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Taiwan Semiconductor Corporation 1.5SMC30
- Part No.:
- 1.5SMC30
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30.pdf
- Description:
- 1500W, 30V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,457
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Product details
Overview
1.5SMC30 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 30V breakdown voltage range (27.0–33.0V), 1500W peak pulse power rating, 43.5V maximum clamping voltage at 36A surge current, and DO-214AB (SMC) package - used in telecom line cards, industrial PLC I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC30 datasheet, 1.5SMC30 pinout, 1.5SMC30 application, or 1.5SMC30 equivalent, this page delivers verified electrical specs, thermal performance data, clamping behavior under 10/1000μs transients, RoHS/halogen-free compliance status, and direct alternatives with documented VBR, VC, and IPPM differences.
Technical Context
The 1.5SMC30 operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response (<1.0ps) to ESD and lightning-induced transients. Its 24.3V working stand-off voltage ensures reliable blocking during normal operation while maintaining low leakage (<1μA at VWM).
Thermally, it exhibits RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained 6.5W steady-state dissipation at 25°C ambient. The device meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements for automotive electronics and complies with JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 27.0–33.0V - defines minimum/maximum voltage at which avalanche conduction begins; critical for margining against system overvoltage thresholds |
| VWM | 24.3V - maximum continuous reverse operating voltage; must exceed nominal rail voltage (e.g., 24V systems) to prevent leakage-induced power loss |
| VC @ IPPM = 36A | 43.5V - clamped voltage during 10/1000μs surge; determines protected circuit's maximum transient exposure level |
| IPPM | 36A - peak impulse current capability; sets survivability limit for standardized lightning surges (IEC 61000-4-5) |
| PPK | 1500W - peak pulse power handling per 1ms pulse; enables robust protection without derating in short-duration events |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs heatsinking requirements when operating near 6.5W steady-state limit |
| Junction Temp Range | −55°C to +150°C - supports deployment in under-hood automotive, industrial enclosures, and outdoor telecom equipment |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210g. Molding compound rated UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line's low-side reference (e.g., GND or negative rail); completes clamping loop during surge |
| Cathode | Transient voltage sensing / clamping node | Connected to protected line (e.g., 24V supply); conducts when VK–A exceeds VBR, shunting surge energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics across temperature and lifetime; eliminates moisture-induced parameter drift |
| Sub-1ps response time | Clamps ESD events (IEC 61000-4-2) before sensitive ICs experience overstress - critical for USB, RS-485, and CAN physical layers |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transients (Pulse 1/2a/2b/3a/3b); suitable for 12V/24V vehicle subsystems |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; supports lead-free reflow assembly and environmental compliance programs |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and reduces manufacturing overhead |
Applications
| Industrial PLC Analog Input Protection | Automotive Body Control Module Power Rail |
|---|---|
Use Scenario: Protects 4–20mA current-loop inputs from field-wiring induced surges and ESD during sensor replacement. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and ground, clamping transients before they reach precision ADC front-end. Use Value: Limits voltage seen by op-amp input stage to ≤43.5V during 36A 10/1000μs surge, preserving measurement accuracy and preventing latch-up. |
Use Scenario: Shields 24V supply rail of BCM microcontroller from load-dump pulses during alternator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, activated within <1ps to divert >100A surge energy away from LDOs and MCU. Use Value: Maintains downstream rail stability below 45V during ISO 7637-2 Pulse 5a (load dump), avoiding brownout resets and flash corruption. |
| Telecom Line Card DC Feeding Protection | Factory Automation EtherCAT Slave Port |
Use Scenario: Safeguards -48V DC feeding circuits in central office line cards from lightning-induced common-mode surges on copper pairs. IC Role / Device Role / Timing Role: Unidirectional TVS on feed line output, referenced to chassis ground, absorbing differential and common-mode energy. Use Value: Clamps surge to 43.5V while sustaining 1500W peak power, preventing damage to isolation transformers and DC-DC controllers. |
Use Scenario: Protects EtherCAT PHY power pins (VDDP/VDDA) from ESD events during cable hot-plug and factory floor static discharge. IC Role / Device Role / Timing Role: Localized TVS adjacent to RJ45 connector, shunting HBM ±8kV ESD pulses directly to ground plane. Use Value: Sub-1ps response ensures clamping occurs before PHY internal ESD structures fail, meeting IEC 61000-4-2 Level 4 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A (Bourns) | VBR = 33.3–36.7V; VC = 48.4V @ 31A; PPK = 600W; SMB package (smaller footprint, lower power) | Lower peak power rating limits use in high-energy automotive load-dump scenarios; better suited for space-constrained consumer ports | Select SMBJ30A only if board area is constrained and surge energy is limited to ≤600W (e.g., USB-C PD side-rail protection) |
| 1.5KE30A (ON Semiconductor) | VBR = 28.5–31.5V; VC = 43.0V @ 35A; PPK = 1500W; DO-201 package (through-hole, higher thermal mass) | Through-hole mounting requires wave solder or hand-solder; less compatible with automated SMT lines but offers superior long-term thermal cycling reliability | Choose 1.5KE30A for legacy through-hole designs or where mechanical robustness under vibration exceeds SMT retention requirements |
Compared with 1.5SMC30, SMBJ30A trades 900W peak power and SMC-mount compatibility for smaller size, while 1.5KE30A retains full 1500W capability but sacrifices SMT automation efficiency for enhanced mechanical durability in harsh environments.
