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Taiwan Semiconductor Corporation 1.5SMC120CAH
- Part No.:
- 1.5SMC120CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CAH.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,893
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Product details
Overview
1.5SMC120CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 114V–126V breakdown voltage (VBR), 102V working stand-off voltage (VWM), and 165V maximum clamping voltage (VC) at 9.5A peak impulse current - designed for ESD and surge protection in automotive power-line interfaces.
For engineers reviewing the 1.5SMC120CAH datasheet, 1.5SMC120CAH pinout, 1.5SMC120CAH application, or 1.5SMC120CAH equivalent, this device serves as a high-energy, AEC-Q101-qualified TVS for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance in harsh automotive environments where fast response (<1.0 ps), low leakage (<1 µA @ 102V), and robust thermal performance (RθJA = 50°C/W) are critical.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling single-device protection of AC-coupled or floating signal/power lines without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.107%/°C), while meeting JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
The device delivers 1500W peak pulse power (10/1000 µs waveform), with clamping performance validated up to 165V at 9.5A IPPM and thermal derating down to zero power at 150°C ambient - supporting reliable operation in under-hood automotive modules and industrial power supplies exposed to load dump and lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V / 126 V - Ensures consistent breakdown initiation across production lots and temperature range (-55°C to +150°C) |
| VWM | 102 V - Maximum continuous reverse voltage before significant leakage; allows safe operation on 87–100V DC bus systems |
| VC @ IPPM | 165 V @ 9.5 A - Clamps transient energy within safe margin below system overvoltage thresholds (e.g., <200V rail) |
| PPK | 1500 W - Handles high-energy ISO 7637-2 Pulse 5a (load dump) surges without failure |
| IR @ VWM | <1 µA - Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits |
| TJ max | +150 °C - Enables placement near heat-generating components (e.g., MOSFETs, DC-DC converters) without derating |
| Response time | <1.0 ps - Limits voltage overshoot during ESD events (IEC 61000-4-2) before downstream ICs are damaged |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, UL 94V-0 molding compound, 0.210 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; either terminal accepts positive or negative surge - simplifies PCB layout and eliminates orientation errors during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for engine control units and ADAS power rails |
| ISO 7637-2 compliance | Tested against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (ignition noise) - meets OEM-level EMC requirements |
| Glass passivated junction | Stable VBR drift <0.1%/°C and low leakage across life cycle - critical for long-term field reliability in unattended equipment |
| Fast response <1.0 ps | Clamps sub-nanosecond ESD transients before propagation into CAN/LIN transceivers or microcontrollers |
| Moisture sensitivity Level 1 | No bake preconditioning required before reflow - reduces manufacturing cost and avoids thermal stress on adjacent components |
Applications
| Automotive Power Line Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point, shunting surge energy to ground before reaching DC-DC regulators and MCU power pins. Use Value: Withstands 1500W peak power and clamps to 165V, keeping downstream 3.3V/5V LDOs and microcontrollers within absolute maximum ratings during 120V transients. |
Use Scenario: Shielding CANH/CANL differential pair from ESD (IEC 61000-4-2 ±15kV contact) and coupled transients in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CANH–CANL and from each line to chassis ground, providing symmetrical overvoltage limiting. Use Value: Sub-1ps response prevents bit errors during fast ESD events; low capacitance (~100 pF typical) avoids signal integrity degradation at 1 Mbps CAN FD rates. |
| Telecom DC Power Input | Smart Meter AC/DC Front-End |
Use Scenario: Safeguarding PoE-powered switches and base station RF modules against lightning-induced surges on 48V DC input rails. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converters and hot-swap controllers. Use Value: 102V VWM allows compatibility with 48V nominal +20% tolerance systems; 165V clamping prevents latch-up in 200V-rated MOSFETs used in secondary regulation. |
Use Scenario: Protecting metering SoCs and isolated ADCs from surges entering via AC mains rectification and bulk capacitor charging paths. IC Role / Device Role / Timing Role: Secondary TVS after MOV primary stage, absorbing residual high-frequency energy missed by slower varistors. Use Value: Low leakage (<1 µA) avoids loading precision voltage references; DO-214AB footprint supports high-density meter PCB layouts with minimal creepage/clearance impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | Same VBR range (114–126V), but lower PPK = 600W and larger SMB package (DO-214AA) | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD and switching noise | Select only when space allows larger footprint and surge energy is capped at ≤600W |
| 1.5KE120CA | Through-hole TO-218 package, same 1500W rating, but slower response (>1 ns) and no AEC-Q101 qualification | Cannot meet automotive qualification requirements; unsuitable for automated SMT assembly | Use only in legacy through-hole designs where rework to SMT is not feasible |
Compared with SMBJ120CA and 1.5KE120CA, the 1.5SMC120CAH uniquely combines automotive qualification, surface-mount scalability, and full 1500W ISO 7637-2 capability in a compact DO-214AB outline - making it the preferred choice for new automotive and industrial SMT platforms requiring certified surge resilience.
