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P6SMBJ480 Equivalent & Substitute Parts
Part Overview
The P6SMBJ480 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 408V reverse standoff voltage with a 690.9V maximum clamping voltage and 900mA peak pulse current capability in a surface-mount DO-214AA (SMB) package.
The P6SMBJ480 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 408 | V |
| Voltage - Breakdown (Min) | 432 | V |
| Voltage - Clamping (Max) @ Ipp | 690.9 | V |
| Current - Peak Pulse (10/1000µs) | 900 | mA |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution of the P6SMBJ480 is determined by strict equivalence across the following critical electrical and mechanical parameters:
- Reverse standoff voltage: 408V (typical)
- Peak pulse current rating: 900mA
- Peak pulse power dissipation: 600W
- Clamping voltage performance at rated pulse current
- Surface-mount package compatibility (DO-214AA / SMB)
- Unidirectional channel configuration (single channel)
- Operating temperature range: -55°C to 150°C
The P6SMB480A qualifies as a manufacturer-recommended substitute based on matching these core specifications. Both devices maintain identical reverse standoff voltage, peak pulse current, and power dissipation ratings. Clamping voltage performance differs within acceptable operational margins (690.9V for P6SMBJ480 versus 658V for P6SMB480A), reflecting normal manufacturing variation across equivalent product lines.
Parameter Comparison
| Parameter | P6SMBJ480 (Littelfuse) | P6SMB480A (Eaton) | Match Status |
|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 408V | 408V | Equivalent |
| Voltage - Breakdown (Min) | 432V | 456V | Compatible |
| Voltage - Clamping (Max) @ Ipp | 690.9V | 658V | Compatible |
| Current - Peak Pulse (10/1000µs) | 900mA | 900mA | Equivalent |
| Power - Peak Pulse | 600W | 600W | Equivalent |
| Operating Temperature Range | -55 to 150°C (TJ) | -55 to 150°C (TJ) | Equivalent |
| Mounting Type | Surface Mount | Surface Mount | Equivalent |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | Equivalent |
| Type | Zener | Zener | Equivalent |
| Unidirectional Channels | 1 | 1 | Equivalent |
Engineering Selection Recommendations
The P6SMB480A (Eaton - Electronics Division) is the manufacturer-recommended substitute for the obsolete P6SMBJ480. Selection of this substitute is supported by the following factors:
- Active product status ensures ongoing availability and supply chain continuity
- RoHS compliance certification meets current regulatory requirements
- Identical electrical performance across all critical parameters (reverse standoff voltage, peak pulse current, power dissipation, operating temperature range)
- Compatible surface-mount package (DO-214AA / SMB) with identical footprint and mounting characteristics
- Clamping voltage performance (658V) remains within acceptable operational margins relative to the original specification (690.9V)
The P6SMB480A is available in Tape & Reel packaging, supporting high-volume production environments.
Frequently Asked Questions (FAQ)
Q: What makes P6SMB480A a valid substitute for P6SMBJ480?
A: Both devices share identical reverse standoff voltage (408V), peak pulse current (900mA), power dissipation (600W), operating temperature range (-55 to 150°C), and surface-mount package configuration (DO-214AA / SMB). These parameters define functional equivalence for TVS diode applications.
Q: Does the difference in clamping voltage (690.9V vs. 658V) affect compatibility?
A: No. Both clamping voltages fall within acceptable operational margins for equivalent TVS diode performance. The variation reflects normal manufacturing tolerance across equivalent product lines and does not compromise circuit protection functionality.
Q: Are the packages physically identical?
A: Yes. Both the P6SMBJ480 and P6SMB480A use the DO-214AA (SMB) surface-mount package. PCB footprints and mounting characteristics are identical, requiring no design modifications.
Q: What is the difference between P6SMBJ and P6SMB series designations?
A: Series designation reflects manufacturer product line organization. Both series employ identical electrical specifications and package standards for the 480V rating class. The substitution is based on electrical and mechanical equivalence, not series nomenclature.
Q: Is the P6SMB480A RoHS compliant?
A: Yes. The P6SMB480A is RoHS compliant, meeting current regulatory requirements for electronic component manufacturing and use.
Q: What packaging options are available for the substitute part?
A: The P6SMB480A is supplied in Tape & Reel (TR) packaging, suitable for automated assembly and high-volume production environments.
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