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Taiwan Semiconductor Corporation 1.5SMC12H
- Part No.:
- 1.5SMC12H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12H.pdf
- Description:
- 1500W, 12V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,184
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Product details
Overview
1.5SMC12H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 12V nominal breakdown voltage (10.8–13.2V), and clamping voltage of 17.3V at 91A peak impulse current. It protects automotive and industrial DC power rails against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the 1.5SMC12H datasheet, 1.5SMC12H pinout, 1.5SMC12H application, or 1.5SMC12H equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA leakage above 10V, and moisture sensitivity level 1 - critical for high-reliability automotive PCB assembly and under-hood power electronics.
Technical Context
The 1.5SMC12H operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its 10.8–13.2V breakdown range ensures reliable turn-on during fast-rising transients while maintaining low leakage (<1μA at 9.72V working stand-off).
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained operation up to TJ = +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for SMT reflow compatibility and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 10.8V to 13.2V - defines guaranteed avalanche conduction onset window for robust overvoltage detection across temperature and unit variation |
| VWM | 9.72V - maximum continuous reverse operating voltage; ensures no conduction during normal 12V rail operation |
| VC@IPPM | 17.3V at 91A - clamping voltage limits downstream component stress during worst-case 10/1000μs surge events |
| PPK | 1500W - peak pulse power rating per 1ms waveform (Fig.5), enabling protection against ISO 7637-2 Pulse 1 (inductive load dump) |
| IR@VWM | <1μA - ultra-low leakage preserves battery life and avoids false triggering in always-on circuits |
| TJ max | +150°C - junction temperature limit supports under-hood automotive placement without derating penalties |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and matte tin-plated leads for J-STD-002 solderability |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; terminals are anode and cathode; polarity is marked on body; leads are matte tin plated and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 12V rail); conducts surge current to ground when VIN exceeds VBR |
| Anode | Reference node | Connected to system ground; completes clamping path; must be low-inductance for effective transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC stress test plan |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump coupling), and Pulse 3a/3b (capacitive discharge) waveforms without degradation |
| Sub-1ps response time | Enables clamping before sensitive logic or analog circuitry experiences damaging overvoltage - critical for CAN/LIN bus protection |
| Glass-passivated junction | Provides stable VBR tolerance and low leakage over lifetime, even under thermal cycling and humidity exposure |
| Moisture sensitivity level 1 | Zero floor life limitation; no baking required prior to reflow - reduces manufacturing cost and process risk |
Applications
| Automotive Power Rail Protection | Industrial DC Input Stage |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs (e.g., body control modules) from load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and upstream fuse; clamps >100V spikes to ≤17.3V within picoseconds. Use Value: Prevents latch-up or permanent damage to PMICs and microcontrollers by limiting transient energy delivered to downstream silicon. | Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 24V industrial supplies exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp at DIN-rail power entry point; coordinated with upstream MOVs and downstream LC filters. Use Value: Maintains system uptime by absorbing repetitive 1500W surges without parameter drift or catastrophic failure. |
| Telecom DC Feeds | Consumer USB-C Power Delivery |
Use Scenario: Shielding PoE-powered switches and base stations from induced lightning surges on outdoor Ethernet cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on 48V DC input stage; works with common-mode chokes and primary GDTs. Use Value: Ensures immunity to IEC 61000-4-5 Level 4 (4kV line-earth) surges while preserving low standby leakage. | Use Scenario: Protecting USB-C port controller ICs and buck converters from hot-plug ESD and VBUS overvoltage during adapter swaps. IC Role / Device Role / Timing Role: Fast-response clamping element on VBUS line; placed immediately after connector to minimize trace inductance. Use Value: Limits VBUS excursion to 17.3V during ±15kV contact ESD (IEC 61000-4-2), preventing gate oxide rupture in power FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600W rating, DO-214AA (SMB) package, lower PPK, same VBR range (11.4–12.6V) | Not AEC-Q101 qualified; lacks ISO 7637-2 Pulse 1/2a/2b/3a/3b validation | Select SMBJ12A only for cost-sensitive consumer applications where full automotive surge immunity is not required. |
| 1.5KE12A | Through-hole TO-204AA (DO-41) package, 1500W rating, higher VC (20.1V), slower response (~1ns) | Requires manual insertion or wave soldering; incompatible with automated SMT lines | Choose 1.5KE12A only for legacy through-hole designs or prototyping where board real estate is unconstrained. |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12H uniquely combines AEC-Q101 qualification, ISO 7637-2 compliance, SMT scalability, and 17.3V clamping - making it the only option suitable for production automotive ECUs requiring zero-layout change and full standard coverage.
Availability
1.5SMC12H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power interfaces, and USB-C power delivery systems requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC12H 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 for automotive, industrial, and computing markets.
The 1.5SMC12H belongs to TSC's AEC-Q101-qualified SMC-family TVS portfolio, engineered specifically for high-energy transient suppression in 12V/24V automotive and industrial power distribution networks.
FAQ
What is the maximum clamping voltage of the 1.5SMC12H under peak impulse conditions?
The 1.5SMC12H has a maximum clamping voltage (VC) of 17.3V at 91A peak impulse current (IPPM) per the 10/1000μs waveform defined in Fig.5. This value is measured at TA = 25°C and guarantees that downstream components see no more than 17.3V during standardized surge events, enabling robust design margin for 12V-system ICs.
Is the 1.5SMC12H suitable for bidirectional transient suppression?
No, the 1.5SMC12H is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications such as AC lines or differential data buses, use the 1.5SMC12AH variant (marked DTJ), which provides symmetrical clamping in both directions and shares identical VBR, VC, and PPK ratings.
Does the 1.5SMC12H meet automotive qualification standards?
Yes, the 1.5SMC12H is AEC-Q101 qualified and validated for automotive use. It also meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (supply interruption), and Pulse 3a/3b (capacitive discharge), making it suitable for engine control units, body electronics, and ADAS power domains.
What is the working stand-off voltage (VWM) of the 1.5SMC12H, and why does it matter?
The 1.5SMC12H has a working stand-off voltage (VWM) of 9.72V, meaning it remains non-conductive under normal 12V rail operation with margin. This ensures zero power loss and no interference with system functionality while still triggering reliably during overvoltage events - a critical balance for always-on automotive modules.
How does the DO-214AB (SMC) package of the 1.5SMC12H compare to DO-214AA (SMB) in thermal performance?
The DO-214AB (SMC) package of the 1.5SMC12H offers superior thermal dissipation versus DO-214AA (SMB): RθJA = 50°C/W vs. ~65°C/W typical for SMB, and RθJC = 15°C/W enables more efficient heat transfer to copper planes. This allows the 1.5SMC12H to sustain higher surge repetition rates in compact automotive layouts without exceeding TJ = +150°C.
1.5SMC12H 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):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 91A
- 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)
1.5SMC12H FAQ
1.How can I place an order for 1.5SMC12H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12H 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 1.5SMC12H reliable?
The price and inventory of 1.5SMC12H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12H is usually 5 days.
3.What payment methods are accepted for 1.5SMC12H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12H?
1.5SMC12H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12H 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 1.5SMC12H?
For technical support, including 1.5SMC12H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12H requirements.
6.How does Aetrix verify that 1.5SMC12H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12H 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 1.5SMC12H meets industry standards.
7.What is the process for return or replacement of 1.5SMC12H?
All 1.5SMC12H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12H, 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 1.5SMC12H part is unused and in its original packaging.
Return procedure for 1.5SMC12H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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