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Vishay General Semiconductor - Diodes Division SMCJ48CHE3/9AT
- Part No.:
- SMCJ48CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CHE3/9AT.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,363
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Product details
Overview
SMCJ48CHE3/9AT from Vishay General Semiconductor is a surface-mount transient voltage suppressor (TVS) diode designed for bi-directional overvoltage protection in power and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps transients to ≤77.4 V at 19.4 A, making it suitable for automotive electronics and industrial power supply rail protection.
For engineers reviewing the SMCJ48CHE3/9AT datasheet, SMCJ48CHE3/9AT pinout, SMCJ48CHE3/9AT application, or SMCJ48CHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AB (SMCJ) package, low incremental surge resistance, fast response time, and bi-directional clamping capability for ESD and load-switching transient suppression.
Technical Context
The SMCJ48CHE3/9AT operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, meeting ANSI/IEEE C62.35 standards for transient suppression. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for mounting on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power (10/1000 µs waveform) with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling robust operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 77.4 V - Clamped voltage at 19.4 A peak pulse current, limiting downstream voltage stress |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized 10/1000 µs surge |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | DO-214AB (SMCJ) - Surface-mount outline with J-bend leads, MSL Level 1, 260 °C reflow compatible |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
SMCJ48CHE3/9AT uses the DO-214AB (SMCJ) package: a surface-mount, bi-directional device with no polarity marking; both terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally during positive or negative overvoltage events; no cathode band marking |
| Case (exposed lead frame) | Thermal and mechanical interface | Integral lead frame provides primary heat dissipation path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term surge endurance across temperature and life cycles |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow assembly without preconditioning or special handling |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS subsystems requiring high-reliability TVS protection |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery rail inputs in vehicle ECUs against load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤77.4 V during 1500 W surges, preventing damage to downstream 60 V-rated MOSFETs and regulators. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to relay-induced switching noise. IC Role / Device Role / Timing Role: Bi-directional shunt protector on differential or single-ended signal lines interfacing with PLC I/O modules. Use Value: Responds in <1 ps to clamp ±1 kV EFT bursts (IEC 61000-4-4), preserving signal integrity and ADC accuracy. |
| Telecom Line Card Surge Protection | Consumer Device USB/Power Port Protection |
Use Scenario: Front-end protection of PoE-powered line cards in enterprise switches subjected to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after gas discharge tube (GDT) primary protection. Use Value: Provides low-clamp secondary protection with 77.4 V VC, ensuring compliance with GR-1089-CORE Level 4 surge immunity. | Use Scenario: Overvoltage safeguard for USB-C PD input ports in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Bi-directional rail clamp between input connector and buck converter input capacitor. Use Value: Absorbs 1500 W surges while maintaining 48 V nominal operation, preventing latch-up in USB PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3/9AT | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR range | Suitable only for lower-energy transients; not recommended for ISO 16750-2 load dump | Select when board space is constrained and peak surge energy is ≤400 W |
| SMCJ48CAHE3/9AT | Identical electrical specs and package; CA suffix explicitly denotes bi-directional version (SMCJ48CHE3/9AT is functionally equivalent per Vishay documentation) | No functional difference; CA is standard bi-directional designation, HE3 confirms AEC-Q101 | Preferred for new designs where part numbering follows Vishay's canonical bi-directional nomenclature |
Compared with SMAJ48AHE3/9AT, SMCJ48CHE3/9AT delivers 3.75× higher surge power handling and superior thermal dissipation via larger DO-214AB footprint; versus SMCJ48CAHE3/9AT, it is a documented variant with identical performance and qualification-differing only in internal marking code per ordering matrix.
Availability
SMCJ48CHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, telecom infrastructure, and consumer device protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCJ48CHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in harsh environments including automotive, industrial, and telecom applications.
FAQ
What is the clamping voltage of SMCJ48CHE3/9AT at its rated peak pulse current?
The SMCJ48CHE3/9AT clamps to a maximum of 77.4 V at its specified peak pulse current of 19.4 A (10/1000 µs waveform). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ48CHE3/9AT maintains this clamping performance consistently across its qualified operating temperature range.
Is SMCJ48CHE3/9AT suitable for automotive applications?
Yes, SMCJ48CHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS subsystems. Its DO-214AB package, 150 °C maximum junction temperature, and validated surge endurance per ISO 16750-2 make it appropriate for under-hood and chassis-mounted applications. The SMCJ48CHE3/9AT meets all required stress tests including temperature cycling, high-temperature reverse bias, and repetitive surge.
What does the "HE3" suffix indicate in SMCJ48CHE3/9AT?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. The "H" signifies automotive grade (AEC-Q101), "E3" indicates matte tin plating compliant with J-STD-002 and JESD 22-B102 solderability standards. This distinguishes SMCJ48CHE3/9AT from commercial-grade "E3" variants and confirms its suitability for mission-critical automotive designs.
How does SMCJ48CHE3/9AT differ from uni-directional SMCJ48A variants?
SMCJ48CHE3/9AT is bi-directional with symmetrical clamping in both polarities and no polarity marking, whereas uni-directional SMCJ48A has a cathode band and conducts only in reverse bias. The SMCJ48CHE3/9AT supports AC-coupled or floating circuits without orientation constraints, while SMCJ48A requires correct anode/cathode placement and cannot protect against positive-going transients on the anode side.
What is the thermal resistance of SMCJ48CHE3/9AT, and how does it affect layout?
SMCJ48CHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To achieve rated power dissipation, the PCB must provide minimum 8.0 mm × 8.0 mm copper pads per terminal as specified in the datasheet. Reducing pad size increases thermal impedance, derating peak pulse power and risking thermal runaway during repeated surges. The SMCJ48CHE3/9AT relies on copper area-not just trace width-for effective heat spreading.
SMCJ48CHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 17.5A
- 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)
SMCJ48CHE3/9AT FAQ
1.How can I place an order for SMCJ48CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CHE3/9AT 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 SMCJ48CHE3/9AT reliable?
The price and inventory of SMCJ48CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ48CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CHE3/9AT?
SMCJ48CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CHE3/9AT 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 SMCJ48CHE3/9AT?
For technical support, including SMCJ48CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ48CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ48CHE3/9AT 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 SMCJ48CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ48CHE3/9AT?
All SMCJ48CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CHE3/9AT, 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 SMCJ48CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ48CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48CHE3/9AT Tags
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