Equivalent & Substitute Parts for P4SMA150

Part Overview

The P4SMA150 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 128V reverse standoff voltage with a 217.35V maximum clamping voltage at peak pulse current, housed in a DO-214AC (SMA) surface mount package. The P4SMA150 is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

P4SMA150

Littelfuse Inc.In Stock: 774P4SMA150 Datasheet

Current PartRFQ

P4SMA150A

Eaton - Electronics DivisionIn Stock: 10393P4SMA150A Datasheet

MFR RecommendedRFQ

P4SMA150A

Eaton - Electronics DivisionIn Stock: 10393P4SMA150A Datasheet

MFR RecommendedRFQ

SMAJP4KE150A-TP

Micro Commercial CoIn Stock: 1115SMAJP4KE150A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA150 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 128V (all substitutes match)
• Current - Peak Pulse (10/1000µs): 2A (all substitutes match)
• Power - Peak Pulse: 400W (all substitutes match)
• Package / Case: DO-214AC, SMA (all substitutes match)
• Type: Zener, Unidirectional (all substitutes match)

The identified substitute parts P4SMA150A (Eaton - Electronics Division) and SMAJP4KE150A-TP (Micro Commercial Co) maintain electrical equivalence within the specified parameters. Both substitutes are classified as active products, providing procurement availability advantages over the obsolete P4SMA150. Clamping voltage variations (207V vs. 217.35V) fall within acceptable operational tolerances for transient suppression applications where the primary function is voltage limiting at the specified peak pulse current.

Parameter Comparison

Engineering Selection Recommendations

P4SMA150A (Eaton - Electronics Division) is the manufacturer-recommended substitute. This part maintains full electrical equivalence with the P4SMA150 across all critical parameters and is actively manufactured. The P4SMA150A carries RoHS compliance certification and is available in Tape & Reel packaging, supporting automated assembly processes. The operating temperature range (-55 to 150°C) is narrower than the original part at the lower bound but remains suitable for standard industrial and telecom applications.

SMAJP4KE150A-TP (Micro Commercial Co) provides an alternative substitute with identical electrical specifications. This part offers an extended upper operating temperature limit (-55 to 175°C), which may be advantageous for high-temperature environments. SMAJP4KE150A-TP is supplied in bulk packaging and carries REACH compliance status. Both substitutes are electrically interchangeable with the P4SMA150 for transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA150A and SMAJP4KE150A-TP be used interchangeably with P4SMA150?

A: Yes. Both substitutes maintain the critical electrical parameters: 128V reverse standoff voltage, 2A peak pulse current, and 400W peak pulse power. The clamping voltage difference (207V vs. 217.35V) represents a 4.8% reduction and remains within acceptable operational margins for transient suppression circuits.

Q: What is the primary reason to substitute the P4SMA150?

A: The P4SMA150 is classified as obsolete. P4SMA150A and SMAJP4KE150A-TP are active products with established supply chains, ensuring long-term procurement availability and design continuity.

Q: Are there packaging differences between the substitutes?

A: All three parts use the DO-214AC (SMA) surface mount package. P4SMA150A is supplied in Tape & Reel format, optimized for automated assembly. SMAJP4KE150A-TP is supplied in bulk packaging. Package selection depends on production volume and assembly process requirements.

Q: Do the substitutes meet the same compliance standards?

A: P4SMA150A is RoHS compliant. SMAJP4KE150A-TP carries REACH compliance status. Both meet the ECCN EAR99 and HTSUS 8541.10.0080 classifications of the original part. Verify specific compliance requirements for your application and region.

Q: What is the operating temperature difference, and does it matter?

A: The P4SMA150 operates from -65 to 150°C. P4SMA150A operates from -55 to 150°C, and SMAJP4KE150A-TP operates from -55 to 175°C. For applications requiring operation below -55°C, the original P4SMA150 specification must be maintained. For high-temperature applications above 150°C, SMAJP4KE150A-TP is the appropriate choice.