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SZP6SMB16AT3G Equivalent & Substitute Parts
Part Overview
The SZP6SMB16AT3G is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA SMB surface mount package. This component is designed for transient overvoltage protection with a 13.6V reverse standoff voltage and 22.5V maximum clamping voltage. The part is active in production status and carries AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications requiring reliable surge suppression. Equivalent substitute parts are identified based on matching electrical characteristics, package specifications, and compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 13.6 | V |
| Voltage - Breakdown (Min) | 15.2 | V |
| Voltage - Clamping (Max) @ Ipp | 22.5 | V |
| Current - Peak Pulse (10/1000µs) | 27 | A |
| Power - Peak Pulse | 600 | W |
| Capacitance @ 1MHz | 1110 | pF |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
Substitute Part Grouping Explanation
Substitution of the SZP6SMB16AT3G is determined by the following critical electrical and mechanical parameters:
- Voltage - Reverse Standoff (Typ): 13.6V
- Voltage - Breakdown (Min): 15.2V
- Voltage - Clamping (Max) @ Ipp: 22.5V
- Current - Peak Pulse (10/1000µs): ≥27A
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
- Type: Zener
The substitute part P6SMB16A from Eaton - Electronics Division meets all critical electrical specifications and package requirements. Both parts operate within the same voltage protection window, support equivalent peak pulse current ratings, and are housed in identical SMB surface mount packages. The substitute maintains functional equivalence for transient voltage suppression applications.
Parameter Comparison
| Parameter | SZP6SMB16AT3G (Littelfuse) | P6SMB16A (Eaton) | Match Status |
|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 13.6V | 13.6V | Matched |
| Voltage - Breakdown (Min) | 15.2V | 15.2V | Matched |
| Voltage - Clamping (Max) @ Ipp | 22.5V | 22.5V | Matched |
| Current - Peak Pulse (10/1000µs) | 27A | 27.1A | Equivalent |
| Power - Peak Pulse | 600W | 600W | Matched |
| Operating Temperature Range | -65 to 150°C (TJ) | -55 to 150°C (TJ) | Eaton range narrower |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | Matched |
| Mounting Type | Surface Mount | Surface Mount | Matched |
| Type | Zener | Zener | Matched |
| Unidirectional Channels | 1 | 1 | Matched |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | Both compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Matched |
Engineering Selection Recommendations
The P6SMB16A from Eaton - Electronics Division is a direct functional equivalent to the SZP6SMB16AT3G. Both parts are active in production status and comply with RoHS regulations. The Littelfuse part carries AEC-Q101 automotive qualification; the Eaton substitute does not list this certification in the provided data. For applications requiring AEC-Q101 compliance, the SZP6SMB16AT3G remains the specified choice. For general industrial and commercial transient voltage suppression applications, the P6SMB16A provides equivalent electrical performance and identical package compatibility. The Eaton part supports a narrower operating temperature range (-55 to 150°C versus -65 to 150°C), which should be evaluated against application requirements in extreme cold environments.
Frequently Asked Questions (FAQ)
Q: Can P6SMB16A replace SZP6SMB16AT3G in automotive applications?
A: Both parts share identical electrical specifications and SMB package form factors. However, the SZP6SMB16AT3G carries AEC-Q101 automotive qualification while the P6SMB16A does not list this certification. For automotive applications requiring AEC-Q101 compliance, the Littelfuse part is the specified choice.
Q: What is the difference in peak pulse current between these parts?
A: The SZP6SMB16AT3G is rated at 27A peak pulse current, while the P6SMB16A is rated at 27.1A. This 0.1A difference is negligible for practical circuit design and both parts are functionally equivalent in this parameter.
Q: Are the operating temperature ranges compatible?
A: The SZP6SMB16AT3G operates from -65 to 150°C, while the P6SMB16A operates from -55 to 150°C. The Eaton part has a narrower low-temperature range. Applications requiring operation below -55°C must use the Littelfuse part.
Q: Do both parts use the same package?
A: Yes. Both the SZP6SMB16AT3G and P6SMB16A use the DO-214AA SMB surface mount package with identical pinout and footprint compatibility.
Q: What compliance certifications apply to these parts?
A: Both parts are RoHS compliant and have MSL rating of 1 (Unlimited). The SZP6SMB16AT3G additionally carries AEC-Q101 automotive qualification. Both are REACH Unaffected and classified as EAR99 for export control purposes.
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