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Taiwan Semiconductor Corporation 1.5SMC82A
- Part No.:
- 1.5SMC82A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC82A.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,667
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Product details
Overview
1.5SMC82A 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 77.9–86.1 V breakdown voltage (VBR), 70.1 V working stand-off voltage (VWM), 1500 W peak pulse power (PPK), and clamps to ≤113 V at 13.9 A peak impulse current - deployed in telecom power inputs, industrial I/O interfaces, and automotive body control modules.
For engineers reviewing the 1.5SMC82A datasheet, 1.5SMC82A pinout, 1.5SMC82A application, or 1.5SMC82A equivalent, this page delivers verified electrical specs, DO-214AB package details, clamping performance under 10/1000 µs surge, thermal resistance data, and direct alternatives for ESD and lightning-induced transients in 24 V and 48 V systems.
Technical Context
The 1.5SMC82A operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) and low leakage (<1 µA at 70.1 V). Its clamping behavior follows IEEE C62.35 standards, delivering consistent voltage limiting during ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
Thermally, it exhibits RθJA = 50 °C/W and RθJC = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device is rated for 200 A non-repetitive forward surge (IFSM) and maintains stable VBR temperature coefficient of 0.105 %/°C across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 77.9–86.1 V - defines minimum/maximum voltage at which avalanche conduction begins; critical for margining against system overvoltage thresholds |
| VWM | 70.1 V - maximum continuous reverse voltage before significant leakage; sets upper limit for normal operating rail voltage |
| VC @ IPPM = 13.9 A | ≤113 V - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPK | 1500 W - peak pulse power handling per single 1 ms event; defines surge energy absorption capability |
| IR @ VWM | ≤1 µA - reverse leakage at stand-off voltage; ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - maximum junction temperature; supports operation in high-ambient industrial environments without derating |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance; informs PCB copper area and airflow requirements for thermal management |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected line ground or low-side reference; carries full surge current during clamping |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 48 V rail); initiates avalanche conduction when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| Clamping voltage ≤113 V at 13.9 A | Provides tight overvoltage protection margin for 72 V nominal systems (e.g., telecom -48 V with headroom) |
| Response time <1.0 ps | Ensures suppression of ultrafast ESD events before sensitive downstream ICs experience damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive load-dump and inductive switching immunity per OEM requirements |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates need for baking prior to reflow; supports standard SMT assembly without special handling |
Applications
| Industrial PLC I/O Protection | Telecom Power Input Stage |
|---|---|
Use Scenario: 24 V DC input to programmable logic controller digital input module exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on power rail, placed upstream of DC-DC converter and protection ICs. Use Value: Limits transient excursions to ≤113 V, preventing latch-up or burnout in 36 V-rated input regulators and isolators. |
Use Scenario: -48 V backup power feed in central office equipment subjected to lightning-induced common-mode surges on tip/ring lines. IC Role / Device Role / Timing Role: Unidirectional TVS on supply rail, coordinated with gas discharge tube (GDT) front-end for staged protection. Use Value: Absorbs 1500 W surge energy while maintaining clamping below -55 V absolute rating of downstream hot-swap controllers. |
| Automotive Body Control Module | Medical Equipment Power Entry |
Use Scenario: 12 V battery-supplied microcontroller board in door module encountering load dump pulses per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Secondary rail clamp after upstream polymer PTC and LC filter; handles residual overshoot. Use Value: Clamps 35 V load dump spike to ≤113 V within 1 ps, protecting 16 V-rated LDOs and CAN transceivers. |
Use Scenario: AC/DC adapter output stage feeding isolated DC-DC converters in diagnostic imaging subsystems. IC Role / Device Role / Timing Role: Final-stage transient suppressor on secondary-side 24 V output, guarding against transformer ringing and capacitor discharge spikes. Use Value: Delivers <1 µA leakage at 70.1 V, preserving low-noise performance required for analog sensor signal chains. |
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 (Bourns) | Same DO-214AA package; 85 V VBR min (80.8–89.2 V); 600 W PPK; higher VC = 137 V @ 4.4 A | Limited to lower-energy transients; insufficient for ISO 7637-2 Pulse 5a compliance in 12 V systems | Select when space-constrained layout requires smaller SMB package and surge energy is ≤600 W |
| 1.5KE82A (Taiwan Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs; same 1500 W rating; RθJA = 15 °C/W (lower thermal resistance) | Requires through-hole assembly; not suitable for fully SMT production or high-density boards | Choose for legacy designs with existing DO-15 footprints or where enhanced thermal dissipation justifies manual assembly |
Compared with SMBJ85A and 1.5KE82A, the 1.5SMC82A uniquely balances 1500 W surge capacity, DO-214AB SMT compatibility, and 113 V clamping - making it optimal for new industrial and telecom designs requiring automated assembly and robust ISO 7637-2 immunity without through-hole compromises.
