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Vishay General Semiconductor - Diodes Division SMCJ48C-E3/57T
- Part No.:
- SMCJ48C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48C-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,061
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Product details
Overview
SMCJ48C-E3/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on signal or power lines. It features a 48 V stand-off voltage (VWM), 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used for protecting automotive sensor interfaces and industrial I/O lines against ESD and load dump.
For engineers reviewing the SMCJ48C-E3/57T datasheet, SMCJ48C-E3/57T pinout, SMCJ48C-E3/57T application, or SMCJ48C-E3/57T equivalent, key selection criteria include bi-directional clamping capability, 48 V working voltage compatibility, DO-214AB thermal performance (RθJA = 75 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The SMCJ48C-E3/57T operates as a bi-directional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its breakdown voltage (VBR) is specified between 53.3 V and 58.9 V at 1 mA test current, ensuring stable triggering across temperature and production lot.
It delivers 1500 W surge handling per 10/1000 µs waveform under standard mounting (8.0 mm × 8.0 mm copper pads), with thermal resistance of 75 °C/W junction-to-ambient and 15 °C/W junction-to-lead - enabling robust transient suppression in space-constrained surface-mount applications without active cooling.
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 at 1 mA - ensures reliable, repeatable avalanche turn-on across temperature and process variation |
| VC @ IPPM | 77.4 V at 19.4 A - defines worst-case clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-214AB (SMCJ) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and J-bend leads |
Pinout & Package
DO-214AB (SMCJ) package: low-profile, molded plastic case with two J-bend terminals; no polarity marking for bi-directional operation; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no orientation required during placement |
| Lead 1 | Terminal connection to silicon die | Provides mechanical anchoring and thermal path to PCB copper pad; requires minimum 8.0 mm × 8.0 mm copper area for rated PPPM |
| Lead 2 | Terminal connection to silicon die | Second thermal and electrical interface; symmetric layout enables uniform current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor protection |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - compatible with standard SMT reflow without dry pack or baking |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving protection margin |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector or IC input pins to limit transient excursions below IC absolute maximum ratings. Use Value: Enables compliance with ISO 16750-2 (load dump) and ISO 10605 (ESD) without additional series impedance or filtering components. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing multi-kW transients on 24 V DC field wiring before reaching optocoupler or microcontroller input stages. Use Value: Extends mean time between failures (MTBF) by preventing cumulative degradation of input protection networks in harsh factory environments. |
| Telecom Line Interface Protection | Consumer Appliance Power Supply Clamp |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at board edge, coordinated with GDT or MOV upstream for staged protection architecture. Use Value: Maintains signal integrity up to 25 Mbps while clamping transients to <80 V - within safe operating range of modern 3.3 V/5 V transceivers. | Use Scenario: Clamping overvoltage spikes on AC-DC converter secondary-side rails (e.g., 48 V output) caused by transformer leakage inductance or rectifier recovery. IC Role / Device Role / Timing Role: Secondary-side crowbar element that diverts surge energy away from downstream DC-DC regulators and load circuits. Use Value: Prevents catastrophic failure of electrolytic capacitors and MOSFETs during brown-out recovery or hot-plug events in white goods and HVAC systems. |
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-TB | Same VWM (48 V) and PPPM (1500 W), but TO-220AC package - larger footprint and higher RθJA (50 °C/W) | Requires heatsink for sustained surge duty; unsuitable for dense SMT layouts | Select when higher single-pulse energy margin is needed and board space allows through-hole mounting |
| 1.5KE48CA | Same bi-directional function and VWM, but axial DO-201 package - lower PPPM (1500 W same), higher RθJA (~65 °C/W), no AEC-Q101 qualification | Limited to commercial/industrial use; not validated for automotive temperature cycling or vibration | Select for cost-sensitive non-automotive designs where DO-201 form factor is preferred and qualification is not required |
Compared with SAC48C-TB and 1.5KE48CA, the SMCJ48C-E3/57T offers superior board-level integration via DO-214AB, guaranteed AEC-Q101 compliance, and optimized thermal performance for high-density automotive PCBs - making it the preferred choice where space, qualification, and reliability are co-constrained.
Availability
SMCJ48C-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply and full traceability.
Supply support for SMCJ48C-E3/57T 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, TVS devices, and optoelectronics 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 - balancing clamping performance, thermal robustness, and AEC-Q101 compliance.
FAQ
What does the "C" suffix indicate in SMCJ48C-E3/57T?
The "C" in SMCJ48C-E3/57T denotes bi-directional configuration, meaning the device clamps transients of either polarity symmetrically. Unlike uni-directional variants (e.g., SMCJ48A), the SMCJ48C-E3/57T has no cathode band marking and functions identically regardless of terminal orientation - critical for protecting AC-coupled or differential signal lines where polarity is undefined.
Is SMCJ48C-E3/57T RoHS compliant and lead-free?
Yes, SMCJ48C-E3/57T is RoHS compliant and lead-free. The "E3" suffix explicitly indicates Vishay's commercial-grade, RoHS-compliant construction per Directive 2011/65/EU, with matte tin-plated leads meeting J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance testing.
What is the maximum clamping voltage VC for SMCJ48C-E3/57T and how is it measured?
The maximum clamping voltage VC for SMCJ48C-E3/57T is 77.4 V, measured at 19.4 A peak pulse current (IPPM) using a 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and production lots, representing the worst-case voltage imposed on the protected circuit during standardized transient events per ANSI/IEEE C62.35.
Can SMCJ48C-E3/57T be used in place of SMCJ48A in a design?
No - SMCJ48C-E3/57T and SMCJ48A are not interchangeable without circuit review. SMCJ48A is uni-directional (cathode-marked, blocks forward current), while SMCJ48C-E3/57T is bi-directional (no marking, conducts in both directions). Substituting one for the other may cause unintended conduction or failed clamping in DC-biased applications.
Does SMCJ48C-E3/57T require derating at elevated ambient temperatures?
Yes, SMCJ48C-E3/57T must be derated above TA = 25 °C. Per Figure 2 in the datasheet, its peak pulse power (PPPM) decreases linearly: at 85 °C ambient, PPPM drops to ~850 W; at 125 °C, it falls to ~450 W. Designers must verify clamping performance under worst-case operating temperature using the published derating curve.
SMCJ48C-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/57T FAQ
1.How can I place an order for SMCJ48C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48C-E3/57T 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 SMCJ48C-E3/57T reliable?
The price and inventory of SMCJ48C-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48C-E3/57T?
SMCJ48C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48C-E3/57T 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 SMCJ48C-E3/57T?
For technical support, including SMCJ48C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48C-E3/57T requirements.
6.How does Aetrix verify that SMCJ48C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48C-E3/57T 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 SMCJ48C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48C-E3/57T?
All SMCJ48C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48C-E3/57T, 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 SMCJ48C-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ48C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48C-E3/57T Tags
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