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Vishay General Semiconductor - Diodes Division SMBJ33-E3/52
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- Part No.:
- SMBJ33-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33-E3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,180
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Product details
Overview
SMBJ33-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.3 V maximum clamping voltage (VC) at 11.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed for protecting MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ33-E3/52 datasheet, SMBJ33-E3/52 pinout, SMBJ33-E3/52 application, or SMBJ33-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when reverse voltage exceeds VBR, it avalanches to clamp transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling consistent clamping across repetitive surges at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports surge immunity per ANSI/IEEE C62.35. Its unidirectional configuration requires cathode-band orientation during layout, with no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before significant leakage begins; defines safe DC/AC working margin. |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 53.3 V at 11.3 A - clamped voltage seen by protected circuit during full-rated 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - peak transient power absorption capability; validated with standardized 10/1000 µs waveform. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at stand-off voltage; preserves signal integrity and minimizes standby power loss. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on recommended 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| Polarity | Unidirectional - cathode identified by band; blocks forward conduction, conducts only during reverse overvoltage events. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line's lower-potential side (e.g., ground or return); completes clamping loop during transient. |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line's higher-potential side (e.g., VCC or signal); avalanche initiates here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (e.g., 4 kV/2 Ω) without degradation under specified duty cycle. |
| Fast response time (<1 ps) | Clamps transients before sensitive ICs experience damaging overvoltage; critical for high-speed data and power MOSFET gate protection. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across temperature and humidity; improves reliability in harsh industrial environments. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn effect; eliminates pre-bake requirement for standard SMT assembly. |
| RoHS-compliant, commercial grade | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU; suitable for consumer, telecom, and industrial applications. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of IGBT gate drivers and DC bus monitoring circuits against switching-induced voltage spikes. IC Role / Device Role / Timing Role: Shunt clamping element placed across gate-source or supply-rail nodes to limit transient overvoltage. Use Value: Limits gate voltage to ≤53.3 V during 11.3 A surge, preventing IGBT latch-up or oxide breakdown while maintaining system uptime. |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppressor on secondary-side DC distribution rails feeding PoE controllers and PHY ICs. Use Value: Clamps 600 W surges within 10/1000 µs envelope to protect downstream DC-DC converters rated for ≤55 V input max. |
| Automotive Body Control Modules | Industrial Sensor Interfaces |
|
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground to absorb negative-going transients. Use Value: Withstands 100 A IFSM (8.3 ms half-sine), enabling resilience against battery-reversal and alternator dump events per ISO 7637-2. |
Use Scenario: ESD and surge protection on 4–20 mA current-loop sensor inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-clamp device bridging analog input and isolation barrier to divert transients before signal conditioning stage. Use Value: Maintains ≤1.0 µA leakage at 33 V, preserving loop accuracy; clamps EFT bursts to <53.3 V without affecting 4–20 mA calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Same electrical specs and package; identical marking code "MM" and VBR range (36.7–40.6 V); E3/52 tape-and-reel packaging matches exactly. | No functional difference; SMBJ33A-E3/52 is the base-series designation aligned with Vishay's official part numbering - SMBJ33-E3/52 is a legacy or alternate label for same device. | Select SMBJ33A-E3/52 for guaranteed alignment with Vishay's current datasheet revision and distributor inventory. |
| SMCJ33A-E3/57T | Higher power rating (1500 W vs. 600 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs; RθJA = 35 °C/W vs. 100 °C/W. | Used where higher single-event energy handling is required (e.g., primary AC input stages); not drop-in due to larger footprint and thermal pad requirements. | Choose only if system-level surge testing exceeds 600 W; requires PCB layout change and thermal validation. |
Compared with SMBJ33A-E3/52 (identical function and form), SMBJ33-E3/52 is a documented variant with matching specs but less explicit traceability in current Vishay catalogs; versus SMCJ33A-E3/57T, it trades power headroom for compact SMB footprint and simplified thermal management on space-constrained boards.
Availability
SMBJ33-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor interfaces requiring stable component supply and repeatable surge protection performance.
Supply support for SMBJ33-E3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series targets board-level transient suppression in space-constrained, high-volume applications - engineered for fast clamping, low leakage, and seamless integration into automated SMT lines across industrial, telecom, and automotive sectors.
FAQ
What is the maximum clamping voltage of SMBJ33-E3/52 under rated surge conditions?
The SMBJ33-E3/52 has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 11.3 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 53.3 V during full-power transient events. The SMBJ33-E3/52 maintains this clamping performance across its qualified operating temperature range of -55 °C to +150 °C.
Is SMBJ33-E3/52 RoHS-compliant and lead-free compatible?
Yes, the SMBJ33-E3/52 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and compatibility with lead-free reflow soldering processes up to 260 °C peak temperature (MSL Level 1 per J-STD-020). Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability standards, and whisker resistance is certified to JESD 201 Class 2.
How does SMBJ33-E3/52 differ from bidirectional SMBJ33CA variants?
The SMBJ33-E3/52 is unidirectional, featuring a cathode band for polarity-sensitive placement and blocking forward conduction; the SMBJ33CA variant is bidirectional with symmetrical clamping in both directions and no polarity marking. Their VWM (33 V), VBR (36.7–40.6 V), and VC (53.3 V) match, but SMBJ33-E3/52 must be oriented correctly in-circuit, whereas SMBJ33CA can be placed without regard to direction - critical for AC-coupled or differential signal lines.
What is the thermal resistance and how does it affect SMBJ33-E3/52 derating?
The SMBJ33-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This means power dissipation must be derated linearly above 25 °C ambient - for example, at 75 °C ambient, maximum allowable continuous power drops to 2.5 W (5.0 W × [1 − (75−25)/125]). Derating curves are provided in Figure 2 of the Vishay datasheet 88392.
Can SMBJ33-E3/52 be used in automotive applications?
The standard SMBJ33-E3/52 is commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like SMBJ33HE3_X (e.g., SMBJ33HE3_B/H). These automotive-grade variants undergo additional stress testing for temperature cycling, humidity, and mechanical shock. For non-safety-critical body electronics (e.g., lighting controls), the commercial SMBJ33-E3/52 may be used - but design validation per ISO 16750 and qualification to AEC-Q101 is required for full automotive deployment.
SMBJ33-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- 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)
SMBJ33-E3/52 FAQ
1.How can I place an order for SMBJ33-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33-E3/52 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 SMBJ33-E3/52 reliable?
The price and inventory of SMBJ33-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33-E3/52?
SMBJ33-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33-E3/52 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 SMBJ33-E3/52?
For technical support, including SMBJ33-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33-E3/52 requirements.
6.How does Aetrix verify that SMBJ33-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33-E3/52 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 SMBJ33-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33-E3/52?
All SMBJ33-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33-E3/52, 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 SMBJ33-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ33-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33-E3/52 Tags
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