Availability
1.5SMC30 is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive body control module power rails, telecom line card DC feeding circuits, and factory automation EtherCAT slave ports requiring stable component supply with full traceability and lifecycle management.
Supply support for 1.5SMC30 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 for industrial, automotive, and telecom markets.
The 1.5SMC series was engineered specifically for high-reliability surface-mount transient suppression in space-constrained, high-surge environments - emphasizing fast response, stable clamping, and automated assembly compatibility.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC30?
The 1.5SMC30 has a specified breakdown voltage range of 27.0V to 33.0V at 1.0mA test current, representing a ±10% tolerance around the nominal 30V rating. This tolerance is measured per ANSI/IEEE C62.35 and reflects manufacturing variance under controlled 30ms square-wave pulse conditions - critical for designing safe voltage margins in 24V systems where VBR must exceed maximum operating voltage.
Is the 1.5SMC30 suitable for bidirectional transient protection?
No, the 1.5SMC30 is a unidirectional TVS diode intended for DC rail protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or data buses, Taiwan Semiconductor specifies the 1.5SMC30C or 1.5SMC30CA variants - which include symmetrical breakdown in both directions and require different marking codes (e.g., EQJ vs. ERJ). Using 1.5SMC30 in reverse-biased AC configurations risks permanent failure due to forward conduction.
What is the maximum clamping voltage of the 1.5SMC30 under surge conditions?
The 1.5SMC30 exhibits a maximum clamping voltage (VC) of 43.5V when subjected to its rated 36A peak pulse current (IPPM) with a 10/1000μs waveform. This value is guaranteed across temperature and represents the highest voltage that will appear across the protected line during worst-case surge events - essential for ensuring downstream components like 48V-tolerant transceivers remain within absolute maximum ratings.
Does the 1.5SMC30 meet automotive transient immunity standards?
Yes, the 1.5SMC30 meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (capacitive coupling) requirements. Its 1500W peak power rating, 43.5V clamping, and −55°C to +150°C junction temperature range make it suitable for protecting 12V/24V automotive subsystems including body control modules, infotainment power supplies, and sensor interfaces - provided layout follows recommended pad geometry and grounding practices.
What is the thermal resistance profile of the 1.5SMC30?
The 1.5SMC30 has a junction-to-ambient thermal resistance (RθJA) of 50°C/W and junction-to-case resistance (RθJC) of 15°C/W, measured under standard JEDEC PCB conditions. These values determine how effectively heat dissipates during repetitive surge events or elevated ambient temperatures - for example, at 6.5W steady-state dissipation, junction temperature rises 325°C above ambient, confirming the need for proper copper pour and airflow in high-power applications.
1.5SMC30 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):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
1.5SMC30 FAQ
1.How can I place an order for 1.5SMC30 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30 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 1.5SMC30 reliable?
The price and inventory of 1.5SMC30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30 is usually 5 days.
3.What payment methods are accepted for 1.5SMC30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30?
1.5SMC30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30 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 1.5SMC30?
For technical support, including 1.5SMC30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30 requirements.
6.How does Aetrix verify that 1.5SMC30 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30 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 1.5SMC30 meets industry standards.
7.What is the process for return or replacement of 1.5SMC30?
All 1.5SMC30 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30, 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 1.5SMC30 part is unused and in its original packaging.
Return procedure for 1.5SMC30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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