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Taiwan Semiconductor Corporation 1.5SMC120AH
- Part No.:
- 1.5SMC120AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120AH.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,053
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Product details
Overview
1.5SMC120AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 120V breakdown voltage range (114–126V), 1500W peak pulse power rating, 102V working stand-off voltage, <1µA leakage at VWM, and clamps transients to ≤165V at 9.5A peak impulse current. It is widely used in automotive power supply inputs compliant with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the 1.5SMC120AH datasheet, 1.5SMC120AH pinout, 1.5SMC120AH application, or 1.5SMC120AH equivalent, key selection criteria include clamping voltage vs. protected IC VDS(max), thermal resistance (RθJC = 15°C/W), AEC-Q101 qualification, DO-214AB package compatibility, and unidirectional polarity marking for correct PCB orientation.
Technical Context
The 1.5SMC120AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown and fast response (<1.0ps). Its clamping behavior follows IEEE C62.35 standards, with defined 10/1000μs surge waveform compliance and derating per ambient temperature (RθJA = 50°C/W).
It is rated for steady-state power dissipation of 6.5W at 25°C, supports 200A non-repetitive forward surge (8.3ms half-sine), and maintains junction temperature between –55°C and +150°C. Polarity is marked by cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 114V / 126V - Ensures reliable avalanche conduction onset within tight tolerance for predictable clamping start point |
| VWM | 102V - Maximum continuous DC or RMS voltage the device blocks without significant leakage (<1µA) |
| VC@IPPM | ≤165V at 9.5A - Limits downstream voltage stress during 10/1000μs transients to protect 150V-rated components |
| PPK | 1500W - Sustains high-energy surges (e.g., ISO 7637-2 Pulse 1, 2b, 3b) without failure |
| RθJC | 15°C/W - Enables effective heat transfer to PCB copper when mounted with adequate thermal pad area |
| TJ max | +150°C - Supports operation in under-hood automotive environments and industrial enclosures |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11mm × 6.22mm footprint and 2.3mm height |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band on one end. Weight ≈ 0.210g. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms current path during reverse-biased clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12V battery rail); marked by band; conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test conditions |
| Glass passivated junction | Provides stable VBR over lifetime and immunity to humidity-induced parameter drift |
| ISO 7637-2 compliance | Guarantees survivability against load-dump, alternator ripple, and inductive switching transients in 12V/24V systems |
| Fast response time | <1.0ps enables clamping before sensitive downstream circuitry experiences damaging voltage overshoot |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Automotive Power Input Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V battery rail in engine control units exposed to load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of DC-DC converter input to limit voltage excursion to ≤165V. Use Value: Prevents damage to 150V-input buck controllers by limiting clamped voltage below their absolute maximum rating. | Use Scenario: 24V digital input module in factory automation subject to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector on field-side signal line, absorbing 1kV/40Ω ring wave surges per IEC 61000-4-5. Use Value: Maintains signal integrity by clamping transients within 10/1000μs while adding <1pF capacitance to avoid signal distortion. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: -48V telecom power distribution board subjected to lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Primary surge suppression stage before hot-swap controller and POL converters. Use Value: Absorbs up to 1500W peak energy without degradation, enabling single-stage protection architecture. | Use Scenario: Brushed DC motor driver in smart home appliances experiencing commutation spikes during PWM switching. IC Role / Device Role / Timing Role: Flyback energy absorber across motor terminals, routed to chassis ground via low-inductance path. Use Value: Reduces EMI emissions by suppressing >100V spikes, meeting CISPR 14-1 conducted emission 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 |
|---|---|---|---|
| SMBJ120A | Same DO-214AA package; lower PPK = 600W; VC = 193V @ 3.1A; RθJC = 20°C/W | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients | Select only if system-level surge energy is confirmed ≤600W and clamping voltage margin allows 193V |
| 1.5KE120A | Through-hole DO-15; same VBR/VC specs; PPK = 1500W; no AEC-Q101 qualification | Requires manual assembly; not validated for automotive temperature cycling or vibration | Use only in non-automotive industrial designs where automated SMT is not required |
Compared with SMBJ120A and 1.5KE120A, the 1.5SMC120AH uniquely combines SMT manufacturability, AEC-Q101 qualification, and full ISO 7637-2 compliance in the DO-214AB footprint-making it the preferred choice for automotive front-end protection where space, reliability, and standard compliance are jointly critical.
Availability
1.5SMC120AH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial programmable logic controller (PLC) I/O modules, and telecom DC feed protection requiring stable component supply and AEC-Q101 traceability.
Supply support for 1.5SMC120AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The 1.5SMCxxAH series was developed specifically for AEC-Q101-compliant automotive and industrial surge protection, emphasizing robustness under repetitive transient stress, tight VBR tolerance, and compatibility with high-speed automated placement.
FAQ
What is the polarity configuration of the 1.5SMC120AH?
The 1.5SMC120AH is a unidirectional TVS diode with cathode marked by a band on the DO-214AB package. It conducts during reverse-bias overvoltage events and blocks up to 102V in forward bias. This polarity must be observed during PCB layout to ensure proper clamping direction on positive-rail protection applications.
Does the 1.5SMC120AH meet AEC-Q101 requirements for automotive use?
Yes, the 1.5SMC120AH is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version B2207). It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock-validating its suitability for under-hood and dashboard-mounted automotive electronics.
What is the maximum clamping voltage of the 1.5SMC120AH under standard test conditions?
The 1.5SMC120AH has a maximum clamping voltage (VC) of 165V when subjected to its rated peak impulse current (IPPM) of 9.5A using the 10/1000μs waveform defined in Fig.5 of the datasheet. This value is guaranteed across the full operating temperature range.
Can the 1.5SMC120AH be used in bidirectional applications?
No-the 1.5SMC120AH is unidirectional only. For bidirectional protection, TSC specifies part numbers with "CH" or "CAH" suffixes (e.g., 1.5SMC120ACH). Using the 1.5SMC120AH in AC or dual-polarity circuits will result in forward conduction and potential failure during negative transients.
What is the thermal resistance from junction to case (RθJC) for the 1.5SMC120AH?
The junction-to-case thermal resistance (RθJC) of the 1.5SMC120AH is 15°C/W, measured under standardized low-thermal-resistance mounting conditions. This value enables accurate thermal modeling when designing PCB copper pour areas for sustained 6.5W power dissipation at elevated ambient temperatures.
1.5SMC120AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- 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):
- 9.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC120AH FAQ
1.How can I place an order for 1.5SMC120AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120AH 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 1.5SMC120AH reliable?
The price and inventory of 1.5SMC120AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC120AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120AH?
1.5SMC120AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120AH 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 1.5SMC120AH?
For technical support, including 1.5SMC120AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120AH requirements.
6.How does Aetrix verify that 1.5SMC120AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120AH 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 1.5SMC120AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC120AH?
All 1.5SMC120AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120AH, 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 1.5SMC120AH part is unused and in its original packaging.
Return procedure for 1.5SMC120AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120AH Tags
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