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Vishay General Semiconductor - Diodes Division SMBG12AHE3/52
- Part No.:
- SMBG12AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12AHE3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,679
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Product details
Overview
SMBG12AHE3/52 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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 30.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBG12AHE3/52 datasheet, SMBG12AHE3/52 pinout, SMBG12AHE3/52 application, or SMBG12AHE3/52 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 bidirectional/unidirectional polarity context critical for ESD and load-dump protection design validation.
Technical Context
The SMBG12AHE3/52 operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with peak pulse current derated above 25 °C per Figure 2 and validated under JEDEC J-STD-020 MSL Level 1 reflow conditions (260 °C peak).
It is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports ≤1.0 µA reverse leakage at VWM, and exhibits typical junction capacitance <100 pF at 0 V bias - making it suitable for DC power line and low-speed signal line protection where minimal parasitic loading is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - maximum continuous reverse operating voltage before significant conduction begins; sets protection threshold for 12 V nominal systems |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1 mA - guaranteed avalanche onset range; ensures reliable triggering during transients exceeding system rail |
| VC (Clamping Voltage) | 19.9 V at 30.2 A - peak voltage seen by protected circuit during 600 W surge; defines worst-case stress on downstream ICs |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capability with 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| TJ Range | –55 to +150 °C - extended thermal operating envelope enabling use in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC standard |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on 0.2" × 0.2" copper pads; informs PCB thermal layout requirements |
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 | Current entry terminal during forward conduction | Connected to ground or lower-potential node in unidirectional TVS configuration; enables clamping to GND during positive transients |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 12 V rail); defines directionality - blocks reverse current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 600 W Peak Pulse Power (10/1000 µs) | Enables compliance with automotive load-dump (ISO 7637-2 Pulse 5a) and industrial surge immunity standards without external series impedance |
| AEC-Q101 Qualification | Validates long-term reliability in automotive applications including engine control units, body controllers, and ADAS sensor modules |
| Glass-Passivated Junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) across temperature and lifetime, critical for low-power always-on circuits |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without preconditioning or special handling, reducing manufacturing complexity |
| Low Incremental Surge Resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switching), improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load-dump transients up to 35 V and 100 ms duration. IC Role / Device Role: Unidirectional TVS clamp referenced to chassis ground, placed upstream of DC/DC converters and LDOs. Use Value: Limits voltage to ≤19.9 V during 30.2 A surge, preventing damage to downstream PMICs and microcontrollers while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to cable-induced surges. IC Role / Device Role: Low-capacitance TVS placed between signal and ground, minimizing distortion of milliamp-level signals. Use Value: Clamps transients within nanoseconds while adding <100 pF capacitance, preserving loop accuracy and avoiding false triggers in PLC input stages. |
| Consumer Device USB Port Protection | Telecom Equipment DC Input Stage |
Use Scenario: Secondary overvoltage protection on VBUS line of USB-C ports in portable monitors and docking stations. IC Role / Device Role: Standoff-rated TVS (12 V) coordinated with primary polymer PTC and ESD array to handle both slow surges and fast ESD events. Use Value: Provides 600 W surge headroom beyond IEC 61000-4-5 Level 3, ensuring robustness against accidental AC adapter misconnection or lightning-induced coupling. |
Use Scenario: Front-end protection of –48 V DC power inputs in telecom base station remote radio units (RRUs). IC Role / Device Role: Unidirectional TVS configured with cathode to –48 V rail and anode to ground, clamping negative-going surges. Use Value: Withstands repetitive 10/1000 µs surges up to 600 W at –40 to +85 °C ambient, meeting GR-1089-CORE immunity requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Same VWM/VBR/VC, but SMB (DO-214AA) package; RθJA = 110 °C/W; not AEC-Q101 qualified | Lower power density and no automotive qualification; suited for commercial-grade consumer or computing applications | Select when AEC-Q101 is not required and existing PCB uses SMB footprint |
| SMAJ12AHE3/A | Same AEC-Q101 qualification, but SMA (DO-214AC) package; lower PPPM (400 W); VC = 20.1 V at 22.5 A | Reduced surge handling; better suited for space-constrained designs where 400 W suffices (e.g., low-energy sensor nodes) | Choose for tighter board area budgets where 600 W margin is not mandatory and SMA footprint is standardized |
Compared with SMBG12AHE3/52, SMBJ12A-E3/52 offers identical electrical specs but lacks automotive qualification and has higher thermal resistance, while SMAJ12AHE3/A trades 33 % lower surge power for smaller footprint - making SMBG12AHE3/52 optimal for high-reliability 12 V automotive and industrial power rail protection where thermal performance and qualification are decisive.
