FD-16AU Equivalent & Substitute Parts

Part Overview

The FD-16AU is a high-voltage ceramic disk capacitor manufactured by TDK Corporation, rated at 250 pF with a 13 kV voltage rating and Y5P temperature coefficient. This component is designed for general-purpose applications requiring high-voltage performance in a disk configuration with metal threaded fitting. The part is currently active in production with full inventory availability. Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting application requirements.

Substiute Parts

FD-16AU

TDK CorporationIn Stock: 1135FD-16AU Datasheet

Current PartRFQ

FD-22AU

TDK CorporationIn Stock: 1019FD-22AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD-16AU is determined by the following criteria:

Mandatory Matching Parameters:

• Capacitance value: 250 pF
• Tolerance: ±10%
• Temperature Coefficient: Y5P (B)
• Operating Temperature Range: -30°C to 85°C
• Package Type: Disk, Metal Fitting - Threaded
• Manufacturer: TDK Corporation
• RoHS Status: ROHS3 Compliant

Allowable Variation:

• Voltage Rating: Must equal or exceed 13000V (13 kV). Higher voltage ratings are acceptable as they provide additional safety margin without affecting circuit performance at the specified voltage level.

The FD-22AU qualifies as a direct substitute because it maintains all mandatory parameters while providing an elevated voltage rating of 20 kV, which exceeds the minimum 13 kV requirement.

Parameter Comparison

Engineering Selection Recommendations

The FD-22AU is a qualified substitute for the FD-16AU based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical capacitance (250 pF), tolerance (±10%), and temperature coefficient (Y5P). The elevated voltage rating of the FD-22AU (20 kV versus 13 kV) does not degrade circuit performance and provides additional voltage margin.

Regulatory Compliance: Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings (MSL 1 - Unlimited), ensuring equivalent environmental and handling requirements.

Product Status: Both parts are active in production with confirmed inventory availability, ensuring supply chain continuity.

Physical Considerations: The FD-22AU has larger physical dimensions (30.00mm × 33.00mm versus 26.00mm × 30.50mm). Mechanical fit within the application enclosure must be verified before implementation.

Frequently Asked Questions (FAQ)

Q: Can the FD-22AU be used in place of the FD-16AU? A: Yes. The FD-22AU is electrically and functionally equivalent to the FD-16AU for all specified parameters. The higher voltage rating (20 kV) does not affect performance at the 13 kV operating level and provides additional safety margin.

Q: What is the primary difference between these two parts? A: The voltage rating differs: FD-16AU is rated at 13 kV, while FD-22AU is rated at 20 kV. Physical dimensions also increase slightly in the FD-22AU due to the higher voltage rating.

Q: Are there any mounting compatibility issues? A: Both parts use identical package types (Disk, Metal Fitting - Threaded). However, the FD-22AU is physically larger. Verify that the mounting space and holder accommodate the increased dimensions (30.00mm diameter × 33.00mm length) before substitution.

Q: Do these parts have the same temperature performance? A: Yes. Both parts operate across the identical temperature range (-30°C to 85°C) and share the same Y5P temperature coefficient, ensuring equivalent thermal stability.

Q: Are regulatory certifications identical? A: Yes. Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, meeting identical environmental and regulatory requirements.

Q: What should be verified before substituting the FD-22AU? A: Confirm that the application circuit operates at or below 13 kV, verify physical mounting space accommodates the larger dimensions, and ensure the holder is compatible with the threaded metal fitting configuration.