO3 in existing designs?

A: Yes. CD19FD821GO3F is a direct parametric equivalent. All electrical characteristics, mechanical dimensions, lead spacing, and operating parameters are identical. The parts are pin-compatible and functionally interchangeable in circuit applications.

Q: What is the difference between CD19FD821GO3 and CD19FD821GO3F?

A: The parts are electrically and mechanically identical. The primary differences are regulatory compliance: CD19FD821GO3F is ROHS3 compliant and REACH unaffected, while CD19FD821GO3 is RoHS non-compliant and REACH affected. Both are active production parts from Cornell Dubilier Electronics.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to manufacturing and material sourcing practices, not to electrical performance. Both parts deliver identical capacitance, voltage rating, tolerance, and temperature characteristics.

Q: Are the physical dimensions and lead spacing identical?

A: Yes. Both parts have identical dimensions (0.650" L x 0.209" W), lead spacing (0.343" / 8.70 mm), and maximum seated height (0.512" / 13.00 mm). They fit the same PCB footprint and mounting holes.

Q: Which part should be specified for new designs?

A: CD19FD821GO3F is recommended for new designs due to ROHS3 compliance and higher current inventory (1176 units versus 868 units). This ensures regulatory alignment with modern manufacturing standards and improved supply chain availability.

Q: Can these parts be used interchangeably in high-voltage applications?

A: Yes. Both parts are rated for 500 V operation and are suitable for high-voltage applications within this rating. The mica dielectric provides stable performance across the -55°C to 125°C operating temperature range.

Q: What is the tolerance specification, and does it differ between the two parts?

A: Both parts have ±2% tolerance on the 820 pF capacitance value. This tolerance is identical and ensures consistent performance in circuit applications requiring tight capacitance specifications.

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