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Vishay General Semiconductor - Diodes Division SMCJ48C-E3/9AT
- Part No.:
- SMCJ48C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48C-E3/9AT.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,038
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Product details
Overview
SMCJ48C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection on signal and power lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown range (VBR), 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ48C-E3/9AT datasheet, SMCJ48C-E3/9AT pinout, SMCJ48C-E3/9AT application, or SMCJ48C-E3/9AT equivalent, key selection criteria include bi-directional clamping symmetry, AEC-Q101 qualification, UL 497B recognition, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48C-E3/9AT operates as a bi-directional avalanche diode, exhibiting symmetrical reverse/forward clamping behavior with no polarity marking. Its glass-passivated junction enables fast response (<1 ns) to transients induced by inductive switching or ESD events, while maintaining low incremental surge resistance and stable clamping under repetitive surge conditions per IEC 61000-4-5.
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with RθJA = 75 °C/W (on recommended pad layout) and RθJL = 15 °C/W. It is rated for non-repetitive 8.3 ms half-sine surge up to 200 A (uni-directional only) and meets J-STD-020 MSL Level 1 reflow profile (peak 260 °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 at 1 mA - Ensures reliable avalanche conduction onset across production lot |
| VC @ IPPM | 77.4 V at 19.4 A - Limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 1500 W - Withstands high-energy transients common in automotive load-dump and ISO 7637-2 pulses |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| MSL Level | Level 1 per J-STD-020 - No dry-pack or bake required prior to reflow soldering |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTGB, TCT, and HTRB testing |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bi-directional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals - either end serves as anode or cathode depending on transient polarity; no band marking |
| Case (body) | Thermal and mechanical interface | DO-214AB molded body provides UL 94 V-0 flammability rating and thermal path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| UL 497B recognition (QVGQ2) | Validated for telecom and industrial surge protector classification per Underwriters Laboratories |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Confirms suitability for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Low-profile SMCJ package | Supports high-density PCB layouts and automated pick-and-place with 0.211 g unit weight |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Standby clamping device placed directly at connector entry point to shunt surge energy before reaching sensitive ICs. Use Value: Clamps 1500 W surges to ≤77.4 V, preventing latch-up or permanent damage to 5 V or 12 V rail-connected ASICs. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced transients from relay coils or motor drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance and filtering. Use Value: Maintains <1 µA leakage at 48 V VWM to avoid false triggering, while responding in <1 ns to fast-rising spikes. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Protecting Ethernet PHY front-end and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs, used alongside gas discharge tubes and common-mode chokes. Use Value: Symmetrical bi-directional clamping ensures equal protection on both line polarities without polarity alignment errors. | Use Scenario: Input-stage surge suppression in USB-C PD adapters and AC/DC wall adapters exposed to mains-borne transients. IC Role / Device Role / Timing Role: First-line transient suppressor after bridge rectifier, absorbing residual energy not filtered by X/Y capacitors. Use Value: 1500 W PPPM rating handles combination wave (1.2/50 µs voltage + 8/20 µs current) surges per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC48C | Lower PPPM (600 W), same VWM (48 V), smaller DO-214AC (SMA) package | Not AEC-Q101 qualified; limited to consumer/industrial, not automotive | Select when board space is constrained and surge energy is ≤600 W |
| SMCJ48CAHE3/9AT | Identical electrical specs; HE3 suffix denotes AEC-Q101 qualification and JESD 201 Class 2 whisker resistance | Same automotive use cases but enhanced process control for mission-critical modules | Select when full AEC-Q101 traceability and whisker mitigation are mandated |
Compared with SAC48C, SMCJ48C-E3/9AT delivers 2.5× higher surge power handling and automotive qualification; compared with SMCJ48CAHE3/9AT, it shares identical clamping performance but uses JESD 201 Class 1A whisker test instead of Class 2 - suitable for most automotive tiers where Class 1A suffices.
Availability
SMCJ48C-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface, and telecom line interface requiring stable component supply and AEC-Q101-compliant surge suppression.
Supply support for SMCJ48C-E3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
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 infrastructure.
FAQ
What is the clamping voltage of the SMCJ48C-E3/9AT under a 10/1000 µs surge?
The SMCJ48C-E3/9AT has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM) under 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 - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ48C-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ48C-E3/9AT suitable for automotive applications?
Yes, the SMCJ48C-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and infotainment power supplies. Its construction - glass-passivated junction, DO-214AB package with MSL Level 1, and UL 497B recognition - meets stringent automotive reliability requirements. The SMCJ48C-E3/9AT is validated for thermal cycling, humidity, and surge endurance per AEC-Q101 test plans.
Does the SMCJ48C-E3/9AT have polarity markings?
No, the SMCJ48C-E3/9AT is a bi-directional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical construction allows either terminal to serve as anode or cathode depending on transient polarity, eliminating orientation errors during automated assembly. This contrasts with uni-directional variants like SMCJ48A, which feature a visible band denoting the cathode end.
What is the thermal resistance of the SMCJ48C-E3/9AT?
The SMCJ48C-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal, and a junction-to-lead resistance (RθJL) of 15 °C/W. These values determine steady-state power dissipation limits and transient thermal response - essential for calculating safe operating area during repeated surge events. The SMCJ48C-E3/9AT must be applied with adequate PCB copper area to maintain TJ ≤ 150 °C.
How does the SMCJ48C-E3/9AT differ from the SMCJ48A variant?
The SMCJ48C-E3/9AT is bi-directional with symmetrical clamping in both polarities and no polarity marking, whereas the SMCJ48A is uni-directional with a cathode band and forward conduction capability. Electrically, SMCJ48A specifies VF = 3.5 V at 100 A (forward), while SMCJ48C-E3/9AT does not define forward voltage. Both share identical VWM (48 V), PPPM (1500 W), and package (DO-214AB), but only SMCJ48C-E3/9AT is appropriate for AC or floating signal line protection.
SMCJ48C-E3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ48C-E3/9AT FAQ
1.How can I place an order for SMCJ48C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48C-E3/9AT 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 SMCJ48C-E3/9AT reliable?
The price and inventory of SMCJ48C-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ48C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48C-E3/9AT?
SMCJ48C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48C-E3/9AT 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 SMCJ48C-E3/9AT?
For technical support, including SMCJ48C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ48C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ48C-E3/9AT 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 SMCJ48C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ48C-E3/9AT?
All SMCJ48C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48C-E3/9AT, 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 SMCJ48C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ48C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48C-E3/9AT Tags
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