Availability
SMBG12AHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 assurance, and 600 W transient immunity.
Supply support for SMBG12AHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was developed to deliver high-power transient suppression in compact, automotive-qualified surface-mount packages - targeting harsh-environment applications where space, thermal performance, and qualification rigor are non-negotiable.
FAQ
What is the clamping voltage of SMBG12AHE3/52 and how is it measured?
The SMBG12AHE3/52 has a maximum clamping voltage (VC) of 19.9 V, measured at a peak pulse current (IPPM) of 30.2 A using a 10/1000 µs waveform per Figure 1 in the Vishay datasheet. This value represents the worst-case voltage imposed on the protected circuit during a standardized surge event and is critical for verifying compatibility with downstream IC absolute maximum ratings. The SMBG12AHE3/52 achieves this clamping performance while maintaining AEC-Q101 qualification and low thermal resistance.
Is SMBG12AHE3/52 suitable for bidirectional transient protection?
No - SMBG12AHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional). Its cathode band marks polarity, and it conducts only during positive transients relative to ground. For bidirectional protection (e.g., AC lines or data buses), a part like SMBG12CAHE3/52 would be required. Using SMBG12AHE3/52 in bidirectional configurations risks failure during negative excursions, as it lacks symmetrical breakdown characteristics.
What does the "HE3/52" suffix mean in SMBG12AHE3/52?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "/52" specifies packaging in 7" diameter plastic tape and reel with 750 units per reel. This distinguishes it from non-automotive variants (e.g., "E3" without "H") and alternate reels ("/5B" = 13", 3200 units). The HE3 grade ensures compliance with automotive reliability standards and material restrictions, making SMBG12AHE3/52 appropriate for safety-critical vehicle subsystems.
How does SMBG12AHE3/52 compare to SMAJ12AHE3/A in thermal performance?
SMBG12AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on 0.2" × 0.2" copper pads, versus 130 °C/W for SMAJ12AHE3/A in the smaller SMA package. This 30 % lower RθJA allows SMBG12AHE3/52 to sustain higher average surge repetition rates and operate reliably at elevated ambient temperatures - a key advantage in under-hood automotive locations or enclosed industrial enclosures where heat dissipation is constrained.
Can SMBG12AHE3/52 be used in place of SMBJ12A-E3/52 without layout changes?
No - although both are unidirectional 12 V TVS diodes, SMBG12AHE3/52 uses the SMBG (DO-215AA) package, while SMBJ12A-E3/52 uses SMB (DO-214AA). Their footprints differ: SMBG has wider lead spacing (0.058" vs. 0.045") and longer body length (0.255" vs. 0.225"), requiring PCB pad revision. Substituting SMBG12AHE3/52 into an SMB layout risks solder joint reliability issues and insufficient creepage. Always verify land pattern compatibility before replacement - SMBG12AHE3/52 is not a drop-in substitute for SMBJ12A-E3/52.
SMBG12AHE3/52 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- 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)
SMBG12AHE3/52 FAQ
1.How can I place an order for SMBG12AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12AHE3/52 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 SMBG12AHE3/52 reliable?
The price and inventory of SMBG12AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12AHE3/52?
SMBG12AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12AHE3/52 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 SMBG12AHE3/52?
For technical support, including SMBG12AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12AHE3/52 requirements.
6.How does Aetrix verify that SMBG12AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12AHE3/52 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 SMBG12AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12AHE3/52?
All SMBG12AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12AHE3/52, 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 SMBG12AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG12AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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