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Taiwan Semiconductor Corporation 1.5SMC82AH
- Part No.:
- 1.5SMC82AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC82AH.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,838
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Product details
Overview
1.5SMC82AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 77.9–86.1 V breakdown voltage (VBR), 70.1 V working stand-off voltage (VWM), 1500 W peak pulse power (PPK), and clamps transients to ≤113 V at 13.9 A peak impulse current - deployed in automotive infotainment power rails and industrial I/O modules.
For engineers reviewing the 1.5SMC82AH datasheet, 1.5SMC82AH pinout, 1.5SMC82AH application, or 1.5SMC82AH equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive ECU front-end protection.
Technical Context
The 1.5SMC82AH uses a glass-passivated silicon junction optimized for fast response (<1.0 ps) and low capacitance, enabling effective suppression of ESD and lightning-induced surges without distorting high-speed signals. Its unidirectional configuration provides asymmetric clamping - forward conduction only during reverse overvoltage events - making it suitable for DC-biased lines where polarity is fixed.
Thermally, it delivers RθJA = 50°C/W and RθJC = 15°C/W in the DO-214AB (SMC) package, supporting sustained operation up to TJ = +150°C. The device meets AEC-Q101 stress testing and JESD201 Class 2 whisker resistance, confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 77.9–86.1 V - ensures reliable turn-on before downstream ICs exceed absolute maximum ratings |
| VWM | 70.1 V - sets maximum continuous DC operating voltage without significant leakage |
| VC @ IPPM = 13.9 A | ≤113 V - defines worst-case clamped voltage during 10/1000 µs surge, critical for safe margin over 75 V rail |
| IR @ VWM | ≤1 µA - guarantees negligible standby power loss and no interference with high-impedance sensing circuits |
| PPK | 1500 W - supports single-event surge immunity per ISO 7637-2 Pulse 3b (50 V/2 Ω, 100 ns rise) |
| TJ max | +150 °C - enables placement near heat-generating components in engine control units |
| Package | DO-214AB (SMC) - industry-standard SMT footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; two-terminal device with polarity-sensitive orientation. Matte tin-plated leads meet J-STD-002 solderability requirements and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return / ground reference | Connected to system ground or low-side return path; must be low-inductance for effective clamping |
| Cathode | Protected line input | Connected to the line being protected (e.g., 72 V battery feed); marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - required for ECU and ADAS module qualification |
| Clamping voltage ≤113 V | Provides ≥12 V margin below typical 125 V load-dump peak, preventing damage to 80 V-rated MOSFETs and gate drivers |
| Response time <1.0 ps | Engages before ESD pulses (IEC 61000-4-2) propagate into sensitive analog front-ends or CAN transceivers |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and PCB handling risk |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU - mandatory for global OEM supply chains |
Applications
| Automotive Power Rail Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: 72 V battery-fed infotainment head unit exposed to ISO 7637-2 Pulse 3b (50 V transient) during ignition switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input capacitor. Use Value: Clamps 13.9 A surge to ≤113 V within <1 ps, preserving 80 V input rating of buck controller and avoiding brownout resets. |
Use Scenario: 24 V analog input channel on modular PLC subjected to field-wiring ESD (±8 kV contact discharge). IC Role / Device Role / Timing Role: Primary surge clamp at terminal block entry, upstream of precision op-amp signal conditioning. Use Value: Sub-µA leakage at 24 V ensures <0.1% gain error in 100 kΩ input impedance circuits; fast response prevents op-amp saturation. |
| Telecom DC Feeder Protection | Renewable Energy Charge Controller Interface |
Use Scenario: -48 V telecom rectifier output feeding remote radio units, vulnerable to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail, referenced to chassis ground with low-inductance layout. Use Value: 1500 W peak power rating handles 10/1000 µs surges up to 13.9 A without degradation; UL 94V-0 molding compound resists flame propagation. |
Use Scenario: 60–100 V PV string input to solar charge controller experiencing rapid voltage transients during cloud-edge events. IC Role / Device Role / Timing Role: First-line protection on MPPT input stage, coordinated with MOV and fuse. Use Value: 70.1 V VWM allows full utilization of 100 V input range while clamping >100 V spikes to safe levels for SiC MOSFET gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | Lower PPK (600 W), higher VC (137 V @ 4.4 A), SMB package (smaller thermal mass) | Insufficient for ISO 7637-2 Pulse 1 (350 W, 100 ms) in automotive; limited to lower-energy telecom surges | Select only if system-level surge energy is confirmed ≤600 W and layout allows tighter thermal management. |
| 1.5KE82A | Through-hole TO-204AA (DO-41), same VBR/VC specs but slower response (~1 ns), no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive vibration environments; requires manual insertion and wave soldering | Use only for legacy through-hole designs or non-automotive industrial prototypes where rework tolerance is acceptable. |
Compared with SMBJ85A and 1.5KE82A, the 1.5SMC82AH uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC package thermal performance - making it the only option qualified for production automotive power rail protection requiring both high energy handling and automated assembly.
