CD19FD681FO3 Equivalent & Substitute Parts

Part Overview

The CD19FD681FO3 is a 680 pF mica capacitor rated for 500 V with ±1% tolerance, manufactured by Cornell Dubilier Electronics (CDE). This through-hole radial component is designed for general-purpose applications requiring stable capacitance and high voltage performance across the operating temperature range of -55°C to 125°C. The part is currently active in production with 993 units in stock.

Identification of substitute parts becomes necessary when the original part number is unavailable, when compliance requirements change, or when inventory constraints require alternative sourcing from the same manufacturer's product line.

Substiute Parts

CD19FD681FO3

Cornell Dubilier Electronics (CDE)In Stock: 1045CD19FD681FO3 Datasheet

Current PartRFQ

CD19FD681FO3F

Cornell Dubilier Electronics (CDE)In Stock: 1426CD19FD681FO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD19FD681FO3 are identified based on strict parametric equivalence within the Cornell Dubilier Electronics CD19 mica capacitor series. The substitution logic is based on the following criteria:

Primary Matching Parameters:

• Capacitance value: 680 pF (exact match required)
• Tolerance: ±1% (exact match required)
• Voltage rating: 500 V (exact match required)
• Dielectric type: Mica (exact match required)
• Mounting configuration: Through Hole Radial (exact match required)
• Lead spacing: 0.343" / 8.70 mm (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Parts meeting all primary parameters are classified as parametric equivalents and are electrically and mechanically interchangeable. Differences in compliance status (RoHS, REACH) do not affect electrical substitutability but may impact procurement and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

CD19FD681FO3F as Primary Substitute:

The CD19FD681FO3F is a direct parametric equivalent to the CD19FD681FO3. Both parts are manufactured by Cornell Dubilier Electronics within the CD19 series and share identical electrical and mechanical specifications across all critical parameters: capacitance, tolerance, voltage rating, dielectric material, mounting type, lead spacing, and operating temperature range.

The CD19FD681FO3F differs from the original part in compliance certifications. It is ROHS3 compliant and REACH unaffected, whereas the CD19FD681FO3 is RoHS non-compliant and REACH affected. Selection between these two parts should be based on regulatory requirements applicable to the end application and geographic market.

Both parts are active products with adequate inventory availability. The CD19FD681FO3F has higher stock levels (1338 units versus 993 units), which may provide supply chain advantages.

Frequently Asked Questions (FAQ)

Q: Can CD19FD681FO3F be used as a direct replacement for CD19FD681FO3?

A: Yes. The CD19FD681FO3F is electrically and mechanically equivalent to the CD19FD681FO3. All critical parameters including capacitance, tolerance, voltage rating, dielectric material, mounting type, lead spacing, and operating temperature range are identical. The parts are interchangeable in circuit design and PCB layout.

Q: What is the difference between these two part numbers?

A: The primary differences are compliance certifications. The CD19FD681FO3F is ROHS3 compliant and REACH unaffected, while the CD19FD681FO3 is RoHS non-compliant and REACH affected. Electrical and mechanical performance are identical.

Q: Will the CD19FD681FO3F fit the same PCB footprint as the CD19FD681FO3?

A: Yes. Both parts have identical physical dimensions, lead spacing (0.343" / 8.70 mm), and radial through-hole mounting configuration. No PCB redesign is required.

Q: Are there any temperature or voltage derating considerations when substituting?

A: No. Both parts operate across the same temperature range (-55°C to 125°C) and are rated for 500 V. Operating specifications are identical.

Q: Which part should be selected for new designs?

A: Selection should be based on regulatory compliance requirements. For applications requiring RoHS3 compliance or REACH compliance, the CD19FD681FO3F is the appropriate choice. For applications without these requirements, either part is suitable based on availability and procurement lead time.

Q: Are both parts currently in production?

A: Yes. Both the CD19FD681FO3 and CD19FD681FO3F are active products with current manufacturing status and adequate inventory levels.