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P6SMBJ75 Equivalent & Substitute Parts
Part Overview
The P6SMBJ75 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 a 64.1V reverse standoff voltage, 108.15V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | P6SMBJ75 | — |
| Manufacturer | Littelfuse Inc. | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| Voltage - Reverse Standoff (Typ) | 64.1 | V |
| Voltage - Breakdown (Min) | 67.55 | V |
| Voltage - Clamping (Max) @ Ipp | 108.15 | V |
| Current - Peak Pulse (10/1000µs) | 5.9 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the P6SMBJ75 is determined by the following critical electrical and mechanical parameters:
Electrical Compatibility Criteria:
- Unidirectional channel configuration (1 channel required)
- Reverse standoff voltage within the 64V range
- Breakdown voltage minimum in the 67–71V range
- Clamping voltage maximum between 103–134V
- Peak pulse current capability of 5.8–30A
- Peak pulse power rating of 600W
- Operating temperature range of -55°C to 150°C (minimum)
Mechanical Compatibility Criteria:
- Surface-mount package type (DO-214AA / SMB)
- RoHS3 compliance or equivalent environmental standard
- Moisture sensitivity level MSL 1
The substitute parts listed below meet these criteria and are classified as active products with current manufacturing status, ensuring long-term availability and supply chain continuity.
Parameter Comparison
| Parameter | P6SMBJ75 (Main) | P6SMB75A | SMBJ64A | SM6T75AY | SMBJ58E3/TR13 | SMBJ64AE3/TR13 |
|---|---|---|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Eaton - Electronics Division | Meritek | STMicroelectronics | Microchip Technology | Microchip Technology |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Type | Zener | Zener | Zener | Zener | Zener | Zener |
| Unidirectional Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Reverse Standoff (Typ) | 64.1 V | 6.4 V | 64 V | 64.1 V | 58 V | 64 V |
| Voltage - Breakdown (Min) | 67.55 V | 7.13 V | 71.1 V | 71.3 V | 64.4 V | 71.1 V |
| Voltage - Clamping (Max) @ Ipp | 108.15 V | 11.3 V | 103 V | 134 V | 103 V | 103 V |
| Current - Peak Pulse (10/1000µs) | 5.9 A | 54 A | 5.83 A | 30 A (8/20µs) | 5.8 A | 5.8 A |
| Power - Peak Pulse | 600 W | 600 W | 600 W | 600 W | 600 W | 600 W |
| Operating Temperature Range | -55 to 150 °C (TJ) | -55 to 150 °C (TJ) | -55 to 150 °C | -55 to 150 °C (TJ) | -65 to 150 °C (TJ) | -65 to 150 °C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA (SMB) | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Closest Electrical Match):
SMBJ64A (Meritek) and SMBJ64AE3/TR13 (Microchip Technology) are the most direct substitutes for the P6SMBJ75. Both maintain the 64V reverse standoff voltage, 103V clamping voltage, and 5.8–5.83A peak pulse current specifications. Both are active products with ROHS3 compliance and MSL 1 rating. SMBJ64AE3/TR13 offers extended operating temperature range (-65°C to 150°C) and is supplied in tape-and-reel packaging.
Secondary Substitute (Automotive Grade):
SM6T75AY (STMicroelectronics) provides equivalent reverse standoff voltage (64.1V) and maintains 600W peak pulse power. This part carries AEC-Q101 automotive qualification and ROHS3 compliance. The 134V clamping voltage is higher than the main part, and peak pulse current is specified at 30A (8/20µs pulse), making it suitable for applications requiring automotive-grade reliability.
Not Recommended:
P6SMB75A (Eaton) and SMBJ58E3/TR13 (Microchip Technology) do not meet the electrical substitution criteria. P6SMB75A operates at 6.4V reverse standoff voltage, and SMBJ58E3/TR13 operates at 58V reverse standoff voltage, both significantly below the P6SMBJ75 specification of 64.1V.
Frequently Asked Questions (FAQ)
Q: Can P6SMB75A be used as a substitute for P6SMBJ75?
A: No. P6SMB75A operates at 6.4V reverse standoff voltage, which is incompatible with the P6SMBJ75 specification of 64.1V. The voltage rating difference makes this part unsuitable for the same application.
Q: What is the difference between SMBJ64A and SMBJ64AE3/TR13?
A: Both parts share identical electrical specifications (64V reverse standoff, 103V clamping, 5.8–5.83A peak pulse current). The primary difference is packaging: SMBJ64AE3/TR13 is supplied in tape-and-reel format and offers an extended operating temperature range of -65°C to 150°C compared to SMBJ64A at -55°C to 150°C.
Q: Is SM6T75AY suitable for general-purpose applications?
A: SM6T75AY is suitable for general-purpose applications and carries automotive-grade qualification (AEC-Q101). The higher clamping voltage (134V vs. 108.15V) and higher peak pulse current capability (30A vs. 5.9A) make it appropriate for applications requiring enhanced transient protection or automotive compliance.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed are ROHS3 compliant or equivalent, meeting environmental and hazardous substance restrictions.
Q: What is the significance of MSL 1 rating?
A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture-related degradation concerns. All parts listed, including the main part and substitutes, carry MSL 1 rating, ensuring consistent handling and storage requirements.
Q: Can SMBJ58E3/TR13 replace P6SMBJ75?
A: No. SMBJ58E3/TR13 operates at 58V reverse standoff voltage, which is below the P6SMBJ75 specification of 64.1V. This voltage difference makes it electrically incompatible for direct substitution.
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