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Taiwan Semiconductor Corporation 1.5SMC7.5AH
- Part No.:
- 1.5SMC7.5AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC7.5AH.pdf
- Description:
- 1500W, 7.5V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
1.5SMC7.5AH 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 7.13–7.88 V breakdown voltage (VBR), 6.40 V working stand-off voltage (VWM), 1500 W peak pulse power (PPK), and clamps to ≤11.3 V at 500 A peak impulse current - deployed in automotive infotainment power inputs and industrial sensor interfaces.
For engineers reviewing the 1.5SMC7.5AH datasheet, 1.5SMC7.5AH pinout, 1.5SMC7.5AH application, or 1.5SMC7.5AH equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) and low leakage (<1 µA at 6.40 V). Its unidirectional configuration provides asymmetric clamping - forward conduction only during reverse-transient events - making it suitable for DC-biased lines where polarity is fixed.
The device is housed in a DO-214AB (SMC) package with matte tin-plated leads, rated for 150°C maximum junction temperature and compliant with AEC-Q101 stress testing. Thermal resistance is 15°C/W junction-to-case and 50°C/W junction-to-ambient, enabling reliable operation under pulsed surge conditions without external heatsinking in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.13 V / 7.88 V - defines minimum and maximum guaranteed avalanche initiation threshold at 10 mA test current |
| VWM | 6.40 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC@IPPM | ≤11.3 V at 500 A - clamping voltage during worst-case 10/1000 µs surge; ensures downstream ICs see <11.3 V during transients |
| IR@VWM | ≤1 µA - ultra-low leakage preserves battery life and avoids false triggering in high-impedance circuits |
| PPK | 1500 W - peak pulse power handling per 10/1000 µs waveform; supports ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery disconnect) |
| TJ max | +150°C - enables use in under-hood automotive modules and industrial enclosures without thermal shutdown |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 2.59 mm lead spacing and 0.210 g mass; compatible with automated pick-and-place |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case with cathode band marking; matte tin-plated leads; polarity indicated by single black band on cathode end; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / ground reference | Connected to system ground or low-side rail; carries full surge current during clamping |
| Cathode | Protected line input | Connected to supply rail or signal line being protected; avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for front-end power protection in ADAS ECUs |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (battery transients), and Pulse 3a/3b (capacitive coupling) - eliminates need for additional filtering stages |
| Glass-passivated junction | Stable VBR tolerance and long-term leakage performance across temperature and humidity; prevents parameter drift in harsh environments |
| Fast response time | <1.0 ps - reacts before most microcontroller I/O pins can be damaged by ESD or lightning-induced surges |
| Moisture sensitivity level 1 | No baking required prior to reflow; compatible with standard J-STD-020 assembly processes - reduces manufacturing overhead |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed infotainment head unit exposed to load-dump transients up to 35 V and ISO 7637-2 Pulse 1. IC Role / Device Role / Timing Role: Primary clamping element placed between fuse and DC-DC converter input, absorbing >95% of surge energy before it reaches downstream regulators. Use Value: Clamps to ≤11.3 V at 500 A, ensuring input stage remains within absolute maximum ratings of 16 V-rated buck converters. | Use Scenario: 4–20 mA current-loop sensor node in factory automation, subject to ESD events and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5SMC7.5AH placed across loop supply to shunt transients to ground. Use Value: Leakage <1 µA at 6.40 V avoids disturbing precision current-source accuracy; 1500 W rating handles multi-kV ESD strikes without degradation. |
| Telecom Line Card Surge Suppression | Consumer USB Power Rail Protection |
Use Scenario: DC-powered telecom base station card with +5 V auxiliary rail feeding FPGA I/O banks. IC Role / Device Role / Timing Role: Standoff voltage (6.40 V) selected to exceed nominal 5 V rail while allowing margin below FPGA VCCIO abs max (5.5 V). Use Value: Clamping voltage ≤11.3 V exceeds safe limit but is acceptable due to short duration (1 ms); no secondary crowbar needed. | Use Scenario: USB-C PD port on portable speaker, where 5 V VBUS may experience hot-plug transients and ESD. IC Role / Device Role / Timing Role: Placed between USB connector and port controller, with cathode to VBUS and anode to chassis ground. Use Value: 1.0 ps response prevents latch-up in USB PHY; RoHS/halogen-free compliance meets consumer product regulatory requirements. |
