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Taiwan Semiconductor Corporation 1.5SMC12AH
- Part No.:
- 1.5SMC12AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AH.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,669
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Product details
Overview
1.5SMC12AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 11.4–12.6 V breakdown voltage (VBR), 10.2 V working stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC) at 94 A peak pulse current, and 1500 W peak pulse power rating - suitable for automotive load-dump and ESD protection in infotainment power supplies.
For engineers reviewing the 1.5SMC12AH datasheet, 1.5SMC12AH pinout, 1.5SMC12AH application, or 1.5SMC12AH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, and <1 µA leakage above 10 V - critical for robust front-end protection in automotive ECUs and industrial controllers.
Technical Context
The 1.5SMC12AH operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast clamping of transients before sensitive downstream circuitry is damaged. Its DO-214AB (SMC) package supports automated placement and provides thermal resistance of RθJA = 50 °C/W and RθJC = 15 °C/W.
It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with polarity indicated by cathode band marking. The device is rated for junction temperatures from –55 °C to +150 °C and exhibits a VBR temperature coefficient of 0.078 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V - defines reliable avalanche initiation range under 1 mA test current; ensures consistent turn-on across temperature and unit variation |
| VWM | 10.2 V - maximum continuous reverse operating voltage; sets safe DC bias margin below breakdown |
| VC @ IPPM | 16.7 V at 94 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on protected ICs |
| PPK | 1500 W - peak pulse power handling per 1 ms waveform; enables survival of high-energy automotive transients |
| IR @ VWM | <1 µA - ultra-low leakage at stand-off voltage; avoids unnecessary power loss in battery-powered systems |
| Response time | <1.0 ps - intrinsic junction speed; ensures clamping occurs before most IC damage thresholds are exceeded |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case material meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; tied to system ground in typical unidirectional TVS placement | Provides low-impedance path to ground for transient energy when VAK exceeds VC; must be routed with minimal inductance |
| Cathode | Protected line connection; connected to the rail or signal requiring overvoltage immunity | Receives transient voltage; clamps to VC relative to Anode when reverse-biased beyond VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control and ADAS modules |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees survivability against real-world vehicle electrical disturbances including battery disconnect and inductive switching noise |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives - critical for 15+ year automotive service life |
| Moisture sensitivity level 1 (J-STD-020) | Enables direct placement without baking - reduces manufacturing cost and avoids moisture-induced popcorning during reflow |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU directives - supports global environmental compliance and end-of-life recycling requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs in body control modules (BCM) from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Withstands 1500 W pulses and clamps to ≤16.7 V, preventing latch-up or burnout in downstream 16 V-rated regulators. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature sensors) from ESD events in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal lines, grounded via short trace to minimize added noise. Use Value: Sub-1 ps response and <1 µA leakage preserve signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air) requirements. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Port Protection |
|
Use Scenario: Safeguarding 12 V/24 V PoE-powered network switches against lightning-induced surges on upstream DC input. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC input, coordinated with secondary-stage MOVs and filters. Use Value: 10.2 V VWM allows full utilization of 12 V nominal rail while clamping to 16.7 V - within safe margin of 20 V-rated DC-DC converters. |
Use Scenario: Adding robustness to USB-C PD port VBUS lines in portable monitors against hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, selected for low leakage to avoid false undervoltage detection. Use Value: 1 µA max IR at 10.2 V prevents interference with USB PD communication and maintains tight voltage regulation during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A (ON Semiconductor) | Same DO-214AA (SMB) package; 12.2–13.5 V VBR, 19.9 V VC @ 75 A, 600 W PPK | Lower peak power rating limits use in automotive load dump; better suited for consumer-grade surge suppression | Select when space constraints favor SMB footprint and surge energy is ≤600 W |
| 1.5KE12A (Taiwan Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but 1500 W rating; higher RθJA (70 °C/W) | Requires PCB through-hole assembly; less suitable for high-density automotive PCBs but offers identical protection performance | Choose for legacy designs or where manual repair/rework is preferred over SMT |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12AH delivers higher surge robustness in a compact SMC package with automotive-qualified reliability - making it optimal for new ECU and ADAS designs where board space and AEC-Q101 compliance are mandatory.
Availability
1.5SMC12AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input circuits requiring stable component supply, AEC-Q101 validation, and ISO 7637-2 compliance.
Supply support for 1.5SMC12AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - serving automotive, industrial, and consumer markets since 1979.
The 1.5SMCxxAH series was engineered specifically for AEC-Q101-compliant, high-reliability transient suppression in automotive power distribution networks - balancing clamping performance, thermal robustness, and SMT manufacturability.
FAQ
What is the polarity configuration of the 1.5SMC12AH?
The 1.5SMC12AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB (SMC) package. It conducts only when the cathode is at a higher potential than the anode - making it ideal for protecting positive DC rails against negative-going transients and reverse-voltage faults. This polarity must be observed during PCB layout to ensure proper clamping behavior.
Does the 1.5SMC12AH meet automotive qualification standards?
Yes, the 1.5SMC12AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. It is rated for junction temperatures from –55 °C to +150 °C and has passed humidity, temperature cycling, and HTRB tests - confirming suitability for under-hood and cabin ECU applications.
What is the maximum clamping voltage of the 1.5SMC12AH under surge conditions?
The 1.5SMC12AH has a maximum clamping voltage (VC) of 16.7 V at 94 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value represents the worst-case voltage seen by downstream components during a full-energy transient event and is critical for verifying compatibility with the absolute maximum ratings of protected ICs.
How does the 1.5SMC12AH compare to the 1.5SMC12H variant?
The 1.5SMC12AH has a tighter breakdown voltage tolerance (11.4–12.6 V) versus the 1.5SMC12H (10.8–13.2 V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical package, power rating, and thermal specs - but the 'A' suffix denotes enhanced VBR uniformity for precision protection applications.
Is the 1.5SMC12AH compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC12AH uses matte tin-plated leads compliant with J-STD-002 and is rated for moisture sensitivity level 1 (MSL-1) per J-STD-020 - meaning it can be subjected to standard lead-free reflow profiles (peak 260 °C) without baking or special handling. Its UL 94V-0 molding compound also withstands multiple thermal cycles.
1.5SMC12AH 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 94A
- 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)
1.5SMC12AH FAQ
1.How can I place an order for 1.5SMC12AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AH 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 1.5SMC12AH reliable?
The price and inventory of 1.5SMC12AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AH?
1.5SMC12AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AH 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 1.5SMC12AH?
For technical support, including 1.5SMC12AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AH requirements.
6.How does Aetrix verify that 1.5SMC12AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AH 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 1.5SMC12AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AH?
All 1.5SMC12AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AH, 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 1.5SMC12AH part is unused and in its original packaging.
Return procedure for 1.5SMC12AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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