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Taiwan Semiconductor Corporation 1.5SMC8.2A
- Part No.:
- 1.5SMC8.2A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC8.2A.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,989
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Product details
Overview
1.5SMC8.2A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 7.79–8.61 V breakdown voltage (VBR), 7.02 V working stand-off voltage (VWM), 130 A peak impulse current (IPPM), and clamps to ≤12.1 V at rated surge, making it suitable for protecting USB ports, Ethernet PHYs, and industrial sensor interfaces against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC8.2A datasheet, 1.5SMC8.2A pinout, 1.5SMC8.2A application, or 1.5SMC8.2A equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, unidirectional polarity marking, 1500 W peak pulse power rating, low leakage (<1 µA @ 7.02 V), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds its VBR threshold. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across temperature, while the DO-214AB package provides thermal resistance of RθJA = 50 °C/W and RθJC = 15 °C/W for reliable power dissipation under repetitive surges.
The 1.5SMC8.2A is optimized for fast response (<1.0 ps), enabling suppression of sub-nanosecond ESD events per IEC 61000-4-2 Level 4 (15 kV air / 8 kV contact). Its bidirectional counterpart is not applicable - this part is strictly unidirectional, with cathode band marking and forward voltage drop of 3.5 V @ 50 A, consistent with the 1.5SMC6.8–1.5SMC91 family subset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.79 V / 8.61 V - defines precise avalanche onset range for repeatable clamping behavior at 10 mA test current |
| VWM | 7.02 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | ≤12.1 V - clamping voltage during 130 A 10/1000 µs surge, limiting downstream voltage stress |
| IPPM | 130 A - peak surge current capability under standard 10/1000 µs waveform, supporting high-energy transients |
| PPK | 1500 W - peak pulse power rating at TA = 25°C, derated linearly above ambient per Fig.2 |
| IR @ VWM | <1 µA - ultra-low reverse leakage ensures minimal power loss and signal integrity in standby operation |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive or industrial enclosures |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity indicated by cathode band on one end; unidirectional configuration only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients |
| Cathode | High-side protected line terminal | Connected to protected line (e.g., VBUS, RS-485 A); conducts avalanche current when line voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Enables effective suppression of nanosecond-scale ESD events before sensitive ICs experience overstress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validates suitability for 12 V automotive electronics including infotainment and body control modules |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates need for dry-pack handling or bake-out prior to reflow, reducing manufacturing overhead |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for consumer, industrial, and automotive end equipment |
Applications
| USB 2.0 Data Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 peripherals against ESD events during hot-plug insertion and cable discharge. IC Role / Device Role: Unidirectional shunt clamp placed between each data line and ground, with VWM = 7.02 V ensuring no interference with 3.3 V logic levels. Use Value: Clamps transients to ≤12.1 V within <1.0 ps, preventing latch-up or gate oxide damage in USB transceivers such as TUSB2036 or USB3300. |
Use Scenario: Safeguarding 4–20 mA current-loop analog inputs in PLC I/O modules exposed to field wiring surges and inductive kickback. IC Role / Device Role: Primary overvoltage clamp on the loop supply rail (typically 24 V), placed upstream of precision current-sense resistors and op-amps. Use Value: Withstands 130 A surge current and clamps to ≤12.1 V, preserving accuracy of 16-bit ADCs like ADS1115 and avoiding saturation of instrumentation amplifiers. |
| Automotive LIN Bus Node | DC Power Input Stage (12 V) |
Use Scenario: Transient protection for LIN transceiver ICs (e.g., TLE7259-3GE) in door modules and seat controllers subjected to battery load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS connected between LIN bus line and chassis ground, leveraging VWM = 7.02 V to remain inactive during normal 12 V ±10% operation. Use Value: Meets ISO 7637-2 Pulse 2b (inductive switch-off) and Pulse 5a (load dump), limiting bus voltage excursion to safe levels for LIN physical layer compliance. |
Use Scenario: Front-end surge suppression on 12 V DC input of embedded controllers in HVAC systems, vending machines, and point-of-sale terminals. IC Role / Device Role: First-line defense against indirect lightning surges and AC/DC adapter faults, placed immediately after input connector before bulk capacitance and LDO regulators. Use Value: 1500 W peak power rating and 130 A IPPM enable robust handling of 10/1000 µs transients up to 1.5 kV, extending system MTBF in harsh electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VBR = 8.89–9.83 V; VC = 12.7 V @ 47.2 A | Lower surge capacity limits use to low-energy interfaces (e.g., GPIO, I²C); unsuitable for 12 V power rail protection | Select when board space constraints require smaller SMB footprint and surge energy is ≤600 W |
| 1.5KE8.2A (Taiwan Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but higher VF = 3.5 V; same 1500 W rating | Requires wave soldering or hand assembly; incompatible with fully SMT production; better thermal mass but larger PCB area | Choose for legacy through-hole designs or where enhanced thermal inertia improves reliability in high-temperature ambient |
Compared with SMBJ8.0A and 1.5KE8.2A, the 1.5SMC8.2A delivers optimal balance of high surge capacity (1500 W), compact DO-214AB footprint, and precise 7.79–8.61 V breakdown for 12 V system protection - making it the preferred choice for modern SMT-based automotive and industrial power rail designs.
