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P4SMA150C Equivalent & Substitute Parts
Part Overview
The P4SMA150C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This part operates with a 128V reverse standoff voltage and provides 217.35V clamping at peak pulse current. The P4SMA150C is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Reverse Standoff Voltage (Typ) | 128V |
| Voltage - Breakdown (Min) | 135.85V |
| Voltage - Clamping (Max) @ Ipp | 217.35V |
| Current - Peak Pulse (10/1000µs) | 2A |
| Power - Peak Pulse | 400W |
| Type | Zener |
| Bidirectional Channels | 1 |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AC, SMA |
| Operating Temperature Range | -65°C ~ 150°C (TJ) |
Substitute Part Grouping Explanation
Substitute parts for the P4SMA150C are qualified based on the following critical parameters:
- Reverse standoff voltage of 128V (typical)
- Peak pulse current rating of 2A
- Peak pulse power rating of 400W
- Single bidirectional channel configuration
- Surface mount package in DO-214AC (SMA) form factor
- Zener diode type
The identified substitutes maintain these core electrical and mechanical specifications, ensuring functional compatibility in the original application circuit. Variations in clamping voltage (207V to 217.35V) and breakdown voltage remain within acceptable operating margins for TVS diode applications.
Parameter Comparison
| Parameter | P4SMA150C (Littelfuse) | P4SMA150CA (Eaton) | SMAJP4KE150CA-TP (Micro Commercial Co) |
|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Eaton - Electronics Division | Micro Commercial Co |
| Product Status | Obsolete | Active | Active |
| Reverse Standoff Voltage (Typ) | 128V | 128V | 128V |
| Voltage - Breakdown (Min) | 135.85V | 143V | 143V |
| Voltage - Clamping (Max) @ Ipp | 217.35V | 207V | 207V |
| Current - Peak Pulse (10/1000µs) | 2A | 2A | 2A |
| Power - Peak Pulse | 400W | 400W | 400W |
| Type | Zener | Zener | Zener |
| Bidirectional Channels | 1 | 1 | 1 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA |
| Operating Temperature Range | -65°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | -55°C ~ 175°C (TJ) |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | REACH Unaffected |
| Packaging | - | Tape & Reel (TR) | Bulk |
Engineering Selection Recommendations
Both P4SMA150CA (Eaton) and SMAJP4KE150CA-TP (Micro Commercial Co) are active production alternatives to the obsolete P4SMA150C.
The P4SMA150CA from Eaton is the manufacturer-recommended substitute, maintaining identical reverse standoff voltage and peak pulse specifications. This part carries RoHS compliance certification and is available in tape and reel packaging, suitable for automated assembly processes. The operating temperature range extends to 150°C, matching the original part's upper limit.
The SMAJP4KE150CA-TP from Micro Commercial Co provides an alternative with extended operating temperature capability to 175°C. This part is available in bulk packaging and maintains all critical electrical parameters. REACH status is unaffected, indicating no regulatory restrictions on use.
Selection between these substitutes should be based on packaging requirements (tape and reel versus bulk), inventory availability, and thermal operating margin requirements for the specific application.
Frequently Asked Questions (FAQ)
Q: Can P4SMA150CA be used as a direct replacement for P4SMA150C?
A: Yes. Both parts share identical reverse standoff voltage (128V), peak pulse current (2A), and peak pulse power (400W) ratings. The clamping voltage difference (207V versus 217.35V) falls within acceptable operating margins for TVS diode applications. Package and mounting type are identical.
Q: What is the significance of the clamping voltage difference between P4SMA150C and its substitutes?
A: The P4SMA150C clamps at 217.35V maximum, while both substitutes clamp at 207V maximum. This 10.35V difference represents improved clamping performance in the substitutes, providing lower transient voltage peaks during suppression events. This is a favorable characteristic for circuit protection.
Q: Are there packaging differences between the substitute parts?
A: Yes. P4SMA150CA is supplied in tape and reel (TR) packaging for automated assembly, while SMAJP4KE150CA-TP is supplied in bulk packaging. Both use the same DO-214AC (SMA) form factor and are surface mount compatible.
Q: Does the operating temperature range affect part selection?
A: The P4SMA150C operates from -65°C to 150°C. P4SMA150CA operates from -55°C to 150°C, and SMAJP4KE150CA-TP operates from -55°C to 175°C. If the application requires operation below -55°C, neither substitute is suitable. If extended high-temperature operation above 150°C is required, SMAJP4KE150CA-TP provides additional margin.
Q: Are both substitutes RoHS compliant?
A: P4SMA150CA carries RoHS compliance certification. SMAJP4KE150CA-TP has REACH unaffected status, indicating no regulatory restrictions. Verify compliance requirements for your specific application and region.
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