FD-24AU Equivalent & Substitute Parts

Part Overview

The FD-24AU is a high-voltage ceramic disk capacitor manufactured by TDK Corporation, rated at 500 pF with a 20 kV working voltage. This component is designed for general-purpose applications requiring high-voltage performance in a disk configuration with metal threaded fittings. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining mechanical compatibility and regulatory compliance.

Substiute Parts

FD-24AU

TDK CorporationIn Stock: 855FD-24AU Datasheet

Current PartRFQ

FD-36AU

TDK CorporationIn Stock: 903FD-36AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The FD-36AU qualifies as a substitute for the FD-24AU based on the following substitution criteria:

Matching Parameters:

• Capacitance: 500 pF (identical)
• Tolerance: ±10% (identical)
• Temperature Coefficient: Y5P (B) (identical)
• Operating Temperature Range: -30°C to 85°C (identical)
• Package Type: Disk, Metal Fitting - Threaded (identical)
• Mounting Type: Requires Holder (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Series: FD (identical manufacturer series)

Exceeding Parameters:

• Voltage Rating: 25 kV (exceeds 20 kV requirement by 25%)

The FD-36AU maintains all critical electrical and mechanical specifications while providing enhanced voltage capability, making it suitable for applications where the original 20 kV rating is sufficient.

Parameter Comparison

Engineering Selection Recommendations

Both the FD-24AU and FD-36AU maintain Active product status with full ROHS3 compliance and identical moisture sensitivity ratings. The FD-36AU provides a higher voltage margin (25 kV versus 20 kV) while preserving all electrical and thermal characteristics. Selection between these parts depends on physical space constraints, as the FD-36AU has larger overall dimensions (48.00mm diameter and 39.00mm length compared to 40.00mm and 33.00mm respectively). Both parts are suitable for general-purpose high-voltage applications and maintain identical regulatory compliance profiles.

Frequently Asked Questions (FAQ)

Q: Can the FD-36AU be used in place of the FD-24AU? A: Yes. The FD-36AU meets all electrical specifications of the FD-24AU while exceeding the voltage rating. The primary consideration is physical space, as the FD-36AU is larger in both diameter and length.

Q: Are the capacitance and tolerance values identical between these parts? A: Yes. Both parts are rated at 500 pF with ±10% tolerance, ensuring equivalent electrical performance in circuit applications.

Q: Do both parts have the same temperature coefficient? A: Yes. Both parts use the Y5P (B) temperature coefficient with an operating range of -30°C to 85°C, providing identical thermal stability characteristics.

Q: What is the key difference between these parts? A: The primary difference is the voltage rating: FD-24AU is rated at 20 kV while FD-36AU is rated at 25 kV. The FD-36AU also has larger physical dimensions to accommodate the higher voltage rating.

Q: Are both parts RoHS compliant? A: Yes. Both the FD-24AU and FD-36AU are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Do these parts require special mounting considerations? A: Both parts require a holder for mounting. The larger dimensions of the FD-36AU must be accommodated in the mechanical design if substitution is planned.