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Vishay General Semiconductor - Diodes Division SMCJ48AHE3_A/I
- Part No.:
- SMCJ48AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHE3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,470
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Product details
Overview
SMCJ48AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) capability with 10/1000 µs waveform.
For engineers reviewing the SMCJ48AHE3_A/I datasheet, SMCJ48AHE3_A/I pinout, SMCJ48AHE3_A/I application, or SMCJ48AHE3_A/I equivalent, key selection criteria include clamping performance under surge conditions, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48AHE3_A/I operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds VBR, diverting transient energy to ground while limiting downstream voltage to ≤77.4 V. Its glass-passivated junction ensures stable leakage (<1 µA at 48 V) and fast response time (<1.0 ps), critical for protecting sensitive MOSFET gates and microcontroller I/O pins.
Thermally, it sustains 1500 W surges with derating above 25 °C per Fig. 2, and its RθJL = 15 °C/W enables effective heat transfer to PCB copper. The device is RoHS-compliant, halogen-free optional (HM3 suffix), and qualified to AEC-Q101 for automotive underhood applications requiring TJ = –55 to +150 °C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on without premature conduction. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected ICs. |
| PPPM | 1500 W - Peak surge power handling capacity; validates protection against IEC 61000-4-5 Level 4 transients. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor circuits. |
| TJ max. | +150 °C - Enables use in high-temperature automotive engine control units and industrial motor drives. |
| RθJA | 75 °C/W - Thermal resistance to ambient; requires minimum 8.0 mm × 8.0 mm copper pad per terminal for rated power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit's lower-potential node (e.g., GND or return path). | Must be tied to system ground or low-side reference to enable proper clamping during positive transients on cathode side. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 48 V rail or signal trace). | Receives transient voltage; clamps to ≤77.4 V relative to anode when surge exceeds VBR, shunting current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across 15-year service life in harsh environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin. |
| 1500 W peak pulse power | Supports single-event surge suppression up to 19.4 A (10/1000 µs), exceeding IEC 61000-4-5 requirement for industrial equipment. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator ripple in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V supply and ground to clamp transients before they reach PMICs and MCU power inputs. Use Value: Limits voltage to ≤77.4 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream 50 V-rated regulators. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Mounted at connector interface to absorb inductive switching spikes from solenoid valves and contactors. Use Value: Fast <1 ps response and 1 µA leakage preserve signal integrity and prevent false triggering in 24/48 V discrete input modules. |
| Telecom DC Power Interface | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding PoE-powered network switches and base station radios fed from centralized 48 V DC distribution. IC Role / Device Role / Timing Role: Front-end TVS on primary DC input to meet IEC 61000-4-5 Level 4 immunity requirements. Use Value: 1500 W rating handles worst-case lightning-induced surges on outdoor telecom lines without degradation. |
Use Scenario: Protecting high-side and low-side gate drivers in 48 V BLDC motor inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Placed across gate-source terminals of Si MOSFETs to clamp dv/dt-induced ringing. Use Value: 77.4 V clamping prevents gate oxide breakdown in 60 V-rated MOSFETs during commutation events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3_A/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs. | Suitable for space-constrained consumer electronics but insufficient for industrial-level surge immunity. | Select only when board area is critical and surge threat level is ≤600 W (e.g., USB-C PD adapters). |
| SMCJ48CAHE3_A/I | Bidirectional variant; identical VWM/VBR/VC but symmetric clamping in both polarities. | Required for AC-coupled signal lines or differential buses where negative transients occur (e.g., RS-485, CAN FD). | Choose when protecting bidirectional interfaces; not interchangeable with SMCJ48AHE3_A/I due to polarity and circuit topology. |
Compared with SMBJ48AHE3_A/I and SMCJ48CAHE3_A/I, the SMCJ48AHE3_A/I uniquely balances 1500 W surge capacity, AEC-Q101 qualification, and unidirectional polarity-making it optimal for high-reliability 48 V DC power rail protection where asymmetric transients dominate and automotive qualification is mandatory.
Availability
SMCJ48AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU power management, industrial PLC input conditioning, and telecom DC interface protection requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMCJ48AHE3_A/I 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for high-reliability industrial, automotive, and computing applications.
The SMCJ series was developed specifically for robust transient suppression in 12–188 V DC systems, emphasizing AEC-Q101 qualification, low clamping ratio, and compatibility with automated SMT assembly.
FAQ
What is the clamping voltage of the SMCJ48AHE3_A/I under a 10/1000 µs surge?
The SMCJ48AHE3_A/I has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMCJ48AHE3_A/I maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is the SMCJ48AHE3_A/I qualified for automotive applications?
Yes, the SMCJ48AHE3_A/I carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay's documentation. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life, making it suitable for under-hood automotive modules such as body control units and ADAS power supplies. The SMCJ48AHE3_A/I meets the reliability requirements for automotive-grade TVS diodes in demanding thermal and electrical environments.
What is the thermal resistance of the SMCJ48AHE3_A/I, and how does it affect layout?
The SMCJ48AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To achieve rated 1500 W pulse power, PCB layout must provide these minimum pad dimensions and ensure adequate copper pour connectivity. Reducing pad size increases junction temperature and reduces surge survivability-so the SMCJ48AHE3_A/I's thermal design must follow Vishay's recommended footprint in Document Number 88394.
How does the SMCJ48AHE3_A/I differ from the bidirectional SMCJ48CAHE3_A/I?
The SMCJ48AHE3_A/I is unidirectional with cathode band marking and conducts only in reverse bias above VBR, while the SMCJ48CAHE3_A/I is bidirectional with no polarity marking and clamps symmetrically for both positive and negative transients. Their VWM (48 V), VBR (53.3–58.9 V), and VC (77.4 V) match, but the SMCJ48AHE3_A/I cannot protect AC or differential signals. Substituting one for the other requires circuit redesign-especially in grounding and signal coupling paths.
What is the maximum reverse leakage current of the SMCJ48AHE3_A/I at its stand-off voltage?
The SMCJ48AHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 48 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems like automotive telematics and industrial sensors. Leakage remains below 5 µA up to +125 °C, preserving battery runtime and avoiding false fault detection in high-impedance monitoring circuits using the SMCJ48AHE3_A/I.
SMCJ48AHE3_A/I 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- 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)
SMCJ48AHE3_A/I FAQ
1.How can I place an order for SMCJ48AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHE3_A/I 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 SMCJ48AHE3_A/I reliable?
The price and inventory of SMCJ48AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ48AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHE3_A/I?
SMCJ48AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHE3_A/I 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 SMCJ48AHE3_A/I?
For technical support, including SMCJ48AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ48AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHE3_A/I 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 SMCJ48AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ48AHE3_A/I?
All SMCJ48AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHE3_A/I, 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 SMCJ48AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ48AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHE3_A/I Tags
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