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SMBJ30-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ30-E3/52 is a 30V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose transient protection in surface-mount applications. This component features a 53.5V maximum clamping voltage, 11.2A peak pulse current capability, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ30-E3/52 |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Package / Case | DO-214AA, SMB |
| Voltage - Reverse Standoff (Typ) | 30V |
| Voltage - Breakdown (Min) | 33.3V |
| Voltage - Clamping (Max) @ Ipp | 53.5V |
| Current - Peak Pulse (10/1000µs) | 11.2A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the SMBJ30-E3/52 is determined by the following critical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff: 30V (exact match required)
- Voltage - Breakdown (Min): 33.3V (exact match required)
- Package / Case: DO-214AA, SMB (exact match required)
- Mounting Type: Surface Mount (exact match required)
- Type: Zener diode, Unidirectional (exact match required)
Secondary Compatibility Parameters:
- Voltage - Clamping (Max) @ Ipp: 48.4V to 53.5V (acceptable range for general-purpose protection)
- Current - Peak Pulse (10/1000µs): 10A to 12.4A (acceptable range)
- Power - Peak Pulse: 500W to 600W (acceptable range)
- Operating Temperature Range: -55°C to -65°C minimum; 150°C to 175°C maximum (acceptable range)
Substitute parts are grouped into two categories based on clamping voltage characteristics:
Group A (53.5V Clamping): Identical electrical performance to the original part
- SMBJ30E3/TR13 (Microchip Technology)
Group B (48.4V Clamping): Lower clamping voltage with higher peak pulse current
- SMBJ30A-E3/52 (Vishay General Semiconductor - Diodes Division)
- 1SMB30A TR13 (Central Semiconductor Corp)
- SMBJ30A (MDD)
- SMBJ30A-13-F (Diodes Incorporated)
- SMBJ30A-HR (Littelfuse Inc.)
- SMBJ30A-HRA (Littelfuse Inc.)
- SMBJ30A-TP-HF (Micro Commercial Co)
Group C (48.6V Clamping): Alternative clamping voltage with lower peak pulse current
- SACB30 (Littelfuse Inc.)
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ30-E3/52 | Vishay | 30V | 33.3V | 53.5V | 11.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Obsolete |
| SMBJ30E3/TR13 | Microchip Technology | 30V | 33.3V | 53.5V | 11.2A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A-E3/52 | Vishay | 30V | 33.3V | 48.4V | 12.4A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active |
| 1SMB30A TR13 | Central Semiconductor Corp | 30V | 33.3V | 48.4V | 12.4A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A | MDD | 30V | 33.3V | 48.4V | 12.4A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A-13-F | Diodes Incorporated | 30V | 33.3V | 48.4V | 12.4A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A-HR | Littelfuse Inc. | 30V | 33.3V | 48.4V | 12.4A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A-HRA | Littelfuse Inc. | 30V | 33.3V | 48.4V | 12.4A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active |
| SMBJ30A-TP-HF | Micro Commercial Co | 30V | 33.3V | 48.4V | 12.4A | 600W | -55°C ~ 175°C | DO-214AA, SMB | Active |
| SACB30 | Littelfuse Inc. | 30V | 33.3V | 48.6V | 10A | 500W | -55°C ~ 150°C | DO-214AA, SMB | Active |
Engineering Selection Recommendations
For Direct Replacement (Identical Electrical Performance): SMBJ30E3/TR13 from Microchip Technology provides identical clamping voltage (53.5V) and peak pulse current (11.2A) specifications. This part is in active production status and ROHS3 compliant. The extended operating temperature range (-65°C to 150°C) provides additional thermal margin compared to the original part.
For General-Purpose Applications (Group B - 48.4V Clamping): Parts in this group include SMBJ30A-E3/52 (Vishay), 1SMB30A TR13 (Central Semiconductor), SMBJ30A (MDD), SMBJ30A-13-F (Diodes Incorporated), SMBJ30A-HR (Littelfuse), SMBJ30A-HRA (Littelfuse), and SMBJ30A-TP-HF (Micro Commercial Co). All maintain the 30V reverse standoff voltage and 33.3V minimum breakdown voltage. The lower clamping voltage (48.4V) with increased peak pulse current (12.4A) is suitable for applications where the original 53.5V clamping specification is not a critical design constraint. All Group B parts are in active production and ROHS3 compliant.
For Constrained Power Budget Applications: SACB30 from Littelfuse Inc. offers 48.6V clamping voltage with 10A peak pulse current and 500W peak pulse power. This part is suitable for applications with lower transient energy requirements. It is in active production and ROHS3 compliant.
Temperature Considerations: Parts with extended temperature ranges (-65°C minimum or 175°C maximum) include SMBJ30E3/TR13, 1SMB30A TR13, SMBJ30A-HR, SMBJ30A-HRA, and SMBJ30A-TP-HF. These are appropriate for applications requiring operation beyond the standard -55°C to 150°C range.
Frequently Asked Questions (FAQ)
Q: Can SMBJ30A-E3/52 be used as a direct replacement for SMBJ30-E3/52? A: SMBJ30A-E3/52 maintains the same 30V reverse standoff voltage, 33.3V minimum breakdown voltage, and DO-214AA SMB package. The clamping voltage is 48.4V versus 53.5V on the original part, and peak pulse current is 12.4A versus 11.2A. This substitution is acceptable for general-purpose transient protection where the lower clamping voltage does not violate circuit design constraints.
Q: What is the difference between Group A and Group B substitutes? A: Group A (SMBJ30E3/TR13) maintains the original 53.5V clamping voltage and 11.2A peak pulse current. Group B parts (SMBJ30A variants and equivalents) feature 48.4V clamping voltage with 12.4A peak pulse current. Group A provides identical electrical performance; Group B provides lower clamping voltage with higher current capability.
Q: Are all substitute parts ROHS3 compliant? A: All substitute parts listed are ROHS3 compliant except SMBJ30A (MDD), which is listed as RoHS Compliant. All parts are REACH Unaffected and suitable for applications requiring environmental compliance.
Q: Does package type vary among substitutes? A: All substitute parts use the DO-214AA (SMB) package, maintaining mechanical and electrical compatibility with the original SMBJ30-E3/52 footprint.
Q: Which substitute offers the widest operating temperature range? A: SMBJ30A-TP-HF from Micro Commercial Co operates from -55°C to 175°C, providing the widest temperature range among all listed substitutes.
Q: Can SACB30 be used in place of SMBJ30-E3/52? A: SACB30 maintains the 30V reverse standoff voltage and 33.3V minimum breakdown voltage in the same DO-214AA SMB package. However, it features 48.6V clamping voltage and 10A peak pulse current with 500W peak pulse power. This substitution is suitable only for applications where the lower power rating and current capability do not exceed circuit requirements.
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