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Taiwan Semiconductor Corporation 1.5SMC7.5H
- Part No.:
- 1.5SMC7.5H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC7.5H.pdf
- Description:
- 1500W, 7.5V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,856
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Product details
Overview
1.5SMC7.5H 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 7.5V nominal breakdown voltage (6.75–8.25V), 6.05V working stand-off voltage, 134V maximum clamping voltage at 500A peak impulse current, and 1500W peak pulse power rating per 1ms waveform - deployed in automotive infotainment power inputs and industrial sensor interface protection.
For engineers reviewing the 1.5SMC7.5H datasheet, 1.5SMC7.5H pinout, 1.5SMC7.5H application, or 1.5SMC7.5H equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, leakage current at operating voltage, thermal resistance (RθJA = 50°C/W), AEC-Q101 qualification status, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device triggered by transient overvoltage events exceeding its reverse stand-off voltage (VWM = 6.05V). Its glass-passivated junction enables sub-1ps response time and <1μA leakage above 10V, meeting ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements for automotive electronics.
The device uses a single-die construction in DO-214AB (SMC) package with cathode band polarity marking, rated for -55°C to +150°C junction temperature and compliant with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.75V / 8.25V - defines guaranteed conduction onset range under 10mA test current; ensures reliable triggering before downstream IC damage threshold |
| VWM | 6.05V - maximum continuous reverse voltage without significant leakage; sets safe operating margin below VBR min |
| VC@IPPM | 11.7V at 500A - clamping voltage during 1ms 500A surge; determines worst-case stress on protected circuitry |
| PPK | 1500W - peak pulse power handling per 1ms waveform; supports high-energy transients like load dump or ESD |
| IR@VWM | <1μA - ultra-low blocking leakage at rated stand-off voltage; avoids parasitic loading of low-power sensor rails |
| TJ max | +150°C - maximum junction temperature; enables operation in under-hood automotive environments with minimal derating |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained power dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads, cathode indicated by band marking. Weight: 0.210g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in unidirectional configuration; carries surge current during clamping |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., 5V rail); avalanche breakdown initiates when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for front-end power protection in ADAS ECUs |
| Glass passivated junction | Enables stable VBR tolerance and <1ps response - critical for suppressing fast-rising ESD pulses per IEC 61000-4-2 |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a (battery disconnect), Pulse 3a/3b (capacitive coupling) - meets OEM power net immunity specs |
| DO-214AB (SMC) package | Standardized footprint compatible with high-speed pick-and-place; UL 94V-0 rated molding compound supports reflow soldering |
| Low clamping ratio (VC/VBR) | 11.7V / 7.5V ≈ 1.56 - tight voltage control minimizes overvoltage overshoot during clamping, protecting 5V/3.3V logic interfaces |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery-fed infotainment head unit exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary shunt TVS placed at DC jack input to clamp transients before LDO regulators and microcontrollers. Use Value: 1500W peak power rating and 11.7V clamping voltage limit stress on 16V-rated input capacitors and 5V system rails. |
Use Scenario: 4–20mA current loop transmitter in factory automation subject to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional protection (using 1.5SMC7.5AH variant) across loop terminals to prevent op-amp input damage. Use Value: Sub-1ps response and <1μA leakage preserve mA-loop accuracy while surviving ±8kV contact ESD per IEC 61000-4-2. |
| Telecom Line Surge Suppression | Consumer USB Port Protection |
Use Scenario: Ethernet PHY power supply (3.3V) in PoE-powered access point encountering induced lightning surges. IC Role / Device Role / Timing Role: Secondary TVS on isolated DC-DC output rail, coordinated with primary front-end protection. Use Value: 6.05V VWM provides 0.75V margin below 3.3V rail + 20% tolerance, preventing false triggering during normal operation. |
Use Scenario: VBUS line in USB-C receptacle subjected to hot-plug insertion transients and ESD events. IC Role / Device Role / Timing Role: Unidirectional clamping device between VBUS and GND, upstream of USB power delivery controller. Use Value: 134V clamping voltage (at 500A) is irrelevant here; instead, low capacitance (<100pF typical) avoids signal integrity degradation on 10Gbps SuperSpeed lanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower PPK (600W), higher VC (12.5V @ 30A), SMB package (smaller footprint, higher RθJA) | Not suitable for 500A surge events; limited to lower-energy transients in space-constrained consumer designs | Select when board area is critical and surge energy is ≤600W; verify thermal performance with reduced copper area |
| 1.5KE7.5A | Through-hole DO-201 package, same VBR/VC specs but slower response (>1ns), no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT is not required and automotive qualification is unnecessary | Choose only for through-hole prototyping or cost-sensitive non-automotive applications; avoid in new automotive designs |
Compared with SMBJ7.0A and 1.5KE7.5A, the 1.5SMC7.5H delivers higher surge robustness (1500W vs. 600W/1500W), automotive qualification, and SMT process compatibility - making it optimal for production automotive and industrial systems requiring validated reliability and high-energy clamping.
