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Vishay General Semiconductor - Diodes Division SMBJ75CAHE3/5B
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- Part No.:
- SMBJ75CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHE3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,426
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Product details
Overview
SMBJ75CAHE3/5B 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 - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ75CAHE3/5B datasheet, SMBJ75CAHE3/5B pinout, SMBJ75CAHE3/5B application, or SMBJ75CAHE3/5B equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 10/1000 µs waveform rating reflects standardized lightning/surge immunity testing per ANSI/IEEE C62.35.
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 20 °C/W junction-to-lead thermal resistance supports localized heat dissipation during repetitive surge events when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 72 V nominal DC bus lines. |
| VBR min/max | 83.3 V / 92.1 V at IT = 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on under surge conditions. |
| VC @ IPPM | 121 V at 5.0 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive or industrial enclosures. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pads; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals; bidirectional clamping allows connection across any two points without orientation concern. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential signals without external polarity management. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for ADAS sensor modules. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) when properly laid out. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure during clamping - critical for protecting 80 V-rated MOSFETs or 3.3 V/5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from ESD and inductive switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential pair or supply rail to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide damage in transceivers by clamping surges to ≤121 V while maintaining <1 µA leakage at 75 V nominal rail. |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair data lines in outdoor base stations. IC Role / Device Role / Timing Role: Primary-level TVS connected between pairs and chassis ground to shunt common-mode energy before reaching isolation transformers. Use Value: Absorbs 600 W surge energy per line pair without degradation, supporting EN 61000-4-5 compliance with minimal board space. |
| Automotive Body Control Module | Power Supply Input Stage |
|
Use Scenario: Safeguarding LIN bus nodes and LED driver inputs against load dump and jump-start transients in vehicle interior electronics. IC Role / Device Role / Timing Role: Secondary protection device downstream of primary fuses and upstream of LDOs or microcontrollers. Use Value: AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient, with 121 V clamping preserving 12 V system integrity during 24 V load dump events. |
Use Scenario: Suppressing switching noise and input surges on 72 V DC-DC converter front-ends used in industrial PLC power supplies. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly at connector entry point to divert surge current before bulk capacitance. Use Value: 75 V VWM aligns with 72 V nominal input, allowing stable operation during normal conditions while triggering reliably at ≥83.3 V transients. |
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 | Halogen-free, RoHS-compliant variant without AEC-Q101 qualification; identical electrical specs and SMB package. | Preferred for commercial/industrial designs where automotive qualification is not required but halogen-free compliance is mandated. | Select when environmental compliance (halogen-free) is prioritized over automotive reliability validation. |
| SAC75CA | Same VWM/VBR/VC ratings but in smaller SOD-123 package; lower PPPM (400 W) and higher RθJA (150 °C/W). | Suitable for space-constrained consumer electronics with lower surge threat levels; not recommended for automotive or industrial mains-connected systems. | Choose only for compact, low-power applications where 600 W surge handling is unnecessary and thermal margin is sufficient. |
Compared with SMBJ75CAHE3/5B, the M3/5B offers identical surge performance without AEC-Q101 validation, while SAC75CA trades power handling and thermal robustness for footprint reduction - making SMBJ75CAHE3/5B the optimal choice for automotive-qualified, high-energy transient protection.
Availability
SMBJ75CAHE3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ75CAHE3/5B 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, efficiency, and application-specific optimization.
The SMBJ series delivers high-power transient suppression in compact surface-mount packages, engineered for robustness in automotive, industrial, and communications infrastructure where surge immunity and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMBJ75CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ75CAHE3/5B provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ75A), it has no cathode marking and functions identically regardless of polarity - essential for AC-coupled or differential signal protection where polarity reversal may occur.
Is SMBJ75CAHE3/5B suitable for automotive applications?
Yes, SMBJ75CAHE3/5B is AEC-Q101 qualified, confirming its reliability for automotive use cases including body control modules, infotainment interfaces, and sensor nodes. The HE3 suffix explicitly indicates RoHS-compliant and AEC-Q101 validated construction, with testing covering temperature cycling, highly accelerated life testing, and ESD robustness per automotive requirements.
How does the clamping voltage of SMBJ75CAHE3/5B compare to its breakdown voltage?
SMBJ75CAHE3/5B has a VBR range of 83.3–92.1 V at 1 mA and a maximum clamping voltage (VC) of 121 V at 5.0 A. This yields a clamping ratio of ~1.31, indicating tight voltage control during surge events - significantly lower than typical ratios >1.5 found in older TVS families - which helps maintain safer margins for downstream 80 V-rated components.
What is the significance of the "5B" in SMBJ75CAHE3/5B?
The "5B" denotes the preferred package code specifying 13-inch diameter plastic tape-and-reel packaging with a base quantity of 3200 units. This format is optimized for high-speed automated pick-and-place assembly, and differs from "52" (7-inch reel, 750 units) - ensuring consistent feeding and reduced changeover time in volume SMT production lines using SMBJ75CAHE3/5B.
Can SMBJ75CAHE3/5B be used in place of a unidirectional TVS like SMBJ75A?
No - SMBJ75CAHE3/5B is bidirectional and lacks polarity marking, whereas SMBJ75A is unidirectional with a defined cathode band. Substituting SMBJ75CAHE3/5B for SMBJ75A in DC-coupled circuits may cause unintended conduction or failure to clamp correctly. Use SMBJ75CAHE3/5B only where bidirectional protection is explicitly required, such as AC lines or differential buses.
SMBJ75CAHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ75CAHE3/5B FAQ
1.How can I place an order for SMBJ75CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHE3/5B 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 SMBJ75CAHE3/5B reliable?
The price and inventory of SMBJ75CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHE3/5B?
SMBJ75CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHE3/5B 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 SMBJ75CAHE3/5B?
For technical support, including SMBJ75CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ75CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHE3/5B 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 SMBJ75CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHE3/5B?
All SMBJ75CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHE3/5B, 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 SMBJ75CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ75CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHE3/5B Tags
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