Littelfuse P3203AA Equivalent & Substitute Parts

Part Overview

The Littelfuse P3203AA is a three-element SIDACtor® thyristor transient voltage suppressor rated for 270V off-state operation with 150A peak pulse current capability in a TO-220 Modified package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The P3203AAL serves as the direct functional equivalent with identical electrical specifications and improved product status.

Substiute Parts

P3203AA

Littelfuse Inc.In Stock: 1684P3203AA Datasheet

Current PartRFQ

P3203AAL

Littelfuse Inc.In Stock: 90314P3203AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P3203AAL qualifies as a direct substitute for the P3203AA based on strict parameter equivalence across all electrical and mechanical specifications. Substitution is valid when the following criteria are met:

• Voltage ratings (breakover, off-state, and on-state) are identical
• Peak pulse current ratings for both 8/20µs and 10/1000µs waveforms match exactly
• Hold current (Ih) specification is identical
• Number of elements (3) is unchanged
• Capacitance range (20pF, 30pF) is identical
• Package configuration (3-SIP / TO-220 Modified) and mounting type (Through Hole) are identical
• Series designation (SIDACtor®) remains consistent

Parameter Comparison

Engineering Selection Recommendations

The P3203AAL is the appropriate selection for new designs and replacement applications. All electrical parameters and mechanical specifications are identical to the P3203AA, ensuring direct functional compatibility. The P3203AAL carries Active product status, providing long-term availability and supply chain stability compared to the obsolete P3203AA. Additionally, the P3203AAL meets ROHS3 compliance requirements, whereas the P3203AA is non-compliant. For applications requiring RoHS compliance certification, the P3203AAL is the mandated choice.

Frequently Asked Questions (FAQ)

Q: Can the P3203AAL be used as a direct replacement for the P3203AA in existing designs?

A: Yes. All electrical specifications (voltage ratings, current ratings, hold current) and mechanical parameters (package type, mounting configuration, element count) are identical between the two parts. Direct substitution is valid without circuit modification.

Q: What is the primary difference between P3203AA and P3203AAL?

A: The P3203AA is obsolete with non-compliant RoHS status, while the P3203AAL is an active product meeting ROHS3 compliance. Electrical and mechanical specifications are unchanged.

Q: Are there any packaging differences between these parts?

A: No. Both parts use the 3-SIP / TO-220 Modified package configuration with through-hole mounting. PCB layout and thermal management considerations remain identical.

Q: Does the P3203AAL have the same capacitance specifications?

A: Yes. Both parts specify capacitance values of 20pF and 30pF. No adjustments to circuit design are required.

Q: Is the P3203AAL suitable for new product designs?

A: Yes. The P3203AAL is the recommended choice for new designs due to its active product status, ROHS3 compliance, and guaranteed long-term availability.