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Vishay General Semiconductor - Diodes Division SMCG120CAHE3/9AT
- Part No.:
- SMCG120CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120CAHE3/9AT.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,916
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Product details
Overview
SMCG120CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 µs), 133–147 V breakdown voltage (VBR), and 193 A peak pulse current (IPPM). It protects sensitive ICs and MOSFETs in automotive powertrain control units against inductive switching transients.
For engineers reviewing the SMCG120CAHE3/9AT datasheet, SMCG120CAHE3/9AT pinout, SMCG120CAHE3/9AT application, or SMCG120CAHE3/9AT equivalent, this AEC-Q101-qualified TVS offers verified clamping performance at 258 V (VC), low thermal resistance (RθJA = 75 °C/W), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping and breakdown behavior in forward and reverse directions - critical for protecting AC-coupled signal lines and differential buses. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM = 120 V) and fast response time (<1 ns) to ESD and lightning-induced surges.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 (260 °C peak reflow), enabling use in under-hood automotive modules without derating. Its DO-215AB package provides mechanical robustness and thermal performance via 8.0 mm × 8.0 mm copper pad layout per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - defines reliable conduction onset for overvoltage events above system operating voltage |
| VWM | 120 V - maximum continuous reverse stand-off voltage; ensures no conduction during normal 12 V/24 V automotive bus operation |
| VC @ IPPM | 258 V at 193 A (10/1000 µs) - clamping voltage limits downstream component stress during worst-case surge |
| PPPM | 1500 W - peak pulse power handling capacity supports ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 compliance |
| IPPM | 193 A - peak surge current capability enables protection of high-current power rails and gate drivers |
| RθJA | 75 °C/W - thermal resistance determines required PCB copper area for sustained power dissipation (6.5 W at TA = 50 °C) |
| Junction Temp | −55 °C to +150 °C - qualified for engine control, transmission, and ADAS modules exposed to extreme ambient conditions |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with matte tin-plated terminals; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge energy into ground path when voltage exceeds VBR in either polarity |
| Cathode | Transient current entry (negative half-cycle) | Symmetric conduction path ensures identical clamping for AC or bidirectional signals |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications with zero defects in accelerated lifetime testing |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and low leakage (<1 µA) over 15-year field life |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., load dump, ESD), reducing risk of latch-up |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without popcorn cracking or delamination |
| 1500 W peak pulse power | Supports protection of 12 V/24 V systems against ISO 7637-2 Pulse 5 (load dump) up to 120 V test levels |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting microcontroller I/O and gate driver inputs in engine control units exposed to alternator load dump and solenoid coil flyback. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, responding within <1 ns to transients exceeding 120 V. Use Value: Limits voltage seen by 5 V/3.3 V logic to ≤258 V, preventing permanent damage to MCU GPIOs and isolated gate drivers. |
Use Scenario: Safeguarding analog sensor inputs (e.g., current shunt amplifiers) on variable-frequency drives subjected to inverter switching noise. IC Role / Device Role / Timing Role: Low-capacitance (≈50 pF) bidirectional clamp on differential signal lines, suppressing common-mode surges without distorting 10 kHz–1 MHz feedback signals. Use Value: Maintains signal integrity while absorbing >1 kA surge energy from adjacent IGBT commutation paths. |
| Telecom Line Interface Protection | Automotive Body Electronics |
|
Use Scenario: Shielding RS-485 transceivers in outdoor base station backhaul links from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Symmetrical clamping device across differential pair (A/B), referenced to local ground with minimal parasitic inductance. Use Value: Clamps ±258 V transients while preserving DC common-mode range and data rates up to 20 Mbps. |
Use Scenario: Securing LIN bus transceivers and LED driver ICs in door module ECUs against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT input, placed upstream of LDO regulators and CAN/LIN interface ICs. Use Value: Withstands 120 V reverse-battery tests and 200 A surge pulses without degradation, ensuring ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120CA | Same VWM (120 V), lower PPPM (400 W), SMA package (DO-214AC), higher RθJA (110 °C/W) | Limited to low-energy surges; unsuitable for ISO 7637-2 Pulse 5 or high-current motor drive protection | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| SMCJ120CA | Same VWM (120 V), higher PPPM (1500 W), but larger SMC package (DO-214AB), same RθJA (75 °C/W) | Requires larger PCB footprint; better suited for high-volume industrial power supplies than space-constrained automotive modules | Choose when thermal margin is critical and board real estate allows DO-214AB outline |
Compared with SMAJ120CA and SMCJ120CA, the SMCG120CAHE3/9AT delivers identical surge power rating in a smaller DO-215AB footprint and AEC-Q101 qualification - making it optimal for next-generation automotive ECUs where size, reliability, and qualification are jointly prioritized.
Availability
SMCG120CAHE3/9AT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, telecom line interface protection, and automotive body electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCG120CAHE3/9AT 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive electronics, emphasizing low-profile packaging, repeatable clamping, and extended thermal endurance.
FAQ
What is the clamping voltage of SMCG120CAHE3/9AT at its rated peak pulse current?
The SMCG120CAHE3/9AT has a maximum clamping voltage (VC) of 258 V at 193 A peak pulse current (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during a surge event. The SMCG120CAHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG120CAHE3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMCG120CAHE3/9AT is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation and marked by the "HE3" suffix (RoHS-compliant, AEC-Q101 qualified). It is validated for use in engine control units, transmission controllers, and ADAS modules where reliability under thermal cycling, humidity, and mechanical shock is mandatory. The SMCG120CAHE3/9AT meets all stress test requirements defined in the AEC-Q101 standard.
What does the "CA" suffix indicate in SMCG120CAHE3/9AT?
The "CA" suffix in SMCG120CAHE3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics for positive and negative voltage excursions. This is essential for protecting AC-coupled interfaces, differential buses, and circuits where polarity reversal may occur. The SMCG120CAHE3/9AT exhibits matched VBR (133–147 V) and VC (258 V) in both directions.
What is the thermal resistance of SMCG120CAHE3/9AT, and how does it affect PCB layout?
The SMCG120CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value directly dictates minimum copper area needed to maintain safe junction temperatures during repetitive surge events or continuous power dissipation. Reducing pad size increases RθJA, risking thermal runaway - so the SMCG120CAHE3/9AT must be laid out per Vishay's recommended footprint to achieve rated 6.5 W power dissipation at 50 °C ambient.
How does SMCG120CAHE3/9AT differ from unidirectional variants like SMCG120AHE3/9AT?
The SMCG120CAHE3/9AT is bidirectional with symmetrical electrical behavior, while SMCG120AHE3/9AT is unidirectional and conducts only in reverse bias - it features a cathode band marking and supports forward surge current (IFSM = 200 A). The SMCG120CAHE3/9AT lacks polarity marking, has no IFSM rating, and is used where voltage transients can swing positive or negative relative to ground - such as on differential communication lines or AC-sensing inputs.
SMCG120CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCG120CAHE3/9AT FAQ
1.How can I place an order for SMCG120CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120CAHE3/9AT 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 SMCG120CAHE3/9AT reliable?
The price and inventory of SMCG120CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG120CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120CAHE3/9AT?
SMCG120CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120CAHE3/9AT 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 SMCG120CAHE3/9AT?
For technical support, including SMCG120CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG120CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG120CAHE3/9AT 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 SMCG120CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG120CAHE3/9AT?
All SMCG120CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120CAHE3/9AT, 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 SMCG120CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG120CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120CAHE3/9AT Tags
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