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Taiwan Semiconductor Corporation 1.5SMC75H
- Part No.:
- 1.5SMC75H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75H.pdf
- Description:
- 1500W, 75V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
1.5SMC75H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode rated for 1500W peak pulse power, 60.7V working stand-off voltage, and 108V maximum clamping voltage at 14A peak impulse current. It features glass-passivated junction, AEC-Q101 qualification, and ISO 7637-2 compliance for automotive load-dump and ESD protection in DC power rails.
For engineers reviewing the 1.5SMC75H datasheet, 1.5SMC75H pinout, 1.5SMC75H application, or 1.5SMC75H equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA @ 60.7V), thermal resistance (RθJA = 50°C/W), and DO-214AB package compatibility with automated SMT assembly.
Technical Context
The 1.5SMC75H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 67.5–82.5V breakdown range (tested at 1mA). Its fast response (<1.0ps) enables suppression of ESD events and switching transients before sensitive downstream circuitry is damaged.
Designed for single-die configuration in DO-214AB (SMC) package, it delivers 1500W peak pulse power per 1ms waveform (per Fig.5), with derating above 25°C ambient per Fig.2. Junction temperature range is –55°C to +150°C, supporting under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60.7 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR min/max | 67.5 V / 82.5 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC@IPPM | 108 V - Clamped voltage seen by protected circuit during 14 A 10/1000μs surge |
| PPK | 1500 W - Peak transient power dissipation capability for non-repetitive 1 ms pulses |
| RθJA | 50 °C/W - Thermal resistance from junction to ambient, critical for PCB copper area design |
| IPPM | 14 A - Maximum peak impulse current the device safely clamps without failure |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling high-temperature deployment |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 12V rail); conducts reverse surge current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD/coupled noise) |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | <1.0 ps - Limits voltage overshoot during nanosecond-scale ESD events (IEC 61000-4-2) |
| Moisture sensitivity level 1 | No floor life limitation; safe for reflow without baking per J-STD-020 |
Applications
| Automotive Power Rail Protection | Industrial DC Input Stage |
|---|---|
Use Scenario: Protecting engine control unit (ECU) 12V supply against load-dump transients up to 35V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping surges before LDO or DC-DC converter. Use Value: Limits voltage to ≤108V during 14A surge, preventing damage to 16V-rated input stages and meeting OEM immunity requirements. | Use Scenario: Safeguarding programmable logic controller (PLC) 24V DC input terminals from field-wiring induced transients and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary surge clamp on terminal block feed, coordinated with upstream PTC and downstream TVS arrays. Use Value: Absorbs 1500W peak energy without degradation, maintaining <1μA leakage at 24V nominal to avoid false tripping of sensing circuits. |
| Telecom Power Interface | Consumer Equipment DC Adapter Input |
Use Scenario: Front-end protection for PoE-powered network switches handling IEEE 802.3af/at surges and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48V bias rail, selected for VWM > 48V and clamping margin below switch FET VDSS. Use Value: 60.7V VWM ensures no conduction during normal operation; 108V VC stays below 120V MOSFET rating under worst-case 10/1000μs event. | Use Scenario: Input-stage surge suppression for USB-C PD adapters and AC/DC wall adapters exposed to mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV and common-mode choke, targeting differential-mode residual spikes. Use Value: Low RθJA (50°C/W) supports compact layout near input rectifier; DO-214AB footprint allows high-density placement without thermal crowding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | 600W rating, SMB package (smaller footprint), 100V clamping at 6.9A | Limited to lower-energy transients; not suitable for ISO 7637-2 Pulse 5a | Select when space-constrained and peak surge energy ≤600W |
| 1.5KE75A | Through-hole TO-204AA (DO-41), 1500W, 108V clamping at 14A, but slower response (~1ns) | Not compatible with automated SMT lines; requires wave solder or hand assembly | Select only for legacy through-hole designs or prototyping where rework tolerance is prioritized |
Compared with SMBJ75A and 1.5KE75A, the 1.5SMC75H uniquely combines 1500W SMT capability, sub-nanosecond response, AEC-Q101 qualification, and ISO 7637-2 compliance-making it the preferred choice for production automotive and industrial SMT power-rail protection where reliability, density, and standard compliance are mandatory.
Availability
1.5SMC75H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power interfaces, and consumer adapter inputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC75H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The 1.5SMC75H belongs to TSC's AEC-Q101-qualified SMC-family TVS portfolio, engineered specifically for robust, high-power transient suppression in automotive and industrial surface-mount power systems.
FAQ
What is the clamping voltage of the 1.5SMC75H under a standard 10/1000μs surge?
The 1.5SMC75H has a maximum clamping voltage (VC) of 108 V when subjected to its rated peak impulse current of 14 A with a 10/1000μs waveform. This value is measured per IEC 61000-4-5 and ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC75H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC75H suitable for bidirectional transient protection?
No, the 1.5SMC75H is a unidirectional TVS diode intended for DC rail protection with defined polarity. For bidirectional applications such as AC lines or data bus protection, TSC offers the 1.5SMC75AH variant (with "AH" suffix), which provides symmetrical clamping in both directions. Using the 1.5SMC75H in reverse-biased AC configurations may result in forward conduction and failure.
Does the 1.5SMC75H meet automotive qualification standards?
Yes, the 1.5SMC75H is AEC-Q101 qualified and meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b-covering load-dump, supply interruption, and coupled transient immunity. It is rated for junction temperatures from –55°C to +150°C and passes JESD201 Class 2 whisker testing, confirming suitability for under-hood and chassis-mounted automotive modules.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC75H?
The 1.5SMC75H has a junction-to-ambient thermal resistance (RθJA) of 50°C/W under standard JEDEC conditions. To maintain safe operation during repetitive surges or elevated ambient temperatures, PCB layout must provide adequate copper area-typically ≥100 mm² of 2 oz copper connected to both terminals-to approximate the test condition. Insufficient copper increases effective RθJA, risking thermal runaway during sustained transient activity.
How does the 1.5SMC75H compare to the 1.5SMC75AH in terms of electrical performance?
The 1.5SMC75H (unidirectional) and 1.5SMC75AH (bidirectional) share identical VWM (60.7 V), VBR range (67.5–82.5 V), and VC (108 V), but differ in polarity behavior: the 1.5SMC75H blocks in reverse and conducts only during negative surges relative to cathode, while the 1.5SMC75AH clamps symmetrically in both directions. The 1.5SMC75AH exhibits doubled leakage (≤2 μA) below 10 V due to dual-junction structure, per datasheet Note 3.
1.5SMC75H 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):
- 60.7V
- Voltage - Breakdown (Min):
- 67.5V
- Voltage - Clamping (Max) @ Ipp:
- 108V
- Current - Peak Pulse (10/1000µs):
- 14A
- 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)
1.5SMC75H FAQ
1.How can I place an order for 1.5SMC75H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75H 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 1.5SMC75H reliable?
The price and inventory of 1.5SMC75H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC75H is usually 5 days.
3.What payment methods are accepted for 1.5SMC75H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75H?
1.5SMC75H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75H 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 1.5SMC75H?
For technical support, including 1.5SMC75H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75H requirements.
6.How does Aetrix verify that 1.5SMC75H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75H 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 1.5SMC75H meets industry standards.
7.What is the process for return or replacement of 1.5SMC75H?
All 1.5SMC75H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75H, 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 1.5SMC75H part is unused and in its original packaging.
Return procedure for 1.5SMC75H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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