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Taiwan Semiconductor Corporation 1.5SMC12CAH
- Part No.:
- 1.5SMC12CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12CAH.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,416
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Product details
Overview
1.5SMC12CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 12V working stand-off voltage (VWM = 10.2 V), 11.4–12.6 V breakdown voltage (VBR), and 16.7 V clamping voltage (VC) at 94 A peak impulse current. It protects automotive and industrial power rails against ESD, lightning-induced surges, and load-switching transients.
For engineers reviewing the 1.5SMC12CAH datasheet, 1.5SMC12CAH pinout, 1.5SMC12CAH application, or 1.5SMC12CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AB package thermal performance (RθJA = 50 °C/W), and sub-1 ps response time.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to deliver symmetrical clamping in both polarities, enabling robust protection of AC-coupled or floating signal/power lines without polarity sensitivity. Its 1500 W peak pulse power rating (10/1000 µs waveform) and 16.7 V clamping voltage at 94 A ensure low-voltage rail integrity during high-energy transients.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing and ISO 7637-2 immunity requirements for vehicle electrical systems. The DO-214AB (SMC) package supports automated placement and provides 15 °C/W junction-to-case thermal resistance for sustained surge handling under board-level thermal constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC/AC bias margin for protected line |
| VBR (min/max) | 11.4 V / 12.6 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across temperature and lot |
| VC @ IPPM | 16.7 V @ 94 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤16.7 V under worst-case 1500 W transient |
| PPK | 1500 W - Peak pulse power handling per single 10/1000 µs event; enables protection against ISO 7637-2 Pulse 5a (load dump) |
| IR @ VWM | <1 µA - Ultra-low leakage at rated stand-off voltage; avoids parasitic loading on sensitive analog or low-power circuits |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments |
| Response time | <1.0 ps - Sub-picosecond junction response ensures clamping activation before transient energy couples into protected circuitry |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge conduction path | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity - enables placement flexibility on AC or floating nodes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units, body controllers, and infotainment power supplies |
| ISO 7637-2 compliant (Pulse 1/2a/2b/3a/3b) | Guarantees immunity to common vehicle electrical disturbances without external filtering or derating |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives; critical for high-humidity under-hood deployment |
| DO-214AB thermal performance | RθJC = 15 °C/W enables efficient heat transfer to PCB copper; supports repeated surge events in thermally constrained layouts |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; simplifies SMT assembly and reduces manufacturing cost and risk |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed at power entry point to shunt surge energy to ground before reaching DC-DC converters or microcontrollers. Use Value: Limits voltage excursion to ≤16.7 V during 1500 W pulses, preserving 24 V tolerant input stages and eliminating need for upstream series impedance. |
Use Scenario: Safeguarding 24 V digital input modules in factory automation against inductive switching spikes from solenoids and contactors. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on field-side signal lines to prevent latch-up or damage to optocoupler inputs. Use Value: Sub-1 ps response ensures clamping initiates before transient propagates through isolation barrier, maintaining functional safety integrity. |
| Telecom Line Interface | Consumer USB Power Rail |
Use Scenario: Shielding RS-485 transceivers connected to outdoor cabling from lightning-induced surges. IC Role / Device Role / Timing Role: Symmetrical TVS placed across differential pair (A/B) and to ground to suppress common-mode and differential-mode transients. Use Value: 16.7 V clamping prevents transceiver output stage saturation while maintaining signal integrity up to 20 Mbps. |
Use Scenario: Guarding VBUS line in USB-C PD adapters against hot-plug transients and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage suppression element between input connector and buck converter controller. Use Value: 10.2 V VWM allows compatibility with 9–15 V adapter outputs; 1 µA leakage avoids standby current penalty in energy-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Lower PPK (600 W), same DO-214AA package, VBR = 13.3–14.7 V, VC = 19.9 V @ 30 A | Insufficient for ISO 7637-2 Pulse 5a; suitable only for lower-energy ESD/lightning zones | Select when board space is constrained and surge energy is limited to ≤600 W |
| 1.5KE12CA | Through-hole DO-15 package, same 12 V rating, PPK = 1500 W, but RθJA ≈ 60 °C/W and no AEC-Q101 qualification | Lacks automotive qualification and SMT compatibility; requires wave-solder or hand-solder process | Choose only for legacy through-hole designs where requalification is impractical |
Compared with SMBJ12CA and 1.5KE12CA, the 1.5SMC12CAH uniquely combines AEC-Q101 qualification, 1500 W SMT capability, and 16.7 V clamping in DO-214AB - making it the only drop-in solution for new automotive and industrial designs requiring full ISO 7637-2 compliance without layout or qualification compromise.
