1210J1K20331MXT Equivalent & Substitute Parts

Part Overview

The 1210J1K20331MXT is a 330 pF ceramic capacitor manufactured by Knowles Syfer, rated for 1200V (1.2kV) operation with X7R temperature coefficient characteristics. This component is designed for general-purpose applications requiring high-voltage ceramic capacitance in a compact surface-mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent capacitance, voltage rating, package dimensions, and mounting compatibility can be maintained within specified tolerance and temperature coefficient parameters.

Substiute Parts

1210J1K20331MXT

Knowles SyferIn Stock: 9971210J1K20331MXT Datasheet

Current PartRFQ

C1210C331JGGAC7800

KEMETIn Stock: 8046C1210C331JGGAC7800 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1210J1K20331MXT is determined by the following critical parameters:

• Capacitance Value: Must be 330 pF to maintain circuit function
• Package Dimensions: Must be 1210 (3225 Metric) for PCB layout compatibility
• Mounting Type: Must be Surface Mount, MLCC for assembly process compatibility
• Operating Temperature Range: Must support -55°C ~ 125°C minimum
• Voltage Rating: Must meet or exceed 1200V (1.2kV) to ensure safe operation
• RoHS Compliance: Must maintain ROHS3 Compliant status for regulatory requirements
• Moisture Sensitivity: Must be MSL 1 or equivalent for storage and handling

The substitute part C1210C331JGGAC7800 meets all critical substitution criteria. While it features a tighter tolerance (±5% versus ±20%) and higher voltage rating (2000V versus 1200V), these represent performance improvements that do not compromise circuit compatibility. The C0G/NP0 temperature coefficient differs from the X7R specification but remains within the same operating temperature range and maintains equivalent functional performance for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 1210J1K20331MXT and C1210C331JGGAC7800 maintain Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating. The substitute part provides enhanced performance characteristics: improved capacitance tolerance (±5% versus ±20%) and elevated voltage rating (2000V versus 1200V). Both components support the identical operating temperature range of -55°C ~ 125°C and maintain identical PCB footprint compatibility within the 1210 (3225 Metric) package.

The primary consideration is the thickness differential: the KEMET substitute measures 0.091" (2.30mm) maximum thickness compared to 0.079" (2.00mm) for the Knowles Syfer original. This 0.012" (0.30mm) increase must be verified against PCB assembly clearance requirements and component stacking constraints in the target application.

Frequently Asked Questions (FAQ)

Q: Can C1210C331JGGAC7800 be used as a direct replacement for 1210J1K20331MXT?

A: Yes, provided PCB assembly clearance accommodates the 0.30mm thickness increase. Both parts share identical capacitance (330 pF), package footprint (1210/3225 Metric), mounting type (Surface Mount MLCC), operating temperature range (-55°C ~ 125°C), and compliance certifications (ROHS3, MSL 1).

Q: What is the significance of the temperature coefficient difference (X7R versus C0G/NP0)?

A: Both temperature coefficients support the -55°C ~ 125°C operating range. X7R permits ±15% capacitance variation across temperature; C0G/NP0 provides superior stability with minimal variation. For general-purpose applications, both coefficients are functionally equivalent.

Q: Does the higher voltage rating (2000V versus 1200V) affect circuit compatibility?

A: No. Higher voltage rating represents a performance enhancement that does not compromise circuit function. The substitute part safely operates at the original circuit's 1200V specification with additional safety margin.

Q: Are there any PCB layout considerations for substitution?

A: The 0.30mm thickness increase (0.091" versus 0.079" maximum) requires verification of vertical clearance. Confirm no component interference or assembly constraints exist in the target PCB design before substitution.

Q: Do both parts require identical reflow soldering profiles?

A: Both components are Surface Mount MLCCs with MSL 1 rating. Standard reflow profiles for ceramic capacitors apply to both parts. Verify specific reflow parameters with assembly process documentation.