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P6SMB56 Equivalent & Substitute Parts
Part Overview
The P6SMB56 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 47.8V reverse standoff voltage with 80.85V maximum clamping voltage and 7.9A peak pulse current capability in a DO-214AA (SMB) package. The original part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 47.8 | V |
| Voltage - Breakdown (Min) | 50.4 | V |
| Voltage - Clamping (Max) @ Ipp | 80.85 | V |
| Current - Peak Pulse (10/1000µs) | 7.9 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the P6SMB56 is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 47.8V
- Voltage - Clamping (Max) @ Ipp: Must not exceed 80.85V
- Current - Peak Pulse (10/1000µs): 7.9A minimum
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional (1 channel)
Substitute parts must maintain compatibility across these parameters to ensure functional equivalence in circuit protection applications. Parts with lower clamping voltages provide enhanced protection margins, while parts with identical or higher current ratings ensure adequate transient suppression capability.
Parameter Comparison
| Parameter | P6SMB56 (Littelfuse) | P6SMB56A (Eaton) | P6SMB56A-E3/5B (Vishay) | SMBJP6KE56A-TP (MCC) | TVP06B560A-G (Comchip) |
|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 47.8V | 47.8V | 47.8V | 47.8V | — |
| Voltage - Breakdown (Min) | 50.4V | 53.2V | 53.2V | 53.2V | — |
| Voltage - Clamping (Max) @ Ipp | 80.85V | 77V | 77V | 77V | — |
| Current - Peak Pulse (10/1000µs) | 7.9A | 7.9A | 7.8A | 7.9A | — |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -55 to 150°C | -55 to 150°C | -65 to 150°C | -55 to 175°C | -55 to 150°C |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Product Status | Obsolete | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and full RoHS compliance, ensuring long-term availability and regulatory conformance. The P6SMB56A (Eaton) and SMBJP6KE56A-TP (Micro Commercial Co) provide identical peak pulse current ratings (7.9A) with improved clamping voltage performance (77V vs. 80.85V), delivering superior transient suppression. The P6SMB56A-E3/5B (Vishay) offers extended lower operating temperature capability (-65°C minimum) and maintains ROHS3 compliance. The TVP06B560A-G (Comchip) is electrically qualified for the same package and power dissipation envelope, though specific voltage parameters are not provided in the datasheet reference.
Selection should prioritize parts with active product status to ensure sustained supply chain availability and technical support. All candidates meet the DO-214AA (SMB) package requirement and 600W peak pulse power specification.
Frequently Asked Questions (FAQ)
Q: Can P6SMB56A substitute for P6SMB56 in existing designs?
A: Yes. The P6SMB56A maintains the same 47.8V reverse standoff voltage, identical 7.9A peak pulse current, and 600W power dissipation. The lower clamping voltage (77V vs. 80.85V) provides enhanced protection margins. Both use DO-214AA (SMB) packaging for direct PCB compatibility.
Q: What is the difference between P6SMB56A and P6SMB56A-E3/5B?
A: Both parts share identical voltage and current specifications. The P6SMB56A-E3/5B extends the lower operating temperature limit to -65°C (vs. -55°C) and carries Vishay's TransZorb® series designation. Peak pulse current is marginally lower at 7.8A. Selection depends on thermal environment requirements.
Q: Why does TVP06B560A-G lack specific voltage parameters?
A: The TVP06B560A-G is qualified for the same DO-214AA (SMB) package and 600W peak pulse power specification. Detailed voltage and current parameters are not provided in the available reference data. Verification against the manufacturer's complete datasheet is required before design implementation.
Q: Are all substitutes available in Tape & Reel packaging?
A: Yes. All active substitute parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The original P6SMB56 packaging format is not specified in the available data.
Q: Do all substitutes meet RoHS compliance requirements?
A: Yes. All substitute parts carry RoHS compliance certification (RoHS Compliant or ROHS3 Compliant), ensuring regulatory conformance for EU and equivalent markets.
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