Availability
1.5SMC7.5H is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor transmitters, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for 1.5SMC7.5H 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 1.5SMC series was developed to deliver AEC-Q101-qualified, high-power surface-mount TVS protection for automotive and industrial power rails - emphasizing low clamping ratio, fast response, and robust thermal performance in DO-214AB packaging.
FAQ
What is the polarity configuration of the 1.5SMC7.5H?
The 1.5SMC7.5H is a unidirectional TVS diode with cathode band marking indicating the high-side terminal. When installed with cathode toward the protected line (e.g., 5V rail) and anode to ground, it conducts only during negative transients on the line - ideal for DC power rail protection where reverse voltage is not expected. This differs from bidirectional variants like 1.5SMC7.5AH, which protect against both polarities.
Does the 1.5SMC7.5H meet automotive qualification standards?
Yes, the 1.5SMC7.5H is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - confirming suitability for front-end power protection in automotive ECUs, body control modules, and infotainment systems.
What is the maximum clamping voltage of the 1.5SMC7.5H and how is it measured?
The 1.5SMC7.5H has a maximum clamping voltage (VC) of 11.7V at 500A peak impulse current (IPPM), tested using the 10/1000μs double-exponential waveform per Fig.5 in the datasheet. This value represents the worst-case voltage seen by downstream components during a full-energy 1500W transient, ensuring protected ICs rated for ≤12V absolute maximum survive the event.
How does the 1.5SMC7.5H compare to the 1.5SMC7.5AH variant?
The 1.5SMC7.5H is unidirectional with VWM = 6.05V and VBR = 6.75–8.25V, while the 1.5SMC7.5AH is also unidirectional but offers tighter VBR tolerance (7.13–7.88V) and slightly higher VWM (6.40V). Neither is bidirectional; true bidirectional versions use CH or CAH suffixes. The AH variant provides improved consistency for precision voltage-margin applications but shares identical package, power rating, and thermal specs with the 1.5SMC7.5H.
What PCB layout considerations apply to the 1.5SMC7.5H?
For optimal thermal and electrical performance, the 1.5SMC7.5H requires minimum 10mm² of 2oz copper pour connected to each pad per the DO-214AB suggested pad layout. Keep traces short and wide between the TVS and protected node to minimize inductance - critical for preserving sub-1ps response. Avoid routing sensitive signals near the device, and ensure cathode band orientation matches schematic polarity to prevent reverse-bias failure during operation.
1.5SMC7.5H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 134A
- 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)
1.5SMC7.5H FAQ
1.How can I place an order for 1.5SMC7.5H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC7.5H 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 1.5SMC7.5H reliable?
The price and inventory of 1.5SMC7.5H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC7.5H is usually 5 days.
3.What payment methods are accepted for 1.5SMC7.5H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC7.5H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC7.5H?
1.5SMC7.5H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC7.5H 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 1.5SMC7.5H?
For technical support, including 1.5SMC7.5H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC7.5H requirements.
6.How does Aetrix verify that 1.5SMC7.5H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC7.5H 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 1.5SMC7.5H meets industry standards.
7.What is the process for return or replacement of 1.5SMC7.5H?
All 1.5SMC7.5H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC7.5H, 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 1.5SMC7.5H part is unused and in its original packaging.
Return procedure for 1.5SMC7.5H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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