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Vishay General Semiconductor - Diodes Division SMBG48A-E3/52
- Part No.:
- SMBG48A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48A-E3/52.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG48A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR at 1 mA), 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SMBG48A-E3/52 datasheet, SMBG48A-E3/52 pinout, SMBG48A-E3/52 application, or SMBG48A-E3/52 equivalent, key selection criteria include clamping voltage (77.4 V at IPPM), low incremental surge resistance, AEC-Q101 qualification, and unidirectional polarity with cathode band marking - all critical for robust ESD and surge protection in automotive-grade PCB designs.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its specified VBR, limiting transient energy to safe levels across protected circuit nodes. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads per terminal, it delivers 600 W peak pulse power handling with 0.01% duty cycle, thermal resistance RθJA = 100 °C/W, and operating junction temperature range of –55 °C to +150 °C - enabling use in high-temperature engine bay and powertrain electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before clamping begins; defines upper limit of normal operating range. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamping voltage under 600 W 10/1000 µs surge; determines maximum voltage seen by downstream ICs. |
| IPPM | 7.8 A - Peak pulse current capability; defines maximum transient energy the device can safely shunt. |
| PPPM | 600 W - Peak pulse power rating; validates suitability for automotive load-dump and ISO 7637-2 pulse 1/2/5a protection. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood environments without derating. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components, including temperature cycling and HTRB. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leadform with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode during transients. |
| Cathode | Reverse voltage input / Surge current sink | Connected to protected line (e.g., sensor supply or CAN bus); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with ISO 7637-2 Pulse 5a (load dump) up to 12 V system level without external series impedance. |
| AEC-Q101 qualified | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during clamping, reducing stress on downstream 5 V or 3.3 V logic interfaces. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-related delamination or popcorn failure. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control modules exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VOUT and ground, conducting only during negative-going transients relative to ground. Use Value: Limits voltage to ≤77.4 V during 600 W surges, preventing damage to 12-bit ADC inputs and op-amp front-ends rated for ±80 V absolute maximum. | Use Scenario: Shielding digital I/O lines (e.g., enable/disable signals) in variable-frequency drives from switching noise and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector on 24 V control rails, absorbing repetitive 10/1000 µs transients generated by contactor switching. Use Value: Maintains signal integrity by clamping spikes within 1 ns response time while sustaining 100 A non-repetitive forward surge (IFSM) during fault conditions. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Safeguarding 48 V DC power input stage of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail upstream of DC-DC converter, configured unidirectionally with cathode to rail. Use Value: Withstands 600 W pulses without degradation, meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω) requirements when paired with appropriate series impedance. | Use Scenario: Protecting microcontroller GPIOs driving relays or triacs in smart washing machine control boards subject to motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS on each switched 12 V output line, placed adjacent to driver IC output pins. Use Value: Provides <1 ns response and 77.4 V clamping to prevent latch-up in 3.3 V MCU I/O cells, validated per JEDEC JESD22-A114 for ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-E3/52 | Same VWM (48 V), but lower PPPM = 600 W (identical), higher VC = 77.4 V (same), yet uses SMB (DO-214AA) package with larger footprint and higher RθJA (110 °C/W). | Less suitable for space-constrained automotive modules where SMBG's smaller DO-215AA outline saves board area. | Select SMBG48A-E3/52 when PCB real estate is limited and thermal performance on small pads must be maximized. |
| SMCJ48A-E3/52 | Same VWM and VBR, but higher PPPM = 1500 W, larger SMC (DO-214AB) package, and higher IPPM = 19.9 A. | Over-specified for typical sensor-line protection; requires larger pad layout and increases cost without benefit in low-energy transient scenarios. | Choose SMBG48A-E3/52 for cost-sensitive, space-limited 600 W protection where SMCJ's extra margin adds no functional advantage. |
Compared with SMBJ48A-E3/52 and SMCJ48A-E3/52, SMBG48A-E3/52 delivers identical electrical protection in a smaller, thermally optimized package - making it the preferred choice for high-density automotive and industrial PCBs requiring AEC-Q101 compliance without over-engineering.
Availability
SMBG48A-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O safeguarding, and telecom power interface surge suppression requiring stable component supply and full traceability.
Supply support for SMBG48A-E3/52 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 and automotive-grade qualification.
The SMBG TransZORB® series is engineered specifically for high-reliability transient suppression in space-constrained, thermally demanding environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBG48A-E3/52 at its rated peak pulse current?
The SMBG48A-E3/52 has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 7.8 A under a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The SMBG48A-E3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMBG48A-E3/52 suitable for automotive applications?
Yes, SMBG48A-E3/52 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, ADAS sensors, and body electronics. Its construction features glass-passivated junctions, MSL Level 1 reflow compatibility, and operation up to +150 °C junction temperature - all verified per AEC stress test requirements. The SMBG48A-E3/52 meets these qualifications without derating in typical under-hood thermal environments.
What does the "-E3/52" suffix indicate in SMBG48A-E3/52?
The "-E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "/52" specifies packaging in 7-inch diameter plastic tape and reel with a base quantity of 750 units. This configuration ensures compatibility with automated SMT placement equipment and satisfies IPC/JEDEC standards for solderability and whisker resistance. The SMBG48A-E3/52 ordering code reflects both environmental compliance and logistics readiness.
How does SMBG48A-E3/52 differ from bidirectional TVS diodes like SMBG48CA?
SMBG48A-E3/52 is unidirectional and features a cathode band marking, allowing conduction only in reverse bias - ideal for DC rail protection where polarity is fixed. In contrast, SMBG48CA is bidirectional with no polarity marking and symmetric clamping in both directions, suited for AC or differential signal lines. The SMBG48A-E3/52 offers lower leakage and tighter VBR tolerance than its CA counterpart, enhancing precision in DC-coupled protection schemes.
What is the thermal resistance of SMBG48A-E3/52, and how does it affect layout design?
The SMBG48A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly informs PCB layout: reducing pad size or omitting thermal vias increases junction temperature rise during surge events. To maintain reliability, designers must adhere to the recommended pad dimensions and ensure adequate copper area - especially critical for repeated surge exposure in automotive applications using SMBG48A-E3/52.
SMBG48A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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):
- 7.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBG)
SMBG48A-E3/52 FAQ
1.How can I place an order for SMBG48A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48A-E3/52 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 SMBG48A-E3/52 reliable?
The price and inventory of SMBG48A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG48A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG48A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48A-E3/52?
SMBG48A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48A-E3/52 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 SMBG48A-E3/52?
For technical support, including SMBG48A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48A-E3/52 requirements.
6.How does Aetrix verify that SMBG48A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG48A-E3/52 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 SMBG48A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG48A-E3/52?
All SMBG48A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48A-E3/52, 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 SMBG48A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG48A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48A-E3/52 Tags
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