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Taiwan Semiconductor Corporation 1.5SMC180A
- Part No.:
- 1.5SMC180A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC180A.pdf
- Description:
- 1500W, 180V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,879
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Product details
Overview
1.5SMC180A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 1500W peak pulse power rating, 171V to 189V breakdown voltage (VBR), 154V working stand-off voltage (VWM), and clamps transients to ≤246V at 6.4A peak impulse current - deployed in telecom power supplies, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC180A datasheet, 1.5SMC180A pinout, 1.5SMC180A application, or 1.5SMC180A equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, unidirectional polarity marking, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal performance with RθJA = 50°C/W - critical for high-reliability surge suppression in constrained PCB layouts.
Technical Context
The 1.5SMC180A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior and low leakage (<1µA at 154V). Its fast response time (<1.0ps) enables effective suppression of ESD and lightning-induced transients before sensitive downstream circuitry is damaged.
Designed for single-die configuration in DO-214AB packaging, it supports steady-state power dissipation up to 6.5W at 25°C and handles 200A non-repetitive forward surge current (8.3ms half-sine), with junction temperature rated from –55°C to +150°C - suitable for harsh-environment industrial and automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 171V / 189V - defines minimum and maximum guaranteed avalanche initiation voltage at 1mA test current; ensures consistent clamping threshold across production lots |
| VWM | 154V - maximum continuous reverse operating voltage; sets safe DC bias margin before leakage rises significantly |
| VC @ IPPM | ≤246V at 6.4A - clamping voltage during 10/1000μs surge; determines maximum stress imposed on protected ICs or MOSFETs |
| PPK | 1500W - peak pulse power handling per IEEE C62.35; validates capability against IEC 61000-4-5 Level 4 surges |
| IR @ VWM | <1µA - ultra-low reverse leakage at rated stand-off voltage; minimizes standby power loss in battery-backed systems |
| TJ max | +150°C - maximum junction temperature; enables operation in high-ambient environments without derating below full power |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs heatsinking requirements when mounted on standard FR-4 with 1in² copper pour |
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 and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during positive transients when cathode is biased higher |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); initiates breakdown when voltage exceeds VBR, shunting surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime cycling |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and supply-transient immunity without external filtering components |
| Moisture sensitivity level 1 (J-STD-020) | Enables direct placement without baking or dry-pack handling - reduces manufacturing overhead and risk of popcorning |
| RoHS and halogen-free (IEC 61249-2-21) | Meets global environmental compliance mandates for industrial and consumer end equipment without sacrificing surge performance |
| Fast response time <1.0ps | Responds before most microsecond-scale transients fully develop - protects high-speed interfaces like CAN FD or RS-485 |
Applications
| Automotive Power Distribution | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protection of 12V/24V power inputs in body control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges above 154V. Use Value: Limits peak voltage to ≤246V during 10/1000μs pulses, preventing damage to upstream DC-DC controllers and MCU power supplies. |
Use Scenario: Shielding 24V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, referenced to common I/O ground plane. Use Value: Withstands repetitive 1kV/500A transients per IEC 61000-4-5 while maintaining <1µA leakage at 24V nominal operation. |
| Telecom DC Power Feeds | Medical Equipment Auxiliary Rails |
Use Scenario: Safeguarding -48V DC power inputs in base station remote radio units exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5SMC180A used with polarity-reversed mounting for negative-rail clamping. Use Value: Clamps negative surges to ≤246V magnitude while supporting continuous -48V operation with negligible leakage impact on monitoring circuits. |
Use Scenario: Overvoltage hardening of isolated 15V auxiliary rails powering analog front-end sensors in diagnostic imaging systems. IC Role / Device Role / Timing Role: Secondary-level protection downstream of primary DC-DC converters, placed adjacent to LDO inputs. Use Value: Provides 1500W surge margin without derating at +70°C ambient, meeting IEC 60601-1 creepage/clearance and reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180A (Bourns) | Same DO-214AA package; 1500W rating; VBR = 182–201V; VC = 259V @ 5.8A - slightly higher clamping voltage and lower IPPM | Preferred where tighter VBR tolerance is less critical than legacy SMB footprint reuse | Select SMBJ180A only if board layout uses smaller DO-214AA pads; verify thermal relief adequacy for 1500W dissipation |
| SMCJ180A (Littelfuse) | Identical DO-214AB package; same 1500W rating; VBR = 171–189V; VC = 246V @ 6.4A - functionally matched clamping and leakage specs | Drop-in replacement with identical thermal and electrical behavior; qualified for extended temperature screening | Choose SMCJ180A for AEC-Q200-compliant designs or where extended qualification data (e.g., HTOL, TCT) is mandated |
Compared with 1.5SMC180A, SMBJ180A requires PCB pad revision due to smaller DO-214AA footprint and delivers 13V higher clamping under identical surge conditions, whereas SMCJ180A offers identical electrical performance with broader automotive qualification coverage - making it the preferred alternative for safety-critical deployments.
