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Equivalent & Substitute Parts for P6SMB13 TVS Diode
Part Overview
The P6SMB13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 11.1V reverse standoff voltage and 19.11V maximum clamping voltage with 34.6A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Reverse Standoff Voltage (Typ) | 11.1V |
| Breakdown Voltage (Min) | 11.75V |
| Clamping Voltage (Max) @ Ipp | 19.11V |
| Peak Pulse Current (10/1000µs) | 34.6A |
| Peak Pulse Power | 600W |
| Operating Temperature Range | -55°C to 150°C (TJ) |
| Package Type | DO-214AA (SMB) |
| Mounting Type | Surface Mount |
| Diode Type | Zener |
| Channels | 1 (Unidirectional) |
Substitute Part Grouping Explanation
Substitution eligibility for the P6SMB13 is determined by the following critical parameters:
- Reverse standoff voltage within 11.0V to 11.1V range
- Peak pulse current capability of 33.0A or greater
- Clamping voltage (Max) @ Ipp between 18.2V and 19.11V
- Peak pulse power rating of 600W
- Operating temperature range covering -55°C to 150°C minimum
- Surface-mount package in DO-214AA (SMB) form factor
- Unidirectional zener diode configuration
All substitute parts listed maintain these electrical and mechanical parameters within acceptable tolerances for direct replacement in the original application circuit.
Parameter Comparison
| Parameter | P6SMB13 (Littelfuse) | P6SMB13A (Eaton) | SMBJ11A (Meritek) | SMBJ11AE3/TR13 (Microchip) |
|---|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Eaton - Electronics Division | Meritek | Microchip Technology |
| Reverse Standoff Voltage (Typ) | 11.1V | 11.1V | 11V | 11V |
| Breakdown Voltage (Min) | 11.75V | 12.4V | 12.2V | 12.2V |
| Clamping Voltage (Max) @ Ipp | 19.11V | 18.2V | 18.2V | 18.2V |
| Peak Pulse Current (10/1000µs) | 34.6A | 34.6A | 32.97A | 33A |
| Peak Pulse Power | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -55°C to 150°C | -55°C to 150°C | -55°C to 150°C | -65°C to 150°C |
| Package / Case | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AA (SMB) |
| Product Status | Obsolete | Active | Active | Active |
| RoHS Compliance | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
All three substitute parts are actively manufactured and available, addressing the obsolescence status of the original P6SMB13. Selection should be based on the following factors:
P6SMB13A (Eaton - Electronics Division) maintains the highest electrical parameter alignment with the original part, including identical reverse standoff voltage (11.1V) and peak pulse current (34.6A). This part carries active product status and full RoHS compliance, with substantial inventory availability (23,850 pcs).
SMBJ11A (Meritek) provides equivalent electrical performance with a 0.1V lower reverse standoff voltage and marginally reduced peak pulse current (32.97A). The part is actively produced with the largest inventory position (50,100 pcs) and maintains ROHS3 compliance.
SMBJ11AE3/TR13 (Microchip Technology) offers the widest operating temperature range (-65°C to 150°C) and active product status. Peak pulse current specification is 33A, with clamping voltage at 18.2V. This part is supplied in Tape & Reel packaging and carries ROHS3 compliance with REACH Unaffected status.
All substitute parts are qualified for general-purpose transient voltage suppression applications and maintain the same DO-214AA (SMB) surface-mount package footprint.
Frequently Asked Questions (FAQ)
Q: Can P6SMB13A be used as a direct replacement for P6SMB13?
A: Yes. P6SMB13A maintains identical reverse standoff voltage (11.1V), peak pulse current (34.6A), and peak pulse power (600W) specifications. The clamping voltage is 18.2V versus 19.11V on the original, which remains within acceptable substitution parameters for the same circuit application.
Q: What is the difference between SMBJ11A and SMBJ11AE3/TR13?
A: Both parts share the same electrical specifications (11V reverse standoff, 18.2V clamping voltage, 33A peak pulse current). The primary difference is packaging: SMBJ11AE3/TR13 is supplied in Tape & Reel format with a wider operating temperature range (-65°C to 150°C versus -55°C to 150°C). SMBJ11A does not specify a supplier device package format.
Q: Are all substitute parts compatible with the original PCB footprint?
A: Yes. All substitute parts use the DO-214AA (SMB) package, which maintains identical mechanical dimensions and land pattern compatibility with the original P6SMB13.
Q: Which substitute part has the best availability?
A: SMBJ11A (Meritek) has the highest inventory position at 50,100 pieces. P6SMB13A (Eaton) follows with 23,850 pieces. SMBJ11AE3/TR13 (Microchip) has the lowest inventory at 1,048 pieces.
Q: Do all substitute parts meet RoHS requirements?
A: Yes. P6SMB13A is RoHS Compliant. SMBJ11A and SMBJ11AE3/TR13 are both ROHS3 Compliant. All parts meet current environmental compliance standards.
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