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Taiwan Semiconductor Corporation 1.5SMC7.5A
- Part No.:
- 1.5SMC7.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC7.5A.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,358
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Product details
Overview
1.5SMC7.5A 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 - enabling robust ESD and lightning surge immunity in telecom front-ends and industrial I/O modules.
For engineers reviewing the 1.5SMC7.5A datasheet, 1.5SMC7.5A pinout, 1.5SMC7.5A application, or 1.5SMC7.5A equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, unidirectional polarity marking, sub-1 ps response time, <1 µA leakage at 6.4 V, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive and harsh-environment designs.
Technical Context
This TVS operates as a clamping device: under normal bias (≤6.40 V), it presents high impedance with <1 µA leakage; during transients exceeding VBR (7.13–7.88 V), it avalanches rapidly to limit voltage across protected circuitry to ≤11.3 V at 500 A. Its glass-passivated junction ensures stable breakdown and low capacitance.
The 1.5SMC7.5A is rated for 150 °C maximum junction temperature, exhibits 50 °C/W junction-to-ambient thermal resistance, and supports 200 A non-repetitive forward surge current - confirming suitability for 12 V automotive supply rail protection and industrial PLC analog input stages where thermal margin and surge endurance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 10 mA | 7.13–7.88 V - defines minimum and maximum avalanche initiation threshold under standardized test conditions |
| VWM | 6.40 V - maximum continuous reverse operating voltage before significant leakage begins |
| IR @ VWM | <1 µA - ensures negligible standby power loss and no interference with 5–6 V logic or sensor reference rails |
| VC @ IPPM = 500 A | ≤11.3 V - clamping voltage limiting stress on downstream 5 V or 3.3 V ICs during 10/1000 µs surges |
| PPK | 1500 W - peak transient energy absorption capacity per single 10/1000 µs waveform per Fig.5 |
| TJMAX | 150 °C - enables operation in under-hood automotive or enclosed industrial enclosures without derating |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and matte tin leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; dual axial leads, matte tin-plated, solderable per J-STD-002; polarity indicated by cathode band (cathode = banded end); weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms current sink during avalanche conduction |
| Cathode (banded) | High-side connection point | Connected to protected line (e.g., 12 V rail or RS-485 bus); carries full surge current into ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5% for 'A' grade), low leakage, and long-term reliability under thermal cycling |
| Fast response time <1.0 ps | Clamps transients before sensitive downstream components (e.g., CAN transceivers, ADCs) experience overstress |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Enables standard SMT reflow without baking or special handling - reduces manufacturing cost and risk |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with global environmental regulations and supports lead-free assembly requirements |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial RS-485 Transceiver Protection |
|---|---|
Use Scenario: 12 V battery-supplied BCM exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping TVS placed directly at connector entry before LDO regulator input. Use Value: Limits voltage to ≤11.3 V during 500 A surges, protecting 15 V-rated input capacitors and 3.3 V microcontroller power domains. |
Use Scenario: RS-485 node in factory automation system subjected to ESD (IEC 61000-4-2) and cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on A/B differential lines referenced to local ground. Use Value: Clamps common-mode transients to ≤11.3 V while maintaining signal integrity below 100 pF junction capacitance. |
| Telecom DSL Line Card Surge Protection | Consumer Set-Top Box DC Power Ingress |
Use Scenario: DSLAM line card interface exposed to lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: First-stage protector on 12 V bias rail feeding line driver ICs. Use Value: Absorbs 1500 W peak pulses per ITU-T K.21 recommendations without degradation after repeated events. |
Use Scenario: 12 V wall adapter input of set-top box subject to AC line transients and ESD from user ports. IC Role / Device Role / Timing Role: Standoff-rated TVS on main DC input before bulk capacitor and DC-DC converter. Use Value: Blocks >6.4 V transients with <1 µA leakage, avoiding standby current increase and ensuring Energy Star compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A (Bourns) | Lower PPK (600 W), same DO-214AA (SMB) package, VBR = 7.78–8.6 V, VC = 12.0 V @ 30 A | Rated for lower-energy transients; suitable only where peak surge current ≤30 A | Select when space-constrained layouts require smaller SMB footprint and surge threat level is limited to IEC 61000-4-5 Level 3 |
| 1.5KE7.5A (ON Semiconductor) | Through-hole DO-15 package, same VBR/VC specs, PPK = 1500 W, but higher RθJA (70 °C/W) | Requires PCB through-hole mounting and larger thermal relief; less suitable for high-density SMT designs | Choose only for legacy through-hole production or where manual repairability outweighs automated placement efficiency |
Compared with SMBJ7.0A and 1.5KE7.5A, the 1.5SMC7.5A delivers identical 1500 W surge rating in a surface-mount DO-214AB package with superior thermal resistance (50 °C/W vs. 70 °C/W) and tighter VBR tolerance (±5% vs. ±10%), making it optimal for high-reliability automotive and industrial SMT assemblies.
Availability
1.5SMC7.5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial communication interfaces, telecom line cards, and consumer power input protection requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC7.5A 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, with ISO 9001 and IATF 16949 certification.
The 1.5SMC series was engineered for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure - emphasizing ruggedness, tight parametric control, and AEC-Q200 readiness.
FAQ
What is the breakdown voltage range for the 1.5SMC7.5A?
The 1.5SMC7.5A 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 ±5% tolerance ('A' suffix) ensures predictable clamping onset across temperature and production lots, critical for consistent protection of 5 V and 12 V systems.
Is the 1.5SMC7.5A unidirectional or bidirectional?
The 1.5SMC7.5A is a unidirectional TVS diode, indicated by the absence of 'C' or 'CA' suffix. It conducts only in reverse bias (cathode positive) and must be installed with the cathode band oriented toward the protected line. Bidirectional variants (e.g., 1.5SMC7.5CA) are separate part numbers.
What is the maximum clamping voltage of the 1.5SMC7.5A at rated surge current?
The 1.5SMC7.5A clamps to a maximum of 11.3 V at 500 A peak impulse current (IPPM) under the 10/1000 µs waveform defined in Fig.5. This value is measured at TA = 25°C and ensures downstream 5 V logic and analog circuits remain within safe operating limits during surge events.
Does the 1.5SMC7.5A meet automotive surge immunity standards?
Yes, the 1.5SMC7.5A meets ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), as explicitly stated in its datasheet. It is widely deployed in automotive infotainment, body control, and ADAS power supplies for certified EMC robustness.
What is the thermal resistance of the 1.5SMC7.5A, and how does it affect layout?
The 1.5SMC7.5A has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W. To maintain TJ ≤150 °C during repetitive surges, PCB copper area around the DO-214AB pads should exceed 100 mm² per pad with thermal vias - especially critical in sealed enclosures or high-temperature ambient environments.
1.5SMC7.5A 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC7.5A FAQ
1.How can I place an order for 1.5SMC7.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC7.5A 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 1.5SMC7.5A reliable?
The price and inventory of 1.5SMC7.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC7.5A is usually 5 days.
3.What payment methods are accepted for 1.5SMC7.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC7.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC7.5A?
1.5SMC7.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC7.5A 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 1.5SMC7.5A?
For technical support, including 1.5SMC7.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC7.5A requirements.
6.How does Aetrix verify that 1.5SMC7.5A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC7.5A 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 1.5SMC7.5A meets industry standards.
7.What is the process for return or replacement of 1.5SMC7.5A?
All 1.5SMC7.5A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC7.5A, 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 1.5SMC7.5A part is unused and in its original packaging.
Return procedure for 1.5SMC7.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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