P1806UBRP Equivalent & Substitute Parts

Part Overview

The P1806UBRP is a 150V off-state TVS thyristor from Littelfuse Inc.'s SIDACtor® series, designed for transient voltage suppression applications. This 6-SMD gull wing package device provides 250 A peak pulse current capability with a 210V breakover voltage. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing system support and procurement planning.

Substiute Parts

P1806UBRP

Littelfuse Inc.In Stock: 900P1806UBRP Datasheet

Current PartRFQ

P1806UBLRP

Littelfuse Inc.In Stock: 1207P1806UBLRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1806UBRP is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage ratings: Breakover voltage (210V), off-state voltage (150V), and on-state voltage (8V) must match exactly
• Current specifications: Peak pulse current at 8/20µs (250A) and 10/1000µs (80A) must be identical
• Hold current (Ih): 150mA requirement must be maintained
• Element count: 6 elements required
• Capacitance range: 30pF to 40pF
• Package configuration: 6-SMD gull wing surface mount only
• Supplier device package: Modified MS-013

The P1806UBLRP meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The P1806UBLRP is the direct substitute for the obsolete P1806UBRP. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all critical parameters.

The P1806UBLRP offers additional advantages for new procurement:

• Active product status ensures continued availability and manufacturer support
• ROHS3 compliance meets current environmental regulations
• Tape & Reel packaging is standard for automated assembly processes
• Identical performance characteristics guarantee drop-in compatibility in existing designs

For applications requiring the P1806UBRP, transition to P1806UBLRP without design modification.

Frequently Asked Questions (FAQ)

Q: Can P1806UBLRP replace P1806UBRP in existing designs?

A: Yes. The P1806UBLRP is electrically and mechanically identical to the P1806UBRP across all specified parameters. No circuit or layout changes are required.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging (P1806UBRP) is suitable for manual assembly or small-volume applications. Tape & Reel packaging (P1806UBLRP) is standard for automated pick-and-place assembly and high-volume production. The components themselves are identical.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS3 compliance of the P1806UBLRP is a manufacturing and environmental advantage. It does not alter electrical performance or mechanical fit. The part is fully compatible with designs originally using the non-compliant P1806UBRP.

Q: Are there any other substitutes for the P1806UBRP?

A: Based on the provided specifications, the P1806UBLRP is the only direct substitute that meets all electrical and mechanical requirements for this 150V, 250A TVS thyristor in 6-SMD gull wing configuration.

Q: What should I consider when transitioning from P1806UBRP to P1806UBLRP?

A: Verify that your assembly process supports Tape & Reel packaging. Confirm that your procurement system can source the active P1806UBLRP. No technical validation is required due to complete parameter equivalence.