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Vishay General Semiconductor - Diodes Division SMCG12AHE3/57T
- Part No.:
- SMCG12AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12AHE3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,921
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Product details
Overview
SMCG12AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) 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, 1500 W peak pulse power (10/1000 µs), clamping voltage of 19.9 V at 75.4 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG12AHE3/57T datasheet, SMCG12AHE3/57T pinout, SMCG12AHE3/57T application, or SMCG12AHE3/57T equivalent, this device is selected for high-surge-capability, low-clamping, surface-mount transient suppression in automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where fast response (<1 ns), low incremental surge resistance, and MSL Level 1 reflow compatibility are critical.
Technical Context
This TVS operates as a clamping-type protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but avalanches rapidly when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMCG12AHE3/57T is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and achieves thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads - enabling effective power dissipation without heatsinking in most board-level deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on with <1.4 V tolerance. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamped voltage during full 1500 W transient; determines maximum stress on downstream ICs. |
| PPPM | 1500 W (10/1000 µs) - Peak surge handling capacity; validates suitability for ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Level 4 events. |
| ID @ VWM | 5.0 µA max - Ultra-low leakage at rated stand-off; prevents signal distortion or battery drain in always-on circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing leaded package with 7.87 mm × 10.16 mm footprint; compatible with automated SMT assembly and J-STD-020 reflow (260 °C peak). |
Pinout & Package
SMCG12AHE3/57T uses the SMCG (DO-215AB) package: a gull-wing surface-mount outline with two terminals, cathode marked by a band. The case conforms to JEDEC DO-215AB mechanical dimensions and is rated UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line's lower-potential side (e.g., GND or return path) | Enables unidirectional clamping from line-to-ground; must be tied to system reference plane for proper transient shunting. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line's higher-potential side (e.g., VBUS, signal rail) | Defines polarity-sensitive placement; reversal causes catastrophic failure under normal operation due to forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensors per stress test requirements. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during transients - critical for protecting 12 V-rated logic ICs and MOSFET gate drivers. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture sensitivity concerns; eliminates bake-out requirement pre-assembly. |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime; reduces parameter drift under thermal cycling and humidity exposure. |
| 1500 W peak pulse power | Handles severe load-dump surges (e.g., ISO 16750-2) and inductive switching spikes without degradation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in vehicle ECUs against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC input stage. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to downstream regulators and microcontrollers rated for 20 V absolute max. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Line-to-ground TVS on signal traces exposed to ESD and cable discharge events. Use Value: Sub-20 ns response time suppresses fast transients before they couple into precision ADC front-ends or op-amp buffers. |
| DC-DC Converter Input Stage | Telecom Equipment Surge Protection |
Use Scenario: Input protection for buck converters powering FPGA or DSP cores in telecom base stations. IC Role / Device Role / Timing Role: Primary transient suppressor upstream of input filter capacitors and controller ICs. Use Value: 1500 W rating absorbs repeated 10/1000 µs surges from shared power distribution buses without derating. |
Use Scenario: Secondary protection on Ethernet PHY power rails (e.g., PoE injectors) subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS bridging VDD and GND to clamp common-mode transients. Use Value: AEC-Q101 qualification ensures long-term stability in outdoor cabinets with wide ambient temperature swings (–40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/52T | Same VWM (12 V), lower PPPM (400 W), SMA (DO-214AC) package, smaller footprint (4.5 mm × 2.7 mm) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump. | Select when space-constrained PCBs require minimal area and surge threat level is moderate (e.g., consumer USB ports). |
| SMCJ12AHE3/57T | Identical VWM (12 V), same SMCG package, but rated for 1500 W with tighter VBR tolerance (13.3–14.7 V vs. 13.3–15.3 V) and same AEC-Q101 grade | No functional difference in circuit behavior; identical layout, thermal, and reliability profile. | Consider only if dual-sourcing is required - functionally interchangeable with no design change needed. |
Compared with SMAJ12A-E3/52T, SMCG12AHE3/57T delivers 3.75× higher surge immunity and automotive qualification; versus SMCJ12AHE3/57T, it offers identical performance and form factor - making it a direct drop-in alternative within the same Vishay family.
Availability
SMCG12AHE3/57T is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor nodes, DC-DC converter inputs, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCG12AHE3/57T 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 optoelectronics with emphasis on reliability, efficiency, and application-specific validation.
The SMCG series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMCG12AHE3/57T and how does it protect downstream components?
The SMCG12AHE3/57T clamps at 19.9 V when subjected to its rated peak pulse current of 75.4 A (10/1000 µs waveform). This limits the maximum voltage seen by downstream ICs - such as 12 V-rated microcontrollers or gate drivers - ensuring they remain within their absolute maximum ratings during transient events like load dump or inductive switching. The low clamping ratio (VC/VBR ≈ 1.43) reflects efficient energy diversion without excessive overshoot.
Is SMCG12AHE3/57T suitable for automotive applications, and what qualifications does it hold?
Yes, SMCG12AHE3/57T is explicitly AEC-Q101 qualified, meaning it has passed rigorous stress tests for temperature cycling, humidity, mechanical shock, and surge endurance required for automotive electronic modules. Its –55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and glass-passivated junction make it appropriate for under-hood and body-control unit deployments where reliability under thermal and electrical stress is critical.
How does the SMCG (DO-215AB) package of SMCG12AHE3/57T compare to SMA or SMC packages in terms of thermal performance?
The SMCG (DO-215AB) package used by SMCG12AHE3/57T provides superior thermal dissipation compared to SMA (DO-214AC): its larger copper pad area (0.31″ × 0.31″ recommended) yields a typical RθJA of 75 °C/W, versus ~100–120 °C/W for SMA. This allows SMCG12AHE3/57T to sustain higher surge duty cycles without junction overheating - especially important in automotive and industrial applications where ambient temperatures exceed 85 °C.
Can SMCG12AHE3/57T be used in bidirectional configurations?
No - SMCG12AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMCG12CA). Using SMCG12AHE3/57T in a bidirectional configuration would result in forward conduction during negative transients, causing failure. For symmetrical protection, select SMCG12CAHE3/57T instead.
What is the maximum leakage current of SMCG12AHE3/57T at its rated stand-off voltage?
At its 12 V stand-off voltage (VWM), SMCG12AHE3/57T exhibits a maximum reverse leakage current (ID) of 5.0 µA at 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered or always-on systems, avoids loading of high-impedance sensor outputs, and prevents false triggering in precision monitoring circuits - all confirmed per the Vishay datasheet revision 09-Jan-2024.
SMCG12AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC 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):
- 75.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCG)
SMCG12AHE3/57T FAQ
1.How can I place an order for SMCG12AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12AHE3/57T 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 SMCG12AHE3/57T reliable?
The price and inventory of SMCG12AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12AHE3/57T?
SMCG12AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12AHE3/57T 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 SMCG12AHE3/57T?
For technical support, including SMCG12AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12AHE3/57T requirements.
6.How does Aetrix verify that SMCG12AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12AHE3/57T 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 SMCG12AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12AHE3/57T?
All SMCG12AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12AHE3/57T, 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 SMCG12AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG12AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12AHE3/57T Tags
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