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Vishay General Semiconductor - Diodes Division SMBJ75CAHE3_A/H
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- Part No.:
- SMBJ75CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHE3_A/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,874
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Product details
Overview
SMBJ75CAHE3_A/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 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_A/H datasheet, SMBJ75CAHE3_A/H pinout, SMBJ75CAHE3_A/H application, or SMBJ75CAHE3_A/H equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), low leakage (<1.0 µA at VWM), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both directions, enabling robust transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1.0 ns), while the SMB package supports high surge current handling (IPPM = 5.0 A) under standardized 10/1000 µs waveform conditions.
Designed for use in circuits where bidirectional overvoltage events occur - such as AC line inputs, RS-485 bus lines, or ungrounded sensor outputs - it delivers consistent clamping performance across -55 °C to +150 °C operating junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown |
| VBR min/max | 83.3 V / 92.1 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients |
| VC @ IPPM | 121 V at 5.0 A - maximum clamped voltage seen by protected circuit during 600 W surge; limits stress on downstream components |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| PPPM | 600 W - peak pulse power dissipation capability with 10/1000 µs waveform; enables protection against lightning-induced surges and inductive switching spikes |
| TJ max | +150 °C - maximum junction temperature rating; supports operation in harsh environments including automotive under-hood applications |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for repetitive surge duty |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction path | Connected to line being protected; forms symmetrical clamping path with cathode during either polarity transient |
| Cathode | Current exit terminal in forward bias; common node for bidirectional conduction path | Connected to reference plane (e.g., ground or rail); completes low-impedance surge shunt path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) when properly laid out with adequate PCB copper area |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile up to 260 °C peak without baking preconditioning |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low leakage drift over temperature and lifetime |
Applications
| Industrial Power Input Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Primary clamping element placed across input rails to limit transient voltage before upstream DC-DC converter. Use Value: Limits voltage excursion to ≤121 V during 5 A surge, preventing damage to 36 V-rated input capacitors and controller ICs. |
Use Scenario: CAN FD transceiver interface in engine control unit subjected to ISO 7637-2 Pulse 1 and Pulse 2b transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between CANH/CANL lines and chassis ground to suppress common-mode surges. Use Value: Clamps differential surges within 1 ns while maintaining <1.0 µA leakage at 75 V, preserving bus signal integrity and timing margins. |
| Telecom AC Adapter Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Secondary-side output of universal AC/DC adapter powering VoIP phone, subject to EN 61000-4-5 surges. IC Role / Device Role / Timing Role: Output rail protector placed after rectification but before LDO regulator to absorb residual transients. Use Value: Absorbs 600 W pulses without degradation, ensuring regulated 5 V output remains within ±5 % during surge events. |
Use Scenario: Brushless DC motor driver board in smart washing machine experiencing back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Snubber-connected TVS across half-bridge FETs to clamp inductive energy during PWM switching transitions. Use Value: Limits drain-source voltage overshoot to 121 V, preventing avalanche failure of 100 V-rated MOSFETs during rapid load changes. |
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 | Commercial-grade variant without AEC-Q101 qualification; identical electrical specs and SMB package | Lacks automotive reliability validation; suitable for industrial/commercial designs not requiring automotive certification | Select when cost sensitivity outweighs need for AEC-Q101 compliance and full automotive qualification testing is not required |
| SAC75CA | Same VWM/VC ratings but in smaller SOD-123 package; lower PPPM (400 W) and higher RθJA (150 °C/W) | Lower surge handling capacity; limited to lower-energy transients or space-constrained layouts where 600 W is not mandated | Choose only if board space is critical and surge threat level is reduced (e.g., secondary-side signal lines vs. primary power rails) |
Compared with SMBJ75CA-E3/52 and SAC75CA, the SMBJ75CAHE3_A/H provides verified AEC-Q101 qualification and full 600 W surge capability in the robust SMB package - making it the preferred choice for automotive and industrial applications demanding highest reliability and energy absorption.
Availability
SMBJ75CAHE3_A/H is available at Aetrix Electronics and suitable for industrial power input protection, automotive sensor interface protection, telecom AC adapter surge protection, and consumer appliance motor drive protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ75CAHE3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom systems - combining rugged packaging, precise clamping, and qualification-grade consistency for mission-critical protection.
FAQ
What does the "HE3" suffix indicate in SMBJ75CAHE3_A/H?
The "HE3" suffix in SMBJ75CAHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. It confirms that the device meets automotive-grade reliability standards including temperature cycling, humidity resistance, and mechanical shock testing - distinguishing it from commercial-grade variants like SMBJ75CA-E3/52. This makes SMBJ75CAHE3_A/H appropriate for under-hood and safety-critical vehicle subsystems where long-term stability under thermal stress is mandatory.
Is SMBJ75CAHE3_A/H unidirectional or bidirectional?
SMBJ75CAHE3_A/H is a bidirectional Transient Voltage Suppressor, indicated by the "CA" suffix. It provides symmetrical clamping behavior for both positive and negative voltage transients, eliminating the need to observe polarity during PCB placement. Unlike unidirectional variants (e.g., SMBJ75A), this device has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals - ideal for AC lines, differential buses, and floating sensor interfaces.
What is the maximum clamping voltage of SMBJ75CAHE3_A/H and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ75CAHE3_A/H is 121 V, measured at a peak pulse current (IPPM) of 5.0 A using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case surge events and is critical for ensuring downstream components - such as 100 V MOSFETs or 3.3 V microcontrollers - remain within their absolute maximum ratings during transient exposure.
Does SMBJ75CAHE3_A/H require special PCB layout considerations?
Yes - SMBJ75CAHE3_A/H requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power dissipation and maintain thermal performance. Short, wide traces should connect the device directly across the protected line and reference plane to minimize inductance, and ground planes must be solid beneath the SMB footprint to reduce impedance. Failure to follow these guidelines may result in elevated clamping voltage and premature device failure during high-current transients.
How does SMBJ75CAHE3_A/H compare to standard Zener diodes for surge protection?
SMBJ75CAHE3_A/H differs fundamentally from standard Zener diodes: it is engineered specifically for high-energy transient suppression, offering 600 W peak pulse power, sub-nanosecond response time, and controlled clamping behavior under surge conditions. Standard Zeners lack surge-rated construction, exhibit higher dynamic impedance during fast transients, and typically fail catastrophically under similar energy levels. SMBJ75CAHE3_A/H also features glass-passivated junctions and MSL Level 1 reflow compatibility - attributes absent in general-purpose Zener diodes.
SMBJ75CAHE3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ75CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHE3_A/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 SMBJ75CAHE3_A/H reliable?
The price and inventory of SMBJ75CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHE3_A/H?
SMBJ75CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHE3_A/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 SMBJ75CAHE3_A/H?
For technical support, including SMBJ75CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ75CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHE3_A/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 SMBJ75CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHE3_A/H?
All SMBJ75CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHE3_A/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 SMBJ75CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ75CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHE3_A/H Tags
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