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 (600 W), higher VC (12.0 V @ 30 A), same DO-214AA package | Insufficient for ISO 7637-2 Pulse 1; limited to lower-energy ESD and data-line protection | Select only when surge energy is <600 W and clamping margin allows 12.0 V |
| 1.5KE7.5A | Through-hole TO-204AA (DO-41), 1500 W rating, VC = 12.0 V @ 125 A | Requires PCB redesign; unsuitable for high-density SMT layouts or automated assembly | Use only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ7.0A and 1.5KE7.5A, the 1.5SMC7.5AH delivers superior surge handling in a compact SMT footprint with tighter VBR tolerance (±4.9%) and lower clamping voltage - critical for protecting modern low-voltage ICs without sacrificing board space or assembly efficiency.
Availability
1.5SMC7.5AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor nodes, and telecom line-card designs requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC7.5AH 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 specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust glass-passivated junction construction for long-term field stability.
FAQ
What is the breakdown voltage range for the 1.5SMC7.5AH?
The 1.5SMC7.5AH has a guaranteed breakdown voltage (VBR) range of 7.13 V to 7.88 V at 10 mA test current, measured per ANSI/IEEE C62.35. This tight ±4.9% tolerance ensures predictable clamping onset across production lots and temperature extremes, supporting precise overvoltage design margins in safety-critical systems.
Is the 1.5SMC7.5AH suitable for bidirectional transient protection?
No - the 1.5SMC7.5AH is a unidirectional TVS diode intended for DC-biased lines with defined polarity. For bidirectional protection, TSC offers the 1.5SMC7.5CAH variant (with CAH suffix), which provides symmetrical clamping in both directions and uses the same DO-214AB package.
What is the maximum clamping voltage of the 1.5SMC7.5AH under surge conditions?
The 1.5SMC7.5AH clamps to a maximum of 11.3 V at 500 A peak impulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured at TA = 25°C and must be derated per Fig.2 in the datasheet when ambient temperature exceeds 25°C.
Does the 1.5SMC7.5AH meet automotive qualification standards?
Yes - the 1.5SMC7.5AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction and moisture sensitivity level 1 rating further support automotive under-hood and cabin module deployment.
What is the thermal resistance specification for the 1.5SMC7.5AH?
The 1.5SMC7.5AH has a junction-to-case thermal resistance (RθJC) of 15°C/W and a junction-to-ambient thermal resistance (RθJA) of 50°C/W, measured on standard FR-4 PCB with 1-inch² copper pad. These values enable accurate thermal modeling for surge duty-cycle analysis and ensure safe operation up to 150°C junction temperature.
1.5SMC7.5AH 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):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 139A
- 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)
1.5SMC7.5AH FAQ
1.How can I place an order for 1.5SMC7.5AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC7.5AH 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 1.5SMC7.5AH reliable?
The price and inventory of 1.5SMC7.5AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC7.5AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC7.5AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC7.5AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC7.5AH?
1.5SMC7.5AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC7.5AH 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 1.5SMC7.5AH?
For technical support, including 1.5SMC7.5AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC7.5AH requirements.
6.How does Aetrix verify that 1.5SMC7.5AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC7.5AH 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 1.5SMC7.5AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC7.5AH?
All 1.5SMC7.5AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC7.5AH, 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 1.5SMC7.5AH part is unused and in its original packaging.
Return procedure for 1.5SMC7.5AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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