Availability
1.5SMC120CAH is available at Aetrix Electronics and suitable for automotive control units, industrial CAN networks, telecom power inputs, and smart meter front-ends requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC120CAH 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 high-reliability protection devices, rectifiers, and power management components.
The 1.5SMCxxCAH series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting replacement of legacy axial-leaded and through-hole TVS diodes with scalable, automated-placement-ready SMT solutions for 12V/24V/48V systems.
FAQ
What is the breakdown voltage tolerance for 1.5SMC120CAH?
The 1.5SMC120CAH has a specified breakdown voltage range of 114 V to 126 V at 1 mA test current, representing a ±5% tolerance around the nominal 120 V rating. This tight VBR spread ensures predictable clamping behavior across temperature and production batches, critical for compliance with ISO 7637-2 Pulse 2b and Pulse 3b limits in automotive applications.
Is 1.5SMC120CAH suitable for bidirectional signal line protection?
Yes, the 1.5SMC120CAH is explicitly designed as a bidirectional TVS diode, with identical electrical characteristics in both polarities. It is commonly deployed across differential buses like CAN, RS-485, and Ethernet PHY interfaces where symmetrical surge suppression is required - confirmed by its CAH suffix and specification notes stating "electrical characteristics apply in both directions".
Does 1.5SMC120CAH meet AEC-Q101 stress test requirements?
Yes, 1.5SMC120CAH is AEC-Q101 qualified per the manufacturer's documentation, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥8 kV, CDM ≥1 kV). This qualification validates its suitability for under-hood automotive applications where reliability under thermal and electrical stress is mandatory.
What is the maximum clamping voltage of 1.5SMC120CAH at rated peak current?
The 1.5SMC120CAH exhibits a maximum clamping voltage (VC) of 165 V at its rated peak impulse current (IPPM) of 9.5 A, measured using the standard 10/1000 µs double-exponential waveform. This clamping level provides a 35 V safety margin below the 200 V absolute maximum rating of common 200 V MOSFETs used in automotive power stages.
Can 1.5SMC120CAH be used in place of unidirectional 1.5SMC120H?
No - the 1.5SMC120CAH is bidirectional and lacks polarity marking, while the 1.5SMC120H is unidirectional with a defined cathode band. Substituting them requires circuit review: 1.5SMC120CAH may be used in AC or floating applications, but will not provide correct polarity-dependent clamping in DC-biased unidirectional paths such as 12V supply-to-ground protection where forward conduction must be blocked.
1.5SMC120CAH 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC120CAH FAQ
1.How can I place an order for 1.5SMC120CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CAH 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 1.5SMC120CAH reliable?
The price and inventory of 1.5SMC120CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CAH?
1.5SMC120CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CAH 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 1.5SMC120CAH?
For technical support, including 1.5SMC120CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CAH requirements.
6.How does Aetrix verify that 1.5SMC120CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CAH 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 1.5SMC120CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CAH?
All 1.5SMC120CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CAH, 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 1.5SMC120CAH part is unused and in its original packaging.
Return procedure for 1.5SMC120CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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