Availability
1.5SMC82A is available at Aetrix Electronics and suitable for industrial PLCs, telecom power supplies, automotive body control units, and medical power entry circuits requiring stable component supply and full traceability.
Supply support for 1.5SMC82A 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-Q200 qualified product lines.
The 1.5SMC82A belongs to TSC's SMC-series TVS family, engineered specifically for high-power, surface-mount transient suppression in harsh electromagnetic environments - targeting compliance with ISO 7637-2, IEC 61000-4-2/4/5, and automotive and industrial safety standards.
FAQ
What is the polarity configuration of the 1.5SMC82A?
The 1.5SMC82A is a unidirectional TVS diode, configured with anode and cathode terminals. The cathode is marked by a band on the DO-214AB package body. It conducts only during reverse-bias overvoltage events - ideal for DC rail protection where polarity is fixed. Bidirectional variants require "C" or "CA" suffixes (e.g., 1.5SMC82CA), which are distinct part numbers.
Does the 1.5SMC82A meet automotive transient immunity standards?
Yes, the 1.5SMC82A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles for automotive electrical disturbances. Its 1500 W peak power rating and ≤113 V clamping voltage enable robust protection against load dump, inductive switching, and coupling transients in 12 V and 24 V vehicle networks - confirmed in TSC's official S2207 datasheet.
What is the maximum clamping voltage of the 1.5SMC82A under surge conditions?
The 1.5SMC82A has a maximum clamping voltage (VC) of 113 V at 13.9 A peak impulse current (IPPM) under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and production lot, ensuring predictable overvoltage limiting for downstream 120 V-rated components.
Can the 1.5SMC82A be used in bidirectional signal line protection?
No - the 1.5SMC82A is unidirectional and unsuitable for AC or bidirectional signal lines without external circuitry. For symmetrical transient suppression (e.g., RS-485, USB, or audio lines), use the bidirectional variant 1.5SMC82CA, which provides matched clamping in both polarities and is explicitly characterized for bipolar operation per TSC documentation.
What is the thermal resistance and maximum junction temperature of the 1.5SMC82A?
The 1.5SMC82A has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W and a maximum junction temperature (TJ) of +150 °C. These values assume standard JEDEC 2-layer PCB mounting with 1 in² copper pad. Derating is required above +25 °C ambient per Fig.2 in the datasheet to maintain reliability under sustained surge duty cycles.
1.5SMC82A 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC82A FAQ
1.How can I place an order for 1.5SMC82A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC82A 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 1.5SMC82A reliable?
The price and inventory of 1.5SMC82A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC82A is usually 5 days.
3.What payment methods are accepted for 1.5SMC82A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC82A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC82A?
1.5SMC82A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC82A 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 1.5SMC82A?
For technical support, including 1.5SMC82A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC82A requirements.
6.How does Aetrix verify that 1.5SMC82A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC82A 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 1.5SMC82A meets industry standards.
7.What is the process for return or replacement of 1.5SMC82A?
All 1.5SMC82A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC82A, 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 1.5SMC82A part is unused and in its original packaging.
Return procedure for 1.5SMC82A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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