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Vishay General Semiconductor - Diodes Division SMCJ48-E3/9AT
- Part No.:
- SMCJ48-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48-E3/9AT.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,817
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Product details
Overview
SMCJ48-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) 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), 77.4 V 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 SMCJ48-E3/9AT datasheet, SMCJ48-E3/9AT pinout, SMCJ48-E3/9AT application, or SMCJ48-E3/9AT equivalent, this device is selected for high-energy surge immunity in automotive power supplies, industrial sensor interfaces, and telecom line protection where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are critical.
Technical Context
The SMCJ48-E3/9AT operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR range (53.3–58.9 V), limiting transient energy by shunting surge current to ground. Its unidirectional polarity-marked with a cathode band-enables integration into DC-biased circuits without forward conduction during normal operation.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 1A whisker testing, confirming suitability for automated SMT assembly and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 53.3 V / 58.9 V - Breakdown initiates within this range at 1 mA test current |
| VC @ IPPM | 77.4 V - Clamped voltage across device at 19.4 A peak pulse current (10/1000 µs) |
| PPPM | 1500 W - Peak transient power it can absorb without failure |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off voltage ensures minimal standby loss |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive and industrial enclosures |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile, RoHS-compliant matte tin-plated leads. Molding compound meets UL 94 V-0. Cathode indicated by band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); band marks this end for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving system-level ESD and lightning surge margin |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow without popcorn or delamination risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and downstream DC/DC converter or microcontroller. Use Value: Limits transient voltage to ≤77.4 V, preventing damage to 60 V-rated MOSFETs and LDOs while sustaining 1500 W surges. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional-capable TVS not applicable; SMCJ48-E3/9AT used in unidirectional mode on biased signal returns. Use Value: Sub-1 ns response and <1.0 µA leakage preserve signal integrity and measurement accuracy in 24-bit ADC front-ends. |
| Telecom DC Feeder Line Protection | Renewable Energy Controller Input Protection |
Use Scenario: Safeguarding PoE-powered remote radios and base station control boards from induced lightning surges. IC Role / Device Role / Timing Role: First-line defense on 48 V DC feed lines upstream of isolation and regulation stages. Use Value: Withstands repeated 1500 W surges per IEC 61000-4-5 (Combination Wave) without parameter drift. | Use Scenario: Protecting solar charge controller inputs exposed to grid-switching transients and inductive kickback. IC Role / Device Role / Timing Role: Mounted directly at connector entry point on 48 V PV string interface. Use Value: 150 °C max junction rating supports operation in sealed outdoor enclosures with ambient temperatures up to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (80.0 V at 12.5 A) | Suitable for space-constrained consumer electronics; insufficient for automotive load dump | Select only if peak surge energy is ≤400 W and board area is critical |
| SMCJ48AHE3/9AT | Identical electrical specs but AEC-Q101 qualified (HE3 suffix), same DO-214AB package | Required for automotive OEM designs requiring full qualification documentation | Choose SMCJ48AHE3/9AT when AEC-Q101 certification is mandatory; SMCJ48-E3/9AT is commercial-grade |
Compared with SMAJ48A-E3/61T, the SMCJ48-E3/9AT delivers 275% higher surge power handling and lower clamping voltage, making it suitable for demanding industrial and automotive applications; versus SMCJ48AHE3/9AT, it shares identical performance but lacks formal AEC-Q101 documentation-ideal for cost-sensitive commercial systems where qualification is not required.
Availability
SMCJ48-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC feeder line protection requiring stable component supply, consistent tape-and-reel packaging (13" reel, 3500 pcs), and traceable lot-level compliance.
Supply support for SMCJ48-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in automotive, industrial, and telecom infrastructure where robustness against ISO 7637-2, IEC 61000-4-5, and lightning-induced surges is essential.
FAQ
What is the clamping voltage of the SMCJ48-E3/9AT and how is it measured?
The SMCJ48-E3/9AT has a maximum clamping voltage (VC) of 77.4 V, measured at 19.4 A peak pulse current (IPPM) using a standardized 10/1000 µs double-exponential surge waveform. This value reflects the actual voltage seen by downstream circuitry during worst-case transient events and is guaranteed per Vishay's datasheet revision 11-Dec-12 (Document Number: 88394). The SMCJ48-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ48-E3/9AT suitable for automotive applications?
The SMCJ48-E3/9AT is RoHS-compliant and manufactured in an AEC-Q101-qualified facility, but it carries the commercial-grade E3 suffix-not HE3-and therefore does not include formal AEC-Q101 certification documentation. For non-safety-critical automotive subsystems (e.g., infotainment power rails), the SMCJ48-E3/9AT may be used subject to internal validation; however, certified designs require SMCJ48AHE3/9AT. The SMCJ48-E3/9AT itself supports TJ = 150 °C and meets MSL Level 1.
What does the "-E3/9AT" suffix mean in SMCJ48-E3/9AT?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD201 Class 1A whisker resistance; "9AT" specifies packaging in 13-inch diameter plastic tape-and-reel format containing 3500 units. This differs from "57T" (7-inch reel, 850 units) and "HE3" (AEC-Q101 qualified version). The SMCJ48-E3/9AT uses the same DO-214AB package and electrical characteristics as other SMCJ48A variants, with no functional difference beyond qualification and packaging.
How does the SMCJ48-E3/9AT compare to bi-directional TVS diodes like SMCJ48CA?
The SMCJ48-E3/9AT is unidirectional and features a cathode band for polarity-sensitive placement on DC-biased lines; SMCJ48CA is bi-directional with no marking and symmetric clamping in both polarities. While both share identical VWM (48 V), VBR (53.3–58.9 V), and PPPM (1500 W), the SMCJ48-E3/9AT cannot protect AC or floating signals. Use SMCJ48-E3/9AT for 48 V supply rails; choose SMCJ48CA only for differential or AC-coupled data lines where bidirectional clamping is required.
What thermal derating applies to the SMCJ48-E3/9AT at elevated ambient temperatures?
The SMCJ48-E3/9AT must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (88394): at TA = 75 °C, its peak pulse power drops to ~75% of 1500 W (~1125 W), and at TA = 100 °C, it falls to ~50% (~750 W). Derating is based on junction-to-ambient thermal resistance (RθJA = 75 °C/W) and assumes mounting on 0.31" × 0.31" copper pads. The SMCJ48-E3/9AT remains functional up to TJ = 150 °C, but sustained high-temperature operation requires careful layout and thermal management.
SMCJ48-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ48-E3/9AT FAQ
1.How can I place an order for SMCJ48-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48-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 SMCJ48-E3/9AT reliable?
The price and inventory of SMCJ48-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 SMCJ48-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ48-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48-E3/9AT?
SMCJ48-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48-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 SMCJ48-E3/9AT?
For technical support, including SMCJ48-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48-E3/9AT requirements.
6.How does Aetrix verify that SMCJ48-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ48-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 SMCJ48-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ48-E3/9AT?
All SMCJ48-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48-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 SMCJ48-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ48-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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