My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ33AHM3_B/H
- Part No.:
- SMBJ33AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AHM3_B/H.pdf
- Description:
- 600W,33V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,785
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ33AHM3_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, and 600 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and telecom systems.
For engineers reviewing the SMBJ33AHM3_B/H datasheet, SMBJ33AHM3_B/H pinout, SMBJ33AHM3_B/H application, or SMBJ33AHM3_B/H equivalent, key selection criteria include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, halogen-free RoHS-compliant construction (HM3 suffix), and AEC-Q101 qualification suitability for automotive-grade designs requiring reliable surge immunity.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds VBR. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of sub-microsecond transients induced by inductive load switching or lightning surges.
The SMBJ33AHM3_B/H uses a glass-passivated silicon junction housed in an SMB (DO-214AA) package rated for 100 °C/W junction-to-ambient thermal resistance. It supports repetitive surge duty cycle of 0.01 % and meets MSL level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche onset range defining protection threshold |
| VC @ IPPM | 53.3 V at 11.3 A - clamped voltage during 600 W transient, limiting stress on downstream components |
| IPPM | 11.3 A - peak pulse current capability with 10/1000 µs waveform, defining surge handling capacity |
| PPPM | 600 W - peak pulse power dissipation, enabling protection against high-energy transients |
| TJ max | +150 °C - maximum junction temperature, supporting operation in harsh thermal environments |
| Leakage @ VWM | 1.0 µA - minimal reverse leakage ensures negligible standby power loss and signal integrity |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity is unidirectional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Current exit terminal under forward bias; marked end | Connected to protected line (e.g., I/O, power rail) - conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable suppression of high-energy transients without degradation across multiple events |
| Glass-passivated chip junction | Ensures stable VBR and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and body electronics |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements |
| Low profile SMB package (DO-214AA) | Reduces PCB footprint while maintaining thermal performance via 5.0 mm × 5.0 mm copper pad layout |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from relay and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power rails and signal lines to clamp transients below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces with <53.3 V clamping at 11.3 A surge current. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs (e.g., ambient temperature, door position) from load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing >600 W pulses while maintaining <1 µA leakage to avoid signal distortion. Use Value: Enables AEC-Q101-compliant design without additional filtering or derating due to verified automotive qualification. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for AC/DC adapters and PoE-powered devices exposed to lightning-induced surges on primary-side DC rails. IC Role / Device Role / Timing Role: Primary clamping element shunting surge energy to ground before it reaches downstream regulators and controllers. Use Value: Delivers 53.3 V clamping at 33 V nominal rail - sufficient margin above 24 V system voltage while avoiding false triggering. |
Use Scenario: Overvoltage protection for microcontroller GPIOs connected to pushbuttons, displays, and motor feedback sensors in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA), fast-response TVS ensuring no impact on capacitive touch sensing or analog sensor accuracy. Use Value: Halogen-free HM3 construction meets global environmental compliance requirements without sacrificing surge performance. |
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_B/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial equipment where automotive qualification is unnecessary | Select when halogen-free content or automotive qualification is not required; lower cost alternative |
| SMBJ33CAHM3_B/H | Bidirectional variant with same VWM (33 V), symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, audio) where polarity reversal may occur | Choose only if bidirectional protection is needed - not a drop-in replacement due to polarity and circuit topology differences |
Compared with SMBJ33AHM3_B/H, the HE3 variant trades halogen-free and AEC-Q101 compliance for cost efficiency in non-automotive settings, while the CAHM3 variant changes protection topology entirely - making SMBJ33AHM3_B/H the optimal choice for unidirectional DC rail and signal line protection in automotive and high-reliability industrial designs.
Availability
SMBJ33AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ33AHM3_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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems demanding AEC-Q101 qualification and robust surge immunity.
FAQ
What is the clamping voltage of SMBJ33AHM3_B/H at its rated peak pulse current?
The SMBJ33AHM3_B/H has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 88392, page 2. The SMBJ33AHM3_B/H maintains this clamping performance across its specified operating temperature range.
Is SMBJ33AHM3_B/H suitable for automotive applications?
Yes, SMBJ33AHM3_B/H is AEC-Q101 qualified (as indicated by the HM3 suffix) and specifically designed for automotive use cases including body control modules, infotainment power supplies, and sensor interface protection. Its halogen-free, RoHS-compliant construction and MSL Level 1 reflow compatibility meet stringent automotive manufacturing requirements. The SMBJ33AHM3_B/H qualification is documented in Vishay's ordering information table on page 3 of datasheet 88392.
What does the "HM3" suffix mean in SMBJ33AHM3_B/H?
The "HM3" suffix in SMBJ33AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS-compliant only) and HE3 (RoHS-compliant + AEC-Q101, but not halogen-free). The "B/H" indicates packaging in 7″ tape-and-reel format (750 units per reel). This coding is defined in Vishay's ordering information section on page 3 of datasheet 88392.
How does SMBJ33AHM3_B/H differ from SMBJ33AHE3_B/H?
SMBJ33AHM3_B/H and SMBJ33AHE3_B/H share identical electrical specs (VWM = 33 V, VC = 53.3 V, PPPM = 600 W) but differ in material compliance: HM3 is halogen-free and AEC-Q101 qualified, while HE3 is RoHS-compliant and AEC-Q101 qualified but contains halogens. Both use the same SMB package and mounting footprint. The distinction is critical for automotive Tier 1 suppliers requiring halogen-free BOMs - SMBJ33AHM3_B/H satisfies that requirement where SMBJ33AHE3_B/H does not.
What is the maximum reverse leakage current for SMBJ33AHM3_B/H at its stand-off voltage?
The SMBJ33AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 33 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power loss and avoids interference with high-impedance sensor circuits or battery-powered systems. The value is specified in the Electrical Characteristics table on page 2 of Vishay datasheet 88392 under the "MAXIMUM REVERSE LEAKAGE AT VWM" column for the SMBJ33A row.
SMBJ33AHM3_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)
SMBJ33AHM3_B/H FAQ
1.How can I place an order for SMBJ33AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AHM3_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 SMBJ33AHM3_B/H reliable?
The price and inventory of SMBJ33AHM3_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 SMBJ33AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ33AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AHM3_B/H?
SMBJ33AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AHM3_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 SMBJ33AHM3_B/H?
For technical support, including SMBJ33AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ33AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ33AHM3_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 SMBJ33AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ33AHM3_B/H?
All SMBJ33AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AHM3_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 SMBJ33AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ33AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33AHM3_B/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
