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Vishay General Semiconductor - Diodes Division SMBJ33CA-E3/1
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- Part No.:
- SMBJ33CA-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33CA-E3/1.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,932
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Product details
Overview
SMBJ33CA-E3/1 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMBJ) package, designed for clamping voltage transients on signal or power lines. It features a 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage at 11.3 A peak pulse current, and 600 W peak pulse power dissipation with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ33CA-E3/1 datasheet, SMBJ33CA-E3/1 pinout, SMBJ33CA-E3/1 application, or SMBJ33CA-E3/1 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, RoHS-compliant construction, thermal resistance data, and real-world protection use cases - all aligned to Vishay's official 88392 specification document.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 36.7–40.6 V (min/max) under 1 mA test current. Its low clamping ratio (VC/VWM ≈ 1.62) and fast response time ensure effective suppression of transients induced by lightning, relay bounce, or motor commutation.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 53.3 V at 11.3 A - limits downstream voltage stress during 10/1000 μs surge events |
| PPPM | 600 W - peak transient energy absorption capability under standard waveform |
| TJ max. | +150 °C - enables deployment in under-hood automotive and industrial environments |
| MSL Level | Level 1 (260 °C peak reflow) - supports standard SMT assembly without moisture sensitivity concerns |
Pinout & Package
Package: DO-214AA (SMBJ), surface-mount, bi-directional configuration with no polarity marking - cathode band absent per Vishay specification for CA-suffix devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; tied to protected line or ground reference |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; tied to same node as anode in bi-directional layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Enhances long-term stability and leakage control under high-humidity or high-bias conditions |
| 600 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance when properly laid out |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
| RoHS-compliant, matte tin plating | Ensures solderability per J-STD-002 and JESD 22-B102, with whisker resistance (Class 1A) |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback lines in variable-frequency drives exposed to inductive kickback from 3-phase motors. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across DC bus or signal inputs to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to isolated gate drivers (e.g., Si823x) during 100 A+ turn-off surges. |
Use Scenario: Shielding LIN/CAN transceiver input pins and microcontroller ADC channels from load-dump and jump-start transients in body control modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bidirectional communication lines where polarity reversal occurs during fault conditions. Use Value: Maintains signal integrity below 53.3 V clamping level while surviving repetitive 10/1000 μs pulses per ISO 7637-2 Pulse 1/2/5a. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Input-stage surge suppression on -48 V DC telecom rectifier outputs feeding PoE injectors and remote PHYs. IC Role / Device Role / Timing Role: Standoff-rated protector between primary DC rail and downstream DC-DC converters handling sensitive Ethernet PHYs. Use Value: Withstands 600 W surges without degradation, preserving 33 V system margin while meeting GR-1089-CORE Level 3 requirements. |
Use Scenario: I/O line protection on washing machine main control boards subjected to relay coil flyback and user ESD events. IC Role / Device Role / Timing Role: Low-profile, automated-placement-compatible TVS bridging microcontroller GPIOs and front-panel switches or display connectors. Use Value: Enables compact PCB layout (DO-214AA footprint) and eliminates need for secondary board-level fusing in Class II appliances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CAHE3/52 | AEC-Q101 qualified variant with identical electrical specs; differs only in qualification traceability and packaging (reel vs cut tape) | Required for automotive OEM designs requiring full PPAP documentation and lot-level qualification records | Select SMBJ33CAHE3/52 when AEC-Q101 certification must be documented per part number, not just family |
| P6SMB33CA | Same DO-214AA package and 33 V VWM, but lower 600 W rating achieved with different chip design; VC = 53.3 V at 11.3 A matches SMBJ33CA-E3/1 exactly | Legacy industrial designs using older Vishay P6SMB series; compatible in footprint and function but lacks JESD 201 Class 1A whisker rating | Use P6SMB33CA only if existing BOM uses it and qualification updates are not mandated |
Compared with SMBJ33CAHE3/52, the SMBJ33CA-E3/1 offers identical protection performance but omits formal AEC-Q101 traceability - making it suitable for industrial and telecom applications where qualification documentation is not required. Against P6SMB33CA, SMBJ33CA-E3/1 provides enhanced process control and whisker resistance without sacrificing clamping behavior or layout compatibility.
Availability
SMBJ33CA-E3/1 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feeds requiring stable component supply, RoHS compliance, and proven surge resilience.
Supply support for SMBJ33CA-E3/1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series was developed for high-energy, surface-mount transient suppression in space-constrained, high-reliability systems - targeting automotive, industrial automation, and infrastructure equipment where failure modes must be rigorously controlled.
FAQ
What is the clamping voltage of SMBJ33CA-E3/1 at its rated peak pulse current?
The SMBJ33CA-E3/1 has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's Document Number 88392, Table on page 2.
Is SMBJ33CA-E3/1 suitable for automotive applications?
The SMBJ33CA-E3/1 is RoHS-compliant and built in an AEC-Q101-qualified process flow, but the specific part number SMBJ33CA-E3/1 is designated as commercial grade (E3 suffix). For certified automotive use, Vishay specifies SMBJ33CAHE3/52 - which carries the HE3 suffix denoting full AEC-Q101 qualification with traceable test reports. SMBJ33CA-E3/1 may be used in non-safety-critical automotive subsystems pending internal validation.
Does SMBJ33CA-E3/1 have polarity markings on the package?
No. As a bi-directional TVS diode, SMBJ33CA-E3/1 has no cathode band or polarity marking on the DO-214AA case - consistent with Vishay's specification stating "no marking on bi-directional types." Both terminals are functionally symmetric, and the device conducts equally during positive and negative transients.
What is the thermal resistance of SMBJ33CA-E3/1, and how does it affect PCB layout?
SMBJ33CA-E3/1 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must provide adequate copper area and avoid excessive trace length - especially critical in high-duty-cycle industrial applications.
Can SMBJ33CA-E3/1 replace SMBJ33A in a design?
No - SMBJ33A is uni-directional (cathode-marked, conducts only in reverse bias), while SMBJ33CA-E3/1 is bi-directional (no marking, conducts in both directions). Substituting SMBJ33CA-E3/1 for SMBJ33A would eliminate polarity-dependent blocking behavior and could cause unintended conduction in DC-biased circuits. Always verify directionality requirements before replacement.
SMBJ33CA-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional 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
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ33CA-E3/1 FAQ
1.How can I place an order for SMBJ33CA-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33CA-E3/1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ33CA-E3/1 reliable?
The price and inventory of SMBJ33CA-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33CA-E3/1 is usually 5 days.
3.What payment methods are accepted for SMBJ33CA-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33CA-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33CA-E3/1?
SMBJ33CA-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33CA-E3/1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ33CA-E3/1?
For technical support, including SMBJ33CA-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33CA-E3/1 requirements.
6.How does Aetrix verify that SMBJ33CA-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMBJ33CA-E3/1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ33CA-E3/1 meets industry standards.
7.What is the process for return or replacement of SMBJ33CA-E3/1?
All SMBJ33CA-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33CA-E3/1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ33CA-E3/1 part is unused and in its original packaging.
Return procedure for SMBJ33CA-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33CA-E3/1 Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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