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Vishay General Semiconductor - Diodes Division SMBJ75CAHE3_B/I
- Part No.:
- SMBJ75CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHE3_B/I.pdf
- Description:
- 600W,75V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,104
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Product details
Overview
SMBJ75CAHE3_B/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 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.
For engineers reviewing the SMBJ75CAHE3_B/I datasheet, SMBJ75CAHE3_B/I pinout, SMBJ75CAHE3_B/I application, or SMBJ75CAHE3_B/I equivalent, this device is selected for robust ESD and surge protection in automotive-grade (AEC-Q101 qualified), telecom, and industrial control systems where bidirectional transient suppression with low clamping ratio and fast response (<1 ns) is required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable leakage performance (≤1.0 µA at VWM) and low incremental surge resistance, enabling consistent energy absorption without thermal runaway under repetitive 0.01% duty cycle surges.
The device complies with ANSI/IEEE C62.35 standards and meets UL 497B recognition (QVGQ2) for protector classification. With a 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity, it supports lead-free reflow up to 260 °C and is rated for operation from –55 °C to +150 °C.
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 mA - Confirmed minimum/maximum avalanche initiation range; ensures predictable turn-on across production lot. |
| VC (Clamping Voltage) | 121 V at 5.0 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables downstream component voltage margining. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability per single 10/1000 µs event; validated on 5.0 mm × 5.0 mm copper pads. |
| IPPM (Peak Pulse Current) | 5.0 A - Maximum non-repetitive surge current supported at rated clamping voltage; directly determines PCB trace sizing and fuse coordination. |
| TJmax | 150 °C - Maximum allowable junction temperature; sets thermal design limits for ambient derating and heatsinking requirements. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" × 0.155" footprint; compatible with automated pick-and-place and J-STD-002 soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; forms symmetrical path with cathode for full-cycle clamping. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; enables bidirectional protection without external polarity management. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly laid out with low-inductance paths. |
| Bidirectional symmetry (CA suffix) | Eliminates need for polarity-aware placement or external series components - simplifies layout for AC-coupled or floating signal lines. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero-defect reliability under thermal cycling and vibration stress. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected ICs - critical for 75 V-rated microcontrollers and gate drivers with tight absolute maximum ratings. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without pre-baking; reduces manufacturing complexity and cost in high-volume production. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver inputs against inductive kickback from 24 V DC motor switching. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at driver IC input pins to limit transient excursions below 121 V. Use Value: Prevents latch-up or oxide breakdown in isolated gate drivers (e.g., Si823x) during MOSFET turn-off events with <100 ns response. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and battery reversal transients in door module ECUs. IC Role / Device Role / Timing Role: Primary TVS on LIN transceiver (e.g., TJA1020) supply and data lines to absorb ±100 V/500 ms pulses. Use Value: Maintains bus communication integrity during ISO 16750-2 load dump tests without requiring additional series impedance or filtering. |
| Telecom Power Supply Inputs | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for 48 V telecom rectifiers subjected to lightning-induced surges on primary-side AC lines. IC Role / Device Role / Timing Role: First-line clamping device upstream of bridge rectifier and bulk capacitor to divert >1 kV transients. Use Value: Limits voltage stress on primary-side FETs and controller ICs (e.g., UCC28070) to within 121 V, avoiding overvoltage shutdown. |
Use Scenario: Protection of analog front-end inputs (e.g., ADS1256) in factory-floor pressure/temperature sensors connected via long cables. IC Role / Device Role / Timing Role: Localized TVS at connector interface to suppress ESD (IEC 61000-4-2 ±15 kV) and cable-coupled noise. Use Value: Preserves 24-bit ADC accuracy by preventing input stage saturation or damage during field maintenance hot-plug events. |
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-M3/5B | Same electrical specs, halogen-free RoHS-compliant (HM3 suffix), no AEC-Q101 qualification | Preferred for commercial/industrial designs where automotive qualification is not mandated | Select when cost-sensitive volume production requires halogen-free compliance without automotive validation overhead |
| SMCJ75CAHE3_A/H | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VC values | Used where higher surge repetition rate or longer duration transients (e.g., IEC 61000-4-4) demand greater thermal mass | Choose when system-level testing reveals insufficient margin with 600 W rating - requires PCB footprint change |
Compared with SMBJ75CA-M3/5B, the SMBJ75CAHE3_B/I adds AEC-Q101 qualification for automotive use but shares identical clamping performance; versus SMCJ75CAHE3_A/H, it trades 2.5× peak power for 30% smaller board area and faster response due to lower junction capacitance.
Availability
SMBJ75CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and industrial sensor signal conditioning requiring stable component supply across extended product lifecycles.
Supply support for SMBJ75CAHE3_B/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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed to deliver high-power, low-clamping TVS protection in compact surface-mount packages for automotive, industrial, and telecom systems demanding AEC-Q101 compliance and repeatable surge immunity.
FAQ
What does the "CA" suffix indicate in SMBJ75CAHE3_B/I?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ75CAHE3_B/I provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ75A), it has no polarity marking and conducts identically in either direction, making it ideal for AC-coupled lines, differential buses, or floating grounds where polarity cannot be guaranteed.
Is SMBJ75CAHE3_B/I AEC-Q101 qualified, and what does that cover?
Yes, SMBJ75CAHE3_B/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. This qualification covers stress tests including temperature cycling, mechanical shock, humidity bias, and high-temperature operating life - validating its suitability for automotive powertrain, chassis, and body electronics applications where zero-defect reliability is mandatory.
How does the clamping voltage of SMBJ75CAHE3_B/I compare to its standoff voltage?
SMBJ75CAHE3_B/I has a 75 V standoff voltage (VWM) and a maximum clamping voltage (VC) of 121 V at 5.0 A. This yields a clamping ratio of ~1.61, which is typical for 600 W SMB-packaged TVS diodes. The 46 V headroom between VWM and VC allows safe operation of downstream 100 V-rated components while maintaining effective surge suppression.
Can SMBJ75CAHE3_B/I be used in place of a unidirectional SMBJ75A?
No - SMBJ75CAHE3_B/I is not a drop-in replacement for unidirectional SMBJ75A. While both share the same VWM, VBR, and package, the bidirectional CA version lacks cathode marking and conducts in both directions. Substituting it into a unidirectional circuit may cause unintended conduction or short-circuit conditions, especially in DC-biased applications like power rail protection.
What is the maximum printed circuit board pad size recommended for SMBJ75CAHE3_B/I?
Vishay specifies thermal performance based on mounting the SMBJ75CAHE3_B/I on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Using smaller pads increases thermal resistance and reduces peak pulse power handling - derating curves in Figure 2 show up to 30% power loss at 75 °C ambient if pad area falls below this minimum. Larger pads improve heat dissipation but do not increase rated PPPM beyond 600 W.
SMBJ75CAHE3_B/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:
- 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)
SMBJ75CAHE3_B/I FAQ
1.How can I place an order for SMBJ75CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHE3_B/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 SMBJ75CAHE3_B/I reliable?
The price and inventory of SMBJ75CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHE3_B/I?
SMBJ75CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHE3_B/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 SMBJ75CAHE3_B/I?
For technical support, including SMBJ75CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ75CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHE3_B/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 SMBJ75CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHE3_B/I?
All SMBJ75CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHE3_B/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 SMBJ75CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ75CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHE3_B/I Tags
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