Availability
1.5SMC180A is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC digital I/O, and telecom DC power feeds requiring stable component supply, long-lifecycle support, and RoHS/halogen-free compliance.
Supply support for 1.5SMC180A 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 - headquartered in Hsinchu Science Park with global distribution and AEC-Q200-qualified production lines.
The 1.5SMCxxA series targets high-energy transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial automation, and telecom infrastructure where ISO 7637-2 and IEC 61000-4-5 compliance are mandatory.
FAQ
What is the polarity configuration of the 1.5SMC180A?
The 1.5SMC180A is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package body. It conducts only when the cathode is biased positively relative to the anode - ideal for protecting positive DC rails. Bidirectional variants use the "C" or "CA" suffix (e.g., 1.5SMC180CA), which are not interchangeable with the 1.5SMC180A.
Does the 1.5SMC180A meet automotive surge immunity standards?
Yes, the 1.5SMC180A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for 12V and 24V vehicle electrical systems. Its 1500W peak power rating and 246V clamping voltage at 6.4A ensure compliance with load-dump and supply-transient test profiles without additional passive filtering - verified per manufacturer test reports.
What is the maximum allowable junction temperature for continuous operation of the 1.5SMC180A?
The 1.5SMC180A has a maximum junction temperature (TJ) of +150°C, with derating beginning above 25°C ambient per the published pulse derating curve. At 70°C ambient, its peak pulse power drops to ~1100W; full 1500W is only sustainable at TA ≤25°C with adequate PCB copper thermal relief.
How does the 1.5SMC180A compare to the 1.5SMC180 (non-A) variant?
The 1.5SMC180A offers tighter VBR tolerance (171–189V vs. 162–198V for 1.5SMC180) and lower temperature coefficient (0.108%/°C vs. same value but broader initial spread). The "A" suffix indicates enhanced parameter consistency - critical for designs requiring precise clamping thresholds across temperature and production batches.
Is the 1.5SMC180A compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC180A's matte tin-plated leads are fully compatible with IPC/JEDEC J-STD-020 moisture sensitivity level 1 handling and standard lead-free reflow profiles (peak 260°C, 60s max). No pre-baking is required, and the device withstands multiple reflow cycles without parameter shift or delamination.
1.5SMC180A 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):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
1.5SMC180A FAQ
1.How can I place an order for 1.5SMC180A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC180A 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 1.5SMC180A reliable?
The price and inventory of 1.5SMC180A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC180A is usually 5 days.
3.What payment methods are accepted for 1.5SMC180A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC180A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC180A?
1.5SMC180A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC180A 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 1.5SMC180A?
For technical support, including 1.5SMC180A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC180A requirements.
6.How does Aetrix verify that 1.5SMC180A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC180A 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 1.5SMC180A meets industry standards.
7.What is the process for return or replacement of 1.5SMC180A?
All 1.5SMC180A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC180A, 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 1.5SMC180A part is unused and in its original packaging.
Return procedure for 1.5SMC180A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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