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Vishay General Semiconductor - Diodes Division SMBJ75CAHM3_B/H
- Part No.:
- SMBJ75CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHM3_B/H.pdf
- Description:
- 600W,75V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,579
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Product details
Overview
SMBJ75CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 5.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ75CAHM3_B/H datasheet, SMBJ75CAHM3_B/H pinout, SMBJ75CAHM3_B/H application, or SMBJ75CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, 121 V VC under 5.0 A surge, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (HM3 suffix), and AEC-Q101 qualification readiness - critical for automotive-grade transient protection design validation.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, conducting when reverse voltage exceeds VBR and limiting downstream voltage to ≤121 V at 5.0 A. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 75 V), while the bidirectional architecture eliminates polarity dependency in AC-coupled or floating signal paths.
The SMBJ75CAHM3_B/H delivers 600 W peak pulse power handling per 10/1000 μs waveform with <1 ns response time and 0.106 %/°C VBR temperature coefficient. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, enabling reliable operation up to +150 °C junction temperature without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1.0 mA - guaranteed conduction onset range; ensures predictable turn-on across temperature and unit variation |
| VC (Clamping Voltage) | 121 V at IPPM = 5.0 A - peak voltage seen by protected circuit during 10/1000 μs surge; determines minimum IC withstand rating required |
| PPPM (Peak Pulse Power) | 600 W - surge energy absorption capacity under standardized 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 transients |
| ID (Reverse Leakage) | ≤1.0 μA at 75 V - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max. | +150 °C - enables use in under-hood automotive modules and industrial motor drives with elevated ambient temperatures |
| Package | SMB (DO-214AA) - 0.205" × 0.130" footprint compatible with automated SMT placement; meets UL 94 V-0 flammability |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no DC bias directionality required |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; device functions identically regardless of orientation in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential pairs, and floating buses without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (4 kV/2 Ω) without degradation |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies manufacturing logistics |
| Halogen-free & RoHS-compliant (HM3) | Meets IPC-1752A material declaration requirements and EU environmental compliance mandates |
| AEC-Q101 qualification ready | Base HM3 suffix supports automotive qualification path; qualified variants available as SMBJ75CAHM3_X |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across relay coil or between MCU GPIO and external switch node. Use Value: Limits transient voltage to ≤121 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic interfaces. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated clamp on 12 V power rail or LIN physical layer, operating continuously at 75 V VWM. Use Value: Maintains <1.0 μA leakage at 75 V, avoiding battery drain while clamping 121 V spikes during ISO 7637-2 pulse 5a events. |
| Telecom Line Cards | Consumer Power Adapters |
Use Scenario: Secondary-side overvoltage protection on isolated DC-DC outputs feeding FPGA or ASIC core supplies. IC Role / Device Role / Timing Role: Parallel-connected TVS across output capacitor to absorb flyback energy during regulator fault. Use Value: 600 W PPPM rating handles repetitive 10/1000 μs surges from transformer leakage inductance without thermal runaway. |
Use Scenario: Input-stage transient suppression on universal-input AC-DC adapters subject to mains-borne surges. IC Role / Device Role / Timing Role: Primary-side bidirectional clamp across bridge rectifier output or bulk capacitor. Use Value: SMB package footprint allows compact placement near entry point; 121 V VC ensures downstream 150 V-rated electrolytics remain within derating limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-E3/52 | RoHS-compliant (E3), non-halogen-free; no AEC-Q101 qualification path; same electrical specs and SMB package | Preferred for commercial-grade consumer electronics where halogen-free requirement is not mandated | Select when cost sensitivity outweighs halogen-free or automotive qualification needs |
| SAC75CA | Same 75 V VWM and bidirectional function but in smaller SOD-123FL package; lower 400 W PPPM rating; higher VC (135 V @ 4.5 A) | Suitable for space-constrained portable devices with lower surge immunity requirements (IEC 61000-4-2 only) | Choose only if board area is critical and 600 W surge margin is not required |
Compared with SMBJ75CA-E3/52, the SMBJ75CAHM3_B/H adds halogen-free construction and AEC-Q101 qualification readiness without sacrificing clamping performance; versus SAC75CA, it delivers 50 % higher surge power handling and 14 V lower clamping voltage - directly improving protected IC survival rate in harsh industrial environments.
