P2103AA Equivalent & Substitute Parts

Part Overview

The P2103AA is a three-element SIDACtor® thyristor transient voltage suppressor manufactured by Littelfuse Inc., designed for overvoltage protection applications. It features a 170V off-state voltage rating with 150A peak pulse current capability in an industry-standard TO-220 Modified package. The P2103AA is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

P2103AA

Littelfuse Inc.In Stock: 2000P2103AA Datasheet

Current PartRFQ

P2103AAL

Littelfuse Inc.In Stock: 5399P2103AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P2103AA is determined by strict equivalence across electrical and mechanical parameters. The primary substitute, P2103AAL, maintains identical electrical specifications including breakover voltage (250V), off-state voltage (170V), on-state voltage (8V), and peak pulse current ratings (150A at 8/20µs and 45A at 10/1000µs). Both parts feature three elements with matching capacitance values (25pF, 35pF) and are housed in the same 3-SIP TO-220 Modified package for through-hole mounting.

The substitution is valid based on the following criteria:

• Identical voltage ratings (breakover, off-state, on-state)
• Identical current ratings (peak pulse and hold current)
• Identical element count and capacitance specifications
• Identical package and mounting configuration
• Identical ECCN and HTSUS classifications

Parameter Comparison

Engineering Selection Recommendations

The P2103AAL is the direct equivalent substitute for the obsolete P2103AA. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications. The P2103AAL is classified as Active product status, ensuring continued availability and supply chain support.

The P2103AAL offers improved compliance status compared to the P2103AA. While the P2103AA is RoHS non-compliant, the P2103AAL is ROHS3 compliant and REACH unaffected, making it suitable for applications subject to environmental and regulatory requirements. For new designs or system replacements, the P2103AAL is the recommended selection due to its active product status and enhanced compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can P2103AAL directly replace P2103AA in existing applications? A: Yes. The P2103AAL is electrically and mechanically identical to the P2103AA. All voltage ratings, current specifications, element count, capacitance values, and package configurations are equivalent. Direct substitution is valid without circuit modification.

Q: What is the difference between P2103AA and P2103AAL? A: The primary differences are product status and compliance certifications. The P2103AA is obsolete and RoHS non-compliant. The P2103AAL is active product status, ROHS3 compliant, and REACH unaffected. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts? A: No. Both P2103AA and P2103AAL use the same 3-SIP TO-220 Modified package for through-hole mounting. PCB layout and thermal management considerations remain unchanged.

Q: Why is the P2103AA obsolete? A: The P2103AA has been superseded by the P2103AAL, which maintains identical performance while offering improved compliance status and active product support.

Q: What certifications apply to the P2103AAL? A: The P2103AAL is ROHS3 compliant and REACH unaffected. Both parts carry EAR99 ECCN and 8541.30.0080 HTSUS classifications.