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Vishay General Semiconductor - Diodes Division SMCG75CAHE3/9AT
- Part No.:
- SMCG75CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG75CAHE3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,993
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Product details
Overview
SMCG75CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 75 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 121 V at 12.4 A IPPM, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SMCG75CAHE3/9AT datasheet, SMCG75CAHE3/9AT pinout, SMCG75CAHE3/9AT application, or SMCG75CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 reflow compatibility, and validated performance under 10/1000 μs surge waveforms per ANSI/IEEE C62.35.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown behavior in both polarities, enabling robust protection of differential or AC-coupled signal/power lines without polarity sensitivity. Its glass-passivated junction ensures stable VBR (83.3–92.1 V) and low leakage (<1.0 μA at VWM), while the DO-215AB package delivers thermal resistance of 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads.
The SMCG75CAHE3/9AT is rated for non-repetitive 10/1000 μs surges up to 1500 W and supports peak forward surge current of 200 A (8.3 ms half-sine, unidirectional only), though its bidirectional configuration precludes forward conduction use. Junction temperature range spans −55 °C to +150 °C, supporting operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V/24 V automotive systems. |
| VBR min/max | 83.3 V / 92.1 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on within defined tolerance band. |
| VC @ IPPM | 121 V - Clamping voltage at 12.4 A peak pulse current; determines maximum voltage seen by protected circuit during surge. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; quantifies single-event surge energy absorption capability. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in engine bay or powertrain control units. |
| MSL Level | Level 1 (per J-STD-020) - Supports lead-free reflow up to 260 °C peak without moisture-induced damage. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 solderability and JESD22-B102 whisker testing. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; symmetric conduction enables AC line protection. |
| Cathode | Surge return path (bidirectional) | Electrically identical to Anode terminal in CA-series devices; no functional distinction-both terminals are interchangeable. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in automotive under-hood environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 5a), improving system-level EMC robustness. |
| AEC-Q101 qualification | Validates reliability for automotive power electronics including body control modules, ADAS sensors, and infotainment power supplies. |
| MSL Level 1 rating | Enables direct placement into high-temperature lead-free reflow processes without baking or special handling. |
| UL 94 V-0 molding compound | Meets flammability requirements for enclosed automotive and industrial enclosures where fire safety is mandated. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump and alternator switching transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt clamping TVS placed between power rail and ground, activated within <1 ns to limit voltage to ≤121 V. Use Value: Prevents latch-up or permanent damage to downstream DC/DC converters and microcontrollers during 120 V/100 ms load dump events. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential signal pairs or supply/return lines to suppress ±1 kV EFT bursts. Use Value: Maintains signal integrity and prevents false triggering in 4–20 mA loops subjected to IEC 61000-4-4 EFT coupling. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary protection on AC/DC front-end stages of telecom base station power supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Coordinated clamping device downstream of GDT or MOV primary protectors, absorbing residual energy with precise VC control. Use Value: Limits let-through voltage to <121 V during combined 10/1000 μs surges, protecting bridge rectifiers and bulk capacitors from overvoltage stress. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Bidirectional TVS across motor terminals to clamp inductive kickback in both directions during PWM switching. Use Value: Eliminates need for separate flyback diodes while providing symmetric clamping at 121 V, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA | Lower PPPM (400 W), SMA (DO-214AC) package, higher RθJA (~100 °C/W), same VWM/VBR range. | Not AEC-Q101 qualified; suitable for commercial-grade consumer or industrial equipment with lower surge severity. | Select SMAJ75CA only when cost sensitivity outweighs automotive qualification and 1500 W surge headroom. |
| SMCJ75CA | Same 1500 W PPPM and DO-214AB package, but lacks AEC-Q101 qualification and uses standard E3 suffix (not HE3). | Acceptable for industrial automation where AEC-Q101 is not mandated, but requires verification of long-term reliability in high-temp environments. | Choose SMCJ75CA if AEC-Q101 is unnecessary and existing board layout uses DO-214AB footprint. |
Compared with SMAJ75CA and SMCJ75CA, the SMCG75CAHE3/9AT provides superior thermal performance (RθJA = 75 °C/W vs. ~100 °C/W), guaranteed automotive qualification, and optimized gull-wing leads for automated placement yield-making it the preferred choice for mission-critical 24 V automotive power domains.
Availability
SMCG75CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom power supply surge suppression requiring stable component supply and full traceability.
Supply support for SMCG75CAHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCG series was developed specifically for high-power, high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 validation with optimized thermal and surge response characteristics.
FAQ
What does the "HE3" suffix indicate in SMCG75CAHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. Unlike base E3 parts, SMCG75CAHE3/9AT is explicitly validated for automotive under-hood use, including temperature cycling and high-humidity reliability testing per AEC-Q101 requirements. This makes SMCG75CAHE3/9AT distinct from non-HE3 variants in both certification scope and process controls.
Is SMCG75CAHE3/9AT suitable for protecting CAN bus lines?
No, SMCG75CAHE3/9AT is not recommended for CAN bus line protection due to its 75 V standoff voltage and 121 V clamping level, which far exceed the ±40 V common-mode range and ±12 V differential swing of ISO 11898-2 physical layer. Dedicated low-capacitance, low-Vc TVS arrays such as Vishay's USBxxC series or Semtech's RClamp series are better suited for CAN FD data line protection without signal distortion.
How does the DO-215AB package of SMCG75CAHE3/9AT compare thermally to DO-214AB?
The DO-215AB package used in SMCG75CAHE3/9AT offers lower thermal resistance than DO-214AB: RθJA is 75 °C/W versus ~85–90 °C/W for DO-214AB under identical 8 mm × 8 mm pad conditions. This 10–15 % improvement enhances sustained power dissipation capability and extends safe operating time during repetitive surge events, particularly critical in automotive power distribution modules.
Can SMCG75CAHE3/9AT be used in unidirectional configurations?
No-SMCG75CAHE3/9AT is strictly a bidirectional device, as indicated by the "CA" suffix. Its internal structure lacks a defined anode/cathode polarity; both terminals behave identically under positive or negative transients. For unidirectional applications requiring forward conduction (e.g., DC power rail clamping), engineers must select an "A"-suffix part like SMCG75AHE3/9AT, which has asymmetric VBR and VF characteristics.
What is the minimum recommended PCB pad layout for SMCG75CAHE3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG75CAHE3/9AT to achieve rated PPPM and thermal performance. Smaller pads reduce surge current handling and increase junction temperature rise; using the recommended layout ensures full 1500 W 10/1000 μs rating and maintains RθJA at 75 °C/W. Thermal vias beneath pads further improve heat spreading in multilayer boards.
SMCG75CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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):
- 12.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCG)
SMCG75CAHE3/9AT FAQ
1.How can I place an order for SMCG75CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG75CAHE3/9AT 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 SMCG75CAHE3/9AT reliable?
The price and inventory of SMCG75CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG75CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG75CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG75CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG75CAHE3/9AT?
SMCG75CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG75CAHE3/9AT 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 SMCG75CAHE3/9AT?
For technical support, including SMCG75CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG75CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG75CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG75CAHE3/9AT 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 SMCG75CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG75CAHE3/9AT?
All SMCG75CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG75CAHE3/9AT, 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 SMCG75CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG75CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG75CAHE3/9AT Tags
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