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Vishay General Semiconductor - Diodes Division SMBG12CAHE3/52
- Part No.:
- SMBG12CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12CAHE3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,698
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Product details
Overview
SMBG12CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), <1 µA reverse leakage at VWM, and clamps to ≤19.9 V at 30.2 A peak current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG12CAHE3/52 datasheet, SMBG12CAHE3/52 pinout, SMBG12CAHE3/52 application, or SMBG12CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low clamping ratio (VC/VBR ≈ 1.43), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 µA leakage at 12 V), but triggers into low-impedance conduction when transient voltage exceeds VBR (13.3–14.7 V). Its bidirectional symmetry enables protection of AC-coupled or floating lines without polarity constraints.
Thermal design relies on RθJA = 100 °C/W (on 5.0 mm × 5.0 mm pads) and RθJL = 20 °C/W, supporting repetitive surge handling up to 0.01% duty cycle. The glass-passivated junction ensures stable VBR tolerance and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - precise breakdown threshold defining turn-on sensitivity |
| VC @ IPPM | ≤19.9 V at 30.2 A - clamping voltage limiting downstream IC stress during 600 W surge |
| PPPM | 600 W - peak pulse power handling per 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| IFSM | Not applicable - bidirectional device has no forward surge rating (unidirectional only) |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial control cabinets |
| Qualification | AEC-Q101 qualified - validated for automotive electronics reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing leadframe with matte tin-plated terminals; meets UL 94 V-0, MSL Level 1 (260 °C reflow peak), JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Common terminal for symmetrical clamping; no polarity marking on device body |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode; bidirectional operation requires no orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports Level 4 IEC 61000-4-5 surge immunity (4 kV line-to-earth) in compact SMBG footprint |
| AEC-Q101 qualification | Validated for automotive-grade deployment including temperature cycling, HTRB, and mechanical shock |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage exposure to protected ICs while maintaining robust surge margin |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal/humidity stress |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp absorbing transients before they reach sensitive analog front-ends or communication PHYs. Use Value: Maintains signal integrity during 12 V battery system surges up to 600 W while meeting AEC-Q101 requirements for automotive longevity. | Use Scenario: Safeguarding digital input/output channels on programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Fast-response voltage limiter diverting surge energy away from microcontroller GPIOs and level-shifters. Use Value: Clamps 30.2 A transients to ≤19.9 V within nanoseconds, preventing latch-up or gate oxide damage in 3.3 V/5 V logic circuits. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Shielding RS-485/RS-422 differential data lines in base station equipment from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Symmetrical bidirectional clamp ensuring equal protection on both A and B lines without polarity concerns. Use Value: Enables robust 12 V common-mode standoff with sub-20 V clamping, preserving signal eye diagram integrity during 10/1000 µs surges. | Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− or DisplayPort AUX CH lines behind primary TVS arrays. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) shunt device minimizing signal distortion on high-speed serial links. Use Value: Provides <1 µA leakage at 12 V and fast response to ±8 kV contact ESD (IEC 61000-4-2), extending system-level ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-E3/52 | Same VWM/VBR/VC, but SMB (DO-214AA) package - 1.58 mm height vs. SMBG's 1.14 mm; RθJA = 110 °C/W | Less suitable for ultra-low-profile designs; slightly lower power derating above 25 °C | Select SMBG12CAHE3/52 when board height <1.2 mm or AEC-Q101 qualification is mandatory |
| 1.5KE12CA | Through-hole DO-201 package; same electrical specs but higher RθJA (50 °C/W on large pads), no AEC-Q101 rating | Not suitable for automotive or high-density SMT layouts; limited to prototyping or legacy through-hole systems | Choose SMBG12CAHE3/52 for production SMT, automotive, or space-constrained industrial designs |
Compared with SMBJ12CA-E3/52 and 1.5KE12CA, SMBG12CAHE3/52 delivers identical clamping performance in a lower-profile, AEC-Q101-qualified SMBG package optimized for automated SMT and thermally constrained automotive modules.
Availability
SMBG12CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer USB/DisplayPort ESD protection requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMBG12CAHE3/52 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 is engineered for high-power transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems demanding AEC-Q101 qualification and consistent clamping performance.
FAQ
What is the clamping voltage of SMBG12CAHE3/52 at its rated peak pulse current?
The SMBG12CAHE3/52 clamps to a maximum of 19.9 V at its peak pulse current of 30.2 A (10/1000 µs waveform). This value is specified in the Vishay datasheet Document Number 88456 and reflects worst-case VC under standardized surge conditions - critical for verifying safe overvoltage margins for downstream ICs in the SMBG12CAHE3/52-protected circuit.
Is SMBG12CAHE3/52 suitable for automotive applications?
Yes, SMBG12CAHE3/52 is AEC-Q101 qualified per Vishay documentation, confirming validation for automotive-grade reliability including temperature cycling, high-temperature reverse bias, and mechanical shock testing. Its 150 °C maximum junction temperature and bidirectional clamping make it appropriate for engine control units, ADAS sensor interfaces, and infotainment system I/O protection where SMBG12CAHE3/52 is deployed.
How does the SMBG12CAHE3/52 differ from unidirectional variants like SMBG12AHE3/52?
SMBG12CAHE3/52 is bidirectional with symmetrical VBR (13.3–14.7 V) and no polarity marking, enabling AC or floating-line protection; SMBG12AHE3/52 is unidirectional with cathode band marking and includes IFSM = 100 A rating. The "CA" suffix explicitly denotes bidirectional functionality, and SMBG12CAHE3/52 cannot substitute for unidirectional use cases requiring forward surge capability.
What is the thermal resistance of SMBG12CAHE3/52, and how does it affect layout?
SMBG12CAHE3/52 has RθJA = 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and RθJL = 20 °C/W. This requires adherence to Vishay's recommended pad layout to ensure proper heat dissipation during repetitive surges; undersized pads increase junction temperature and reduce surge endurance - a key constraint in SMBG12CAHE3/52 thermal design.
Does SMBG12CAHE3/52 have a specified junction capacitance, and why does it matter?
Vishay specifies typical junction capacitance for SMBG12CAHE3/52 as <50 pF at 0 V (Fig. 4, Document 88456), though exact value depends on bias. This low capacitance minimizes signal distortion on high-speed lines (e.g., USB, RS-485), making SMBG12CAHE3/52 suitable for data-line protection where excessive CJ would degrade rise/fall times or cause reflections.
SMBG12CAHE3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG12CAHE3/52 FAQ
1.How can I place an order for SMBG12CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12CAHE3/52 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 SMBG12CAHE3/52 reliable?
The price and inventory of SMBG12CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12CAHE3/52?
SMBG12CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12CAHE3/52 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 SMBG12CAHE3/52?
For technical support, including SMBG12CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12CAHE3/52 requirements.
6.How does Aetrix verify that SMBG12CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12CAHE3/52 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 SMBG12CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12CAHE3/52?
All SMBG12CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12CAHE3/52, 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 SMBG12CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG12CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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