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P6SMB43CA-Q Equivalent & Substitute Parts
Part Overview
The P6SMB43CA-Q is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient protection. This surface mount component operates with a reverse standoff voltage of 36.8V and provides clamping at 59.3V with peak pulse current handling of 10.3A. The part is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility to support procurement flexibility and supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 36.8 | V |
| Voltage - Breakdown (Min) | 40.9 | V |
| Voltage - Clamping (Max) @ Ipp | 59.3 | V |
| Current - Peak Pulse (10/1000µs) | 10.3 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Qualification | AEC-Q101 | — |
| Mounting Type | Surface Mount | — |
Substitute Part Grouping Explanation
Substitution of the P6SMB43CA-Q is determined by the following critical parameters:
Electrical Compatibility Criteria:
- Reverse standoff voltage within ±0.8V of 36.8V nominal
- Breakdown voltage minimum within ±0.9V of 40.9V
- Clamping voltage maximum within ±1.2V of 59.3V
- Peak pulse current rating of 10.3A or higher
- Peak pulse power rating of 600W or higher
Mechanical & Environmental Criteria:
- Package type: DO-214AA (SMB) surface mount only
- Bidirectional channels: 1 channel
- Operating temperature range: -55°C to 150°C minimum
- AEC-Q101 automotive qualification required
- RoHS3 compliance required
The substitute part SMBJE36CAH from Eaton - Electronics Division meets all substitution criteria within the allowed parameter tolerances for this product category.
Parameter Comparison
| Parameter | P6SMB43CA-Q (Bourns) | SMBJE36CAH (Eaton) | Tolerance / Match |
|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 36.8V | 36V | -0.8V |
| Voltage - Breakdown (Min) | 40.9V | 40V | -0.9V |
| Voltage - Clamping (Max) @ Ipp | 59.3V | 58.1V | -1.2V |
| Current - Peak Pulse (10/1000µs) | 10.3A | 10.4A | +0.1A |
| Power - Peak Pulse | 600W | 600W | Match |
| Operating Temperature Range | -55 to 150°C | -55 to 150°C | Match |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | Match |
| Qualification | AEC-Q101 | AEC-Q101 | Match |
| Bidirectional Channels | 1 | 1 | Match |
| RoHS Status | ROHS3 Compliant | Not specified in data | — |
Engineering Selection Recommendations
Primary Selection: P6SMB43CA-Q The P6SMB43CA-Q remains the primary choice when available. It is actively produced by Bourns Inc., carries AEC-Q101 automotive qualification, and is confirmed RoHS3 compliant. Current inventory of 887 pieces supports immediate procurement.
Substitute Selection: SMBJE36CAH The SMBJE36CAH from Eaton - Electronics Division is a qualified substitute when the primary part is unavailable. It meets all electrical parameter requirements within specified tolerances and maintains identical package, temperature range, and AEC-Q101 qualification. Higher inventory availability (2465 pieces) supports supply chain flexibility. Both parts are classified as Zener-type TVS diodes with single bidirectional channels for telecom transient protection applications.
Compliance Status: Both parts maintain AEC-Q101 automotive qualification and operate across the full -55°C to 150°C temperature range. The P6SMB43CA-Q carries explicit RoHS3 compliance certification. Selection between these parts does not compromise application performance or regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can SMBJE36CAH directly replace P6SMB43CA-Q in existing designs? A: Yes. Both parts share identical DO-214AA (SMB) package geometry, mounting type, and electrical performance within specified tolerances. No PCB layout or footprint modifications are required.
Q: What are the key electrical differences between these parts? A: The SMBJE36CAH operates at 36V reverse standoff (0.8V lower) and 58.1V clamping (1.2V lower) compared to the P6SMB43CA-Q at 36.8V and 59.3V respectively. Peak pulse current is marginally higher at 10.4A versus 10.3A. These differences remain within acceptable substitution tolerances for telecom transient protection circuits.
Q: Are both parts automotive qualified? A: Yes. Both the P6SMB43CA-Q and SMBJE36CAH carry AEC-Q101 automotive qualification and operate across -55°C to 150°C junction temperature range.
Q: What is the package compatibility? A: Both parts use the DO-214AA (SMB) surface mount package. They are mechanically and electrically interchangeable at the PCB level without design modifications.
Q: Which part should be selected for new designs? A: Selection should be based on availability and supply chain requirements. Both parts meet identical functional and compliance criteria. The P6SMB43CA-Q is the original specification; SMBJE36CAH serves as a qualified alternative when supply constraints exist.
Q: Are there any moisture sensitivity concerns? A: Both parts carry MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture control requirements during storage or handling.
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