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Vishay General Semiconductor - Diodes Division SMBJ75CAHM3/I
- Part No.:
- SMBJ75CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHM3/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,553
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Product details
Overview
SMBJ75CAHM3/I 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 standoff voltage (VWM), 83.3–92.1 V breakdown range (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 - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ75CAHM3/I datasheet, SMBJ75CAHM3/I pinout, SMBJ75CAHM3/I application, or SMBJ75CAHM3/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling robust protection against ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - validated for automotive-grade reliability without marking on the bidirectional body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 83.3 V / 92.1 V at 1.0 mA - Confirmed bidirectional breakdown threshold; ensures consistent clamping onset across polarity. |
| VC @ IPPM | 121 V at 5.0 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - Peak pulse power handling capability; supports repetitive 0.01% duty cycle surges in industrial environments. |
| IPPM | 5.0 A - Peak pulse current corresponding to VC; used with PCB trace impedance to estimate let-through energy. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial settings. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetrical; device conducts identically in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; forms symmetrical clamping node with cathode - no DC polarity dependency. |
| Cathode | Transient return path (bidirectional) | Connects to protected line; functions identically to anode in bidirectional mode - no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC-coupled or floating lines. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and infotainment power rails - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS | HM3 suffix confirms compliance with JEDEC J-STD-609A Class 1 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling. |
| Low clamping ratio | VC/VWM = 1.61 - tight voltage margin between standoff and clamping improves system-level surge immunity without overdesigning downstream components. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/60% RH - supports standard SMT assembly without dry pack or baking requirements. |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting 24 V analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal-to-ground and supply-to-ground nodes to clamp ±100 V transients within 1 ns. Use Value: Prevents damage to precision op-amps and ADC inputs while maintaining <1.0 µA leakage at 24 V nominal - no signal distortion or offset drift. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled surges on vehicle body electronics networks. IC Role / Device Role / Timing Role: Placed differential across CAN_H/CAN_L lines to suppress common-mode transients up to ±30 kV contact ESD (IEC 61000-4-2). Use Value: Maintains CAN bus integrity with <121 V clamping and <1.0 ns response - avoids bit errors or bus-off conditions during EMC testing. |
| Telecom Power Input Stage | AC-DC Adapter Secondary Side |
|
Use Scenario: Shielding 48 V PoE-powered equipment (e.g., IP cameras, access points) from lightning-induced surges on Ethernet data pairs and DC input lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed at RJ45 connector and DC jack to absorb 600 W 10/1000 µs surges per IEC 61000-4-5 Level 4. Use Value: Enables single-device protection of both data and power paths - reduces BOM count versus dual unidirectional TVS solutions. |
Use Scenario: Suppressing flyback spikes and line transients on the secondary-side 12 V/5 V outputs of isolated AC-DC adapters used in medical and test equipment. IC Role / Device Role / Timing Role: Mounted across output rails to ground to clamp overshoot during load step changes and external surge coupling. Use Value: Limits output voltage excursion to ≤121 V - protects downstream LDOs and microcontrollers without requiring oversized output capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CAHE3/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not halogen-free or AEC-Q101 qualified). | Lacks automotive qualification and halogen-free certification - suitable for consumer or industrial non-automotive use only. | Select when AEC-Q101 or halogen-free compliance is not required; lower cost alternative with identical clamping performance. |
| SMAJ75CAHM3 | Same VWM/VC ratings but in smaller SMA (DO-214AC) package; 400 W PPPM (vs. 600 W); higher thermal resistance (RθJA = 140 °C/W). | Lower surge handling and reduced thermal margin - limited to low-energy transients or space-constrained designs where 600 W is not needed. | Choose only if board space is critical and peak surge energy remains below 400 W; verify thermal derating at target ambient temperature. |
Compared with SMBJ75CAHM3/I, SMBJ75CAHE3/I offers identical protection performance without automotive qualification, while SMAJ75CAHM3 trades 33 % lower surge power and higher thermal resistance for a 30 % smaller footprint - neither is pin-compatible due to differing package outlines.
Availability
SMBJ75CAHM3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus protection, telecom power input stages, and AC-DC adapter secondary-side surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ75CAHM3/I 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 targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where AEC-Q101 qualification, bidirectional symmetry, and 600 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMBJ75CAHM3/I at its rated peak pulse current?
The SMBJ75CAHM3/I has a maximum clamping voltage (VC) of 121 V when subjected to its specified peak pulse current of 5.0 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75CAHM3/I maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMBJ75CAHM3/I suitable for automotive applications?
Yes, SMBJ75CAHM3/I is AEC-Q101 qualified and built with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive applications including engine control units, body electronics, and infotainment systems. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 moisture sensitivity rating, and validation across temperature cycling, HTRB, and ESD stress tests confirm its readiness for under-hood and chassis-mounted deployments. The SMBJ75CAHM3/I meets automotive reliability requirements without requiring additional qualification screening.
How does the bidirectional design of SMBJ75CAHM3/I affect PCB layout?
The SMBJ75CAHM3/I has no polarity marking and identical electrical behavior in both directions, eliminating the need for orientation-aware placement on PCBs. This simplifies layout for AC-coupled signals, floating grounds, or differential buses like CAN or RS-485, where traditional unidirectional TVS diodes would require careful anode/cathode alignment. Engineers can place the SMBJ75CAHM3/I across any two nodes without concern for DC bias direction - reducing assembly errors and enabling reuse across multiple signal types in a single design.
What is the thermal resistance of SMBJ75CAHM3/I, and how does it impact power dissipation?
The SMBJ75CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, and junction-to-lead resistance (RθJL) of 20 °C/W. These values define its ability to dissipate heat during repetitive surge events: at 5.0 W steady-state power (PD), junction temperature rise is 500 °C above ambient - but since PD is specified at TA = 50 °C, actual usable continuous power must be derated above that temperature per Figure 2 in the datasheet. The SMBJ75CAHM3/I relies on short-duration pulse handling rather than continuous dissipation.
Does SMBJ75CAHM3/I meet industry surge immunity standards such as IEC 61000-4-5?
Yes, the SMBJ75CAHM3/I is designed to support compliance with IEC 61000-4-5 for surge immunity testing, particularly Level 4 (4 kV line-to-earth, 2 kV line-to-line) when applied with appropriate PCB layout - including minimum 0.2" × 0.2" copper pads and low-inductance grounding. Its 600 W peak pulse power rating, 121 V clamping voltage, and sub-nanosecond response time enable effective suppression of 10/1000 µs combination wave surges. While the SMBJ75CAHM3/I itself is not certified to the standard, its parameters align with typical implementation requirements for passing system-level IEC 61000-4-5 testing.
SMBJ75CAHM3/I 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):
- 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/I FAQ
1.How can I place an order for SMBJ75CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHM3/I 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/I reliable?
The price and inventory of SMBJ75CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHM3/I?
SMBJ75CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHM3/I 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/I?
For technical support, including SMBJ75CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHM3/I requirements.
6.How does Aetrix verify that SMBJ75CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHM3/I?
All SMBJ75CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHM3/I, 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/I part is unused and in its original packaging.
Return procedure for SMBJ75CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHM3/I Tags
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