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Vishay General Semiconductor - Diodes Division SMCJ75AHE3_A/H
- Part No.:
- SMCJ75AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AHE3_A/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,781
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Product details
Overview
SMCJ75AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 12.4 A peak pulse current (IPPM), and clamps transients to ≤121 V. It is AEC-Q101 qualified and used to protect automotive ECUs, industrial power supplies, and DC bus lines against inductive switching surges.
For engineers reviewing the SMCJ75AHE3_A/H datasheet, SMCJ75AHE3_A/H pinout, SMCJ75AHE3_A/H application, or SMCJ75AHE3_A/H equivalent, key selection criteria include its unidirectional polarity, DO-214AB (SMC) package, 1500 W surge rating, -55 °C to +150 °C operating range, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The SMCJ75AHE3_A/H operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its specified VBR range (83.3–92.1 V). Its low incremental surge resistance ensures stable clamping under high-current transients, while its glass-passivated junction delivers consistent performance across temperature.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak. Its unidirectional configuration requires cathode-band orientation during layout, and it exhibits a positive temperature coefficient of VBR (+0.106 %/°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse voltage before significant leakage; defines maximum normal operating bus voltage. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1 mA - Voltage at which device enters avalanche conduction; ensures reliable triggering above system operating voltage. |
| VC (Clamping Voltage) | ≤121 V at 12.4 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress margin. |
| PPPM (Peak Pulse Power) | 1500 W - Maximum transient energy absorption capability under standardized 10/1000 µs waveform; defines surge robustness class. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Polarity | Unidirectional - Requires correct cathode-band orientation; blocks forward current until VF ≈ 3.5 V at 100 A, enabling DC-biased line protection. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic control units per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); thermal resistance RθJA = 75 °C/W (on recommended pad layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output / high-side connection | Connected to protected line; conducts avalanche current to anode during overvoltage events; must be routed to lowest-impedance return path. |
| Anode | Reference / ground return | Typically tied to system ground or low-impedance reference plane; completes clamping path; layout must minimize inductance to preserve VC performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress tests including temperature cycling, high-temp reverse bias, and humidity testing. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and electrochemical degradation in harsh environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients; maintains tight VC tolerance even at high IPPM. |
| MSL Level 1 rating | Enables standard SMT reflow without pre-baking; compatible with automated placement and high-volume manufacturing. |
| UL 94 V-0 molding compound | Provides flame-retardant housing for safety-critical applications in automotive and industrial enclosures. |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial 24 V DC Power Rail Protection |
|---|---|
|
Use Scenario: Protects microcontroller power supply inputs in engine control modules exposed to load-dump and jump-start transients. IC Role / Device Role: Unidirectional clamping TVS placed between battery rail and input filter capacitor. Use Value: Clamps 120 V/12.4 A transients to ≤121 V, preventing damage to 75 V-rated input regulators and ensuring ECU functional safety compliance. |
Use Scenario: Safeguards programmable logic controllers (PLCs) and motor drives connected to 24 V industrial power buses. IC Role / Device Role: Primary surge suppression on main DC input, upstream of DC/DC converters and I/O protection stages. Use Value: Absorbs 1500 W surges from relay coil switching and inductive load disconnection without derating at full -40 °C to +85 °C ambient. |
| Telecom Base Station DC Feeder Line | On-Board Charger (OBC) High-Voltage DC Link |
|
Use Scenario: Shields remote radio head (RRH) power interfaces from lightning-induced surges on outdoor feeder cables. IC Role / Device Role: First-stage transient suppressor on 48 V DC input, coordinated with downstream MOVs and gas discharge tubes. Use Value: Fast response (<1 ps) and low clamping voltage enable coordination with secondary protection, reducing let-through energy to <10 mJ. |
Use Scenario: Protects bidirectional AC/DC and DC/DC converter stages in EV on-board chargers subjected to regenerative braking spikes. IC Role / Device Role: Unidirectional TVS on 400–800 V DC link, placed across IGBT gate drivers and bus capacitors. Use Value: Withstands repeated 1500 W pulses at TJ up to +150 °C, maintaining clamping stability during thermal cycling in sealed OBC enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75AHE3/A | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VBR range. | Suitable for lower-energy surges; limited to consumer-grade or non-automotive use due to lack of AEC-Q101. | Select when board space is constrained and surge threat level is ≤400 W (e.g., USB power ports, sensor nodes). |
| SMCJ75CAHE3_A/H | Bidirectional variant; identical VWM/VBR, same package and AEC-Q101 rating, but symmetrical clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., CAN FD, RS-485) where polarity reversal may occur. | Choose only if bidirectional protection is mandated; otherwise SMCJ75AHE3_A/H offers superior cost and layout simplicity for DC rails. |
Compared with SMAJ75AHE3/A and SMCJ75CAHE3_A/H, the SMCJ75AHE3_A/H uniquely balances 1500 W surge capacity, AEC-Q101 qualification, and unidirectional efficiency-making it optimal for high-reliability DC power protection where space permits the SMC footprint and polarity is fixed.