Availability
SMBJ75CAHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom line cards requiring stable component supply with halogen-free compliance and AEC-Q101 qualification readiness.
Supply support for SMBJ75CAHM3_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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series was developed for high-energy transient suppression in space-constrained, high-reliability applications - targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ75CAHM3_B/H under surge conditions?
The SMBJ75CAHM3_B/H has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected downstream circuitry will not experience voltages exceeding 121 V during standardized surge events - a critical parameter for ensuring compatibility with 150 V-rated capacitors and 100 V MOSFETs in the same power domain. The SMBJ75CAHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ75CAHM3_B/H suitable for automotive applications?
Yes - the HM3 suffix indicates halogen-free, RoHS-compliant construction and readiness for AEC-Q101 qualification; fully qualified variants are designated SMBJ75CAHM3_X (e.g., SMBJ75CAHM3_B). The SMBJ75CAHM3_B/H meets MSL Level 1, operates from –55 °C to +150 °C, and delivers stable 75 V stand-off and 121 V clamping performance required for body electronics, infotainment power rails, and LIN bus protection. It is widely deployed in Tier 1 automotive subsystems where process traceability and long-term supply assurance are enforced.
How does the bidirectional nature of SMBJ75CAHM3_B/H affect PCB layout?
The SMBJ75CAHM3_B/H has no polarity marking and functions identically regardless of orientation - both terminals are electrically symmetrical. This eliminates orientation errors during automated placement and allows flexible routing in AC-coupled paths, differential signaling (e.g., RS-485), or floating grounds. Unlike unidirectional TVS diodes, the SMBJ75CAHM3_B/H requires no cathode band alignment, reducing assembly risk and enabling reuse across multiple board revisions without layout changes. Its SMB (DO-214AA) footprint remains unchanged from unidirectional variants.
What is the thermal resistance of SMBJ75CAHM3_B/H, and how does it impact power dissipation?
The SMBJ75CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. At its rated 5.0 W steady-state power dissipation (PD), this yields a 500 °C temperature rise - which is physically impossible; thus PD represents derated continuous dissipation under ideal heatsinking. In practice, the device is intended for transient-only duty (0.01 % duty cycle), where thermal mass absorbs short pulses. For repeated surges, PCB copper area and airflow must be validated to keep TJ ≤ 150 °C - the SMBJ75CAHM3_B/H's absolute maximum junction temperature.
Does SMBJ75CAHM3_B/H meet industry surge immunity standards?
Yes - the SMBJ75CAHM3_B/H's 600 W peak pulse power rating with 10/1000 μs waveform aligns with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 Ω source impedance) and ISO 7637-2 Pulse 1/2/5a test profiles. Its 121 V clamping voltage ensures protected ICs see well below their absolute maximum ratings during these events. Combined with <1 ns response time and low dynamic impedance, the SMBJ75CAHM3_B/H provides validated protection for systems requiring compliance with EN 55032, CISPR 25 Class 5, and UL 62368-1 transient requirements.
SMBJ75CAHM3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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)
SMBJ75CAHM3_B/H FAQ
1.How can I place an order for SMBJ75CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHM3_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 SMBJ75CAHM3_B/H reliable?
The price and inventory of SMBJ75CAHM3_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 SMBJ75CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHM3_B/H?
SMBJ75CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHM3_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 SMBJ75CAHM3_B/H?
For technical support, including SMBJ75CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ75CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHM3_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 SMBJ75CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHM3_B/H?
All SMBJ75CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHM3_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 SMBJ75CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ75CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHM3_B/H Tags
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