Availability
1.5SMC12CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom line interface, and consumer USB power rail applications requiring stable component supply, AEC-Q101 assurance, and ISO 7637-2 compliance.
Supply support for 1.5SMC12CAH 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, with global distribution and AEC-Q101-compliant production lines.
The 1.5SMCxxCAH series was developed specifically for automotive and harsh-environment industrial applications demanding high-reliability, high-power transient suppression in compact SMT packages - emphasizing thermal robustness, fast response, and standardized qualification.
FAQ
What does the "CAH" suffix indicate in 1.5SMC12CAH?
The "CAH" suffix denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional "H" variants, 1.5SMC12CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled interfaces or floating power domains. This makes 1.5SMC12CAH distinct from unidirectional versions like 1.5SMC12H, which require correct polarity orientation during placement.
Is 1.5SMC12CAH compatible with lead-free reflow processes?
Yes, 1.5SMC12CAH is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020 Level 1), with a moisture sensitivity level (MSL) of 1 - meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. Its matte tin-plated leads meet J-STD-002 solderability requirements, ensuring reliable wetting and joint formation in Pb-free SAC305 or similar alloys.
How does the clamping voltage of 1.5SMC12CAH compare to its working voltage?
The 1.5SMC12CAH has a working stand-off voltage (VWM) of 10.2 V and a maximum clamping voltage (VC) of 16.7 V at 94 A. This 6.5 V headroom ensures that normal 12 V system operation remains well below breakdown, while still limiting transient overvoltage to a safe margin for downstream 16 V-rated components - a critical design balance for automotive 12 V rail protection.
Can 1.5SMC12CAH be used in place of a unidirectional TVS like 1.5SMC12H?
1.5SMC12CAH may replace 1.5SMC12H only if bidirectional clamping is acceptable and required - for example, on differential lines or floating grounds. However, it cannot substitute in circuits relying on forward conduction (e.g., DC power rail with polarity-sensitive crowbar), since 1.5SMC12CAH lacks a defined anode/cathode. Always verify system polarity behavior before substituting 1.5SMC12CAH for unidirectional variants.
Does 1.5SMC12CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
1.5SMC12CAH is rated for 1500 W peak pulse power (10/1000 µs), which covers ISO 7637-2 Pulse 5a up to ~30 V test levels when combined with appropriate series impedance. While not certified standalone for Pulse 5a, its parameters - including 16.7 V clamping and AEC-Q101 qualification - make it a validated component in TSC-recommended load dump protection networks used by Tier 1 automotive suppliers deploying 1.5SMC12CAH.
1.5SMC12CAH 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):
- 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)
1.5SMC12CAH FAQ
1.How can I place an order for 1.5SMC12CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12CAH 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 1.5SMC12CAH reliable?
The price and inventory of 1.5SMC12CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC12CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12CAH?
1.5SMC12CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12CAH 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 1.5SMC12CAH?
For technical support, including 1.5SMC12CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12CAH requirements.
6.How does Aetrix verify that 1.5SMC12CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12CAH 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 1.5SMC12CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC12CAH?
All 1.5SMC12CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12CAH, 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 1.5SMC12CAH part is unused and in its original packaging.
Return procedure for 1.5SMC12CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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