P2103AC Equivalent & Substitute Parts

Part Overview

The P2103AC is a three-element SIDACtor® thyristor transient voltage suppressor manufactured by Littelfuse Inc., designed for transient overvoltage protection in electronic circuits. This component features a 170V off-state voltage rating with 400A peak pulse current capability in an industry-standard TO-220 Modified package configuration.

The P2103AC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component specification.

Substiute Parts

P2103AC

Littelfuse Inc.In Stock: 830P2103AC Datasheet

Current PartRFQ

P2103ACL

Littelfuse Inc.In Stock: 5485P2103ACL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P2103AC is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical):

• Voltage - Breakover: 250V
• Voltage - Off State: 170V
• Voltage - On State: 8V
• Current - Peak Pulse (8/20µs): 400A
• Current - Peak Pulse (10/1000µs): 100A
• Current - Hold (Ih): 150mA

Mechanical Parameters (Critical):

• Number of Elements: 3
• Package / Case: 3-SIP
• Supplier Device Package: TO-220 Modified
• Mounting Type: Through Hole

Functional Series:

• SIDACtor® series classification

Parts meeting all electrical and mechanical parameters listed above are classified as direct substitutes for the P2103AC.

Parameter Comparison

Engineering Selection Recommendations

The P2103ACL is a direct electrical and mechanical equivalent to the P2103AC. Both components share identical voltage ratings, current specifications, element count, and package configuration.

The primary distinction between these parts is product status and regulatory compliance. The P2103AC is classified as obsolete, while the P2103ACL maintains active product status with current manufacturing support. The P2103ACL achieves ROHS3 compliance, whereas the P2103AC is RoHS non-compliant. Both components maintain identical moisture sensitivity classification and export control designations.

For new designs or ongoing production requiring transient voltage suppression at 170V off-state with 400A peak pulse current in a three-element TO-220 Modified package, the P2103ACL is the appropriate selection. For legacy system maintenance where original P2103AC components are unavailable, the P2103ACL provides functional and mechanical compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the P2103ACL directly replace the P2103AC in existing designs?

A: Yes. The P2103ACL is electrically and mechanically equivalent to the P2103AC. All voltage ratings, current specifications, element configuration, and package dimensions are identical. Direct substitution is possible without circuit modification.

Q: What is the difference between P2103AC and P2103ACL?

A: The components are electrically identical. The P2103ACL is the active production variant with ROHS3 compliance, while the P2103AC is obsolete and RoHS non-compliant. The P2103ACL is recommended for all new applications and ongoing production.

Q: Are there any package or mounting differences?

A: No. Both the P2103AC and P2103ACL use the TO-220 Modified package in 3-SIP configuration with through-hole mounting. PCB layout and thermal management considerations remain unchanged.

Q: What electrical parameters must match for substitution?

A: Direct substitution requires matching of breakover voltage (250V), off-state voltage (170V), on-state voltage (8V), peak pulse current ratings (400A at 8/20µs and 100A at 10/1000µs), hold current (150mA), element count (3), and capacitance specifications (55pF, 85pF).

Q: Is the P2103ACL suitable for RoHS-compliant applications?

A: Yes. The P2103ACL is ROHS3 compliant and suitable for applications requiring RoHS certification. The P2103AC does not meet RoHS requirements.