Availability
1.5SMC8.2A is available at Aetrix Electronics and suitable for USB interface protection, industrial 4–20 mA sensor inputs, automotive LIN bus nodes, and 12 V DC power input stages requiring stable component supply and full traceability.
Supply support for 1.5SMC8.2A 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 ISO/TS 16949-certified production facilities.
The 1.5SMC series was developed specifically for high-reliability surface-mount transient suppression in automotive, industrial, and telecom infrastructure - emphasizing low leakage, tight VBR tolerance, and AEC-Q101 readiness.
FAQ
What is the polarity configuration of the 1.5SMC8.2A?
The 1.5SMC8.2A is a unidirectional TVS diode, with polarity marked by a cathode band on the DO-214AB package. It conducts only when the cathode is at a higher potential than the anode - making it suitable for DC rail protection where polarity is fixed. Bidirectional variants require "C" or "CA" suffixes (e.g., 1.5SMC8.2CA), which the 1.5SMC8.2A does not have.
Does the 1.5SMC8.2A meet automotive transient immunity standards?
Yes, the 1.5SMC8.2A meets ISO 7637-2 Pulse 1 (capacitive coupled), Pulse 2a (battery disconnect), Pulse 2b (inductive switch-off), Pulse 3a (ignition noise), and Pulse 3b (capacitive discharge), as confirmed in the official Taiwan Semiconductor datasheet Version S2207. This validates its use in automotive body electronics and infotainment systems.
What is the maximum clamping voltage of the 1.5SMC8.2A under surge conditions?
The 1.5SMC8.2A has a maximum clamping voltage (VC) of 12.1 V when subjected to its rated peak pulse current of 130 A using the standard 10/1000 µs waveform. This value is measured at TA = 25°C and guarantees that protected circuitry sees no more than 12.1 V during worst-case transient events.
Can the 1.5SMC8.2A be used in bidirectional signal lines like RS-485?
No - the 1.5SMC8.2A is unidirectional only and must not be used on AC or bidirectional signal lines without external circuitry. For RS-485 or CAN bus protection, a bidirectional variant such as 1.5SMC8.2CA (not the 1.5SMC8.2A) is required, as it clamps symmetrically in both polarities. Using 1.5SMC8.2A on such lines risks forward conduction and signal distortion.
What is the thermal resistance profile of the 1.5SMC8.2A in typical PCB layout?
The 1.5SMC8.2A has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W and junction-to-case (RθJC) of 15 °C/W, measured on standard FR-4 with 1-inch² copper pads per lead. These values assume recommended pad layout per Taiwan Semiconductor's DO-214AB outline drawing - reduced copper area increases RθJA and risks thermal runaway during repetitive surges.
1.5SMC8.2A 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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 130A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC8.2A FAQ
1.How can I place an order for 1.5SMC8.2A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC8.2A 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 1.5SMC8.2A reliable?
The price and inventory of 1.5SMC8.2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC8.2A is usually 5 days.
3.What payment methods are accepted for 1.5SMC8.2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC8.2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC8.2A?
1.5SMC8.2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC8.2A 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 1.5SMC8.2A?
For technical support, including 1.5SMC8.2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC8.2A requirements.
6.How does Aetrix verify that 1.5SMC8.2A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC8.2A 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 1.5SMC8.2A meets industry standards.
7.What is the process for return or replacement of 1.5SMC8.2A?
All 1.5SMC8.2A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC8.2A, 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 1.5SMC8.2A part is unused and in its original packaging.
Return procedure for 1.5SMC8.2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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