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Vishay General Semiconductor - Diodes Division SMBG120A-E3/52
- Part No.:
- SMBG120A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG120A-E3/52.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,491
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Product details
Overview
SMBG120A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 193 V maximum clamping voltage (VC) at 3.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive power electronics and industrial sensor interfaces.
For engineers reviewing the SMBG120A-E3/52 datasheet, SMBG120A-E3/52 pinout, SMBG120A-E3/52 application, or SMBG120A-E3/52 equivalent, key selection criteria include clamping performance under 3.1 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, and thermal resistance (RθJA = 100 °C/W) on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), critical for protecting MOSFET gates and CAN transceivers against ESD and load-dump events.
The device is rated for repetitive 0.01% duty cycle surges, supports 100 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across –55 °C to +150 °C junction temperature range - validated per JESD22-B102 solderability and J-STD-020 MSL Level 1 (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 133 V / 147 V at 1 mA - guaranteed avalanche onset range defining protection threshold tolerance |
| VC @ IPPM | 193 V at 3.1 A - clamped voltage during full 600 W transient, limiting stress on protected circuitry |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform, enabling robustness against ISO 7637-2 Pulse 5a |
| IFSM | 100 A - single half-sine surge rating (8.3 ms), supporting automotive load-dump immunity |
| Junction Temp | –55 °C to +150 °C - wide operating range suitable for under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing lead frame with matte tin-plated terminals; cathode identified by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to protected line (e.g., 12 V rail or CAN_H) to clamp overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables suppression of high-energy transients like ISO 16750-2 load dump without degradation |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1.0 μA) over temperature and lifetime |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics applications |
| MSL Level 1 (260 °C) | Supports standard SMT reflow without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV contact) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load-dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and chassis ground to clamp surges above 120 V. Use Value: Limits peak voltage to ≤193 V during 3.1 A surge, preventing damage to MCU power supplies and PMICs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional clamping element on 0–10 V or 4–20 mA signal lines exposed to relay switching noise. Use Value: Sub-1 ns response ensures clamping before sensitive ADC inputs saturate or latch up. |
| Automotive CAN Bus Protection | DC Motor Drive Gate Protection |
Use Scenario: Secondary protection on CAN_H/CAN_L lines downstream of primary common-mode choke and ESD diodes. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing differential-mode surges exceeding bus voltage limits. Use Value: 120 V VWM avoids interference with 12 V supply referenced CAN transceivers while clamping to 193 V. | Use Scenario: Gate-source protection of N-channel MOSFETs in H-bridge motor drivers subjected to inductive kickback. IC Role / Device Role / Timing Role: Clamping diode between gate and source to prevent VGS overstress during turn-off. Use Value: Low clamping voltage (193 V) and fast response preserve MOSFET integrity during 100 A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/52 | Same VWM/VBR/VC specs but in SMB (DO-214AA) package; RθJA = 110 °C/W vs. 100 °C/W | Slightly lower power derating margin at elevated ambient; identical electrical performance | Select SMBG120A-E3/52 for tighter thermal management on dense PCBs; SMBJ120A-E3/52 where legacy SMB footprint exists |
| SMCJ120A-E3/52 | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, VC = 193 V at 7.8 A | Used where higher single-pulse energy absorption is required (e.g., alternator load dump) | Choose SMBG120A-E3/52 for space-constrained automotive modules; SMCJ120A-E3/52 for heavy-duty industrial power supplies |
Compared with SMBJ120A-E3/52 and SMCJ120A-E3/52, SMBG120A-E3/52 delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and compact SMBG footprint - making it preferred for modern automotive control units where board area and thermal efficiency are critical.
Availability
SMBG120A-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC motor drive designs requiring stable component supply, RoHS compliance, and AEC-Q101 validation.
Supply support for SMBG120A-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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series was engineered specifically for surface-mount transient suppression in space-constrained, thermally demanding automotive and industrial applications - combining AEC-Q101 compliance with optimized thermal resistance and low-profile packaging.
FAQ
What is the clamping voltage of SMBG120A-E3/52 and how is it measured?
The SMBG120A-E3/52 has a maximum clamping voltage (VC) of 193 V, measured at its peak pulse current (IPPM) of 3.1 A using a 10/1000 μs waveform. This value reflects the actual voltage seen by protected circuitry during a standardized surge event and is specified in the Vishay datasheet Document Number 88456, Table on page 2. The SMBG120A-E3/52 achieves this clamping performance while maintaining low incremental resistance for minimal overshoot.
Is SMBG120A-E3/52 suitable for automotive applications?
Yes, SMBG120A-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and infotainment power rails. Its –55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and validation against ISO 7637-2 load-dump pulses confirm suitability. The SMBG120A-E3/52 meets automotive reliability standards without derating, unlike non-qualified variants.
What does the "E3/52" suffix mean in SMBG120A-E3/52?
The "E3" denotes RoHS-compliant, industrial-grade termination with matte tin plating; "52" specifies the preferred package code for 7″ diameter plastic tape-and-reel delivery with 750 units per reel. This ordering code aligns with Vishay's standard packaging for automated SMT assembly. The SMBG120A-E3/52 uses the same die and characterization as HE3 variants but lacks AEC-Q101 certification - confirming its industrial-grade classification.
How does SMBG120A-E3/52 differ from bidirectional TVS diodes like SMBG120CA?
SMBG120A-E3/52 is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBG120CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMBG120A-E3/52 offers lower leakage (<1.0 μA at 120 V) and is intended for DC rail protection; SMBG120CA suits AC-coupled or differential signal lines like RS-485. Their VBR and VC values differ slightly due to internal structure.
What is the thermal resistance of SMBG120A-E3/52 and why does it matter?
The SMBG120A-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 impacts power derating: at 85 °C ambient, the device can sustain ~360 W of pulse power before exceeding 150 °C junction limit. Proper pad layout is essential - undersized pads raise RθJA, risking thermal runaway during repetitive surges. The SMBG120A-E3/52's low RθJA enables reliable operation in compact automotive modules.
SMBG120A-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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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)
SMBG120A-E3/52 FAQ
1.How can I place an order for SMBG120A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG120A-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 SMBG120A-E3/52 reliable?
The price and inventory of SMBG120A-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 SMBG120A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG120A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG120A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG120A-E3/52?
SMBG120A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG120A-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 SMBG120A-E3/52?
For technical support, including SMBG120A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG120A-E3/52 requirements.
6.How does Aetrix verify that SMBG120A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG120A-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 SMBG120A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG120A-E3/52?
All SMBG120A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG120A-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 SMBG120A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG120A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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