P0644UARP Equivalent & Substitute Parts

Part Overview

The P0644UARP is a SIDACtor® Transient Voltage Suppressor (TVS) thyristor designed for overvoltage protection in electronic circuits. This component features dual-channel protection with 58V/116V off-state voltage ratings and 150A peak pulse current capability in a 6-SMD gull wing surface mount package.

The P0644UARP is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

P0644UARP

Littelfuse Inc.In Stock: 998P0644UARP Datasheet

Current PartRFQ

P0644UALRP

Littelfuse Inc.In Stock: 835P0644UALRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P0644UARP is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Must Match):

• Voltage - Breakover: 77V, 154V
• Voltage - Off State: 58V, 116V
• Voltage - On State: 4 V
• Current - Peak Pulse (8/20µs): 150 A
• Current - Peak Pulse (10/1000µs): 45 A
• Current - Hold (Ih): 150 mA
• Number of Elements: 4
• Capacitance: 35pF, 60pF

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: 6-SMD, Gull Wing
• Supplier Device Package: Modified MS-013

The P0644UALRP meets all electrical and mechanical equivalence criteria and is classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The P0644UALRP is the direct electrical and mechanical equivalent of the P0644UARP. Both components share identical electrical specifications and package configuration.

The primary distinction between these parts is product status and regulatory compliance. The P0644UARP is obsolete, while the P0644UALRP maintains active production status. The P0644UALRP is ROHS3 compliant and REACH unaffected, whereas the P0644UARP is RoHS non-compliant.

For new designs or ongoing production requiring this component specification, the P0644UALRP is the appropriate selection. The packaging difference (tape & reel for P0644UALRP versus unspecified for P0644UARP) reflects standard distribution formats and does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the P0644UALRP directly replace the P0644UARP in existing designs?

A: Yes. The P0644UALRP is electrically and mechanically equivalent to the P0644UARP. All voltage ratings, current specifications, element count, capacitance values, and package configuration are identical.

Q: What is the difference between these two part numbers?

A: The P0644UALRP is the active production equivalent of the obsolete P0644UARP. The P0644UALRP is ROHS3 compliant and REACH unaffected, while the P0644UARP is RoHS non-compliant. The P0644UALRP is supplied in tape & reel packaging format.

Q: Are there any compatibility concerns with the 6-SMD gull wing package?

A: No. Both parts use the Modified MS-013 supplier device package in 6-SMD gull wing configuration. PCB footprints and assembly processes are identical.

Q: Does the tape & reel packaging of the P0644UALRP affect circuit performance?

A: No. Packaging format is a distribution and handling specification only. It does not affect electrical performance, thermal characteristics, or reliability of the component.

Q: What is the moisture sensitivity level for these components?

A: Both the P0644UARP and P0644UALRP have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.