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Vishay General Semiconductor - Diodes Division SMBJ48AHE3_B/H
- Part No.:
- SMBJ48AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHE3_B/H.pdf
- Description:
- 600W,48V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,341
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Product details
Overview
SMBJ48AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power 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 7.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMBJ48AHE3_B/H datasheet, SMBJ48AHE3_B/H pinout, SMBJ48AHE3_B/H application, or SMBJ48AHE3_B/H equivalent, this device serves as a robust, AEC-Q101-qualified transient protector for 48 V nominal systems requiring low-leakage (<1.0 µA), fast-response (<1 ns), and high-surge-current capability in compact SMB footprint.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp: reverse-biased during normal operation (blocking up to 48 V), then rapidly avalanching into low-impedance conduction when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling consistent clamping performance across repetitive surges.
Designed for PCB-level protection of DC power inputs and analog/sensor signal paths, it complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements when used with appropriate layout (e.g., short trace lengths, dedicated ground plane). Thermal resistance RθJA = 100 °C/W supports operation up to +150 °C junction temperature under defined pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before leakage rises above 1.0 µA; defines safe DC working range for 48 V supply rails. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown threshold window; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 600 W, 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W - Peak pulse power handling per single 10/1000 µs transient; validated with 0.01% duty cycle repetition. |
| IFSM | 100 A - Non-repetitive 8.3 ms half-sine surge current rating; supports high-energy load dump events in automotive. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood or industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-impedance reference; completes clamping loop during transient. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to protected node (e.g., 48 V rail or signal line); blocks VWM, conducts when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and body modules requiring long-term reliability under thermal and mechanical stress. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients such as ISO 7637-2 Load Dump pulses without degradation or failure. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to downstream components - critical for protecting 60 V-rated MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| 1.0 µA max reverse leakage @ VWM | Prevents excessive standby current drain in battery-powered or always-on industrial sensors and gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs and ADAS domain controllers against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 48 V input and chassis ground to limit surge voltage to <77.4 V. Use Value: Enables compliance with ISO 16750-2 Pulse 5a/b while preserving 60 V-rated power management ICs and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital sensor interfaces (I²C, SPI) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to shunt ESD and inductive switching noise. Use Value: Prevents latch-up or damage to precision ADCs and microcontroller GPIOs without distorting signal integrity (CJ < 100 pF). |
| Telecom DC Power Input Protection | Consumer Equipment AC/DC Adapter Output Protection |
|
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges and hot-swap transients in base station power supplies. IC Role / Device Role / Timing Role: Primary clamping device on -48 V bus, coordinated with upstream fuses and secondary filtering. Use Value: Maintains system uptime by absorbing 600 W surges without catastrophic failure, supporting GR-1089-CORE compliance. |
Use Scenario: Adding surge resilience to USB PD and 48 V GaN adapter outputs feeding laptops and monitors. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output rail to suppress coupling from internal switching noise or external cable discharge. Use Value: Eliminates need for costly post-regulation filtering while meeting UL 62368-1 transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU medical or public infrastructure projects). | Choose SMBJ48AHM3_B/H when halogen-free bill-of-materials is required; otherwise SMBJ48AHE3_B/H offers standard RoHS compliance. |
| SMAJ48A-E3/52 | Same VWM/VC but lower PPPM (400 W), smaller SMA (DO-214AC) package, non-AEC-Q101 rated. | Limited to commercial-grade applications with lower surge energy expectations (e.g., consumer adapters, non-automotive IoT). | Select SMAJ48A-E3/52 only for cost-sensitive, space-constrained designs where 400 W surge rating suffices and automotive qualification is unnecessary. |
Compared with SMBJ48AHM3_B/H, SMBJ48AHE3_B/H provides identical protection performance with standard RoHS compliance; versus SMAJ48A-E3/52, it delivers +50% surge power headroom and automotive-grade reliability - critical for mission-critical 48 V systems.
Availability
SMBJ48AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power systems, and consumer power adapter designs requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ48AHE3_B/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 devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed to deliver high-power, low-clamping TVS protection in compact surface-mount packages for automotive, industrial, and telecom applications demanding AEC-Q101 validation and robust surge immunity.
FAQ
What is the clamping voltage of SMBJ48AHE3_B/H at its rated peak pulse current?
The SMBJ48AHE3_B/H has a maximum clamping voltage (VC) of 77.4 V at its specified peak pulse current (IPPM) of 7.8 A, measured using the standardized 10/1000 µs waveform. This value ensures protected circuitry remains below critical overvoltage thresholds during surge events, and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2.
Is SMBJ48AHE3_B/H qualified for automotive applications?
Yes, SMBJ48AHE3_B/H is AEC-Q101 qualified, as explicitly stated in the Vishay ordering information table (page 3) and mechanical data section. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD - making SMBJ48AHE3_B/H suitable for engine control, ADAS, and body electronics in passenger and commercial vehicles.
What does the "HE3" suffix indicate in SMBJ48AHE3_B/H?
The "HE3" suffix in SMBJ48AHE3_B/H denotes a RoHS-compliant, AEC-Q101-qualified version with standard tin plating. Per Vishay's documentation (page 1), "Base P/NHE3_X" indicates RoHS compliance plus AEC-Q101 qualification, where "_B/H" specifies packaging: 7″ tape-and-reel, 750 units per reel, with H as the preferred package code.
How does SMBJ48AHE3_B/H differ from bidirectional variants like SMBJ48CA?
SMBJ48AHE3_B/H is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward protected line), whereas SMBJ48CA is bidirectional and symmetrical - suitable for AC lines or differential signals. Electrical differences include higher VBR tolerance (±5%) for unidirectional types and distinct ID limits; SMBJ48AHE3_B/H supports 1.0 µA leakage at 48 V, while SMBJ48CA has doubled ID limit per note (3) in the datasheet.
What is the thermal resistance of SMBJ48AHE3_B/H, and how does it affect PCB layout?
SMBJ48AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2″ × 0.2″ copper pads per terminal (per datasheet page 3). To maintain safe junction temperatures under repeated surges, designers must provide adequate copper area and avoid thermal bottlenecks - undersized traces or insufficient ground planes will cause localized heating and premature failure of SMBJ48AHE3_B/H.
SMBJ48AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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):
- 7.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ48AHE3_B/H FAQ
1.How can I place an order for SMBJ48AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHE3_B/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 SMBJ48AHE3_B/H reliable?
The price and inventory of SMBJ48AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ48AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHE3_B/H?
SMBJ48AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHE3_B/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 SMBJ48AHE3_B/H?
For technical support, including SMBJ48AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ48AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHE3_B/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 SMBJ48AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ48AHE3_B/H?
All SMBJ48AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHE3_B/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 SMBJ48AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ48AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHE3_B/H Tags
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