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Vishay General Semiconductor - Diodes Division SMCJ75CAHE3/9AT
- Part No.:
- SMCJ75CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CAHE3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,972
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Product details
Overview
SMCJ75CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 75 V standoff voltage (VWM), 121 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (10/1000 µs waveform), suitable for automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCJ75CAHE3/9AT datasheet, SMCJ75CAHE3/9AT pinout, SMCJ75CAHE3/9AT application, or SMCJ75CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream circuitry. Its bidirectional structure ensures symmetrical clamping in both polarities, with identical VBR min/max (83.3 V / 92.1 V) and leakage (<1 µA at 75 V) in either direction.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 83.3 V / 92.1 V - Breakdown occurs within this range at 1 mA test current, defining clamping onset precision |
| VC @ IPPM | 121 V @ 12.4 A - Clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - Peak surge power handling capability under standardized waveform, critical for lightning/inductive spike immunity |
| IPPM | 12.4 A - Maximum non-repetitive surge current the device can safely shunt without degradation |
| TJ max | +150 °C - Maximum junction temperature, supporting under-hood automotive and high-ambient industrial use |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height, optimized for automated placement |
Pinout & Package
SMCJ75CAHE3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking-consistent with its bidirectional function. Terminals are matte tin-plated leads compatible with standard reflow profiles (peak 260 °C, MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients-no fixed polarity |
| Cathode | Surge return path (bidirectional) | Identical electrical role to Anode; terminals are functionally interchangeable in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Line-to-Line 1 kV/2 Ω tests |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during fast transients, protecting 75 V-rated MOSFETs and gate drivers |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <0.1 %/°C drift coefficient |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail input to clamp ±100 V transients. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 16750-2 tests. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog modules from field-induced surges. IC Role / Device Role / Timing Role: Parallel-connected clamping device on signal lines referenced to local ground. Use Value: Maintains signal integrity below 121 V clamping threshold while surviving repeated 1 kV EFT bursts. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Input protection for PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: Primary overvoltage guard on -48 V DC supply rails prior to DC/DC converters. Use Value: Absorbs up to 1500 W surge energy without failure, meeting Telcordia GR-1089-CORE Level 3 requirements. | Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-motor terminals to limit back-EMF spikes seen by H-bridge MOSFETs. Use Value: Enables use of lower-voltage-rated 100 V MOSFETs while maintaining system-level surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC75CA | Lower PPPM (600 W), same VWM/VC, smaller SMA package | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy is ≤600 W |
| SMCJ75CAHM3/9AT | Halogen-free construction; identical electrical specs and AEC-Q101 qualification | No functional difference; required only for halogen-free compliance mandates | Choose for RoHS-compliant, halogen-free BOMs without performance trade-offs |
Compared with SAC75CA and SMCJ75CAHM3/9AT, the SMCJ75CAHE3/9AT delivers full 1500 W surge capacity in a standard RoHS-compliant SMC package, making it optimal for automotive and industrial designs requiring highest energy absorption without halogen restrictions.
Availability
SMCJ75CAHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom DC power feeds, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ75CAHE3/9AT 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, rectifiers, and protection devices with emphasis on reliability and AEC-Q qualification.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ75CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCJ75CAHE3/9AT provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., SMCJ75A), it has no cathode band marking and exhibits identical breakdown and clamping characteristics in either direction, verified per ANSI/IEEE C62.35 standards.
Is SMCJ75CAHE3/9AT qualified for automotive applications?
Yes, SMCJ75CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and humidity bias, making it suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical.
What is the maximum clamping voltage of SMCJ75CAHE3/9AT and at what current is it specified?
The maximum clamping voltage (VC) of SMCJ75CAHE3/9AT is 121 V, measured at a peak pulse current (IPPM) of 12.4 A under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the SMC (DO-214AB) package of SMCJ75CAHE3/9AT affect thermal performance?
The SMC (DO-214AB) package of SMCJ75CAHE3/9AT provides RθJA = 75 °C/W and RθJL = 15 °C/W, enabling efficient heat transfer to PCB copper pads. When mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, it sustains 1500 W pulses without exceeding TJ = +150 °C, ensuring robust thermal margin in high-power protection layouts.
Can SMCJ75CAHE3/9AT replace unidirectional SMCJ75A in existing designs?
No-SMCJ75CAHE3/9AT cannot directly replace unidirectional SMCJ75A without circuit review. While both share VWM = 75 V and similar clamping, the bidirectional SMCJ75CAHE3/9AT lacks polarity marking and conducts in both directions, potentially interfering with DC bias networks or forward-biased paths. Layout and schematic validation are required before substitution.
SMCJ75CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 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 (SMCJ)
SMCJ75CAHE3/9AT FAQ
1.How can I place an order for SMCJ75CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CAHE3/9AT 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 SMCJ75CAHE3/9AT reliable?
The price and inventory of SMCJ75CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ75CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CAHE3/9AT?
SMCJ75CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CAHE3/9AT 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 SMCJ75CAHE3/9AT?
For technical support, including SMCJ75CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ75CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ75CAHE3/9AT 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 SMCJ75CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ75CAHE3/9AT?
All SMCJ75CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CAHE3/9AT, 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 SMCJ75CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ75CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75CAHE3/9AT Tags
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