1206J1K50331MXT Equivalent & Substitute Parts

Part Overview

The 1206J1K50331MXT is a 330 pF ceramic capacitor manufactured by Knowles Syfer, rated for 1500V (1.5kV) with X7R temperature coefficient in 1206 (3216 Metric) surface mount package. This component is designed for general purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is currently active and in stock with 795 units available. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter constraints.

Substiute Parts

1206J1K50331MXT

Knowles SyferIn Stock: 8431206J1K50331MXT Datasheet

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KGM31AR73D331KU

KYOCERA AVXIn Stock: 12998KGM31AR73D331KU Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1206J1K50331MXT is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 330 pF
• Temperature coefficient: X7R
• Package designation: 1206 (3216 Metric)
• Mounting type: Surface Mount, MLCC
• Operating temperature range: -55°C to 125°C minimum
• RoHS3 compliance status

Allowable Variation Parameters:

• Voltage rating: Equal to or greater than 1500V
• Tolerance: Equal to or tighter than ±20%
• Physical dimensions: Within mechanical compatibility limits for 1206 package

The substitute part KGM31AR73D331KU from KYOCERA AVX meets all mandatory matching criteria and provides enhanced voltage rating (2000V) with improved tolerance (±10%), making it suitable for applications where the original part is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 1206J1K50331MXT and KGM31AR73D331KU are active products with ROHS3 compliance and REACH unaffected status, suitable for current design implementations. The KGM31AR73D331KU offers a higher voltage rating (2000V versus 1500V) and tighter tolerance (±10% versus ±20%), providing enhanced performance margins in high-voltage applications. Selection between these parts should be based on circuit voltage requirements, tolerance specifications, and supply chain availability. Both components maintain identical operating temperature ranges and package footprints, ensuring mechanical and thermal compatibility in 1206 surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can KGM31AR73D331KU be used as a direct replacement for 1206J1K50331MXT?

A: Yes. Both parts share identical capacitance (330 pF), temperature coefficient (X7R), package designation (1206), and operating temperature range (-55°C to 125°C). The substitute part provides higher voltage rating and tighter tolerance, making it functionally compatible for applications designed around the original specification.

Q: What are the physical dimension differences between these parts?

A: The 1206J1K50331MXT measures 0.126" L × 0.063" W × 0.063" thickness. The KGM31AR73D331KU measures 0.130" L × 0.063" W × 0.071" thickness. Both fit the 1206 (3216 Metric) package classification and are compatible with standard 1206 PCB footprints.

Q: Does the improved tolerance of KGM31AR73D331KU affect circuit performance?

A: The ±10% tolerance of the substitute part is tighter than the ±20% tolerance of the original part. This provides improved capacitance accuracy and consistency, which may enhance circuit performance in applications sensitive to capacitance variation.

Q: Are both parts suitable for high-voltage applications?

A: The 1206J1K50331MXT is rated for 1500V operation. The KGM31AR73D331KU is rated for 2000V operation. Selection depends on the circuit voltage requirements. The higher-rated substitute provides additional safety margin in high-voltage designs.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.