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Vishay General Semiconductor - Diodes Division SMBG120AHE3/52
- Part No.:
- SMBG120AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG120AHE3/52.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,319
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Product details
Overview
SMBG120AHE3/52 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 a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), <193 V clamping voltage (VC) at 3.1 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG120AHE3/52 datasheet, SMBG120AHE3/52 pinout, SMBG120AHE3/52 application, or SMBG120AHE3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, junction temperature derating above 25 °C, unidirectional polarity marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM = 120 V and rapidly transitions to low-impedance conduction once VBR (133–147 V) is exceeded. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive transients.
It delivers 600 W peak pulse power per 10/1000 µs waveform with 0.01 % duty cycle, supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across –55 °C to +150 °C junction temperature range - critical for under-hood automotive and industrial power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for protected circuit. |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during fast transients. |
| VC @ IPPM | 193 V at 3.1 A - Clamped voltage during full 600 W surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 µs waveform; validates compliance with IEC 61000-4-5 Level 4. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports protection against load dump events in 12 V automotive systems. |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient environments without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during overvoltage event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., power rail or signal trace); marked with band for orientation verification. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust suppression of lightning-induced surges and inductive switching spikes in automotive and industrial power rails. |
| AEC-Q101 qualified | Validates reliability for automotive applications including engine control modules, infotainment power supplies, and CAN bus protection circuits. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without moisture-related delamination or popcorn failure. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to ±100 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between power rail and chassis ground to divert surge energy away from DC/DC converters and microcontrollers. Use Value: Limits peak clamped voltage to ≤193 V, preserving integrity of 24 V-rated input stages and meeting OEM immunity requirements. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at connector entry point to clamp ESD and inductive kickback on signal lines. Use Value: Sub-200 V clamping prevents latch-up in op-amps and ADC front-ends while maintaining signal fidelity below 120 V operating range. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary-side protection on telecom DC distribution boards subjected to induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS on +48 V backplane rails to absorb repetitive 600 W transients without degradation. Use Value: AEC-Q101 qualification ensures long-term parametric stability across 15+ year deployments in central office equipment. | Use Scenario: Input-stage overvoltage clamp in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor to suppress differential-mode surges from AC line switching or poor-quality mains. Use Value: 120 V VWM provides sufficient margin above 100–240 VAC rectified peaks while enabling compact SMBG footprint. |
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 (120 V), lower PPPM = 600 W but higher VC = 199 V at same IPPM; SMBJ package has larger thermal mass but identical pinout. | Less stringent clamping requirement acceptable; preferred where board space allows larger SMB package. | Select when higher thermal inertia is needed for sustained surge duty cycles. |
| SMCJ120AHE3/52 | Same VWM/VBR, higher PPPM = 1500 W, VC = 193 V at 7.8 A; SMC package offers superior power handling but requires larger PCB area. | Required for systems facing repeated high-energy surges (e.g., industrial motor drives). | Choose when 600 W is insufficient and layout permits SMC (DO-214AB) footprint. |
Compared with SMBJ120A-E3/52 and SMCJ120AHE3/52, SMBG120AHE3/52 delivers identical clamping performance in a smaller SMBG footprint with AEC-Q101 validation - making it optimal for space-constrained automotive modules where 600 W surge capacity suffices.
Availability
SMBG120AHE3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant packaging.
Supply support for SMBG120AHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG TRANSZORB® series is engineered for high-speed transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification, low clamping voltage, and consistent surge endurance.
FAQ
What is the clamping voltage of SMBG120AHE3/52 at its rated peak pulse current?
The SMBG120AHE3/52 has a maximum clamping voltage (VC) of 193 V at its rated peak pulse current of 3.1 A (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBG120AHE3/52 suitable for automotive applications?
Yes, SMBG120AHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C - making it appropriate for engine control units, body control modules, and ADAS sensor power rails where reliability under thermal and electrical stress is mandatory.
How does the SMBG120AHE3/52 differ from bidirectional TVS diodes like SMBG120CA?
The SMBG120AHE3/52 is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBG120CA is bidirectional with no polarity marking. Unidirectional variants offer lower leakage current and tighter VBR tolerance, making SMBG120AHE3/52 preferable for DC power rail protection where reverse conduction must be blocked.
What is the thermal resistance of SMBG120AHE3/52, and how does it affect power derating?
SMBG120AHE3/52 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. This value directly governs power derating above 25 °C ambient: for example, at 85 °C ambient, usable peak pulse power drops to ~420 W per Vishay's derating curve (Fig. 2), requiring system-level thermal validation.
Does SMBG120AHE3/52 require special PCB layout considerations?
Yes - optimal performance requires mounting SMBG120AHE3/52 on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve rated 600 W pulse power. Short, low-inductance traces to ground and minimized loop area are essential to preserve sub-ns response time; the cathode band must align with schematic polarity to prevent reverse-bias failure during surge events.
SMBG120AHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG120AHE3/52 FAQ
1.How can I place an order for SMBG120AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG120AHE3/52 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 SMBG120AHE3/52 reliable?
The price and inventory of SMBG120AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG120AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG120AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG120AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG120AHE3/52?
SMBG120AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG120AHE3/52 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 SMBG120AHE3/52?
For technical support, including SMBG120AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG120AHE3/52 requirements.
6.How does Aetrix verify that SMBG120AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG120AHE3/52 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 SMBG120AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG120AHE3/52?
All SMBG120AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG120AHE3/52, 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 SMBG120AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG120AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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