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Vishay General Semiconductor - Diodes Division SMBG48A-E3/5B
- Part No.:
- SMBG48A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48A-E3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,567
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Product details
Overview
SMBG48A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 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 on automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMBG48A-E3/5B datasheet, SMBG48A-E3/5B pinout, SMBG48A-E3/5B application, or SMBG48A-E3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant packaging details for rapid design-in and reliability validation.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp during voltage transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 600 W peak pulse power rating is specified under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and it maintains stable clamping performance across –55 °C to +150 °C operating junction temperature.
The device is rated for 100 A non-repetitive forward surge current (IFSM) per 8.3 ms half-sine wave, supports automated SMT placement via matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on within ±5% tolerance for reliable transient detection. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during full-rated 600 W transient; limits downstream IC stress below 80 V in protected circuits. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; enables suppression of high-energy ESD and load-dump events. |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); supports protection against automotive load dump per ISO 7637-2. |
| TJ Range | –55 °C to +150 °C - Full automotive-grade junction temperature range; validated for under-hood and industrial control environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing leaded case with cathode band marking. Dimensions: 6.48 mm × 3.94 mm × 2.10 mm (L × W × H), compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or lower-potential rail. | Provides reference node for clamping action; must be routed with low-inductance path to ground plane. |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line. | Defines polarity-sensitive connection point - reversal causes failure to clamp transients on positive-going surges. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics per stress test requirements. |
| Glass passivated junction | Ensures long-term stability and moisture resistance; eliminates risk of junction corrosion in humid or condensing environments. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without preconditioning; compatible with standard lead-free reflow profiles. |
| 600 W 10/1000 µs rating | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and telecom equipment interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes protective voltage overshoot relative to breakdown; preserves margin for 5 V or 3.3 V logic-level interface ICs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role: Shunt-clamp TVS placed between signal line and chassis ground, triggered within nanoseconds to divert surge energy away from front-end amplifiers and ADCs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump up to 60 V) while preserving <100 ns response and <80 V clamping ceiling for 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field-wiring transients from solenoid de-energization and relay bounce. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, mounted directly at connector entry point to minimize trace inductance. Use Value: Withstands repetitive 600 W surges per IEC 61000-4-5, enabling >100,000 surge cycles without degradation - critical for factory automation uptime. |
| DC Power Rail Protection | Telecom Interface Protection |
Use Scenario: Secondary protection on 48 V intermediate bus in PoE-powered switches and base station power supplies, downstream of primary MOV or fuse. IC Role / Device Role: Fast-response secondary clamp limiting residual transients after bulk suppression, placed adjacent to DC-DC converter inputs. Use Value: Limits clamped voltage to 77.4 V - well below 100 V absolute maximum ratings of common 48 V-input buck controllers, preventing latch-up or gate oxide damage. | Use Scenario: Protecting RS-485 transceiver pins in outdoor telecom cabinets subjected to lightning-induced surges on long cable runs. IC Role / Device Role: Unidirectional TVS on data lines referenced to local ground, coordinated with common-mode chokes to suppress differential-mode transients. Use Value: Achieves <15 pF junction capacitance at zero bias (per typical curve Fig. 4), minimizing signal distortion on 10 Mbps RS-485 links while delivering 600 W surge handling. |
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-E3/5B | Same VWM (48 V), but SMBJ package (DO-214AB); RθJA = 60 °C/W; higher IPPM (13.3 A); same PPPM (600 W). | Lower thermal resistance allows higher sustained surge repetition; preferred where board space permits larger footprint. | Select SMBJ48A-E3/5B when thermal management is critical and PCB real estate allows DO-214AB outline. |
| SMCJ48A-E3/5B | Same VWM, but SMC package (DO-214AB); RθJA = 35 °C/W; IPPM = 27.5 A; PPPM = 1500 W - significantly higher power rating. | Rated for 1500 W surges; suited for primary protection in harsher environments (e.g., railway, heavy industrial). | Choose SMCJ48A-E3/5B only when system-level surge requirements exceed 600 W or when dual-stage protection architecture is used. |
Compared with SMBG48A-E3/5B, SMBJ48A-E3/5B offers superior thermal performance in a slightly larger package, while SMCJ48A-E3/5B provides triple the pulse power capacity - making SMBG48A-E3/5B the optimal balance of compact size, AEC-Q101 compliance, and 600 W capability for space-constrained automotive and industrial edge nodes.
Availability
SMBG48A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and 48 V DC power rail safeguarding requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant manufacturing.
Supply support for SMBG48A-E3/5B 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBG series is engineered specifically for surface-mount transient suppression in space-constrained, high-reliability applications - combining low-profile packaging, AEC-Q101 validation, and consistent 600 W surge performance across the 5.0 V to 188 V VWM range.
FAQ
What is the clamping voltage of SMBG48A-E3/5B at its rated peak pulse current?
The SMBG48A-E3/5B has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 7.8 A, measured under the standardized 10/1000 µs waveform condition. This value is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during a full-rated transient event. The SMBG48A-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG48A-E3/5B qualified for automotive applications?
Yes, SMBG48A-E3/5B is AEC-Q101 qualified, as explicitly stated in the Mechanical Data section and confirmed in the Notes column of the Ordering Information table (page 3). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics. The "HE3" and "HM3" suffix variants are also AEC-Q101 qualified, but SMBG48A-E3/5B carries the industrial-grade "E3" suffix with full AEC-Q101 compliance.
What does the "-E3/5B" suffix indicate in SMBG48A-E3/5B?
The "-E3/5B" suffix denotes two key attributes: "E3" specifies RoHS-compliant, matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, and "5B" indicates packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format is defined in the Ordering Information table (page 3) and distinguishes it from "52"-coded 7-inch reels. The SMBG48A-E3/5B is not halogen-free (that requires "M3" suffix) but is fully RoHS compliant and suitable for industrial and automotive use.
How does SMBG48A-E3/5B differ from bidirectional TVS diodes like SMBG48CA?
SMBG48A-E3/5B is unidirectional and features a cathode band marking; it conducts only during reverse-biased overvoltage events and blocks forward current above ~3.5 V. In contrast, SMBG48CA is bidirectional, symmetrical, and lacks polarity marking - clamping transients of either polarity. The SMBG48A-E3/5B's unidirectional structure yields lower leakage (<1 µA at 48 V) and tighter VBR tolerance versus bidirectional variants, making it preferred for DC-coupled signal and power line protection where polarity is fixed.
What is the thermal resistance of SMBG48A-E3/5B, and how does it affect PCB layout?
The SMBG48A-E3/5B 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, as specified in the Thermal Characteristics table (page 3). This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA. For reliable operation under repeated surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - the SMBG48A-E3/5B's performance is directly tied to this thermal path.
SMBG48A-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBG48A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48A-E3/5B 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-E3/5B reliable?
The price and inventory of SMBG48A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG48A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG48A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48A-E3/5B?
SMBG48A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48A-E3/5B 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-E3/5B?
For technical support, including SMBG48A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48A-E3/5B requirements.
6.How does Aetrix verify that SMBG48A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG48A-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG48A-E3/5B?
All SMBG48A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48A-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBG48A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48A-E3/5B Tags
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