ET10 Trimmer Capacitor Equivalent & Substitute Parts

Part Overview

The ET10 is a 0.8–10pF trimmer capacitor manufactured by Knowles Voltronics, designed for 250V panel mount applications with top adjustment. This component is classified as obsolete, making substitute identification essential for ongoing production and maintenance requirements. The ET10 operates across a wide temperature range (-65°C to 125°C) with sealed construction and air dielectric properties.

Substiute Parts

ET10

Knowles VoltronicsIn Stock: 1004ET10 Datasheet

Current PartRFQ

AT10

Knowles VoltronicsIn Stock: 1108AT10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ET10 is determined by the following critical parameters:

• Capacitance Range Compatibility: The substitute must cover the required capacitance window. The ET10 operates from 0.8–10pF; the AT10 operates from 1–10pF, providing overlap across the upper range.
• Voltage Rating: Both parts maintain 250V rated voltage, ensuring electrical safety margins are preserved.
• Dielectric Material: Both use air dielectric, maintaining frequency response and Q factor characteristics.
• Adjustment Type & Mounting: Both feature top adjustment and panel mount configuration, ensuring mechanical and operational compatibility.
• Physical Dimensions: Identical footprint (0.300" diameter, 0.480" maximum height) allows direct mechanical substitution.
• Temperature Range: Both support –65°C to 125°C operation, maintaining thermal performance across applications.
• Q Factor: Both deliver 5000 @ 100MHz, preserving RF performance characteristics.

The AT10 qualifies as a direct substitute where capacitance requirements fall within the 1–10pF range. Applications requiring capacitance below 1pF cannot use the AT10 as a substitute.

Parameter Comparison

Engineering Selection Recommendations

The AT10 is the qualified substitute for the ET10 based on the following factors:

• Product Status: The ET10 is obsolete; the AT10 is active and currently manufactured, ensuring long-term availability and supply chain continuity.
• Electrical Equivalence: Both parts share identical voltage rating, dielectric material, Q factor, and temperature range, confirming functional compatibility.
• Mechanical Compatibility: Identical physical dimensions and mounting configuration enable direct board-level substitution without redesign.
• Capacitance Range Consideration: The AT10 minimum capacitance of 1pF represents a 0.2pF offset from the ET10 minimum of 0.8pF. Applications requiring adjustment below 1pF cannot use the AT10.

Frequently Asked Questions (FAQ)

Q: Can the AT10 directly replace the ET10 in all applications?

A: The AT10 qualifies as a direct substitute for applications where the required capacitance adjustment range falls within 1–10pF. If your circuit requires tuning below 1pF, the AT10 cannot be used as a substitute.

Q: Are the physical dimensions identical between ET10 and AT10?

A: Yes. Both parts share a 0.300" diameter footprint and 0.480" maximum seated height, enabling direct mechanical substitution without PCB layout modifications.

Q: What is the significance of the ET10 being obsolete?

A: Obsolete status indicates the ET10 is no longer manufactured. The AT10, classified as active, represents the current production equivalent and ensures ongoing component availability.

Q: Do both parts operate across the same temperature range?

A: Yes. Both the ET10 and AT10 operate from –65°C to 125°C, maintaining thermal performance equivalence across industrial and extended temperature applications.

Q: Are there compliance or certification differences between these parts?

A: The AT10 is RoHS non-compliant and REACH unaffected. Both parts carry EAR99 ECCN classification and 8532.30.0090 HTSUS code. Compliance requirements for your application should be evaluated independently.