P6SMB440A-E Equivalent & Substitute Parts

Part Overview

The P6SMB440A-E is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This unidirectional Zener diode operates with a reverse standoff voltage of 376V and provides clamping at 602V maximum, with a peak pulse current rating of 1A. The component is packaged in DO-214AA (SMB) surface mount configuration.

The P6SMB440A-E is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

P6SMB440A-E

Littelfuse Inc.In Stock: 1206P6SMB440A-E Datasheet

Current PartRFQ

P6SMB440A

Eaton - Electronics DivisionIn Stock: 20427P6SMB440A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB440A-E is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 376V
• Voltage - Breakdown (Min): 418V
• Voltage - Clamping (Max) @ Ipp: 602V
• Current - Peak Pulse (10/1000µs): 1A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

The substitute part P6SMB440A, manufactured by Eaton - Electronics Division, matches all critical electrical parameters and maintains the same surface mount SMB package configuration. This part is classified as active and is available in higher inventory quantities.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB440A manufactured by Eaton - Electronics Division is a direct electrical and mechanical substitute for the obsolete P6SMB440A-E. All critical voltage, current, and power parameters are identical. Both components utilize the same DO-214AA SMB surface mount package, ensuring PCB layout compatibility without modification.

The Eaton P6SMB440A is classified as active with significantly higher inventory availability (20,400 pcs in stock versus 1,127 pcs for the Littelfuse variant). The operating temperature range of the Eaton part (-55°C ~ 150°C) is narrower at the lower bound compared to the Littelfuse part (-65°C ~ 150°C); this difference is relevant only for applications requiring operation below -55°C.

The Eaton part is RoHS non-compliant, whereas compliance status for the Littelfuse part is not specified in the provided data.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB440A (Eaton) be used as a direct replacement for the P6SMB440A-E (Littelfuse)?

A: Yes. Both parts share identical electrical specifications for voltage standoff, breakdown, clamping, peak pulse current, and power dissipation. The surface mount SMB package is identical, allowing direct PCB substitution without layout changes.

Q: What is the difference in operating temperature range between these parts?

A: The Littelfuse P6SMB440A-E operates from -65°C to 150°C, while the Eaton P6SMB440A operates from -55°C to 150°C. The Eaton part has a higher minimum operating temperature. For applications requiring operation below -55°C, the Littelfuse specification must be maintained.

Q: Are there any compliance differences between these parts?

A: The Eaton P6SMB440A is documented as RoHS non-compliant. RoHS compliance status for the Littelfuse P6SMB440A-E is not specified in the provided data. Compliance requirements should be verified against your application and regional regulations.

Q: Why is the Littelfuse part listed as obsolete?

A: Product obsolescence is determined by the manufacturer and typically reflects discontinuation of production. The Eaton equivalent remains in active production with higher inventory availability.

Q: Are the packaging options different between these parts?

A: The Littelfuse part is supplied in standard packaging (not specified). The Eaton part is supplied in Tape & Reel (TR) format. Both use the same DO-214AA SMB package case. Verify packaging requirements for your procurement and assembly processes.