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Vishay General Semiconductor - Diodes Division SMBG12HE3/5B
- Part No.:
- SMBG12HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12HE3/5B.pdf
- Description:
- TVS DIODE 12VWM 22VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,537
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Product details
Overview
SMBG12HE3/5B from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) 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 (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power line and sensor interface protection.
For engineers reviewing the SMBG12HE3/5B datasheet, SMBG12HE3/5B pinout, SMBG12HE3/5B application, or SMBG12HE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, bi-directional-capable variant family compatibility, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, responding to transients within picoseconds via avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress, while the DO-215AA package supports automated placement and meets UL 94 V-0 flammability.
The SMBG12HE3/5B is rated for 100 A non-repetitive forward surge current (IFSM) and exhibits 100 °C/W typical junction-to-ambient thermal resistance. Its unidirectional polarity (cathode marked) enables DC-biased line protection, and it complies with ANSI/IEEE C62.35 surge standards for industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1 mA - precise avalanche initiation threshold ensuring predictable turn-on |
| VC (Clamping Voltage) | 19.9 V at 30.2 A IPPM - limits downstream voltage during 600 W transient events |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - sustains high-energy surges without failure |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - withstands inrush and load-dump events in automotive systems |
| TJ max | 150 °C - supports operation in under-hood and industrial ambient conditions |
| Package | DO-215AA (SMBG) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
DO-215AA (SMBG) package: low-profile, gull-wing surface-mount outline with cathode band marking on one end; terminals are matte tin-plated for reliable solder joint formation per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side (e.g., ground or return path) in uni-directional protection |
| Cathode (banded end) | Current exit point in forward bias; clamping node in reverse bias | Connected to protected line (e.g., 12 V supply rail); avalanche conduction occurs here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Glass passivated junction | Eliminates moisture sensitivity and improves long-term VBR stability under humidity stress |
| 600 W peak pulse power (10/1000 µs) | Protects against ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 3 surges |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning |
| RoHS-compliant, HE3 suffix | Meets JESD201 Class 2 whisker resistance and EU Directive 2011/65/EU requirements |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Uni-directional shunt clamp placed between power rail and ground. Use Value: Limits voltage to ≤19.9 V during 30.2 A surge, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance parallel clamp on signal lines referenced to system ground. Use Value: Responds in <1 ps to ESD and switching noise, preserving signal integrity without loading the 0–5 V output range. |
| Telecom DC Power Input | Consumer Device USB Port Protection |
|
Use Scenario: Securing 12–48 V DC input stages of base station power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS in series with fuse and common-mode choke. Use Value: Absorbs up to 600 W transient energy while maintaining <20 V clamping, enabling compact front-end design. |
Use Scenario: Adding secondary overvoltage defense on VBUS line of USB-C ports in portable monitors. IC Role / Device Role / Timing Role: Standby-mode clamp activated only during fault conditions. Use Value: Withstands 100 A surge (8.3 ms) and maintains 12 V stand-off to avoid false triggering during hot-plug 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 |
|---|---|---|---|
| SMBJ12AHE3/5B | Same VWM (12 V), but higher PPPM (600 W vs. SMBJ's 600 W), identical DO-214AA package - differs in thermal resistance (RθJA = 85 °C/W vs. SMBG's 100 °C/W) | Preferred where board space allows larger pad area for improved heat dissipation | Select SMBJ12AHE3/5B if PCB copper area exceeds 0.2" × 0.2" per terminal and lower thermal impedance is required |
| 1.5SMC12AH | Same electrical specs (VWM = 12 V, VC = 19.9 V), but DO-214AB (SMC) package - 2.5× larger footprint and 1.5× higher weight | Suitable for high-volume industrial power supplies where manual handling or legacy layout constraints apply | Choose 1.5SMC12AH only when existing SMC footprint is fixed and DO-215AA re-layout is not feasible |
Compared with SMBG12HE3/5B, SMBJ12AHE3/5B offers better thermal performance in thermally constrained layouts, while 1.5SMC12AH trades miniaturization for mechanical robustness and higher surge margin in non-space-sensitive designs.
Availability
SMBG12HE3/5B is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, telecom power inputs, and consumer USB power protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMBG12HE3/5B 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMBG series was engineered specifically for AEC-Q101-compliant surface-mount transient suppression in space-constrained automotive modules and harsh-environment industrial controls.
FAQ
What is the clamping voltage of SMBG12HE3/5B at its rated peak pulse current?
The SMBG12HE3/5B has a maximum clamping voltage (VC) of 19.9 V at 30.2 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value ensures protected circuits remain below critical voltage thresholds during standardized surge events. The SMBG12HE3/5B achieves this clamping performance while maintaining low incremental surge resistance, which directly contributes to consistent voltage limiting across multiple transient occurrences.
Is SMBG12HE3/5B qualified for automotive use?
Yes, SMBG12HE3/5B carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay's documentation. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance - making it suitable for engine control units, body electronics, and ADAS sensor modules. The SMBG12HE3/5B also meets JESD201 Class 2 whisker resistance and UL 497B recognition for protector classification.
What does the "5B" in SMBG12HE3/5B indicate?
The "5B" denotes the packaging configuration: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This format supports high-speed automated pick-and-place assembly and is optimized for SMT production lines. The SMBG12HE3/5B shares the same electrical and thermal specifications as SMBG12HE3/52 (7-inch reel, 750 units), differing only in reel size and quantity - both use identical DO-215AA (SMBG) devices.
How does SMBG12HE3/5B differ from bi-directional variants like SMBG12CA?
SMBG12HE3/5B is uni-directional, with a cathode band marking and forward voltage drop (~3.5 V at 50 A), intended for DC-biased lines. In contrast, SMBG12CA is bi-directional, unmarked, and symmetrical - used in AC-coupled or floating signal paths. The SMBG12HE3/5B cannot substitute for SMBG12CA in AC applications due to polarity dependence, and vice versa, because clamping behavior differs fundamentally across voltage quadrants.
What is the maximum operating junction temperature for SMBG12HE3/5B?
The SMBG12HE3/5B has a maximum junction temperature (TJ max) of +150 °C, verified per Vishay's thermal characterization data. This rating enables reliable operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating curves in the datasheet show that at 100 °C ambient, the SMBG12HE3/5B retains >60% of its 600 W peak pulse power capability - a key design margin confirmed for the SMBG12HE3/5B.
SMBG12HE3/5B 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:
- 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)
SMBG12HE3/5B FAQ
1.How can I place an order for SMBG12HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12HE3/5B 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 SMBG12HE3/5B reliable?
The price and inventory of SMBG12HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12HE3/5B?
SMBG12HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12HE3/5B 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 SMBG12HE3/5B?
For technical support, including SMBG12HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12HE3/5B requirements.
6.How does Aetrix verify that SMBG12HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12HE3/5B 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 SMBG12HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12HE3/5B?
All SMBG12HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12HE3/5B, 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 SMBG12HE3/5B part is unused and in its original packaging.
Return procedure for SMBG12HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12HE3/5B Tags
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