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Vishay General Semiconductor - Diodes Division SMBG12AHE3/5B
- Part No.:
- SMBG12AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12AHE3/5B.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,655
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Product details
Overview
SMBG12AHE3/5B 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 maximum 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 sensor signal lines, industrial I/O interfaces, and DC power rail protection.
For engineers reviewing the SMBG12AHE3/5B datasheet, SMBG12AHE3/5B pinout, SMBG12AHE3/5B application, or SMBG12AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during transient events, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time. Its unidirectional configuration provides forward conduction capability (100 A IFSM, 8.3 ms half-sine) while blocking reverse leakage ≤5.0 µA at 12 V.
The device is rated for 600 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W - enabling reliable operation in high-reliability automotive and industrial environments where junction temperature must remain ≤150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuit. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamping voltage limits stress on downstream ICs during 600 W surge events. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform supports IEC 61000-4-5 Level 4 compliance. |
| IFSM | 100 A - Surge current rating for 8.3 ms half-sine wave enables protection against inductive switch-off spikes. |
| TJ max | +150 °C - Maximum junction temperature allows use in under-hood automotive and high-ambient industrial settings. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including temperature cycling and HTRB. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing lead frame with matte tin-plated terminals 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 point in forward bias; connected to protected line ground or low-side reference. | Enables forward conduction path during positive transients or fault conditions; must be routed to lowest impedance return path. |
| Cathode | Current exit point in forward bias; marked with band; connected to protected signal/power line. | Defines clamping direction: reverse-biased during normal operation, avalanches into conduction when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock testing. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives. |
| 600 W peak pulse power | Supports protection against severe transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to downstream MOSFETs or MCUs. |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without preconditioning or baking. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump-induced transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between signal line and ground, responding within <1 ns to limit voltage excursion below IC absolute maximum ratings. Use Value: Prevents permanent damage to 3.3 V/5 V sensor interface ICs during ISO 10605 ESD events (±25 kV air, ±20 kV contact) and ISO 7637-2 Pulse 1/2/5a. | Use Scenario: Safeguarding PLC digital input modules and fieldbus terminations (RS-485, Profibus) against induced surges from nearby motor switching or lightning coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal lines entering isolated barrier circuits, absorbing energy before it reaches optocouplers or level shifters. Use Value: Maintains functional safety integrity by limiting transient voltage to <20 V, ensuring continued operation of 24 V logic-level receivers during 1 kV/µs common-mode surges. |
| DC Power Rail Protection | Consumer Device USB Port |
Use Scenario: Secondary protection on 12 V or 24 V DC input rails of embedded controllers, guarding against reverse-polarity connection and inductive kickback from solenoids or relays. IC Role / Device Role / Timing Role: Fast-acting crowbar element that conducts heavily during overvoltage, diverting surge current away from upstream regulators and downstream loads. Use Value: Enables single-stage protection design with no series impedance required; handles 100 A surge (8.3 ms) without degradation, supporting UL 497B recognition. | Use Scenario: ESD suppression on USB 2.0 data lines (D+/D−) and VBUS in portable medical monitors and smart home hubs exposed to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) unidirectional clamp referenced to system ground, placed adjacent to connector. Use Value: Preserves signal integrity up to 480 Mbps while meeting IEC 61000-4-2 Level 4 (±15 kV air) without adding jitter or insertion loss. |
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 (12 V), slightly higher VC (23.2 V @ 26.7 A), lower PPPM (600 W same but derated faster above 25 °C). | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select when automotive qualification is not required and cost optimization is prioritized. |
| SMCJ12AHE3/5B | Same VWM/VBR/VC specs, but larger SMC (DO-214AB) package with higher thermal mass and RθJA = 35 °C/W. | Better sustained surge handling due to higher IFSM (200 A), but requires more PCB area and incompatible footprint. | Select when board space permits and higher single-pulse energy absorption (>10 J) is needed. |
Compared with SMBJ12A-E3/52 and SMCJ12AHE3/5B, SMBG12AHE3/5B uniquely combines AEC-Q101 qualification, SMBG footprint efficiency, and validated 600 W clamping performance - making it optimal for space-constrained automotive modules requiring zero-layout change from legacy SMB designs.
Availability
SMBG12AHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer USB interface hardening requiring stable component supply across multi-year production cycles.
Supply support for SMBG12AHE3/5B 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 MOSFETs with emphasis on reliability, ruggedness, and automotive-grade qualification.
The SMBG series was engineered specifically for high-volume, high-reliability surface-mount transient suppression in automotive and industrial control systems - balancing low profile, AEC-Q101 compliance, and repeatable clamping performance across temperature and lifetime.
FAQ
What is the maximum clamping voltage of SMBG12AHE3/5B at its rated peak pulse current?
The SMBG12AHE3/5B has a maximum clamping voltage (VC) of 19.9 V at its specified peak pulse current (IPPM) of 30.2 A, measured using a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBG12AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG12AHE3/5B suitable for bidirectional transient protection?
No, SMBG12AHE3/5B is a unidirectional TVS diode - its cathode band marking indicates polarity-sensitive installation, and it conducts only in reverse breakdown and forward conduction modes. For bidirectional protection, Vishay offers the SMBG12CA variant. Using SMBG12AHE3/5B in a bidirectional configuration would result in unintended forward conduction during negative transients, potentially damaging the device or circuit. Always verify polarity during layout of SMBG12AHE3/5B.
Does SMBG12AHE3/5B meet automotive qualification standards?
Yes, SMBG12AHE3/5B is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number: 88456, Revision: 09-Jan-2024) and indicated by the "HE3" suffix. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive applications. The SMBG12AHE3/5B also meets UL 497B for protector classification.
What is the thermal resistance from junction to ambient for SMBG12AHE3/5B?
The typical thermal resistance from junction to ambient (RθJA) for SMBG12AHE3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value assumes standard JEDEC test conditions and directly impacts maximum allowable power dissipation at elevated ambient temperatures. Designers must apply derating curves (Fig. 2) to ensure SMBG12AHE3/5B junction temperature remains ≤150 °C in actual PCB layouts.
Can SMBG12AHE3/5B be used in place of SMBJ12A in an existing design?
SMBG12AHE3/5B shares identical electrical specifications (VWM, VBR, VC, PPPM) with SMBJ12A but uses the smaller SMBG (DO-215AA) package versus SMBJ's DO-214AA outline. Pin-compatible mounting is possible only if the PCB pad layout matches the SMBG footprint - which is 0.235" × 0.130" (5.97 mm × 3.30 mm) versus SMBJ's 0.265" × 0.150". Therefore, SMBG12AHE3/5B is not a drop-in replacement unless the board is re-designed for the smaller body and gull-wing leads.
SMBG12AHE3/5B 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):
- 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)
SMBG12AHE3/5B FAQ
1.How can I place an order for SMBG12AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12AHE3/5B 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 SMBG12AHE3/5B reliable?
The price and inventory of SMBG12AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12AHE3/5B?
SMBG12AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12AHE3/5B 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 SMBG12AHE3/5B?
For technical support, including SMBG12AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12AHE3/5B requirements.
6.How does Aetrix verify that SMBG12AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12AHE3/5B 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 SMBG12AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12AHE3/5B?
All SMBG12AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12AHE3/5B, 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 SMBG12AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG12AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12AHE3/5B Tags
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