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Vishay General Semiconductor - Diodes Division SMBG120AHE3/5B
- Part No.:
- SMBG120AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG120AHE3/5B.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,899
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Product details
Overview
SMBG120AHE3/5B 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, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the SMBG120AHE3/5B datasheet, SMBG120AHE3/5B pinout, SMBG120AHE3/5B application, or SMBG120AHE3/5B equivalent, key selection criteria include clamping performance under repetitive surge conditions, AEC-Q101 qualification for automotive use, thermal resistance (RθJA = 100 °C/W), 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 above VBR = 133–147 V to divert transient energy. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), critical for protecting MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
The SMBG120AHE3/5B is rated for TJ = –55 °C to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is AEC-Q101 qualified - confirming suitability for under-hood automotive modules where thermal cycling and long-term reliability are mandatory.
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 IT = 1 mA - defines reliable turn-on threshold across production lot |
| VC @ IPPM | 193 V at 3.1 A - clamping voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability under standardized surge waveform |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine), supports load-dump immunity |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on recommended 5.0 mm × 5.0 mm pad layout |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (unidirectional mode) | Connected to protected line or ground return path depending on circuit topology |
| Cathode | Current exit terminal (unidirectional mode) | Marked with band; ties to higher-potential rail (e.g., VCC) for clamping to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable leakage current (<1.0 μA) and long-term parameter stability under humidity and bias stress |
| 600 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units and ADAS sensor modules |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without moisture-related popcorn failure |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between VBAT and chassis ground to clamp surges up to 120 V. Use Value: Limits transient voltage to ≤193 V, preventing damage to MCU power regulators and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS connected from sensor output line to ground to suppress ESD and inductive kickback. Use Value: Clamps 8 kV contact ESD events within <1 ns, preserving ADC input integrity and measurement accuracy. |
| Telecom Line Surge Protection | DC Motor Drive Control Protection |
Use Scenario: Shielding RS-485 transceiver I/O pins in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: TVS array component used per-line (A/B) with series impedance to limit current into transceiver ESD structures. Use Value: Withstands 600 W 10/1000 μs surges while maintaining <1.0 μA leakage at 120 V, ensuring signal integrity during normal operation. | Use Scenario: Suppressing flyback voltage spikes generated by brushed DC motor commutation in robotic actuators. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge high-side switch to clamp inductive energy. Use Value: Absorbs 100 A single-half-sine surge (8.3 ms), preventing gate oxide rupture in MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/5B | Same VWM (120 V), lower PPPM (600 W same), but VC = 193 V identical; SMBJ has slightly larger footprint (DO-214AB vs DO-215AA) | SMBJ120A-E3/5B uses larger pad layout; less suitable for ultra-dense automotive PCBs | Select SMBG120AHE3/5B when board space is constrained and AEC-Q101 compliance is mandatory |
| 1.5SMC120A | Same VWM/VC, but in larger SMC (DO-214AB) package; RθJA = 40 °C/W (better thermal performance), not AEC-Q101 qualified | 1.5SMC120A supports higher average power dissipation but lacks automotive qualification | Choose 1.5SMC120A only for non-automotive industrial applications requiring enhanced thermal margin |
Compared with SMBJ120A-E3/5B and 1.5SMC120A, the SMBG120AHE3/5B uniquely combines AEC-Q101 qualification, compact SMBG footprint, and verified 193 V clamping at 3.1 A - making it the preferred choice for space-constrained automotive ECUs where qualification and reliability are non-negotiable.
Availability
SMBG120AHE3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBG120AHE3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG-series TRANSZORB® TVS line targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for fast response, stable clamping, and qualification to AEC-Q101 and UL 497B standards.
FAQ
What is the clamping voltage of SMBG120AHE3/5B at its rated peak pulse current?
The SMBG120AHE3/5B has a maximum clamping voltage (VC) of 193 V at 3.1 A peak pulse current (IPPM) under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and guarantees consistent overvoltage limiting behavior across production lots - critical for validating protection margins in safety-critical automotive designs using the SMBG120AHE3/5B.
Is SMBG120AHE3/5B qualified for automotive applications?
Yes, SMBG120AHE3/5B is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 09-Jan-2024 (Document Number: 88456). This qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing - validating its use in engine control units, body electronics, and ADAS modules where long-term reliability under thermal and electrical stress is required. The HE3 suffix denotes AEC-Q101 compliance.
What does the "5B" suffix indicate in SMBG120AHE3/5B?
The "5B" suffix in SMBG120AHE3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume automated SMT assembly and is distinct from the "52" suffix (7-inch reel, 750 units). The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification - both essential for automotive procurement traceability of the SMBG120AHE3/5B.
How does SMBG120AHE3/5B differ from bidirectional variants like SMBG120CA?
The SMBG120AHE3/5B is unidirectional, with cathode marked by a band and intended for DC rail protection where polarity is fixed. In contrast, SMBG120CA is bidirectional, has no polarity marking, and clamps symmetrically in both directions - suited for AC lines or differential data buses. Their VBR and VC values differ: SMBG120CA has VBR = 133–147 V (same range) but VC = 209 V at 2.9 A, reflecting different test conditions. Designers must select based on circuit polarity requirements, not interchangeably.
What is the thermal resistance of SMBG120AHE3/5B, and how does it affect layout design?
The SMBG120AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no internal layer copper pours or thermal vias. To maintain safe junction temperatures during repetitive surges, PCB layout must adhere strictly to this pad size - undersized pads increase RθJA, risking thermal runaway. The SMBG120AHE3/5B's thermal performance is thus layout-dependent and must be validated in system-level thermal simulation.
SMBG120AHE3/5B 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):
- 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)
SMBG120AHE3/5B FAQ
1.How can I place an order for SMBG120AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG120AHE3/5B 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 SMBG120AHE3/5B reliable?
The price and inventory of SMBG120AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG120AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG120AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG120AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG120AHE3/5B?
SMBG120AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG120AHE3/5B 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 SMBG120AHE3/5B?
For technical support, including SMBG120AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG120AHE3/5B requirements.
6.How does Aetrix verify that SMBG120AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG120AHE3/5B 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 SMBG120AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG120AHE3/5B?
All SMBG120AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG120AHE3/5B, 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 SMBG120AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG120AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG120AHE3/5B Tags
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