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Vishay General Semiconductor - Diodes Division SMCG120A-E3/57T
- Part No.:
- SMCG120A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120A-E3/57T.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG120A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, featuring 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 clamping voltage (VC). It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain and industrial motor control systems against inductive switching transients.
For engineers reviewing the SMCG120A-E3/57T datasheet, SMCG120A-E3/57T pinout, SMCG120A-E3/57T application, or SMCG120A-E3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), RoHS-compliant E3 suffix, and bidirectional alternative options - all critical for ESD/surge protection design-in and automotive-grade BOM validation.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, entering avalanche conduction when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while the DO-215AB package enables automated placement and meets UL 94 V-0 flammability rating.
Designed for single-polarity surge suppression, SMCG120A-E3/57T supports unidirectional operation only (cathode-banded polarity), with 200 A IFSM rating for 8.3 ms half-sine surges and 150 °C maximum junction temperature. It is not rated for bidirectional use - that function requires CA-suffix variants like SMCG120CA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 133 V / 147 V at 1 mA - Confirmed breakdown threshold window; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 193 V - Clamped voltage during 7.8 A 10/1000 µs transient; determines maximum stress on protected downstream components. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; quantifies transient energy absorption capability. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8.0 mm × 8.0 mm copper pads; guides PCB thermal layout requirements. |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper limit for ambient + self-heating in sealed enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test standard; required for powertrain and chassis applications. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount gull-wing leaded case 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. Complies with J-STD-002 solderability and JESD22-B102 whisker testing (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; grounded node in typical unidirectional TVS configuration. | Connected to system ground or low-impedance return path; must handle full surge current without voltage rise. |
| Cathode | Current exit terminal in forward bias; protected line connection point in reverse-bias clamping mode. | Connected to I/O line or power rail being protected; marked by cathode band; defines polarity-sensitive placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and powertrain applications requiring high-reliability surge immunity. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift due to moisture or contamination. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients; improves clamping precision for sensitive 12 V/24 V microcontrollers. |
| MSL Level 1 (260 °C peak) | Enables standard SMT reflow without preconditioning; compatible with industrial and automotive assembly lines. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed automotive ECUs and industrial PLCs. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and current-sense amplifiers in 12 V/24 V engine control units from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across MOSFET gate-source or op-amp inputs. Use Value: Limits transient voltage to ≤193 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces tied to high-side switches. |
Use Scenario: Shielding encoder feedback lines and analog sensor inputs in variable-frequency drives exposed to relay switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential RS-422 or single-ended 0–10 V analog channels. Use Value: Absorbs 1500 W surges without degradation, maintaining signal integrity during 100 ns–1 µs EFT bursts per IEC 61000-4-4. |
| Telecom Power Supply Input | Consumer Appliance Mainboard Surge Guard |
|
Use Scenario: Front-end protection of 48 V telecom rectifier outputs against lightning-induced surges on distribution bus lines. IC Role / Device Role / Timing Role: Primary-stage TVS mounted upstream of DC-DC converters and hot-swap controllers. Use Value: Withstands 200 A IFSM half-sine surges and maintains <1.0 µA leakage at 120 V, ensuring low standby power loss. |
Use Scenario: Safeguarding microcontroller reset lines and USB-C PD communication pins in smart home hubs during AC line transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on 3.3 V rails with minimal signal distortion. Use Value: Delivers 193 V clamping at 7.8 A with RθJA = 75 °C/W, enabling compact layout without forced-air cooling. |
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 (1500 W), but SMA (DO-214AC) package; 10% higher RθJA (83 °C/W); no AEC-Q101 qualification. | Acceptable for industrial/commercial designs where automotive qualification is not required and board space allows larger footprint. | Select SMAJ120A-E3/57T only if DO-215AB footprint is unavailable and thermal margin permits higher junction rise. |
| SMCG120CA-E3/57T | Bidirectional variant with identical VWM (120 V), VBR (133–147 V), and PPPM (1500 W); same DO-215AB package and AEC-Q101 rating. | Required for AC-coupled or floating signal lines (e.g., CAN bus, audio inputs) where polarity reversal occurs. | Choose SMCG120CA-E3/57T when protecting symmetric interfaces; SMCG120A-E3/57T remains optimal for DC-biased unidirectional rails. |
Compared with SMAJ120A-E3/57T, SMCG120A-E3/57T offers lower thermal resistance and automotive qualification; versus SMCG120CA-E3/57T, it provides tighter leakage control and optimized clamping for grounded-line protection - making it the preferred choice for 120 V DC power rail and microcontroller I/O safeguarding.
