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Vishay General Semiconductor - Diodes Division SMB8J33CAHM3/H
- Part No.:
- SMB8J33CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CAHM3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,653
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Product details
Overview
SMB8J33CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage at 15 A peak pulse current (IPPM), and 800 W peak pulse power rating (10/1000 μs waveform), making it suitable for automotive sensor interface protection per AEC-Q101.
For engineers reviewing the SMB8J33CAHM3/H datasheet, SMB8J33CAHM3/H pinout, SMB8J33CAHM3/H application, or SMB8J33CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetric suppression of positive and negative polarity surges without polarity sensitivity.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 72 °C/W) and RθJL = 20 °C/W support reliable power dissipation in compact PCB layouts with minimum recommended pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - Verified breakdown threshold ensures consistent turn-on across production lots and temperature range. |
| VC @ IPPM | 53.3 V at 15 A (10/1000 μs) - Clamping voltage limits downstream IC stress during 800 W surge events. |
| PPPM | 800 W - Peak pulse power handling capacity under standardized 10/1000 μs waveform; validates robustness against ISO 7637-2 Pulse 1/2/5a. |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics including ADAS sensors, body control modules, and infotainment interfaces. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No polarity marking required; terminals interchangeable-enables flexible PCB layout and eliminates orientation errors in automated placement. |
| Case (body) | Thermal and mechanical anchor | Plastic molding meets UL 94 V-0; solderable per J-STD-002; supports 260 °C reflow peak and JESD201 Class 2 whisker resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN FD, LIN, analog sensor outputs) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-reduces qualification effort for Tier 1 suppliers. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs; critical for safeguarding 3.3 V/5 V logic inputs and precision ADC front-ends. |
| MSL Level 1 rating | Eliminates bake-out requirement prior to reflow; supports just-in-time manufacturing and reduces moisture-related assembly defects. |
| Halogen-free (HM3 suffix) | Meets automotive OEM environmental mandates (e.g., GMW3172, Ford WSS-M99P1111-A) and simplifies end-of-life material reporting. |
Applications
| Automotive Sensor Interface | Industrial Analog Signal Line |
|---|---|
Use Scenario: Protection of 24 V supply and signal lines in wheel speed sensors and pressure transducers exposed to load dump and ISO 16750-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to divert surge energy before reaching ASIC or microcontroller input pins. Use Value: Withstands 800 W surges while clamping below 54 V, preventing latch-up or gate oxide damage in automotive-grade MCUs and analog front-ends. |
Use Scenario: Surge protection on 4–20 mA current loop inputs in PLC I/O modules subjected to field wiring transients and lightning-induced coupling. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across loop terminals, operating in parallel with precision current-sense circuitry without affecting DC accuracy. Use Value: 1.0 μA leakage at 33 V ensures minimal error contribution (<0.005% FS) in high-resolution current measurement paths. |
| Automotive Body Control Module | Consumer Appliance Motor Driver |
Use Scenario: Input protection for LIN bus transceivers and window lift motor drivers in BCMs facing battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail and LIN data line, coordinated with internal IC ESD structures to extend system-level immunity. Use Value: AEC-Q101 qualification and 150 °C TJ max allow direct integration into sealed BCM housings without thermal derating. |
Use Scenario: Protection of gate drive signals and feedback paths in BLDC motor inverters used in washing machines and HVAC fans. IC Role / Device Role / Timing Role: Fast-response shunt element across optocoupler inputs and current-sense amplifier rails to suppress MOSFET switching noise and back-EMF spikes. Use Value: 53.3 V clamping voltage prevents false triggering of overcurrent protection while maintaining >10 V noise margin for 3.3 V logic interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J33CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable for commercial-automotive hybrids where halogen content is not mandated. | Select when cost sensitivity outweighs OEM halogen-free requirements. |
| SMAJ33CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or load dump scenarios. | Choose only for space-constrained consumer applications with sub-400 W surge requirements. |
Compared with SMB8J33CAHE3/H, the SMB8J33CAHM3/H adds halogen-free compliance without sacrificing surge rating or thermal performance; versus SMAJ33CA, it delivers double the pulse power handling and superior thermal dissipation in the same footprint family-critical for automotive and industrial reliability.
Availability
SMB8J33CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 4–20 mA loops, body control modules, and appliance motor driver designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J33CAHM3/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant surge protection in harsh automotive and industrial environments with stringent environmental and thermal demands.
FAQ
What is the clamping voltage of SMB8J33CAHM3/H at its rated peak pulse current?
The SMB8J33CAHM3/H has a maximum clamping voltage (VC) of 53.3 V at 15 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for protected downstream circuitry in the SMB8J33CAHM3/H application space.
Is SMB8J33CAHM3/H suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB8J33CAHM3/H is explicitly AEC-Q101 qualified, as confirmed in the Vishay document 88422. The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction-making SMB8J33CAHM3/H appropriate for under-hood and chassis-mounted automotive systems including ADAS sensors and body control modules.
How does the bidirectional configuration of SMB8J33CAHM3/H affect its PCB layout?
The SMB8J33CAHM3/H is bidirectional with no polarity marking, so either terminal may connect to line or return-eliminating orientation constraints during automated placement. This symmetry simplifies routing in differential or floating interfaces (e.g., LIN, CAN, analog sensors) and avoids costly rework due to incorrect orientation, unlike unidirectional TVS diodes such as SMB10J33A.
What is the maximum operating temperature for SMB8J33CAHM3/H?
The SMB8J33CAHM3/H has a specified operating junction temperature range of -55 °C to +150 °C. This allows reliable operation in high-temperature automotive environments (e.g., engine compartments) and industrial enclosures without thermal derating, provided the PCB uses the recommended 0.2" × 0.2" copper pads per terminal to maintain RθJA ≤ 72 °C/W.
Does SMB8J33CAHM3/H meet lead-free and halogen-free compliance standards?
Yes, the HM3 suffix in SMB8J33CAHM3/H indicates halogen-free, RoHS-compliant construction per JEDEC JS709 and IPC-1752. It contains no brominated flame retardants or chlorine-based compounds, satisfying strict environmental requirements for automotive OEMs (e.g., BMW GS95024, VW TL813) and industrial sustainability programs.
SMB8J33CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J33CAHM3/H FAQ
1.How can I place an order for SMB8J33CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CAHM3/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 SMB8J33CAHM3/H reliable?
The price and inventory of SMB8J33CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J33CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMB8J33CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CAHM3/H?
SMB8J33CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CAHM3/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 SMB8J33CAHM3/H?
For technical support, including SMB8J33CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CAHM3/H requirements.
6.How does Aetrix verify that SMB8J33CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J33CAHM3/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 SMB8J33CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMB8J33CAHM3/H?
All SMB8J33CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CAHM3/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 SMB8J33CAHM3/H part is unused and in its original packaging.
Return procedure for SMB8J33CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J33CAHM3/H Tags
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