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Vishay General Semiconductor - Diodes Division SMBJ33C-E3/52
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- Part No.:
- SMBJ33C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33C-E3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,825
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Product details
Overview
SMBJ33C-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) 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 (VC) at 11.3 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ33C-E3/52 datasheet, SMBJ33C-E3/52 pinout, SMBJ33C-E3/52 application, or SMBJ33C-E3/52 equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VWM = 1.62), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown characteristics in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable avalanche performance, while low incremental surge resistance supports consistent clamping under repetitive transients.
The SMBJ33C-E3/52 delivers 53.3 V clamping at 11.3 A (10/1000 µs), with breakdown voltage VBR specified between 36.7 V (min) and 40.6 V (max) at 1 mA test current. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Ensures reliable turn-on margin above VWM; guarantees clamping activation within spec. |
| VC @ IPPM | 53.3 V at 11.3 A - Peak clamped voltage seen by protected circuit during 10/1000 µs transient; limits stress on downstream components. |
| PPPM | 600 W - Sustains high-energy surges (e.g., IEC 61000-4-5 Level 4) without failure; rated for 0.01% duty cycle. |
| IPPM | 11.3 A - Peak surge current handled at VC; derived from 600 W / 53.3 V; validates protection level for defined threat models. |
| TJ max | +150 °C - Enables use in high-temperature environments such as motor drives or outdoor telecom enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Polarity: unmarked for bidirectional types; no cathode/anode designation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Interchangeable terminals; identical clamping behavior in either direction - enables placement without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity testing up to Level 4 (4 kV line-to-line, 2 kV line-to-ground) without degradation. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 (260 °C peak reflow) | Eliminates pre-baking requirement for PCB assembly; simplifies manufacturing flow and reduces thermal stress on board. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and lifetime - essential for automotive and industrial field reliability. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants available - enables drop-in qualification for automotive ECUs requiring certified TVS protection. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protecting encoder feedback lines and gate driver control signals from switching-induced transients in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential RS-422 or PWM signal pairs to limit induced spikes to <53.3 V. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs and isolated gate drivers exposed to >1 kV fast transients. |
Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at connector entry point to shunt energy before reaching ASIC input protection networks. Use Value: Maintains signal integrity under 100 V/50 ms load dump events while staying within 33 V working range of 5 V sensor supply rails. |
| Telecom Power Feeds | Consumer USB-C ESD Protection |
|
Use Scenario: Safeguarding 48 V PoE-powered Ethernet PHYs and DC-DC converters against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary-level TVS on power input rail upstream of DC-DC stage, clamping common-mode transients before regulation. Use Value: Absorbs 600 W surge energy without thermal runaway, preserving converter startup sequencing and preventing brownout resets. |
Use Scenario: Secondary-level transient suppression on USB-C CC and VBUS lines in portable docking stations subjected to human-body-model (HBM) and system-level ESD. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp limiting VBUS overshoot during hot-plug events and CC line voltage excursions. Use Value: Complements integrated ESD diodes by handling higher-energy threats (>30 A IEC 61000-4-2 contact discharge) that exceed on-die capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-T | Same VWM, VBR, and VC specs; identical SMB package; T suffix denotes tape-and-reel packaging per Diodes Inc. standard. | No AEC-Q101 option; commercial-grade only; lacks Vishay's HE3/HM3 automotive qualification path. | Select when sourcing from Diodes Inc. distribution channels and automotive qualification is not required. |
| 1.5KE33CA | Higher PPPM (1500 W), larger DO-201 package (7.2 mm × 2.8 mm), slower response due to higher junction capacitance (~100 pF vs. ~20 pF). | Not suitable for high-speed data lines; requires larger PCB area; limited to lower-frequency power rail protection. | Choose only for legacy designs needing higher single-pulse energy absorption where board space permits larger through-hole or axial packages. |
Compared with SMBJ33C-E3/52, SMBJ33CA-T offers identical electrical performance in a functionally interchangeable package but lacks automotive qualification options, while 1.5KE33CA trades compactness and speed for higher pulse power - making SMBJ33C-E3/52 optimal for space-constrained, high-speed, or automotive-grade designs.
Availability
SMBJ33C-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C ESD protection requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMBJ33C-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and communications systems where board space, thermal performance, and surge robustness are critical.
FAQ
What is the clamping voltage of SMBJ33C-E3/52 under a 10/1000 µs surge?
The SMBJ33C-E3/52 clamps to a maximum of 53.3 V at its rated peak pulse current of 11.3 A under a 10/1000 µs waveform. This value is guaranteed across temperature and lifetime per Vishay's 88392 specification document, and reflects worst-case voltage seen by protected circuitry during standardized surge events.
Is SMBJ33C-E3/52 bidirectional or unidirectional?
SMBJ33C-E3/52 is a bidirectional TVS diode, indicated by the "C" suffix per Vishay's naming convention. It provides symmetrical clamping in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity - ideal for AC signal lines, differential buses, or circuits where polarity cannot be guaranteed.
Does SMBJ33C-E3/52 meet automotive qualification standards?
The base SMBJ33C-E3/52 is commercial-grade and RoHS-compliant, but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., SMBJ33CHE3). These variants undergo extended stress testing for automotive under-hood applications and are documented in the same datasheet family.
What is the maximum operating temperature for SMBJ33C-E3/52?
The SMBJ33C-E3/52 has a maximum junction temperature (TJ) rating of +150 °C, allowing reliable operation in high-temperature environments such as industrial motor controls, power supplies, and automotive engine compartments - provided PCB thermal design maintains junction-to-ambient resistance ≤100 °C/W.
How does the SMBJ33C-E3/52 compare to SMAJ33C in terms of power handling?
SMBJ33C-E3/52 delivers 600 W peak pulse power, whereas SMAJ33C (in smaller SMA package) is rated for 400 W. The SMB package's larger copper pad area and lower thermal resistance enable higher surge energy absorption - making SMBJ33C-E3/52 preferable for applications demanding robustness against repeated or high-amplitude transients.
SMBJ33C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ33C-E3/52 FAQ
1.How can I place an order for SMBJ33C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33C-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 SMBJ33C-E3/52 reliable?
The price and inventory of SMBJ33C-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 SMBJ33C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33C-E3/52?
SMBJ33C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33C-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 SMBJ33C-E3/52?
For technical support, including SMBJ33C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33C-E3/52 requirements.
6.How does Aetrix verify that SMBJ33C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33C-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 SMBJ33C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33C-E3/52?
All SMBJ33C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33C-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 SMBJ33C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ33C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33C-E3/52 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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