Availability
SMCG120A-E3/57T is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drive I/O interfaces, and telecom rectifier input stages requiring stable component supply, AEC-Q101 compliance, and consistent 1500 W surge handling.
Supply support for SMCG120A-E3/57T 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 application-specific performance.
The SMCG series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems needing robust, AEC-Q101-qualified TVS solutions in compact DO-215AB packaging.
FAQ
What is the clamping voltage of SMCG120A-E3/57T at its rated peak pulse current?
The SMCG120A-E3/57T has a maximum clamping voltage (VC) of 193 V when subjected to its specified peak pulse current (IPPM) of 7.8 A under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during transient events. The SMCG120A-E3/57T maintains this clamping performance across its full operating temperature range.
Is SMCG120A-E3/57T suitable for bidirectional signal line protection?
No, SMCG120A-E3/57T is a unidirectional TVS diode and must be used only with defined polarity - cathode connected to the line being protected, anode to ground. For bidirectional protection (e.g., AC signals, differential buses), the SMCG120CA-E3/57T variant is required. Using SMCG120A-E3/57T on bidirectional lines risks failure during negative transients, as it lacks symmetrical breakdown characteristics. Always verify polarity alignment before placing SMCG120A-E3/57T in circuit.
Does SMCG120A-E3/57T meet automotive qualification standards?
Yes, SMCG120A-E3/57T carries AEC-Q101 qualification, confirming its suitability for automotive electronic modules including engine control units, body control modules, and ADAS sensors. The E3 suffix indicates RoHS-compliant, industrial-grade construction, and the device is tested per stress test conditions defined in the AEC-Q101 standard. This makes SMCG120A-E3/57T appropriate for under-hood and chassis applications where reliability under thermal cycling and vibration is mandatory.
What is the thermal resistance and recommended pad layout for SMCG120A-E3/57T?
The SMCG120A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. To achieve this rating, designers must implement minimum recommended pad dimensions and ensure adequate copper area and via stitching to internal ground planes. Deviations reduce thermal performance and may cause premature thermal runaway during repetitive surge events. The SMCG120A-E3/57T datasheet provides exact mounting footprint dimensions for DO-215AB.
How does the E3/57T suffix affect packaging and compliance of SMCG120A-E3/57T?
The "E3" suffix denotes RoHS-compliant, matte tin-plated leads meeting J-STD-002 solderability and JESD22-B102 Class 2 whisker resistance. The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with 850 units per reel. This configuration supports high-speed SMT placement and complies with IPC-7351B land pattern standards. No halogen-free or AEC-Q101-specific suffix (e.g., HE3) is present - for automotive-qualified versions, SMCG120AHE3/57T would be required. SMCG120A-E3/57T itself is AEC-Q101 qualified per the base family specification.
SMCG120A-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG120A-E3/57T FAQ
1.How can I place an order for SMCG120A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120A-E3/57T 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 SMCG120A-E3/57T reliable?
The price and inventory of SMCG120A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG120A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120A-E3/57T?
SMCG120A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120A-E3/57T 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 SMCG120A-E3/57T?
For technical support, including SMCG120A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120A-E3/57T requirements.
6.How does Aetrix verify that SMCG120A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG120A-E3/57T 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 SMCG120A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG120A-E3/57T?
All SMCG120A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120A-E3/57T, 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 SMCG120A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG120A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120A-E3/57T Tags
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