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Vishay General Semiconductor - Diodes Division 1.5SMC120AHM3_A/H
- Part No.:
- 1.5SMC120AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120AHM3_A/H.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,269
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Product details
Overview
1.5SMC120AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 120 V standoff voltage (VWM), 165 V maximum clamping voltage (VC) at 9.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive ECUs, industrial motor drives, and telecom power supplies.
For engineers reviewing the 1.5SMC120AHM3_A/H datasheet, 1.5SMC120AHM3_A/H pinout, 1.5SMC120AHM3_A/H application, or 1.5SMC120AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, DO-214AB (SMC) package thermal performance, and verified clamping behavior under repetitive surge conditions.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with <1.0 μA leakage at 102 V, then rapidly avalanches to limit transient voltages above its 114–126 V breakdown range (tested at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
Designed for high-reliability environments, it meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports 200 A non-repetitive forward surge (8.3 ms half-sine), and delivers thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads - enabling use in compact, thermally constrained layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 102 V - Maximum continuous reverse voltage before significant conduction; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 114–126 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping) | 165 V at IPPM = 9.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC-level survivability. |
| PPPM | 1500 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when mounted per recommended pad layout. |
| TJ max | +150 °C - Enables operation in under-hood automotive or industrial ambient environments up to +125 °C with derating. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode | Reverse voltage terminal / Clamping output | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands high-energy surges (e.g., load dump, EFT) without degradation when applied within datasheet limits. |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated transient stress. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising performance. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced damage or delamination. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection fidelity for sensitive ICs. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-connected 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 ground to clamp surges >100 V before reaching microcontroller power inputs. Use Value: Limits peak voltage to 165 V at 9.1 A, preventing latch-up or permanent damage to 3.3 V/5 V logic supply regulators. |
Use Scenario: Safeguarding IGBT gate drivers and MCU interfaces on 300–400 V DC bus sections exposed to switching-induced voltage spikes. IC Role / Device Role / Timing Role: Mounted across bus-to-ground to suppress commutation spikes and inductive kickback during PWM switching. Use Value: 1500 W pulse rating handles repetitive 10/1000 μs events common in VFDs, while 150 °C max junction temperature supports high-ambient operation. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Input-stage protection for AC/DC adapters and PoE injectors subjected to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: First-line defense on primary-side DC input, coordinated with upstream fuses and downstream MOVs. Use Value: Fast response time and low clamping ratio (VC/VBR ≈ 1.36) preserve upstream rectifier and capacitor integrity during multi-kV transients. |
Use Scenario: Overvoltage suppression on microcontroller I/O lines and relay coil flyback paths in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized clamping on 5 V/12 V control signals and solenoid drivers to prevent ESD and inductive coupling damage. Use Value: DO-214AB footprint enables dense placement near connectors and relays; AEC-Q101 qualification ensures field reliability despite non-automotive use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120AHE3_A/H | Same 120 V VWM, but SMB (DO-214AA) package - smaller footprint (3.5 mm × 4.6 mm vs. 7.1 mm × 6.2 mm) and lower PPPM (600 W). | Lower surge handling suits consumer electronics with less severe transients; not rated for AEC-Q101. | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced pad area. |
| 1.5KE120A | Through-hole (DO-201AD) package, identical electrical specs (120 V VWM, 165 V VC), but higher RθJA (~50 °C/W on larger pads) and no AEC-Q101 qualification. | Used in legacy industrial power supplies where manual assembly or high-voltage isolation is prioritized over SMT automation. | Choose only for through-hole designs requiring identical clamping; avoid in automotive or high-volume SMT production. |
Compared with SMBJ120AHE3_A/H and 1.5KE120A, the 1.5SMC120AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity in a surface-mount SMC package, and halogen-free compliance - making it the preferred choice for new automotive and industrial SMT designs requiring validated reliability and high-energy clamping.
Availability
1.5SMC120AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, and telecom power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC120AHM3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where space, thermal performance, and qualification rigor are critical design constraints.
FAQ
What is the clamping voltage of the 1.5SMC120AHM3_A/H under a 10/1000 μs surge?
The 1.5SMC120AHM3_A/H has a maximum clamping voltage (VC) of 165 V when subjected to its rated peak pulse current of 9.1 A with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and represents the highest voltage the protected circuit will experience during such a transient. The 1.5SMC120AHM3_A/H maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is the 1.5SMC120AHM3_A/H qualified for automotive applications?
Yes, the 1.5SMC120AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC series datasheet (Document Number: 88303). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), validating its suitability for under-hood and chassis-mounted automotive electronics. The 1.5SMC120AHM3_A/H is explicitly designated for automotive use in the ordering information table.
What does the "HM3" suffix mean in 1.5SMC120AHM3_A/H?
The "HM3" suffix in 1.5SMC120AHM3_A/H indicates a halogen-free, RoHS-compliant version that is also AEC-Q101 qualified. Per Vishay's ordering guide, HM3 denotes both environmental compliance (no brominated flame retardants, antimony trioxide, or other restricted halogens) and automotive-grade reliability validation. The "_A/H" further specifies packaging: 7-inch tape-and-reel with 850 units per reel. The 1.5SMC120AHM3_A/H thus meets stringent automotive and green electronics requirements simultaneously.
How does the 1.5SMC120AHM3_A/H compare to bidirectional TVS diodes?
The 1.5SMC120AHM3_A/H is unidirectional, meaning it conducts only in reverse bias and requires correct polarity installation - the cathode band must face the protected line. Unlike bidirectional variants (e.g., 1.5SMC120CA), it offers lower leakage current (<1.0 μA at 102 V) and is optimized for DC rail protection where polarity is fixed. The 1.5SMC120AHM3_A/H cannot replace bidirectional types in AC-coupled or floating signal line applications without circuit redesign.
What is the thermal resistance of the 1.5SMC120AHM3_A/H, and how does it affect layout?
The 1.5SMC120AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes standard PCB layout per Vishay's datasheet Figure 2. To maintain safe operation at full 1500 W surge rating or continuous 6.5 W dissipation, designers must adhere to this pad size and consider copper thickness and internal layer connectivity. Reducing pad area increases RθJA and risks thermal runaway during repetitive surges - a key constraint for the 1.5SMC120AHM3_A/H in high-duty-cycle applications.
1.5SMC120AHM3_A/H 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:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC120AHM3_A/H FAQ
1.How can I place an order for 1.5SMC120AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120AHM3_A/H 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 1.5SMC120AHM3_A/H reliable?
The price and inventory of 1.5SMC120AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC120AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120AHM3_A/H?
1.5SMC120AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120AHM3_A/H 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 1.5SMC120AHM3_A/H?
For technical support, including 1.5SMC120AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC120AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120AHM3_A/H 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 1.5SMC120AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC120AHM3_A/H?
All 1.5SMC120AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120AHM3_A/H, 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 1.5SMC120AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC120AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120AHM3_A/H Tags
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