NP1800SCMCT3G Equivalent & Substitute Parts

Part Overview

The NP1800SCMCT3G is a Transient Voltage Suppressor (TVS) thyristor manufactured by onsemi, designed for overvoltage protection in surface mount applications. This component features a 170V off-state voltage rating with 400A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

NP1800SCMCT3G

onsemiIn Stock: 10172NP1800SCMCT3G Datasheet

Current PartRFQ

P1800SCLRP

Littelfuse Inc.In Stock: 41745P1800SCLRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P1800SCLRP from Littelfuse Inc. qualifies as a direct substitute for the NP1800SCMCT3G based on matching electrical and mechanical specifications. Substitution is determined by the following critical parameters:

• Voltage - Off State: 170V (identical)
• Voltage - Breakover: 220V (identical)
• Voltage - On State: 4V (identical)
• Current - Peak Pulse (8/20µs): 400A (identical)
• Current - Peak Pulse (10/1000µs): 100A (identical)
• Current - Hold (Ih): 150mA (identical)
• Package / Case: DO-214AA, SMB (identical)
• Mounting Type: Surface Mount (identical)
• Number of Elements: 1 (identical)

These parameters define the functional equivalence required for direct substitution in TVS thyristor applications.

Parameter Comparison

Engineering Selection Recommendations

The P1800SCLRP is the recommended substitute for the obsolete NP1800SCMCT3G. Both components share identical electrical ratings and mechanical specifications, ensuring functional compatibility in existing circuit designs. The P1800SCLRP maintains active product status with current manufacturing availability, eliminating supply chain risk associated with the obsolete onsemi part. The Littelfuse component carries ROHS3 compliance certification, meeting modern regulatory requirements. Both parts maintain MSL 1 (Unlimited) moisture sensitivity ratings, indicating equivalent handling and storage requirements. The identical DO-214AA package and surface mount configuration allow direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the P1800SCLRP directly replace the NP1800SCMCT3G without circuit modification?

A: Yes. Both components share identical voltage ratings (170V off-state, 220V breakover, 4V on-state), current specifications (400A peak pulse at 8/20µs, 100A at 10/1000µs, 150mA hold current), and package configuration (DO-214AA, SMB). Direct PCB substitution is possible without design changes.

Q: What is the difference in capacitance between these parts?

A: The NP1800SCMCT3G specifies 33pF capacitance, while the P1800SCLRP specifies 90pF. Both values fall within acceptable ranges for TVS thyristor applications and do not prevent substitution based on the provided electrical parameters.

Q: Are there packaging differences between these components?

A: Both components use the DO-214AA (SMB) surface mount package. The NP1800SCMCT3G packaging is not specified in detail, while the P1800SCLRP is supplied in Tape & Reel (TR) format. This represents a handling and delivery difference only, with no impact on component functionality or PCB compatibility.

Q: Why is the NP1800SCMCT3G listed as obsolete?

A: The NP1800SCMCT3G has reached end-of-life status with onsemi. The P1800SCLRP from Littelfuse remains in active production, providing continued availability and support for this functional specification.

Q: Are there compliance differences between these parts?

A: The P1800SCLRP carries ROHS3 compliance certification. Both components are REACH Unaffected and carry EAR99 ECCN classification. The P1800SCLRP's active status ensures ongoing compliance with current regulatory standards.