UHV-8A Equivalent & Substitute Parts

Part Overview

The UHV-8A is a 1300 pF ceramic disk capacitor rated for 40 kV operation, manufactured by TDK Corporation. This high-voltage component is designed for general-purpose applications requiring stable capacitance and low dissipation factor across its operating temperature range of -30°C to 85°C. The part is currently active in production with ROHS3 compliance and maintains consistent availability. Substitute parts are identified based on matching capacitance value, tolerance, physical dimensions, mounting requirements, and compliance certifications while allowing for rated voltage upgrades.

Substiute Parts

UHV-8A

TDK CorporationIn Stock: 1046UHV-8A Datasheet

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FHV-11AN

TDK CorporationIn Stock: 1111FHV-11AN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UHV-8A is determined by the following criteria:

Mandatory Matching Parameters:

• Capacitance value: 1300 pF
• Tolerance: ±10%
• Physical dimensions: 1.890" Dia x 1.299" L (48.00 mm x 33.00 mm)
• Package type: Disk, Metal Fitting - Threaded
• Mounting requirement: Requires Holder
• Operating temperature range: -30°C to 85°C minimum
• Compliance: ROHS3 Compliant

Allowable Variation:

• Rated voltage may be equal to or greater than 40 kV
• Temperature coefficient may differ (Z5T or Y5S acceptable)
• Manufacturer may vary (TDK Corporation maintained in this list)

The FHV-11AN qualifies as a substitute because it maintains all mandatory parameters while providing an upgraded voltage rating of 50 kV, offering enhanced margin for high-voltage applications.

Parameter Comparison

Engineering Selection Recommendations

Both the UHV-8A and FHV-11AN are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The FHV-11AN provides a 10 kV voltage rating advantage (50 kV versus 40 kV) while maintaining identical capacitance, tolerance, physical dimensions, and mounting characteristics. Selection between these parts depends on circuit voltage requirements: the UHV-8A is suitable for 40 kV rated applications, while the FHV-11AN accommodates applications requiring 50 kV rated operation or those benefiting from additional voltage margin. Both parts are manufactured by TDK Corporation and maintain equivalent availability.

Frequently Asked Questions (FAQ)

Q: Can FHV-11AN replace UHV-8A in a 40 kV circuit? A: Yes. The FHV-11AN is rated for 50 kV operation, which exceeds the 40 kV requirement. The identical capacitance (1300 pF), tolerance (±10%), physical dimensions, and mounting type ensure direct compatibility.

Q: Are the physical dimensions identical between UHV-8A and FHV-11AN? A: Yes. Both parts measure 1.890" diameter x 1.299" length (48.00 mm x 33.00 mm) and use identical disk packaging with metal threaded fittings.

Q: What is the difference between Z5T and Y5S temperature coefficients? A: Both temperature coefficients are acceptable for this substitution category. The Z5T (UHV-8A) and Y5S (FHV-11AN) represent different ceramic formulations, both supporting the -30°C to 85°C operating range specified for this application.

Q: Do both parts require the same mounting holder? A: Yes. Both the UHV-8A and FHV-11AN require a holder for mounting and use identical threaded metal fittings, ensuring mechanical compatibility in existing installations.

Q: Are there compliance differences between UHV-8A and FHV-11AN? A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, meeting identical regulatory requirements.