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Vishay General Semiconductor - Diodes Division SMBJ33AHM3_A/H
- Part No.:
- SMBJ33AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AHM3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SMBJ33AHM3_A/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 DC power rails 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 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 motor drives to protect MOSFET gate drivers from inductive switching transients.
For engineers reviewing the SMBJ33AHM3_A/H datasheet, SMBJ33AHM3_A/H pinout, SMBJ33AHM3_A/H application, or SMBJ33AHM3_A/H equivalent, this page delivers verified electrical specs, thermal behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world design context for ESD/surge protection in automotive-grade and industrial control systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging glass-passivated junction technology for stable avalanche performance and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) support reliable operation under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads.
The SMBJ33AHM3_A/H meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow peak temperature. With 1.0 µA maximum reverse leakage at VWM and 0.100 %/°C VBR temperature coefficient, it maintains precise clamping stability across -55 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe DC rail operating margin. |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage limits downstream IC stress during 600 W 10/1000 µs surge events. |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000 µs waveform, enabling protection against lightning-induced surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating supports high-energy inductive kickback absorption. |
| TJ max. | +150 °C - Maximum junction temperature allows deployment in under-hood automotive and high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - Low-profile SMT footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with automated placement and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by band marking. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, qualified to JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; forms clamping path during positive transients on cathode side. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 33 V supply rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability under thermal cycling and vibration. |
| Halogen-free, RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 1 material requirements for green manufacturing. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports standard lead-free assembly processes without moisture-related popcorning risk. |
| Low 1.0 µA leakage at VWM | Minimizes standby power loss in battery-powered systems and avoids false triggering in high-impedance sensor interfaces. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 33 V auxiliary power rail feeding microcontroller I/O and CAN transceivers against load-dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly at power entry point before LDO regulator input. Use Value: Limits transient voltage to ≤53.3 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic circuitry downstream. |
Use Scenario: Surge suppression on LIN bus lines exposed to battery transients during vehicle jump-start or alternator load dump. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN data line and chassis ground, referenced to local GND plane. Use Value: Maintains signal integrity below 53.3 V clamping level while preserving <1.0 µA leakage to avoid LIN bias current violation. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection of 33 V DC-DC converter in PoE-powered network switches subjected to Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side 33 V output rail, coordinated with upstream fuse and common-mode choke. Use Value: Absorbs 600 W surge energy within 1000 µs, reducing need for multi-stage protection and minimizing board space. |
Use Scenario: Overvoltage safeguard for 33 V fan controller IC in smart HVAC units experiencing relay contact bounce and transformer flyback. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to fan driver MOSFET source terminal to minimize loop inductance. Use Value: Achieves sub-100 ns response time and clamps transients before gate oxide damage occurs in N-channel power FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (non-halogen-free, non-AEC-Q101). | Lacks automotive qualification and halogen-free certification; suitable only for non-automotive industrial/commercial use. | Select when AEC-Q101 and halogen-free requirements are not mandated, and cost optimization is prioritized. |
| SMCJ33A-HF | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC ratings. | Requires larger PCB footprint and higher thermal mass; used where higher surge margin or legacy SMC layout exists. | Choose when system-level surge testing exceeds 600 W or existing board design uses SMC footprint. |
Compared with SMBJ33AHM3_A/H, the SMBJ33AHE3_A/H offers identical protection performance without halogen-free or automotive qualification, while the SMCJ33A-HF provides double the surge power rating at the cost of increased size and thermal inertia - making SMBJ33AHM3_A/H optimal for space-constrained AEC-Q101-compliant designs needing exact 600 W capability.
Availability
SMBJ33AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ33AHM3_A/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ33AHM3_A/H at its rated peak pulse current?
The SMBJ33AHM3_A/H has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ33AHM3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding thermal environments.
Is SMBJ33AHM3_A/H qualified for automotive applications?
Yes, SMBJ33AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101). It undergoes stress testing including temperature cycling, humidity bias, mechanical shock, and accelerated life testing to meet automotive reliability standards. This qualification makes SMBJ33AHM3_A/H suitable for under-hood and body electronics applications where failure modes must be rigorously controlled.
What is the reverse leakage current specification for SMBJ33AHM3_A/H at its stand-off voltage?
The SMBJ33AHM3_A/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its 33 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage minimizes quiescent power loss and prevents interference with high-impedance sensing circuits. At elevated temperatures, leakage remains well below 10 µA up to +125 °C, supporting stable operation in thermally stressed designs.
Does SMBJ33AHM3_A/H support lead-free reflow assembly?
Yes, SMBJ33AHM3_A/H is rated for lead-free reflow with a maximum peak temperature of 260 °C, compliant with J-STD-020 and classified as MSL Level 1. Its matte tin-plated terminals meet JESD 22-B102 solderability requirements, and the molding compound passes UL 94 V-0 flammability testing. No pre-bake is required prior to reflow, simplifying manufacturing flow for high-volume SMT lines.
How does the thermal resistance of SMBJ33AHM3_A/H affect its surge handling capability?
SMBJ33AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values determine how quickly heat dissipates during repetitive surge events. When mounted on 5.0 mm × 5.0 mm copper pads per Vishay's recommended layout, the device sustains its 600 W peak pulse rating without thermal runaway. Derating curves in Figure 2 show that at 100 °C ambient, the usable PPPM reduces to ~420 W - a critical design consideration for enclosed or high-temperature deployments.
SMBJ33AHM3_A/H 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:
- 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)
SMBJ33AHM3_A/H FAQ
1.How can I place an order for SMBJ33AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AHM3_A/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 SMBJ33AHM3_A/H reliable?
The price and inventory of SMBJ33AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ33AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AHM3_A/H?
SMBJ33AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AHM3_A/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 SMBJ33AHM3_A/H?
For technical support, including SMBJ33AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ33AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ33AHM3_A/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 SMBJ33AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ33AHM3_A/H?
All SMBJ33AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AHM3_A/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 SMBJ33AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ33AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33AHM3_A/H Tags
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