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Vishay General Semiconductor - Diodes Division SMCJ48AHE3_A/H
- Part No.:
- SMCJ48AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHE3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,800
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Product details
Overview
SMCJ48AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) 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) at 1 mA, 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 power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ48AHE3_A/H datasheet, SMCJ48AHE3_A/H pinout, SMCJ48AHE3_A/H application, or SMCJ48AHE3_A/H equivalent, key selection criteria include clamping performance under 19.4 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48AHE3_A/H operates as a silicon avalanche diode, leveraging glass-passivated junction technology to deliver sub-nanosecond response to transients. Its unidirectional configuration provides cathode-banded polarity with reverse-biased operation during overvoltage events, enabling precise clamping without forward conduction during normal operation.
It is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is AEC-Q101 qualified (indicated by HE3 suffix), RoHS-compliant, and features matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
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 turn-on within defined tolerance band |
| VC @ IPPM | 77.4 V at 19.4 A - limits downstream voltage stress during 10/1000 µs surge event |
| PPPM | 1500 W - peak transient energy absorption capability under standardized waveform |
| TJ max | +150 °C - supports operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 75 °C/W - defines thermal derating slope when mounted on minimum recommended PCB copper area |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with cathode band marking on unidirectional variants. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); terminals are matte tin-plated for lead-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or return path; forms current path during reverse-biased clamping |
| Cathode | High-side connection | Marked with band; connects to protected line (e.g., 48 V rail); conducts avalanche current to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and body modules |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| MSL Level 1 rating | Enables single-reflow assembly without baking; compatible with standard SMT lines up to 260 °C peak |
| 1500 W peak pulse power | Protects against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges in 24/48 V systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (< 1 ns response) |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 48 V battery-fed ADAS camera module exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp transients before LDO regulator input. Use Value: Limits voltage to ≤77.4 V during 19.4 A surge, preventing damage to 50 V-rated input capacitors and PMICs. | Use Scenario: RS-485 bus interface in factory automation PLC communicating with remote temperature sensors. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMCJ48AHE3_A/H is unidirectional) used on VCC line; here, unidirectional variant protects 48 V bias supply feeding isolated transceivers. Use Value: Clamps induced lightning-induced surges on 48 V bias rail to safe levels while maintaining <1 µA leakage at 48 V. |
| Telecom DC Power Feeds | Renewable Energy Charge Controller Inputs |
Use Scenario: 48 V telecom rectifier output feeding distributed baseband units in outdoor cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC distribution rail upstream of point-of-load converters. Use Value: Absorbs 1500 W surge energy from induced lightning transients without degradation across >1000 events. | Use Scenario: Solar charge controller accepting variable input from 48 V nominal battery bank subject to switching transients from MPPT FETs. IC Role / Device Role / Timing Role: Rail protector on battery input terminal to prevent overvoltage damage during MOSFET commutation. Use Value: Withstands repeated 19.4 A surges at 77.4 V clamping, preserving electrolytic capacitor life and MCU reset integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3_A/H | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge handling; suitable only for lower-energy threats (e.g., ESD-only zones) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±15 kV contact |
| SMCJ48CAHE3_A/H | Bidirectional variant; identical VWM (48 V), symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for RS-485 data lines or transformer-coupled interfaces needing bidirectional protection |
Compared with SMCJ48AHE3_A/H, SMBJ48AHE3_A/H offers footprint reduction at the cost of 60 % lower surge capacity, while SMCJ48CAHE3_A/H enables polarity-agnostic protection but requires verification of system grounding topology to avoid unintended conduction paths.
Availability
SMCJ48AHE3_A/H is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line protection, and telecom DC power feed applications requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCJ48AHE3_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, TVS, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ48AHE3_A/H at its rated peak pulse current?
The SMCJ48AHE3_A/H has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM), measured under the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on the protected circuit during worst-case surge events and is guaranteed across the full operating temperature range of -55 °C to +150 °C. The SMCJ48AHE3_A/H maintains this clamping performance due to its low incremental surge resistance and stable avalanche characteristics.
Is SMCJ48AHE3_A/H qualified for automotive use?
Yes, SMCJ48AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and documentation in Vishay's SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making the SMCJ48AHE3_A/H suitable for under-hood and chassis-mounted automotive applications such as body control modules and ADAS power supplies.
What does the "_A/H" suffix mean in SMCJ48AHE3_A/H?
The "_A/H" suffix in SMCJ48AHE3_A/H indicates packaging configuration: "A" denotes the revision level (per Vishay's internal revision coding), and "H" specifies the preferred package code for 7-inch plastic tape-and-reel delivery with 850 units per reel. This matches the ordering information table in the datasheet, where SMCJ48AHE3_A/H is explicitly listed with unit weight 0.211 g and delivery mode "7\" diameter plastic tape and reel".
How does SMCJ48AHE3_A/H differ from SMCJ48CAHE3_A/H?
SMCJ48AHE3_A/H is unidirectional, with cathode band marking and clamping only in reverse bias, whereas SMCJ48CAHE3_A/H is bidirectional - offering symmetrical clamping for both polarities without polarity marking. Both share identical VWM (48 V), VBR (53.3–58.9 V), and VC (77.4 V) ratings, but SMCJ48CAHE3_A/H is required for AC-coupled or floating nodes. The SMCJ48AHE3_A/H must be oriented correctly in-circuit to avoid forward conduction during normal operation.
What PCB pad layout is recommended for optimal thermal performance of SMCJ48AHE3_A/H?
Vishay specifies mounting the SMCJ48AHE3_A/H on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated power dissipation and thermal resistance (RθJA = 75 °C/W). These pads must be connected to internal ground/power planes via multiple thermal vias to minimize junction temperature rise during surge events. Deviation from this layout reduces PPPM capability and accelerates thermal derating above 25 °C ambient - directly impacting SMCJ48AHE3_A/H reliability in sustained surge conditions.
SMCJ48AHE3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ48AHE3_A/H FAQ
1.How can I place an order for SMCJ48AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHE3_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 SMCJ48AHE3_A/H reliable?
The price and inventory of SMCJ48AHE3_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 SMCJ48AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ48AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHE3_A/H?
SMCJ48AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHE3_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 SMCJ48AHE3_A/H?
For technical support, including SMCJ48AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ48AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHE3_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 SMCJ48AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ48AHE3_A/H?
All SMCJ48AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHE3_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 SMCJ48AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ48AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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