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Vishay General Semiconductor - Diodes Division SMCJ48CAHE3_A/H
- Part No.:
- SMCJ48CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CAHE3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,095
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Product details
Overview
SMCJ48CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. 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 (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ48CAHE3_A/H datasheet, SMCJ48CAHE3_A/H pinout, SMCJ48CAHE3_A/H application, or SMCJ48CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding VWM (48 V), it avalanches symmetrically in both directions to clamp voltage at ≤77.4 V while diverting up to 19.4 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, critical for repeatable surge immunity in automotive-grade systems.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, the device meets MSL level 1 (260 °C peak reflow) and supports automated placement. Polarity-unmarked bidirectional construction eliminates orientation concerns during PCB assembly - unlike unidirectional variants that require cathode band alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 77.4 V - Clamped voltage at 19.4 A peak pulse; guarantees downstream ICs see ≤77.4 V during 10/1000 μs surges. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs derating requirements above 25 °C ambient. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements; required for ECU, ADAS, and body control units. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path during positive or negative voltage excursions beyond VWM. |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA devices; no functional distinction - terminals are interchangeable. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, infotainment, and ADAS sensor interfaces. |
| UL 497B recognition (QVGQ2) | Confirms compliance with safety standards for telecom and industrial surge protectors - simplifies system-level certification. |
| Low RθJL (15 °C/W) | Supports efficient heat transfer to PCB copper, maintaining clamping performance during repetitive surge events. |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity concerns - eliminates bake-out requirement pre-assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input rail to clamp surges before they reach DC/DC converters and microcontrollers. Use Value: Limits rail voltage to ≤77.4 V during 1500 W pulses, preventing latch-up or permanent damage to 5 V/3.3 V logic downstream. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional clamp on differential or single-ended sensor lines exposed to ESD and inductive switching noise. Use Value: Maintains signal integrity by suppressing ±15 kV ESD (IEC 61000-4-2) and 1 kV ring wave (IEC 61000-4-12) without polarity alignment errors. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of PoE-powered Ethernet switches and base station RF front-ends. IC Role / Device Role / Timing Role: Primary surge suppression on 48 V DC input lines prior to DC/DC isolation and data line ESD arrays. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W while meeting UL 497B Class B requirements for telecom infrastructure. | Use Scenario: Input-stage overvoltage protection in universal-input AC/DC adapters rated for 48 V output rails. IC Role / Device Role / Timing Role: Secondary-side clamp on regulated 48 V bus to absorb coupling transients from primary-side MOSFET switching. Use Value: Prevents overvoltage failure of GaN FETs and synchronous rectifiers by limiting bus excursions to 77.4 V during fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CAHE3_A/H | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM and VC. | Reduced surge energy handling; suitable only for lower-risk consumer or non-automotive applications. | Select when board space is constrained and surge threat level is below ISO 7637-2 Level III. |
| SMCJ48CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; used where halogen-free materials are mandated by OEM or regional regulations. | Choose for automotive Tier 1 supply chains requiring halogen-free bill-of-materials compliance. |
Compared with SMCJ48CAHE3_A/H, SMBJ48CAHE3_A/H trades surge robustness for footprint reduction, while SMCJ48CAHM3_A/H maintains full equivalence except for halogen-free material content - enabling direct substitution where environmental compliance is prioritized.
Availability
SMCJ48CAHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with AEC-Q101 assurance and UL recognition.
Supply support for SMCJ48CAHE3_A/H 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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered specifically for automotive, industrial, and telecom applications demanding AEC-Q101 qualification and UL 497B recognition.
FAQ
What is the clamping voltage of SMCJ48CAHE3_A/H at its rated peak pulse current?
The SMCJ48CAHE3_A/H has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A using a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry. The SMCJ48CAHE3_A/H maintains this clamping performance across its specified operating temperature range.
Is SMCJ48CAHE3_A/H qualified for automotive applications?
Yes, SMCJ48CAHE3_A/H is AEC-Q101 qualified, confirming its suitability for automotive electronic modules such as engine control units, body control modules, and ADAS sensor interfaces. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. This qualification covers stress tests including temperature cycling, humidity bias, and high-temperature operating life - all validated per the SMCJ family's automotive release documentation.
How does the bidirectional design of SMCJ48CAHE3_A/H affect PCB layout?
The bidirectional design of SMCJ48CAHE3_A/H eliminates polarity marking - both terminals are functionally identical, removing orientation constraints during placement. Unlike unidirectional TVS diodes, SMCJ48CAHE3_A/H requires no cathode band alignment, reducing assembly errors and enabling simplified routing on differential or floating lines. Its DO-214AB footprint remains unchanged from unidirectional variants, allowing shared land patterns in mixed-design boards.
What is the thermal resistance of SMCJ48CAHE3_A/H, and how does it impact derating?
SMCJ48CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. This value directly determines power derating above 25 °C ambient: for example, at 85 °C ambient, maximum allowable continuous power drops to approximately 3.5 W. Derating curves in Figure 2 of the datasheet document this relationship, ensuring reliable operation under sustained thermal stress.
Does SMCJ48CAHE3_A/H meet any safety certifications for surge protection systems?
Yes, SMCJ48CAHE3_A/H carries Underwriters Laboratories (UL) recognition under file number E136766 for both unidirectional and bidirectional devices, compliant with UL 497B for protectors. This certification validates its use in certified surge protection systems across telecom, industrial, and automotive applications. The UL mark applies to the entire SMCJ family, including SMCJ48CAHE3_A/H, and supports system-level safety approvals without additional component-level testing.
SMCJ48CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ48CAHE3_A/H FAQ
1.How can I place an order for SMCJ48CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CAHE3_A/H 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 SMCJ48CAHE3_A/H reliable?
The price and inventory of SMCJ48CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ48CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CAHE3_A/H?
SMCJ48CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CAHE3_A/H 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 SMCJ48CAHE3_A/H?
For technical support, including SMCJ48CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ48CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ48CAHE3_A/H 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 SMCJ48CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ48CAHE3_A/H?
All SMCJ48CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CAHE3_A/H, 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 SMCJ48CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ48CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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