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Vishay General Semiconductor - Diodes Division 1.5SMC120AHE3/9AT
- Part No.:
- 1.5SMC120AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120AHE3/9AT.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,218
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Product details
Overview
1.5SMC120AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 120 V standoff voltage (VWM), 165 V clamping voltage (VC) at 9.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power modules, industrial motor drives, and telecom DC input stages.
For engineers reviewing the 1.5SMC120AHE3/9AT datasheet, 1.5SMC120AHE3/9AT pinout, 1.5SMC120AHE3/9AT application, or 1.5SMC120AHE3/9AT equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with SMC (DO-214AB) PCB footprints and reflow profiles up to 260 °C.
Technical Context
This device operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 114–126 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1 μA at 102 V) and fast response (<1.0 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching spikes before sensitive downstream circuitry is damaged.
Thermally, it sustains 150 °C maximum junction temperature and delivers 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient. The SMC package supports automated placement and meets J-STD-020 MSL Level 1, with matte tin-plated leads compliant to JESD 22-B102 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin. |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 165 V at IPPM = 9.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC/MOSFET survival. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity per IEEE C62.35 10/1000 μs waveform; enables robust lightning/surge immunity. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; determines required copper pad area (8.0 mm × 8.0 mm recommended) for thermal reliability. |
| TJ max. | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability per stress test requirements; designated by HE3 suffix. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge (IFSM = 200 A). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges without cascaded TVS staging. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics; eliminates need for additional qualification testing. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response), preserving margin for 130 V-rated components. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
| Glass passivated junction | Ensures stable leakage current (<1 μA) and long-term parameter stability across temperature and humidity stress. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges above 102 V. Use Value: Limits peak voltage to 165 V during 10/1000 μs events, preventing damage to 150 V-rated MOSFETs and regulators. |
Use Scenario: Input stage protection for variable-frequency drives exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Primary surge clamp on main DC bus (e.g., 300 V nominal) to absorb energy from 1500 W transient events. Use Value: Delivers 1500 W pulse handling without derating at 85 °C ambient, maintaining protection integrity in enclosed cabinets. |
| Telecom DC Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Surge protection on -48 V telecom rectifier outputs subject to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to system ground, clamping reverse surges on negative supply rail. Use Value: Achieves <1 μA leakage at 102 V, minimizing standby power loss while providing 165 V clamping under 9.1 A pulses. |
Use Scenario: Input protection for microcontroller-based washing machine control boards connected to mains-derived 12 V supplies. IC Role / Device Role / Timing Role: Final-stage clamp after fuse and MOV, absorbing residual energy that bypasses upstream protection. Use Value: AEC-Q101 qualification ensures reliability over 10+ year product lifetime despite repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/52 | Lower PPPM (600 W), same VWM (102 V), SMB package (smaller footprint, higher RθJA = 100 °C/W) | Suitable for space-constrained consumer designs with lower surge threat levels (IEC 61000-4-5 Level 2) | Select when board area is limited and peak surge energy does not exceed 600 W. |
| 1.5KE120A | Through-hole DO-201 package, identical electrical specs (VWM = 102 V, VC = 165 V, PPPM = 1500 W), no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT is not required and automotive qualification is unnecessary | Select for cost-sensitive through-hole production or non-automotive applications requiring identical clamping performance. |
Compared with SMBJ120A-E3/52 and 1.5KE120A, the 1.5SMC120AHE3/9AT uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W pulse rating - making it the only option qualified for automotive under-hood deployment without sacrificing surge capability or requiring layout redesign.
Availability
1.5SMC120AHE3/9AT is available at Aetrix Electronics and suitable for automotive power modules, industrial motor drive inputs, and telecom DC power feeds requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5SMC120AHE3/9AT 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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for ruggedized SMT deployment, AEC-Q101 compliance, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC120AHE3/9AT under a 10/1000 μs surge?
The 1.5SMC120AHE3/9AT has a maximum clamping voltage (VC) of 165 V at 9.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard IEEE C62.35 test conditions and reflects the actual voltage imposed on protected circuitry during worst-case surge events - critical for ensuring downstream components rated at 150 V or higher remain within safe operating limits.
Is the 1.5SMC120AHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC120AHE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and documented in Vishay's 1.5SMC series specification (Document Number 88303). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its use in automotive power distribution modules, body control units, and infotainment power supplies.
What package type does the 1.5SMC120AHE3/9AT use, and what are its mounting requirements?
The 1.5SMC120AHE3/9AT uses the SMC (DO-214AB) surface-mount package, with recommended copper pad dimensions of 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal. It is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. The cathode is marked by a band, and polarity must be observed during placement to ensure correct unidirectional clamping behavior.
How does the 1.5SMC120AHE3/9AT compare to bidirectional TVS diodes like 1.5SMC120CA?
The 1.5SMC120AHE3/9AT is unidirectional and optimized for DC rail protection where polarity is fixed (e.g., +12 V or -48 V lines), offering lower leakage (<1 μA at 102 V) and tighter VBR tolerance. In contrast, 1.5SMC120CA is bidirectional and suited for AC or floating signal lines, but exhibits higher leakage and symmetric clamping in both directions - making the 1.5SMC120AHE3/9AT preferable for low-leakage, polarity-defined DC protection applications.
What is the maximum junction temperature and thermal resistance of the 1.5SMC120AHE3/9AT?
The 1.5SMC120AHE3/9AT has a maximum junction temperature (TJ max.) of 150 °C and a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads. These values define its thermal design envelope: at 6.5 W steady-state dissipation, ambient temperature must remain below 50 °C to avoid exceeding TJ max., aligning with under-hood automotive and enclosed industrial environments.
1.5SMC120AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC120AHE3/9AT FAQ
1.How can I place an order for 1.5SMC120AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120AHE3/9AT 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 1.5SMC120AHE3/9AT reliable?
The price and inventory of 1.5SMC120AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC120AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120AHE3/9AT?
1.5SMC120AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120AHE3/9AT 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 1.5SMC120AHE3/9AT?
For technical support, including 1.5SMC120AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC120AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120AHE3/9AT 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 1.5SMC120AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC120AHE3/9AT?
All 1.5SMC120AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120AHE3/9AT, 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 1.5SMC120AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC120AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120AHE3/9AT Tags
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