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Vishay General Semiconductor - Diodes Division SMCG120AHE3/57T
- Part No.:
- SMCG120AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120AHE3/57T.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,731
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Product details
Overview
SMCG120AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for high-energy surge protection. It features a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 7.8 A peak pulse current (IPPM), and 193 V maximum clamping voltage (VC) - optimized for automotive-grade ESD and load-dump protection on power rails and signal lines.
For engineers reviewing the SMCG120AHE3/57T datasheet, SMCG120AHE3/57T pinout, SMCG120AHE3/57T application, or SMCG120AHE3/57T equivalent, this AEC-Q101 qualified device delivers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for under-hood automotive electronics, industrial power supplies, and robust sensor interface designs.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability requirements.
Thermal design is enabled by RθJA = 75 °C/W and RθJL = 15 °C/W, with operation rated from –55 °C to +150 °C. It sustains 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits <1.0 µA reverse leakage at VWM - confirming suitability for high-reliability DC power rail protection where leakage-sensitive circuits are present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for protected line. |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - tight breakdown window ensures predictable turn-on threshold across temperature and unit variation. |
| VC @ IPPM | 193 V at 7.8 A (10/1000 µs) - clamping voltage directly limits transient overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 1500 W - peak surge energy handling capacity per IEC 61000-4-5 Level 4 compliance testing conditions. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves battery life and avoids false triggering in high-impedance sensing paths. |
| TJ max. | +150 °C - enables under-hood automotive deployment without derating in ambient temperatures up to +125 °C. |
| AEC-Q101 | Qualified - validated for automotive electronic modules requiring stress-tested reliability per JEDEC standards. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount gull-wing leaded package with matte tin-plated terminals, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height. Compliant with J-STD-002 solderability and JESD 22-B102 whisker testing (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to lower-potential side of protected circuit (e.g., ground or return path); enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit terminal in forward conduction mode; marked with band | Connected to higher-potential side (e.g., 12 V rail); reverse-biased during normal operation, avalanches during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS power domains. |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across thermal cycling and humidity exposure. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without baking - simplifies SMT manufacturing flow. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed automotive and industrial enclosures. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system-level immunity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control units against load dump and jump-start surges per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC input, absorbing >1500 W pulses without failure. Use Value: Limits transient voltage to ≤193 V, preventing damage to upstream regulators and microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to MCU ADC inputs in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS shunting ESD events on 0–5 V signal lines, preserving measurement accuracy. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) within nanoseconds while adding negligible capacitance (<100 pF) to signal path. |
| Telecom DC Feeder Protection | Consumer Power Adapter Output Stage |
Use Scenario: Guarding PoE-powered equipment (e.g., IP cameras) against induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at PD input, clamping lightning-induced transients on Ethernet power pairs. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W while maintaining VWM = 120 V margin above nominal 48 V rail. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters to protect connected devices during fault conditions. IC Role / Device Role / Timing Role: Fast-response TVS on 20 V output rail, triggered only during abnormal regulator failure or short-circuit recovery. Use Value: Clamps output to ≤193 V before downstream USB-PD controller or cable connector fails, meeting UL 62368-1 safety limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A-E3/57T | Same VWM (120 V) and PPPM (400 W), but lower power rating and SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump. | Select when cost or board space is constrained and surge energy remains below 400 W. |
| SMCJ120AHE3/57T | Identical VWM, VBR, and PPPM (1500 W), but in larger SMC (DO-214AB) package with higher IFSM (400 A) and lower RθJA (50 °C/W). | Better thermal performance for sustained surge duty cycles; requires larger PCB footprint. | Choose for high-reliability industrial power supplies needing extended surge endurance and thermal headroom. |
Compared with SMAJ120A-E3/57T, SMCG120AHE3/57T delivers 3.75× higher surge power handling in a smaller DO-215AB footprint; versus SMCJ120AHE3/57T, it trades 20% lower thermal resistance for 30% smaller board area - making it optimal for space-constrained AEC-Q101 automotive modules.
Availability
SMCG120AHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant sourcing.
Supply support for SMCG120AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive qualification.
The SMCG series targets high-energy transient suppression in space-constrained, thermally demanding environments - engineered specifically for AEC-Q101 compliance and seamless integration into automotive ECUs and industrial power systems.
FAQ
What is the clamping voltage of SMCG120AHE3/57T at its rated peak pulse current?
The SMCG120AHE3/57T has a maximum clamping voltage (VC) of 193 V when subjected to its specified peak pulse current (IPPM) of 7.8 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 193 V during surge events - a critical parameter for validating protection margins in 12 V/24 V automotive systems where SMCG120AHE3/57T is deployed.
Is SMCG120AHE3/57T suitable for bidirectional transient protection?
No, SMCG120AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMCG120CA variant. Using SMCG120AHE3/57T in bidirectional applications would result in forward conduction during negative transients, potentially causing failure. Always match polarity to circuit topology - SMCG120AHE3/57T is intended for DC rails with defined polarity, such as battery feeds or regulated power outputs.
Does SMCG120AHE3/57T require derating at elevated ambient temperatures?
Yes, SMCG120AHE3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88457). Its peak pulse power capability decreases linearly with junction temperature, reaching ~50% of 1500 W at TJ = 100 °C. Designers must apply thermal modeling using RθJA = 75 °C/W and ensure copper pad layout matches the 0.31" × 0.31" (8.0 mm × 8.0 mm) recommendation to maintain SMCG120AHE3/57T performance under sustained high-temp operation.
What does the "HE3/57T" suffix indicate in SMCG120AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This distinguishes SMCG120AHE3/57T from non-automotive variants (e.g., "E3") and alternate reels (e.g., "9AT" = 13-inch reel, 3500 units). The HE3 grade confirms full automotive qualification - essential for SMCG120AHE3/57T deployment in Tier 1 supply chains and vehicle-level EMC validation.
How does SMCG120AHE3/57T compare to older SMAJ-series TVS diodes in surge handling?
SMCG120AHE3/57T provides 3.75× higher peak pulse power (1500 W vs. 400 W for SMAJ120A) in a similarly compact surface-mount package, enabling single-device replacement of stacked or parallel SMAJ solutions. Its lower clamping voltage (193 V vs. ~215 V for SMAJ120A) and AEC-Q101 qualification make SMCG120AHE3/57T a direct upgrade for next-gen automotive and industrial designs where SMCG120AHE3/57T replaces legacy parts without PCB redesign.
SMCG120AHE3/57T 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMCG120AHE3/57T FAQ
1.How can I place an order for SMCG120AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120AHE3/57T 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 SMCG120AHE3/57T reliable?
The price and inventory of SMCG120AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG120AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120AHE3/57T?
SMCG120AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120AHE3/57T 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 SMCG120AHE3/57T?
For technical support, including SMCG120AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120AHE3/57T requirements.
6.How does Aetrix verify that SMCG120AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG120AHE3/57T 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 SMCG120AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG120AHE3/57T?
All SMCG120AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120AHE3/57T, 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 SMCG120AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG120AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120AHE3/57T Tags
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