Equivalent & Substitute Parts for P4SMA150A TVS Diode

Part Overview

The P4SMA150A is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This unidirectional Zener diode operates with a reverse standoff voltage of 128V and provides clamping protection at 207V maximum. The component is packaged in DO-214AC (SMA) format and is RoHS3 compliant with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching or compatible electrical characteristics and package specifications to support design flexibility and supply chain continuity.

Substiute Parts

P4SMA150A

Littelfuse Inc.In Stock: 10342P4SMA150A Datasheet

Current PartRFQ

P4SMA150A

Eaton - Electronics DivisionIn Stock: 10393P4SMA150A Datasheet

MFR RecommendedRFQ

P4SMA150A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 2561P4SMA150A-E3/61 Datasheet

MFR RecommendedRFQ

SMAJ150A-TP

Micro Commercial CoIn Stock: 4482SMAJ150A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA150A are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 128V or 150V
• Voltage - Clamping (Max) @ Ipp: 207V or 243V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Substitution Logic: Parts with identical reverse standoff voltage (128V) and clamping voltage (207V) are direct equivalents. Parts with higher standoff voltage (150V) and higher clamping voltage (243V) represent functional alternatives for applications requiring higher voltage protection margins. All substitute parts maintain DO-214AC (SMA) surface-mount packaging and comply with RoHS requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Characteristics): The P4SMA150A from Eaton - Electronics Division is a direct equivalent to the Littelfuse P4SMA150A, matching all critical electrical parameters including reverse standoff voltage (128V), clamping voltage (207V), peak pulse current (2A), and peak pulse power (400W). Both maintain RoHS3 compliance and unlimited MSL rating. Selection between these two manufacturers depends on supply availability and procurement requirements.

Compatible Alternative (Reduced Peak Pulse Ratings): The P4SMA150A-E3/61 from Vishay General Semiconductor maintains identical voltage specifications (128V standoff, 207V clamping) but operates at reduced peak pulse current (1.4A) and power (300W). This part is suitable for applications with lower transient current requirements and provides the same temperature operating range (-65°C to 150°C). RoHS3 compliance and unlimited MSL rating are maintained.

Higher Voltage Alternative (Elevated Protection Margins): The SMAJ150A-TP from Micro Commercial Co provides higher voltage protection with 150V reverse standoff and 243V clamping voltage. Peak pulse current is 1.6A with 400W peak pulse power. This part supports an extended upper operating temperature of 175°C and is suitable for applications requiring higher voltage transient suppression. RoHS3 compliance and unlimited MSL rating apply.

All substitute parts are active products with confirmed inventory availability and maintain surface-mount DO-214AC (SMA) packaging compatibility.

Frequently Asked Questions (FAQ)

Q: Can the P4SMA150A-E3/61 from Vishay be used as a direct replacement for the Littelfuse P4SMA150A? A: Yes, the P4SMA150A-E3/61 is functionally compatible for applications where peak pulse current requirements do not exceed 1.4A. The voltage specifications (128V standoff, 207V clamping) are identical. If your circuit requires the full 2A peak pulse current capability, verify that the reduced rating is acceptable for your transient protection design.

Q: What is the difference between the P4SMA150A and SMAJ150A-TP? A: The SMAJ150A-TP operates at higher voltage levels (150V standoff, 243V clamping) compared to the P4SMA150A (128V standoff, 207V clamping). Both use DO-214AC (SMA) packaging. The SMAJ150A-TP is selected when higher voltage transient protection margins are required. Peak pulse current differs: SMAJ150A-TP provides 1.6A versus the P4SMA150A's 2A.

Q: Are all substitute parts RoHS compliant? A: Yes, all listed substitute parts are RoHS compliant. The Littelfuse and Vishay parts carry ROHS3 certification, while the Eaton part carries RoHS compliance certification. All parts maintain unlimited moisture sensitivity rating (MSL 1).

Q: Can I use the SMAJ150A-TP in place of the P4SMA150A without circuit modifications? A: The SMAJ150A-TP is pin-compatible and uses the same DO-214AC (SMA) package. However, the higher voltage specifications (150V standoff, 243V clamping) mean it will not clamp transients at the same voltage level as the P4SMA150A. Use this part only if your circuit design accommodates higher clamping voltages or if you require the extended temperature range (-55°C to 175°C).

Q: What is the operating temperature difference between these parts? A: The Littelfuse P4SMA150A and Vishay P4SMA150A-E3/61 both operate from -65°C to 150°C (junction temperature). The Eaton P4SMA150A operates from -55°C to 150°C (junction temperature). The SMAJ150A-TP from Micro Commercial operates from -55°C to 175°C (ambient temperature), providing the widest temperature range. Select based on your application's thermal requirements.