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Vishay General Semiconductor - Diodes Division SMBG12HE3/52
- Part No.:
- SMBG12HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12HE3/52.pdf
- Description:
- TVS DIODE 12VWM 22VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,931
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Product details
Overview
SMBG12HE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 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 in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMBG12HE3/52 datasheet, SMBG12HE3/52 pinout, SMBG12HE3/52 application, or SMBG12HE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant HE3 suffix (JESD 201 Class 2 whisker test), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while low incremental surge resistance enables effective suppression of 8.3 ms half-sine surges up to 100 A (IFSM).
The SMBG12HE3/52 is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, supporting reliable operation in under-hood automotive environments and thermally constrained industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 19.9 V at 30.2 A - clamped voltage during 10/1000 µs transient, limiting downstream stress |
| PPPM | 600 W - peak pulse power handling per single 10/1000 µs event, duty cycle ≤ 0.01 % |
| IFSM | 100 A - non-repetitive forward surge rating for 8.3 ms half-sine wave (unidirectional only) |
| TJ max | +150 °C - maximum junction temperature enabling under-hood automotive deployment |
| Polarity | Unidirectional - cathode marked band; blocks forward current until breakdown, conducts reverse transients |
Pinout & Package
DO-215AA (SMBG) surface-mount package: 2-terminal gull-wing leaded outline, 0.235"–0.255" body length, 0.130"–0.155" body width, 0.075"–0.095" height, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| 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 (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable leakage current (<5 µA at VWM) and long-term parameter stability across life cycle |
| Low profile DO-215AA package | Enables high-density layout and compatibility with standard SMT reflow profiles (peak 260 °C, MSL Level 1) |
| 600 W 10/1000 µs pulse rating | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| HE3 suffix | RoHS-compliant with JESD 201 Class 2 whisker resistance - suitable for high-reliability automotive harnesses |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps 19.9 V at 30.2 A to prevent damage to downstream LDOs and microcontrollers during 100 V/50 ms load dump events. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Parallel-connected TVS on 4–20 mA or 0–10 V output lines exposed to field wiring surges. Use Value: Limits induced transients to <20 V, preserving ADC reference integrity and preventing op-amp saturation or latch-up. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Overvoltage protection on -48 V telecom rectifier outputs feeding base station subsystems. IC Role / Device Role / Timing Role: Reverse-biased TVS (with polarity adapted) on primary DC bus upstream of DC/DC converters. Use Value: Withstands repetitive 600 W pulses without degradation, maintaining system uptime during lightning-induced surges on outdoor cabling. | Use Scenario: Secondary-side protection on USB VBUS lines in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and ground, positioned after USB connector but before power switch. Use Value: Responds in <1 ns to ESD strikes (IEC 61000-4-2 ±15 kV contact), limiting voltage to 19.9 V and preventing USB PHY damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/52 | Same VWM (12 V), identical DO-214AA package (not DO-215AA); 600 W rating, but higher VC = 20.1 V at 29.3 A | DO-214AA has larger pad footprint and slightly higher RθJA; less suitable for ultra-dense automotive modules | Select SMBG12HE3/52 for space-constrained designs requiring DO-215AA's smaller 0.235" length and tighter pitch compatibility |
| 1.5SMC12AH | Same electrical specs (VWM = 12 V, VC = 19.9 V), but DO-214AB (SMC) package - 0.305" length, higher thermal mass | Higher RθJA (~50 °C/W) allows better steady-state power dissipation but requires more board area | Choose 1.5SMC12AH where thermal management dominates over size, e.g., industrial power supplies with forced air cooling |
Compared with SMBJ12AHE3/52 and 1.5SMC12AH, the SMBG12HE3/52 delivers identical clamping performance in the smallest footprint (DO-215AA), optimized for AEC-Q101 automotive modules where board space and MSL-1 reflow compliance are critical constraints.
Availability
SMBG12HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply with full traceability and AEC-Q101 assurance.
Supply support for SMBG12HE3/52 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 and automotive qualification.
The SMBG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting ISO 7637-2 and IEC 61000-4-5 compliance in automotive, industrial, and telecom infrastructure.
FAQ
What is the polarity configuration of SMBG12HE3/52?
The SMBG12HE3/52 is a unidirectional transient voltage suppressor diode. Its cathode is identified by a visible band on the package body, and it conducts only when the cathode is at a higher potential than the anode - making it suitable for DC rail protection where polarity is fixed. This differs from bi-directional variants (e.g., SMBG12CA) that suppress transients in both directions without polarity dependence.
Does SMBG12HE3/52 meet automotive qualification standards?
Yes, SMBG12HE3/52 is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88456, Revision 12-Nov-12). The HE3 suffix explicitly denotes AEC-Q101 compliance, including stress testing for temperature cycling, high-temperature reverse bias, and mechanical shock - validating its use in engine control, body electronics, and ADAS modules.
What is the clamping voltage of SMBG12HE3/52 under standard test conditions?
The SMBG12HE3/52 has a maximum clamping voltage (VC) of 19.9 V at 30.2 A peak pulse current, measured using the standardized 10/1000 µs double-exponential waveform. This value ensures protected circuits remain below critical thresholds during surge events, such as ISO 7637-2 Pulse 1 (inductive load dump) or IEC 61000-4-5 combination wave surges.
How does the HE3 suffix differ from E3 in SMBG12HE3/52?
The HE3 suffix in SMBG12HE3/52 indicates RoHS compliance plus AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas E3 denotes RoHS compliance only (commercial grade, no automotive qualification). Both meet J-STD-002 solderability, but HE3 is mandatory for automotive applications requiring validated long-term reliability under thermal and mechanical stress.
What is the recommended PCB pad layout for SMBG12HE3/52?
Vishay specifies mounting SMBG12HE3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal performance (RθJA = 100 °C/W). Pad dimensions must follow DO-215AA outline: 0.077"–0.083" lead width, 0.038"–0.058" lead length, and 0.130"–0.155" body width - ensuring solder joint reliability and minimizing thermal impedance.
SMBG12HE3/52 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 27.3A
- 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)
SMBG12HE3/52 FAQ
1.How can I place an order for SMBG12HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12HE3/52 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 SMBG12HE3/52 reliable?
The price and inventory of SMBG12HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12HE3/52?
SMBG12HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12HE3/52 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 SMBG12HE3/52?
For technical support, including SMBG12HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12HE3/52 requirements.
6.How does Aetrix verify that SMBG12HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12HE3/52 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 SMBG12HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12HE3/52?
All SMBG12HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12HE3/52, 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 SMBG12HE3/52 part is unused and in its original packaging.
Return procedure for SMBG12HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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