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Vishay General Semiconductor - Diodes Division SMCJ48AHE3/57T
- Part No.:
- SMCJ48AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHE3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,347
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Product details
Overview
SMCJ48AHE3/57T 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 rating (10/1000 µs waveform).
For engineers reviewing the SMCJ48AHE3/57T datasheet, SMCJ48AHE3/57T pinout, SMCJ48AHE3/57T application, or SMCJ48AHE3/57T equivalent, this device is selected for automotive-grade ESD/surge protection where AEC-Q101 qualification, low clamping ratio, and high surge current handling are required - especially in 48 V battery systems, sensor interfaces, and industrial I/O modules.
Technical Context
The SMCJ48AHE3/57T operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient events such as ISO 7637-2 load dump or IEC 61000-4-5 surges. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in harsh environments without active cooling.
It delivers 1500 W peak pulse power dissipation under standardized 10/1000 µs waveform conditions, with low incremental surge resistance ensuring minimal voltage overshoot during high-current transients. The device is RoHS-compliant and qualified to AEC-Q101, confirming suitability for automotive electronics applications requiring long-term reliability.
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 IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on behavior across temperature and unit variation. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamping voltage under full-rated surge; limits downstream IC stress to ≤77.4 V during 1500 W transient. |
| PPPM | 1500 W (10/1000 µs) - Peak surge energy handling capacity; supports automotive load-dump and lightning-induced surge immunity. |
| ID @ VWM | 1.0 µA - Ultra-low leakage at rated stand-off voltage; preserves efficiency in always-on power monitoring circuits. |
| TJ max. | +150 °C - Enables deployment in engine bay, motor control, or industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTOL, TC, HAST, and UHAST. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics - enables direct use in ADAS, body control modules, and 48 V mild-hybrid systems without requalification. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance; critical for field reliability in humid or thermally cycled environments. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage exposure to downstream ICs - e.g., protects 60 V-rated CAN transceivers or microcontrollers during surge events. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; no pre-baking required prior to assembly. |
| 1500 W peak pulse power | Withstands ≥1000× ISO 7637-2 Pulse 5a (load dump) events without degradation when mounted on 8 mm × 8 mm copper pads. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump transients (ISO 7637-2 Pulse 5a) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤77.4 V during 1500 W surge, preventing damage to 65 V-rated MOSFETs and gate drivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from EFT and surge coupling. IC Role / Device Role / Timing Role: TVS connected across differential signal pair (e.g., RS-485 bus) referenced to local ground. Use Value: Sub-1 ns response clamps induced transients before they corrupt ADC sampling or trigger false fault detection. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
|
Use Scenario: Safeguarding PoE-powered equipment inputs (e.g., 48 V PSE side) from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on DC input rail upstream of hot-swap controller and filter capacitors. Use Value: 1.0 µA leakage avoids loading standby power paths; 1500 W rating meets IEC 61000-4-5 Level 4 (4 kV) requirements. |
Use Scenario: Protecting isolated gate driver enable/disable signals in BLDC inverters exposed to switching noise and cross-talk. IC Role / Device Role / Timing Role: TVS placed at microcontroller GPIO output driving optocoupler input. Use Value: Prevents latch-up or permanent damage to MCU pins during high-dV/dt events from adjacent power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3/52T | Lower PPPM (600 W), SMB (DO-214AA) package, same VWM/VBR/VC specs. | Reduced surge margin; suitable only for non-automotive, lower-energy transients (e.g., consumer USB ports). | Select when board space is constrained and surge threat level is ≤600 W - not for AEC-Q101 or load-dump scenarios. |
| SMCJ48CAHE3/57T | Bidirectional variant; identical VWM/VBR/VC but symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio inputs) where polarity reversal may occur. | Choose only if bidirectional protection is mandated; adds no benefit for unidirectional DC rails like 48 V battery inputs. |
Compared with SMBJ48AHE3/52T, the SMCJ48AHE3/57T provides 2.5× higher surge power headroom and AEC-Q101 validation; compared with SMCJ48CAHE3/57T, it offers tighter clamping tolerance and lower cost for fixed-polarity DC applications.
Availability
SMCJ48AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom DC power input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMCJ48AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where robustness and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of the SMCJ48AHE3/57T under full-rated surge current?
The SMCJ48AHE3/57T has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value ensures downstream components see no more than 77.4 V during worst-case transient events, making it suitable for protecting 60 V-rated ICs in 48 V systems. The SMCJ48AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ48AHE3/57T qualified for automotive applications?
Yes, the SMCJ48AHE3/57T carries the HE3 suffix, indicating RoHS compliance and full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress testing (UHAST). This makes the SMCJ48AHE3/57T appropriate for under-hood and chassis-mounted automotive modules where reliability under thermal and mechanical stress is mandatory.
How does the SMCJ48AHE3/57T differ from the bidirectional SMCJ48CAHE3/57T?
The SMCJ48AHE3/57T is unidirectional, with cathode marked by a band and intended for DC rail protection where polarity is fixed. The SMCJ48CAHE3/57T is bidirectional, offering symmetrical clamping for AC or floating signals - but with identical VWM, VBR, and VC ratings. The SMCJ48AHE3/57T provides tighter parameter distribution and lower cost for unidirectional use cases; substituting the CA version adds unnecessary complexity unless polarity reversal is possible.
What is the recommended PCB layout for optimal thermal and surge performance of the SMCJ48AHE3/57T?
Vishay specifies mounting the SMCJ48AHE3/57T on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power. Thermal relief traces should be minimized; solid copper pours connected directly to both terminals improve heat dissipation and reduce inductance during surge events. The SMCJ48AHE3/57T must be placed as close as possible to the protected port to limit trace inductance that could elevate clamping voltage.
Does the SMCJ48AHE3/57T meet UL 497B recognition requirements?
Yes, the SMCJ48AHE3/57T is recognized by Underwriters Laboratories under file E136766 for both unidirectional and bidirectional variants, complying with UL 497B for telecommunications protectors. This certification confirms its suitability for use in UL-listed telecom equipment, PoE injectors, and network interface devices where third-party safety validation is required. The SMCJ48AHE3/57T carries QVGQ2 classification for protector applications.
SMCJ48AHE3/57T 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:
- 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)
SMCJ48AHE3/57T FAQ
1.How can I place an order for SMCJ48AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHE3/57T 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 SMCJ48AHE3/57T reliable?
The price and inventory of SMCJ48AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHE3/57T?
SMCJ48AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHE3/57T 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 SMCJ48AHE3/57T?
For technical support, including SMCJ48AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHE3/57T requirements.
6.How does Aetrix verify that SMCJ48AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHE3/57T 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 SMCJ48AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48AHE3/57T?
All SMCJ48AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHE3/57T, 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 SMCJ48AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ48AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHE3/57T Tags
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