SMCJ220C Equivalent & Substitute Parts

Part Overview

The SMCJ220C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 220V reverse standoff voltage with a maximum clamping voltage of 373.8V at peak pulse current. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

SMCJ220C

Littelfuse Inc.In Stock: 738SMCJ220C Datasheet

Current PartRFQ

SMCJ220CA

MeritekIn Stock: 3151SMCJ220CA Datasheet

DirectRFQ

SMCJ220CA

MeritekIn Stock: 3151SMCJ220CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMCJ220C is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 220V and breakdown voltage minimum of 233.1V establish the primary protection threshold
• Peak Pulse Current: 4.2A at 10/1000µs pulse duration defines the transient energy handling capability
• Clamping Voltage: Maximum clamping voltage of 373.8V at peak pulse current determines the maximum voltage presented to protected circuitry
• Package Compatibility: DO-214AB (SMC) surface-mount package ensures mechanical and electrical compatibility with existing PCB layouts
• Thermal Range: Operating temperature range of -55°C to 150°C must be maintained for reliable operation across environmental conditions

The SMCJ220CA from Meritek meets these substitution criteria while maintaining functional equivalence for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

The SMCJ220CA from Meritek is a direct functional equivalent for the obsolete SMCJ220C. Both components share identical reverse standoff voltage, peak pulse current rating, power dissipation capability, package form factor, and thermal operating range. The SMCJ220CA demonstrates lower breakdown voltage (246V minimum versus 233.1V) and lower clamping voltage (356V maximum versus 373.8V), both of which represent improved performance characteristics for overvoltage suppression.

Both parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices. The SMCJ220CA is currently in active production status with substantial inventory availability, providing supply chain continuity for new designs and legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the SMCJ220CA directly replace the SMCJ220C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (220V), peak pulse current (4.2A), power rating (1500W), package type (DO-214AB/SMC), and operating temperature range (-55°C to 150°C). The SMCJ220CA exhibits lower clamping voltage, which provides enhanced protection performance.

Q: What is the significance of the clamping voltage difference between these parts?

A: The SMCJ220C clamps at a maximum of 373.8V, while the SMCJ220CA clamps at 356V. Lower clamping voltage reduces the peak voltage stress on protected circuitry during transient events, representing an improvement in protection characteristics.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant and carry MSL Level 1 moisture sensitivity rating. The SMCJ220CA includes REACH Unaffected status. No compliance barriers exist for substitution.

Q: Does the package form factor remain identical?

A: Yes. Both the SMCJ220C and SMCJ220CA use the DO-214AB (SMC) surface-mount package, ensuring direct PCB compatibility without layout modifications.

Q: What is the availability status of each part?

A: The SMCJ220C is obsolete with limited remaining inventory (707 pieces). The SMCJ220CA is in active production with substantial availability (3100 pieces), providing reliable long-term supply for new designs and production runs.