AJ14 Trimmer Capacitor Equivalent & Substitute Parts

Part Overview

The AJ14 is a 1–14pF trimmer capacitor manufactured by Knowles Voltronics, designed for side adjustment through-hole applications. This air-dielectric component operates at 125V rated voltage with a Q factor of 3000 @ 100MHz, suitable for general-purpose tuning and calibration circuits across the temperature range of –65°C to 125°C. The part is currently active in production with 834 units in stock. Substitute parts are identified when inventory constraints, lead time requirements, or specific compliance certifications necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

AJ14

Knowles VoltronicsIn Stock: 872AJ14 Datasheet

Current PartRFQ

AP14

Knowles VoltronicsIn Stock: 2118AP14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The AP14 is classified as a parametric equivalent to the AJ14 based on the following criteria:

Electrical Parameters (Identical):

• Capacitance range: 1–14pF
• Rated voltage: 125V
• Dielectric material: Air
• Q factor: 3000 @ 100MHz

Mechanical Parameters (Identical):

• Adjustment type: Side
• Mounting type: Through Hole
• Physical dimensions: 0.300" Dia (7.62mm)
• Maximum seated height: 0.500" (12.70mm)

Environmental Parameters (Identical):

• Operating temperature range: –65°C to 125°C
• Moisture sensitivity level: Not applicable
• REACH status: REACH Unaffected
• ECCN classification: EAR99

The AP14 maintains full electrical and mechanical compatibility with the AJ14, enabling direct substitution in circuit applications where the specified parameters are required.

Parameter Comparison

Engineering Selection Recommendations

Both the AJ14 and AP14 are active production parts from Knowles Voltronics with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements and inventory availability:

AJ14 Selection Criteria:

• Applications requiring RoHS3 compliance
• Designs subject to RoHS-regulated supply chains
• Inventory availability of 834 units

AP14 Selection Criteria:

• Applications without RoHS compliance mandates
• Higher inventory availability (2025 units) for volume requirements
• Identical electrical performance and mechanical fit

Both parts share the same REACH status (REACH Unaffected) and ECCN classification (EAR99), ensuring equivalent regulatory treatment in export and supply chain contexts.

Frequently Asked Questions (FAQ)

Q: Can AP14 be used as a direct replacement for AJ14 in all applications?

A: Yes, the AP14 provides direct electrical and mechanical substitution. The primary difference is RoHS compliance status. Applications not subject to RoHS requirements can use AP14 without functional impact.

Q: What is the difference between AJ14 and AP14?

A: Both parts are identical in capacitance range (1–14pF), voltage rating (125V), adjustment type (side), mounting configuration (through hole), physical dimensions (0.300" Dia × 0.500" Max Height), and operating temperature range (–65°C to 125°C). The AJ14 is RoHS3 compliant, while the AP14 is RoHS non-compliant. The AP14 has higher inventory availability (2025 units vs. 834 units).

Q: Are there any performance differences between AJ14 and AP14?

A: No. Both parts deliver identical Q factor (3000 @ 100MHz), dielectric material (air), and electrical characteristics across the specified operating temperature range.

Q: Which part should I select for a new design?

A: Selection depends on regulatory requirements. If RoHS3 compliance is mandatory, use AJ14. If RoHS compliance is not required and higher inventory availability is beneficial, AP14 is suitable.

Q: Are both parts suitable for through-hole PCB assembly?

A: Yes. Both AJ14 and AP14 are through-hole mounted components with identical footprint dimensions (0.300" Dia, 0.500" Max Height), ensuring compatibility with standard PCB layouts and assembly processes.