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SMBJ70CHE3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ70CHE3/52 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AA (SMB) package. This component provides bidirectional transient voltage suppression with a 70V reverse standoff voltage and 125V maximum clamping voltage at peak pulse current. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ70CHE3/52 |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Product Status | Obsolete |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 70V |
| Voltage - Breakdown (Min) | 77.8V |
| Voltage - Clamping (Max) @ Ipp | 125V |
| Current - Peak Pulse (10/1000µs) | 4.8A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C 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 SMBJ70CHE3/52 is determined by the following critical electrical and mechanical parameters:
Electrical Matching Criteria:
- Voltage - Reverse Standoff (Typ): 70V
- Voltage - Breakdown (Min): 77.8V
- Package / Case: DO-214AA, SMB
- Bidirectional Channels: 1
- Type: Zener
Acceptable Parameter Variations:
- Voltage - Clamping (Max) @ Ipp: 113V to 146V (within transient suppression design tolerance)
- Current - Peak Pulse (10/1000µs): 4.8A to 27A (higher current capability acceptable for same voltage class)
- Operating Temperature Range: -55°C to 175°C (extended range acceptable)
- Power - Peak Pulse: 600W (consistent across all substitutes)
Compliance Requirements:
- RoHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
- Surface Mount, DO-214AA package mandatory
Substitute parts must maintain the 70V reverse standoff voltage and DO-214AA package form factor. Variations in clamping voltage and peak pulse current are acceptable provided they remain within the specified ranges for the 70V voltage class.
Parameter Comparison
| Parameter | SMBJ70CHE3/52 (Main) | SMBJ70CE3/TR13 | SM6T82CAY | SMBJ70CA | SMBJ70CA-13-F | SMBJ70CA-TP | SMBJ70CA-TR |
|---|---|---|---|---|---|---|---|
| Manufacturer | Vishay | Microchip Technology | STMicroelectronics | Semtech Corporation | Diodes Incorporated | Micro Commercial Co | STMicroelectronics |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| Voltage - Reverse Standoff (Typ) | 70V | 70V | 70V | 70V | 70V | 70V | 70V |
| Voltage - Breakdown (Min) | 77.8V | 77.8V | 77.8V | 77.8V | 77.8V | 77.8V | 77.8V |
| Voltage - Clamping (Max) @ Ipp | 125V | 125V | 146V | 113V | 113V | 113V | 113V |
| Current - Peak Pulse (10/1000µs) | 4.8A | 4.8A | 27A (8/20µs) | 5.3A | 5.3A | 5.3A | 5.5A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -55°C to 150°C | -65°C to 150°C | -55°C to 150°C | -55°C to 175°C | -55°C to 150°C | -55°C to 175°C | -55°C to 150°C |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Closest Electrical Match):
SMBJ70CE3/TR13 (Microchip Technology) and SMBJ70CHE3/52 share identical electrical specifications with 125V clamping voltage and 4.8A peak pulse current. SMBJ70CE3/TR13 is active production status with extended temperature range to -65°C and is available in Tape & Reel packaging.
Secondary Substitutes (Acceptable Electrical Variation):
SMBJ70CA (Semtech Corporation), SMBJ70CA-13-F (Diodes Incorporated), SMBJ70CA-TP (Micro Commercial Co), and SMBJ70CA-TR (STMicroelectronics) maintain the 70V reverse standoff voltage with reduced clamping voltage of 113V and peak pulse current of 5.3A to 5.5A. These parts are suitable for applications where the lower clamping voltage remains within circuit protection requirements. All are active production status with RoHS3 compliance.
Alternative with Enhanced Current Capability:
SM6T82CAY (STMicroelectronics) provides 70V reverse standoff voltage with significantly higher peak pulse current of 27A (8/20µs) and 146V clamping voltage. This part is suitable for applications requiring enhanced transient suppression capability and is automotive grade with AEC-Q101 qualification.
Compliance Considerations:
All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The original part's automotive grade and AEC-Q101 qualification are matched only by SM6T82CAY. For non-automotive applications, all active production substitutes are acceptable.
Frequently Asked Questions (FAQ)
Q: Can SMBJ70CA replace SMBJ70CHE3/52 directly?
A: Yes. Both parts maintain 70V reverse standoff voltage and DO-214AA package compatibility. SMBJ70CA operates with 113V clamping voltage versus the original 125V. This 12V difference is within acceptable transient suppression design tolerance for the 70V voltage class. Verify circuit protection requirements before substitution.
Q: What is the difference between SMBJ70CE3/TR13 and SMBJ70CA?
A: SMBJ70CE3/TR13 matches the original part's 125V clamping voltage and 4.8A peak pulse current. SMBJ70CA reduces clamping voltage to 113V with 5.3A peak pulse current. SMBJ70CE3/TR13 is the closer electrical equivalent. Both are active production and RoHS3 compliant.
Q: Is SM6T82CAY a suitable substitute?
A: SM6T82CAY maintains 70V reverse standoff voltage and DO-214AA package compatibility. It provides higher peak pulse current (27A) and clamping voltage (146V), making it suitable for applications requiring enhanced transient suppression. It is automotive grade with AEC-Q101 qualification, matching the original part's automotive credentials.
Q: Are packaging variants (Tape & Reel, Cut Tape) interchangeable?
A: Yes. Packaging variants (TR, CT, Digi-Reel) refer to supply format only and do not affect electrical performance or PCB compatibility. All variants use the same DO-214AA surface mount package. Select based on procurement and assembly requirements.
Q: What is the temperature range consideration for substitution?
A: The original part operates -55°C to 150°C. SMBJ70CE3/TR13 extends to -65°C (lower limit), and SMBJ70CA and SMBJ70CA-TP extend to 175°C (upper limit). Extended temperature ranges are acceptable for the same voltage class. Verify application temperature requirements before selection.
Q: Can I use multiple substitute parts interchangeably in the same design?
A: All listed substitutes maintain 70V reverse standoff voltage and DO-214AA package compatibility. However, clamping voltage variations (113V to 146V) may affect circuit protection performance. Standardize on a single substitute part number for consistency across production units.
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