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Vishay General Semiconductor - Diodes Division SMBJ33A-M3/5B
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- Part No.:
- SMBJ33A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33A-M3/5B.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,093
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Product details
Overview
SMBJ33A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and lightning-induced surges 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ33A-M3/5B datasheet, SMBJ33A-M3/5B pinout, SMBJ33A-M3/5B application, or SMBJ33A-M3/5B equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 33 V, 150 °C max junction temperature, halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream ICs and MOSFETs. Its low incremental surge resistance and fast response time (<1 ns) ensure effective suppression of transients induced by inductive load switching and ESD events.
The SMBJ33A-M3/5B is rated for 600 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 53.3 V at 11.3 A - Clamping voltage limits stress on protected circuitry during 600 W surge events. |
| IPPM | 11.3 A - Peak pulse current capability with 10/1000 µs waveform; validated with derating above 25 °C ambient. |
| PPPM | 600 W - Peak pulse power handling capacity; supports repetitive surge events at ≤0.01% duty cycle. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive and industrial environments. |
| Leakage @ VWM | 1.0 µA - Low reverse leakage preserves power integrity in always-on circuits and battery-powered sensors. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Cathode indicated by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient conduction. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail or sensor signal); carries surge current into ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V DC lines without derating. |
| 10/1000 µs waveform compliance | Validated for standard lightning surge testing per ANSI/IEEE C62.35, ensuring interoperability with system-level immunity requirements. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance mandates for industrial and automotive OEMs without compromising thermal or electrical performance. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-related damage, eliminating bake-out steps in production. |
| 150 °C junction rating | Permits deployment in high-temperature zones such as engine control units and motor drive enclosures. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) from ESD and load dump transients in factory automation sensors. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between sensor output and microcontroller ADC input. Use Value: Limits voltage excursion to ≤53.3 V during 11.3 A surges, preventing ADC saturation and protecting internal ESD structures. | Use Scenario: Safeguarding LIN bus transceivers and power switches from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding BCM microcontrollers and driver ICs. Use Value: Clamps 33 V nominal rail to 53.3 V within nanoseconds, maintaining functional safety during ISO 7637-2 Pulse 5a events. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Input-stage surge protection for AC/DC adapters and PoE injectors exposed to lightning-induced surges on primary-side DC rails. IC Role / Device Role / Timing Role: First-line transient suppressor on +48 V or +57 V intermediate bus before DC/DC regulation. Use Value: Absorbs 600 W pulses without degradation, preserving upstream rectifier and downstream converter reliability. | Use Scenario: Protection of gate drivers and logic inputs in smart home appliance BLDC motor controllers subjected to commutation spikes. IC Role / Device Role / Timing Role: Localized clamp across half-bridge high-side driver supply pins. Use Value: Suppresses <100 ns ringing transients to ≤53.3 V, preventing false triggering and latch-up in level-shifted gate drivers. |
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-E3/5B | RoHS-compliant but not halogen-free; same electrical specs and SMB package. | No difference in circuit function or layout; differs only in material compliance profile. | Select when halogen-free requirement is not mandated and cost optimization is prioritized. |
| SMAJ33A-M3 | Lower 400 W peak pulse power; SMA (DO-214AC) package with smaller footprint and higher thermal resistance. | Not suitable for 600 W surge environments; requires revised PCB layout due to different pad dimensions and thermal pad area. | Choose only for space-constrained designs where 400 W rating suffices and thermal derating is acceptable. |
Compared with SMBJ33A-E3/5B, the SMBJ33A-M3/5B adds halogen-free compliance without electrical trade-offs; versus SMAJ33A-M3, it delivers 50% higher surge power handling and superior thermal dissipation in the larger SMB package - critical for automotive and industrial deployments requiring long-term reliability under repeated transients.
Availability
SMBJ33A-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMBJ33A-M3/5B 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 qualification readiness, and precise clamping performance are essential.
FAQ
What is the clamping voltage of SMBJ33A-M3/5B at its rated peak pulse current?
The SMBJ33A-M3/5B has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 11.3 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value ensures downstream components see no more than 53.3 V during worst-case transient events, making SMBJ33A-M3/5B suitable for protecting 33 V nominal systems with adequate safety margin.
Is SMBJ33A-M3/5B halogen-free and RoHS-compliant?
Yes, SMBJ33A-M3/5B is both halogen-free and RoHS-compliant, as confirmed by the "M3" suffix in its ordering code. This designation meets IEC 61249-2-21 requirements and is verified per Vishay's material categorization documentation (www.vishay.com/doc?99912). The SMBJ33A-M3/5B is appropriate for environmentally regulated markets including EU automotive and industrial equipment.
Can SMBJ33A-M3/5B be used in bidirectional applications?
No, SMBJ33A-M3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, the equivalent part is SMBJ33CA-M3/5B. Using SMBJ33A-M3/5B in bidirectional signal lines would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the maximum operating junction temperature for SMBJ33A-M3/5B?
The maximum operating junction temperature (TJ) for SMBJ33A-M3/5B is +150 °C, as specified in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392). This rating allows reliable operation in under-hood automotive locations and industrial enclosures without active cooling, provided PCB thermal design follows the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per terminal.
Does SMBJ33A-M3/5B meet AEC-Q101 qualification?
No, SMBJ33A-M3/5B is not AEC-Q101 qualified. It carries the commercial-grade "M3" suffix. For AEC-Q101 qualified versions, select SMBJ33A-HM3_X (e.g., SMBJ33A-HM3_B), which includes additional stress testing and traceability required for automotive applications. The SMBJ33A-M3/5B remains suitable for industrial and telecom uses where AEC-Q101 is not mandated.
SMBJ33A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ33A-M3/5B FAQ
1.How can I place an order for SMBJ33A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33A-M3/5B 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 SMBJ33A-M3/5B reliable?
The price and inventory of SMBJ33A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ33A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33A-M3/5B?
SMBJ33A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33A-M3/5B 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 SMBJ33A-M3/5B?
For technical support, including SMBJ33A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33A-M3/5B requirements.
6.How does Aetrix verify that SMBJ33A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ33A-M3/5B 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 SMBJ33A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ33A-M3/5B?
All SMBJ33A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33A-M3/5B, 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 SMBJ33A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ33A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33A-M3/5B Tags
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