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Vishay General Semiconductor - Diodes Division SMBJ33AHE3_B/H
- Part No.:
- SMBJ33AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AHE3_B/H.pdf
- Description:
- 600W,33V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
SMBJ33AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.3 V clamping voltage (VC) at 11.3 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ33AHE3_B/H datasheet, SMBJ33AHE3_B/H pinout, SMBJ33AHE3_B/H application, or SMBJ33AHE3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and RoHS-compliant packaging details - all critical for surge immunity validation and long-term reliability planning.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp during transient events, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 1.0 µA maximum reverse leakage at VWM ensures minimal standby power loss in always-on circuits.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. AEC-Q101 qualification confirms suitability for automotive under-hood applications requiring extended temperature cycling and mechanical shock resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; validates protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; completes clamping loop during positive transients. |
| Cathode | High-side protected node | Connected to line being protected (e.g., 33 V supply rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy lightning-induced surges per IEC 61000-4-5. |
| AEC-Q101 qualified | Validates reliability for automotive powertrain and body control modules without additional qualification effort. |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture sensitivity concerns or baking requirements. |
| Low 1.0 µA ID at VWM | Minimizes quiescent current draw in battery-powered systems and avoids false triggering in precision analog circuits. |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
Use Scenario: Protection of 33 V auxiliary power rail against inductive kickback from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt TVS clamping transient spikes within 1 ns to limit voltage seen by MCU power pins and CAN transceivers. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V logic supplies while maintaining <1.0 µA leakage at nominal 33 V operation. |
Use Scenario: Surge suppression on 33 V sensor supply line feeding oxygen and knock sensors in engine bay. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing load dump and ISO 7637-2 Pulse 5a transients up to 600 W. Use Value: Enables AEC-Q101-compliant design without external heatsinking due to RθJA = 100 °C/W and TJ max. = +150 °C. |
| Telecom Power Interfaces | Industrial PLC I/O Modules |
Use Scenario: Input protection for 33 V DC-DC converter front-end in outdoor base station power supplies. IC Role / Device Role / Timing Role: Primary overvoltage defense against lightning-induced surges coupled via AC mains or Ethernet lines. Use Value: Delivers 53.3 V clamping at 11.3 A, ensuring downstream converters remain below absolute maximum ratings during 10/1000 µs events. |
Use Scenario: Protection of 33 V fieldbus communication lines (e.g., Profibus PA) against ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp minimizing signal distortion on 1 Mbps+ digital interfaces. Use Value: Maintains signal integrity with <100 pF junction capacitance (typ.) at zero bias, verified per Fig. 4 in datasheet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct material substitution when halogen-free sourcing is required; same footprint and thermal performance. |
| SMBJ33A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM, but rated only for −55 to +150 °C without automotive qualification testing. | Suitable for industrial or consumer applications where automotive reliability validation is not required. | Cost-optimized alternative for non-automotive designs; verify system-level reliability testing if used in harsh environments. |
Compared with SMBJ33AHE3_B/H, the HM3 variant adds halogen-free compliance without altering protection performance, while the E3/52 version removes AEC-Q101 validation - making it viable for cost-sensitive industrial use but unsuitable for automotive safety-critical nodes without additional qualification.
Availability
SMBJ33AHE3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, and telecom power interfaces requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ33AHE3_B/H 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 performance.
The SMBJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching surges is mission-critical.
FAQ
What is the clamping voltage of SMBJ33AHE3_B/H at its rated peak pulse current?
The SMBJ33AHE3_B/H has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMBJ33AHE3_B/H qualified for automotive applications?
Yes, SMBJ33AHE3_B/H is AEC-Q101 qualified, as confirmed in the "Ordering Information" section (page 3) and "Features" list of Vishay document 88392. This qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness - validating its use in automotive engine control units, body electronics, and ADAS power domains without additional component-level qualification.
What is the thermal resistance of SMBJ33AHE3_B/H, and how does it affect layout design?
SMBJ33AHE3_B/H 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. This value requires PCB designers to allocate adequate copper area and avoid excessive trace length between the device and ground plane - especially in high-duty-cycle surge environments - to prevent junction temperature from exceeding +150 °C during repetitive transient events.
Does SMBJ33AHE3_B/H have polarity marking, and how is it identified?
Yes, SMBJ33AHE3_B/H is unidirectional and features a cathode band marking on the SMB (DO-214AA) package body. As stated in the "Mechanical Data" section, "for unidirectional types the band denotes cathode end." This band must be oriented toward the higher-potential side (e.g., 33 V rail) to ensure proper clamping action - incorrect orientation renders the device ineffective against positive transients.
What is the maximum reverse leakage current of SMBJ33AHE3_B/H at its stand-off voltage?
The SMBJ33AHE3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 33 V stand-off voltage (VWM), specified in the "Electrical Characteristics" table on page 2 of Vishay document 88392. This ultra-low leakage supports energy-efficient designs in battery-backed systems and prevents unintended loading of precision voltage references or high-impedance sensor inputs.
SMBJ33AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ33AHE3_B/H FAQ
1.How can I place an order for SMBJ33AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AHE3_B/H 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 SMBJ33AHE3_B/H reliable?
The price and inventory of SMBJ33AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ33AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AHE3_B/H?
SMBJ33AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AHE3_B/H 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 SMBJ33AHE3_B/H?
For technical support, including SMBJ33AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ33AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ33AHE3_B/H 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 SMBJ33AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ33AHE3_B/H?
All SMBJ33AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AHE3_B/H, 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 SMBJ33AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ33AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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