1206J1K00331MXT Ceramic Capacitor Equivalent & Substitute Parts

Part Overview

The 1206J1K00331MXT is a 330 pF ceramic capacitor rated at 1000V (1kV) with X7R temperature coefficient, manufactured by Knowles Syfer. This surface mount multilayer ceramic capacitor (MLCC) in 1206 package format is designed for general purpose applications requiring high voltage performance. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when design requirements allow for parameter flexibility within the same functional category, such as upgraded voltage ratings, improved tolerance specifications, or alternative temperature coefficient characteristics that maintain or exceed the original performance envelope.

Substiute Parts

1206J1K00331MXT

Knowles SyferIn Stock: 8231206J1K00331MXT Datasheet

Current PartRFQ

KGM31AR73D331KU

KYOCERA AVXIn Stock: 12998KGM31AR73D331KU Datasheet

UpgradeRFQ

C1206C331JDGAC7800

KEMETIn Stock: 19101C1206C331JDGAC7800 Datasheet

MFR RecommendedRFQ

CC1206JKNPOCBN331

YAGEOIn Stock: 1835CC1206JKNPOCBN331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1206J1K00331MXT is determined by the following mandatory parameters:

Core Compatibility Requirements:

• Capacitance value: 330 pF (exact match required)
• Package format: 1206 (3216 Metric) surface mount
• Operating temperature range: -55°C to 125°C minimum
• Mounting type: Surface Mount, MLCC
• RoHS3 compliance and MSL 1 rating

Allowable Parameter Variations:

• Voltage rating: Equal to or greater than 1000V
• Tolerance: Equal to or tighter than ±20%
• Temperature coefficient: X7R or C0G/NP0 (both acceptable for general purpose applications)
• Physical dimensions: Minor variations acceptable within standard 1206 envelope tolerances

The identified substitute parts meet these criteria through either direct equivalence (same specifications) or upgrade capability (improved electrical or tolerance characteristics).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Specifications): The 1206J1K00331MXT can be directly replaced with substitute parts maintaining identical voltage and tolerance specifications. Selection among equivalent parts should be based on inventory availability and supply chain considerations.

Upgrade Substitution: The KGM31AR73D331KU (KYOCERA AVX) provides a voltage upgrade to 2000V (2kV) while maintaining X7R temperature coefficient. This part is suitable for applications where higher voltage margin is required or beneficial for circuit reliability.

The C1206C331JDGAC7800 (KEMET) and CC1206JKNPOCBN331 (YAGEO) offer improved tolerance (±5% versus ±20%) with C0G/NP0 temperature coefficient, providing superior frequency and temperature stability characteristics. These parts are recommended for precision applications requiring tighter capacitance tolerance.

All substitute parts maintain full RoHS3 compliance, MSL 1 rating, and active production status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 1206J1K00331MXT be replaced with a higher voltage rated part? A: Yes. Parts rated at 2000V (2kV) or higher are direct substitutes, as they meet or exceed the original 1000V requirement. The KGM31AR73D331KU operates at 2000V and maintains all other critical parameters.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients? A: X7R provides ±15% capacitance variation across the -55°C to 125°C temperature range. C0G/NP0 provides superior stability with minimal capacitance change over temperature, suitable for precision applications. Both are acceptable for general purpose use.

Q: Are tolerance differences significant for substitution? A: Tolerance differences affect circuit performance in precision applications. The original ±20% tolerance can be replaced with ±10% or ±5% parts without functional degradation. Tighter tolerance parts provide improved circuit predictability.

Q: Do physical dimension variations affect PCB layout? A: All substitute parts use the 1206 (3216 Metric) package format with compatible footprints. Minor thickness variations (1.60mm to 1.80mm) are within standard PCB assembly tolerances and do not require layout modifications.

Q: Is inventory availability a consideration for substitution? A: Yes. Current inventory levels vary by manufacturer. The KGM31AR73D331KU has 12,924 units in stock, C1206C331JDGAC7800 has 19,071 units, and CC1206JKNPOCBN331 has 1,800 units available, compared to 739 units of the original part.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance for current and future applications.