Availability
SMCJ75AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial 24 V power systems, and telecom DC feeder protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ75AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure where robustness and qualification compliance are mandatory.
FAQ
What is the clamping voltage of the SMCJ75AHE3_A/H under a 10/1000 µs surge?
The SMCJ75AHE3_A/H has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak pulse current of 12.4 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with proper PCB layout (8.0 mm × 8.0 mm copper pads per lead) and represents the highest voltage the protected circuit will experience during such a transient event. The SMCJ75AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is the SMCJ75AHE3_A/H suitable for automotive applications?
Yes, the SMCJ75AHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use. Its qualification covers stress tests including high-temperature reverse bias, temperature cycling, and humidity testing-ensuring reliability in engine control units, body control modules, and ADAS power supplies. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, making the SMCJ75AHE3_A/H appropriate for under-hood and cabin-mounted electronics.
How does the SMCJ75AHE3_A/H differ from the bidirectional SMCJ75CAHE3_A/H?
The SMCJ75AHE3_A/H is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current until ~3.5 V, whereas the SMCJ75CAHE3_A/H is bidirectional and clamps symmetrically in both polarities. Both share identical VWM (75 V), VBR (83.3–92.1 V), PPPM (1500 W), and AEC-Q101 qualification. The SMCJ75AHE3_A/H is preferred for DC power rails with defined polarity; the CA version is required for AC or floating differential lines like CAN or RS-485.
What is the thermal resistance and maximum junction temperature of the SMCJ75AHE3_A/H?
The SMCJ75AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad layout, and a junction-to-lead resistance (RθJL) of 15 °C/W. Its maximum rated junction temperature is +150 °C, enabling operation in high-ambient environments such as automotive power distribution boxes or industrial motor drive cabinets. Derating curves in the datasheet define safe power dissipation above 25 °C ambient.
Does the SMCJ75AHE3_A/H require special PCB layout considerations?
Yes-the SMCJ75AHE3_A/H requires minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve its rated 1500 W pulse power and maintain thermal stability. Short, wide traces to ground or reference planes are essential to minimize inductance and prevent voltage overshoot during fast transients. The cathode band must be correctly oriented per schematic polarity, and the device should be placed as close as possible to the protected IC or connector to reduce loop inductance. The SMCJ75AHE3_A/H is not exempt from layout-dependent performance shifts.
SMCJ75AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ75AHE3_A/H FAQ
1.How can I place an order for SMCJ75AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AHE3_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 SMCJ75AHE3_A/H reliable?
The price and inventory of SMCJ75AHE3_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 SMCJ75AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ75AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AHE3_A/H?
SMCJ75AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AHE3_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 SMCJ75AHE3_A/H?
For technical support, including SMCJ75AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ75AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ75AHE3_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 SMCJ75AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ75AHE3_A/H?
All SMCJ75AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AHE3_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 SMCJ75AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ75AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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