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Taiwan Semiconductor Corporation 1.5SMC15AH
- Part No.:
- 1.5SMC15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15AH.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,068
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Product details
Overview
1.5SMC15AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 14.3–15.8V breakdown voltage (VBR), and 21.2V maximum clamping voltage (VC) at 74A peak impulse current. It provides ESD and surge protection for DC power rails and signal lines in automotive and industrial control systems.
For engineers reviewing the 1.5SMC15AH datasheet, 1.5SMC15AH pinout, 1.5SMC15AH application, or 1.5SMC15AH equivalent, key selection criteria include working stand-off voltage (12.8V), leakage current (<1µA at VWM), AEC-Q101 qualification, ISO 7637-2 compliance, and thermal resistance (RθJA = 50°C/W).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1.0ps) and low leakage (<1µA above 10V). Its clamping performance is specified at 74A peak impulse current with 21.2V VC, enabling robust protection against load dump and ESD events per IEC 61000-4-2 and ISO 7637-2 Pulse 1/2a/2b/3a/3b.
The device operates across -55°C to +150°C junction temperature range, features JESD201 Class 2 whisker resistance, and meets UL 94V-0 flammability and RoHS/halogen-free requirements. Thermal design is supported by RθJC = 15°C/W and RθJA = 50°C/W ratings under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3V / 15.8V - Ensures reliable turn-on above 12.8V stand-off while avoiding false triggering |
| VWM | 12.8V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 21.2V at 74A - Clamped voltage during 10/1000µs surge limits stress on downstream ICs |
| PPK | 1500W - Peak pulse power handling capability for short-duration transients (e.g., ISO 7637-2 Pulse 5a) |
| IR @ VWM | <1µA - Ultra-low leakage preserves battery life and signal integrity in always-on circuits |
| TJ max | +150°C - Enables use in under-hood automotive environments and high-power industrial enclosures |
| RθJA | 50°C/W - Defines thermal derating slope: power dissipation drops to ~3.25W at 75°C ambient |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional configuration. Cathode indicated by molded band on case. Matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., 12V rail); conducts during reverse-biased surge |
| Cathode | Output/Load side | Connected to ground or low-impedance return path; defines polarity of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | <1.0ps enables suppression before sensitive logic or analog circuitry is damaged |
| Moisture sensitivity level 1 | No bake required prior to reflow; compatible with standard SMT assembly processes |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V supply lines in body control modules (BCM) and infotainment head units from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 12V rail to ≤21.2V during 1500W surges, preventing overvoltage damage to LDOs and microcontrollers without adding series resistance. |
Use Scenario: Safeguarding 4–20mA current-loop sensor inputs in PLC analog input modules from field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across input terminals to shunt transients before they reach op-amp front-end and ADC driver. Use Value: Sub-1µA leakage avoids offset error in precision current measurement; 21.2V clamping protects rail-to-rail input stages rated for ±24V. |
| Telecom DC Power Feeds | Consumer USB-C Power Delivery Lines |
Use Scenario: Guarding -48V DC distribution in telecom base station backplanes against lightning-induced surges on remote power feeds. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; this unidirectional part used only on positive-side feed with proper grounding topology. Use Value: 1500W rating handles multi-kA induced surges; DO-214AB footprint supports high-current PCB traces and thermal relief pads. |
Use Scenario: Secondary-level surge protection on VBUS lines of USB-C receptacles in portable docking stations and monitors. IC Role / Device Role / Timing Role: Placed downstream of primary fuse and upstream of USB PD controller to limit clamped voltage seen by silicon. Use Value: 21.2V clamping ensures PD controller (typically rated to 28V abs max) remains within safe operating area during 8kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Same 15V nominal breakdown but lower 600W PPK; SMB package (smaller footprint, higher RθJA ≈ 65°C/W) | Lower power handling limits use to sub-50A surge environments; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and peak surge energy is ≤600W |
| 1.5KE15A | Through-hole TO-204AA (DO-41); identical 15V VBR and 21.2V VC, but 1500W rating applies only at TA = 25°C with heatsinking | Requires manual or wave soldering; incompatible with automated SMT lines; less suitable for high-vibration automotive mounts | Select only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ15A and 1.5KE15A, the 1.5SMC15AH delivers full 1500W surge capability in an SMT-optimized DO-214AB package with AEC-Q101 validation and lower thermal resistance-making it the preferred choice for production automotive and industrial PCBs requiring automated assembly and high-reliability surge immunity.
Availability
1.5SMC15AH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for 1.5SMC15AH 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 1.5SMCxxAH series was designed specifically for high-reliability surface-mount surge protection in automotive and industrial environments, emphasizing low leakage, fast response, and robust thermal performance in the DO-214AB package.
FAQ
What is the maximum clamping voltage of the 1.5SMC15AH under standard test conditions?
The 1.5SMC15AH has a maximum clamping voltage (VC) of 21.2V at 74A peak impulse current (IPPM) with a 10/1000µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 21.2V during a defined surge event, provided layout minimizes parasitic inductance.
Is the 1.5SMC15AH suitable for bidirectional transient protection?
No, the 1.5SMC15AH is a unidirectional TVS diode intended for DC line protection where polarity is fixed. For bidirectional applications (e.g., AC lines or data buses), select the 1.5SMC15CAH variant, which features symmetrical breakdown in both directions and uses CH or CAH suffix per TSC's ordering convention.
Does the 1.5SMC15AH meet automotive qualification standards?
Yes, the 1.5SMC15AH is AEC-Q101 qualified and tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. It is rated for operation from -55°C to +150°C and manufactured in TSC's IATF 16949-certified facilities, making it suitable for under-hood and chassis-mounted automotive ECUs.
What is the working stand-off voltage (VWM) of the 1.5SMC15AH, and why does it matter?
The 1.5SMC15AH has a working stand-off voltage (VWM) of 12.8V, meaning it remains non-conductive up to this DC or RMS voltage. This margin (12.8V vs. typical 12V nominal systems) prevents leakage or false triggering during normal operation while allowing headroom for ripple and tolerance drift before clamping initiates.
How does the thermal performance of the 1.5SMC15AH affect PCB layout?
The 1.5SMC15AH has RθJA = 50°C/W and RθJC = 15°C/W. To maintain TJ ≤150°C at full 1500W surge, PCB copper area must be optimized: minimum 100mm² of 2oz copper per pad with thermal vias to inner ground planes is recommended. Layout directly impacts sustained surge capability and long-term reliability.
1.5SMC15AH 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 74A
- 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)
1.5SMC15AH FAQ
1.How can I place an order for 1.5SMC15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15AH 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 1.5SMC15AH reliable?
The price and inventory of 1.5SMC15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15AH?
1.5SMC15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15AH 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 1.5SMC15AH?
For technical support, including 1.5SMC15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15AH requirements.
6.How does Aetrix verify that 1.5SMC15AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15AH 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 1.5SMC15AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC15AH?
All 1.5SMC15AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15AH, 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 1.5SMC15AH part is unused and in its original packaging.
Return procedure for 1.5SMC15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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