LCE22 Equivalent & Substitute Parts

Part Overview

The LCE22 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. With a 22V reverse standoff voltage and 37.28V maximum clamping voltage at peak pulse current, the LCE22 provides transient suppression in through-hole DO-201 packaging. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

LCE22

Littelfuse Inc.In Stock: 739LCE22 Datasheet

Current PartRFQ

LCE22A

Littelfuse Inc.In Stock: 1040LCE22A Datasheet

DirectRFQ

5KP22E3/TR13

Microchip TechnologyIn Stock: 7695KP22E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE22 is determined by the following critical parameters:

• Voltage - Reverse Standoff: 22V (primary selection criterion)
• Voltage - Clamping (Max) @ Ipp: Must remain within acceptable circuit tolerance
• Current - Peak Pulse (10/1000µs): Minimum 42A required
• Operating Temperature Range: -55°C to 175°C
• Mounting Type: Through Hole
• Package Compatibility: DO-201 or equivalent axial packages

The identified substitute parts maintain the 22V reverse standoff voltage and support the required peak pulse current specifications. Variations in clamping voltage and peak pulse power ratings reflect different package geometries and thermal capabilities within the through-hole TVS diode category.

Parameter Comparison

Engineering Selection Recommendations

LCE22A is the direct equivalent substitute from Littelfuse Inc., maintaining identical electrical specifications (22V standoff, 42A peak pulse current, 1500W peak power) while offering active product status and improved availability. This part is recommended as the primary replacement for obsolete LCE22 applications requiring DO-201 packaging.

5KP22E3/TR13 from Microchip Technology is a manufacturer-recommended substitute that provides enhanced performance characteristics. This part maintains the 22V standoff voltage but offers increased peak pulse current (127A) and peak pulse power (5000W) in P600 through-hole packaging. Selection of this part is appropriate for applications requiring higher transient energy absorption or where P600 package dimensions are compatible with circuit board layout.

Both substitute parts are ROHS3 compliant and operate across the same temperature range as the original LCE22, ensuring regulatory and thermal compatibility in replacement scenarios.

Frequently Asked Questions (FAQ)

Q: Can LCE22A be used as a direct replacement for LCE22?

A: Yes. LCE22A maintains identical reverse standoff voltage (22V), peak pulse current (42A), and peak pulse power (1500W) specifications. Both parts use DO-201 through-hole packaging. The primary difference is product status: LCE22A is active while LCE22 is obsolete.

Q: What is the difference between LCE22A and 5KP22E3/TR13?

A: Both parts share the 22V reverse standoff voltage. The 5KP22E3/TR13 provides higher peak pulse current (127A versus 42A) and peak pulse power (5000W versus 1500W) due to its larger P600 package geometry. Clamping voltage also differs: 35.5V for LCE22A versus 39.4V for 5KP22E3/TR13. Selection depends on circuit transient energy requirements and available board space.

Q: Are package dimensions interchangeable between DO-201 and P600?

A: Both are through-hole axial packages but with different physical dimensions. DO-201 and P600 packages have different lead spacing and body lengths. Verify board layout compatibility before substituting between these package types.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. LCE22A and 5KP22E3/TR13 are both ROHS3 compliant with MSL rating of 1 (Unlimited). All parts operate across -55°C to 175°C junction temperature range.

Q: Which substitute should be selected for new designs?

A: For applications matching the original 42A peak pulse current specification, LCE22A is the appropriate choice. For applications requiring higher transient energy absorption, 5KP22E3/TR13 provides enhanced performance. Verify package compatibility with circuit board layout in both cases.