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SMBJ33A-13 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SMBJ33A-13 is a unidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 33V reverse standoff voltage and 53.3V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ33A-13 |
| Manufacturer | Diodes Incorporated |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 33V |
| Voltage - Breakdown (Min) | 36.7V |
| Voltage - Clamping (Max) @ Ipp | 53.3V |
| Current - Peak Pulse (10/1000µs) | 11.3A |
| Power - Peak Pulse | 600W |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Product Status | Discontinued at DiGi Electronics |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ33A-13 are qualified based on the following critical electrical and mechanical parameters:
Electrical Compatibility Criteria:
- Voltage - Reverse Standoff (Typ): 33V
- Voltage - Breakdown (Min): 36.7V
- Voltage - Clamping (Max) @ Ipp: 53.3V
- Current - Peak Pulse (10/1000µs): 11.3A (minimum acceptable)
- Power - Peak Pulse: 600W
- Type: Zener, Unidirectional
Mechanical Compatibility Criteria:
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Substitute parts are grouped into two categories: direct electrical and mechanical equivalents (same voltage and current ratings in SMB package), and manufacturer-recommended alternatives that meet the same functional requirements with different package options or slightly different electrical characteristics within acceptable operating ranges.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package | Operating Temperature | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SMBJ33A-13 | Diodes Incorporated | 33V | 36.7V | 53.3V | 11.3A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Discontinued | RoHS non-compliant |
| SMBJ33A-13-F | Diodes Incorporated | 33V | 36.7V | 53.3V | 11.3A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active | ROHS3 Compliant |
| SMBJ33A | Good-Ark Semiconductor | 33V | 36.7V | 53.3V | 11.3A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active | ROHS3 Compliant |
| SMBJ33A-TP | Micro Commercial Co | 33V | 36.7V | 53.3V | 11.3A | 600W | DO-214AA, SMB | -55°C ~ 175°C | Active | ROHS3 Compliant |
| SMBJ33A-TR | STMicroelectronics | 33V | 36.7V | 53.3V | 11.8A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active | ROHS3 Compliant |
| P6SMB33A | Eaton - Electronics Division | 28.2V | 31.4V | 45.7V | 13.3A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active | RoHS Compliant |
| PTVS33VP1UP,115 | Nexperia USA Inc. | 33V | 36.7V | 53.3V | 11.3A | 600W | SOD-128 | -55°C ~ 150°C | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Direct Electrical and Mechanical Equivalents):
SMBJ33A-13-F (Diodes Incorporated), SMBJ33A (Good-Ark Semiconductor), SMBJ33A-TP (Micro Commercial Co), and SMBJ33A-TR (STMicroelectronics) are direct substitutes with identical voltage ratings (33V reverse standoff, 53.3V clamping) and current ratings (11.3A peak pulse) in the DO-214AA SMB package. All four are currently active products with ROHS3 compliance, addressing the RoHS non-compliance limitation of the discontinued SMBJ33A-13. SMBJ33A-TP offers an extended operating temperature range to 175°C compared to 150°C for other variants. SMBJ33A-TR from STMicroelectronics provides a marginally higher peak pulse current of 11.8A.
Alternative Package Option:
PTVS33VP1UP,115 (Nexperia USA Inc.) provides identical electrical specifications (33V reverse standoff, 53.3V clamping, 11.3A peak pulse) but in the SOD-128 package instead of SMB. This option is suitable only if PCB layout and assembly processes support SOD-128 surface mount components.
Not Recommended for Direct Substitution:
P6SMB33A (Eaton - Electronics Division) has different electrical characteristics with a lower reverse standoff voltage (28.2V) and lower clamping voltage (45.7V), making it unsuitable for applications requiring the 33V/53.3V specifications of the SMBJ33A-13.
Frequently Asked Questions (FAQ)
Q: Can SMBJ33A-13-F be used as a direct replacement for SMBJ33A-13?
A: Yes. SMBJ33A-13-F is electrically and mechanically identical to SMBJ33A-13, with the same voltage ratings (33V reverse standoff, 53.3V clamping), current rating (11.3A), and DO-214AA SMB package. The primary difference is that SMBJ33A-13-F is currently active and ROHS3 compliant, whereas SMBJ33A-13 is discontinued and RoHS non-compliant.
Q: What is the difference between SMBJ33A from different manufacturers?
A: SMBJ33A parts from Good-Ark Semiconductor, Micro Commercial Co, and STMicroelectronics all meet the same electrical specifications (33V reverse standoff, 53.3V clamping, 11.3A peak pulse) and use the DO-214AA SMB package. Micro Commercial Co's SMBJ33A-TP extends the operating temperature range to 175°C. STMicroelectronics' SMBJ33A-TR provides 11.8A peak pulse current. Selection depends on availability, supply chain preferences, and specific temperature or current requirements.
Q: Why is P6SMB33A listed as a substitute if it has different voltage ratings?
A: P6SMB33A is listed as a manufacturer-recommended alternative but is not a direct substitute. It has different electrical characteristics (28.2V reverse standoff versus 33V, 45.7V clamping versus 53.3V) and is suitable only for applications with lower voltage requirements. It should not be used in circuits designed for the SMBJ33A-13 specifications.
Q: Can PTVS33VP1UP,115 replace SMBJ33A-13 in existing designs?
A: PTVS33VP1UP,115 has identical electrical specifications but uses the SOD-128 package instead of DO-214AA SMB. Substitution is possible only if the PCB layout and assembly process can accommodate the SOD-128 package footprint. Electrical performance is equivalent.
Q: Are all substitute parts ROHS3 compliant?
A: All active substitute parts listed (SMBJ33A-13-F, SMBJ33A, SMBJ33A-TP, SMBJ33A-TR, and PTVS33VP1UP,115) are ROHS3 compliant. The original SMBJ33A-13 is RoHS non-compliant. P6SMB33A is RoHS compliant but not ROHS3 compliant.
Q: What is the difference between cut tape and tape & reel packaging?
A: Cut tape (CT) and tape & reel (TR) are different supply formats for the same component. Tape & reel is typically used for automated assembly processes and higher volume orders, while cut tape is used for smaller quantities or manual assembly. The electrical and mechanical specifications of the component remain identical regardless of packaging format.
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