Availability
1.5SMC82AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC analog inputs, telecom DC feeder systems, and renewable energy charge controllers requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC82AH 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, and rectifiers with global distribution and AEC-Q101-compliant production lines.
The 1.5SMCxxAH series was engineered specifically for high-reliability automotive and industrial DC power line protection, emphasizing low clamping voltage, fast response, and robust thermal performance in surface-mount packages.
FAQ
What is the maximum clamping voltage of the 1.5SMC82AH under standard test conditions?
The 1.5SMC82AH has a maximum clamping voltage (VC) of 113 V when subjected to a 10/1000 µs waveform peak impulse current (IPPM) of 13.9 A at TA = 25°C. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on the protected circuit during surge events - critical for ensuring compatibility with 125 V-rated downstream components in automotive applications.
Is the 1.5SMC82AH suitable for bidirectional transient suppression?
No, the 1.5SMC82AH is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the line being protected, anode to ground. For bidirectional protection, Taiwan Semiconductor specifies the 1.5SMC82CAH variant (with CAH suffix), which provides symmetrical clamping in both directions and is rated for ±82 V breakdown.
Does the 1.5SMC82AH require derating at elevated ambient temperatures?
Yes, the 1.5SMC82AH must be derated above TA = 25°C per Figure 2 in the datasheet. At 85°C ambient, its peak pulse power drops to approximately 900 W (60% of 1500 W), and at 125°C, it falls to ~450 W. Designers must verify that worst-case surge energy remains within the derated PPK envelope for the intended operating environment.
What is the leakage current specification for the 1.5SMC82AH at its working stand-off voltage?
The 1.5SMC82AH exhibits a maximum blocking leakage current (IR) of 1 µA when biased at its rated working stand-off voltage of 70.1 V. This ultra-low leakage ensures minimal impact on high-impedance circuits such as sensor bias networks or battery monitoring dividers, and supports long-term reliability in always-on automotive modules.
How does the 1.5SMC82AH comply with automotive electromagnetic compatibility standards?
The 1.5SMC82AH meets ISO 7637-2 test requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), verified through AEC-Q101 qualification. Its sub-1 ps response time and controlled clamping behavior enable robust immunity in 12 V/24 V/48 V vehicle networks without additional filtering components.
1.5SMC82AH 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.9A
- 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)
1.5SMC82AH FAQ
1.How can I place an order for 1.5SMC82AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC82AH 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 1.5SMC82AH reliable?
The price and inventory of 1.5SMC82AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC82AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC82AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC82AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC82AH?
1.5SMC82AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC82AH 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 1.5SMC82AH?
For technical support, including 1.5SMC82AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC82AH requirements.
6.How does Aetrix verify that 1.5SMC82AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC82AH 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 1.5SMC82AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC82AH?
All 1.5SMC82AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC82AH, 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 1.5SMC82AH part is unused and in its original packaging.
Return procedure for 1.5SMC82AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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