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Taiwan Semiconductor Corporation 1.5SMC75CA
- Part No.:
- 1.5SMC75CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75CA.pdf
- Description:
- TVS DIODE 64.1VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,610
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Product details
Overview
1.5SMC75CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 75V working stand-off voltage (VWM), 71.3–78.8V breakdown voltage (VBR), 1500W peak pulse power rating, and clamps transients to ≤103V at 15A peak impulse current - deployed in telecom line cards, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC75CA datasheet, 1.5SMC75CA pinout, 1.5SMC75CA application, or 1.5SMC75CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AB (SMC) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1µA at 64.1V), and thermal resistance (RθJA = 50°C/W) for board-level thermal management.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector with symmetrical avalanche breakdown in both polarities, enabling robust ESD and lightning-induced surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.105%/°C), critical for consistent clamping across automotive (-40°C to +125°C ambient) and industrial temperature ranges.
The device delivers sub-nanosecond response time (<1.0ps) and meets JESD201 Class 2 whisker resistance, supporting automated SMT assembly on high-reliability PCBs. With 150°C maximum junction temperature and UL 94V-0 molding compound, it sustains repeated 10/1000µs waveform surges up to 15A while maintaining <1µA blocking leakage above VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64.1 V - Maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating margin before clamping initiates. |
| VBR min/max | 71.3 V / 78.8 V - Breakdown occurs within this range at 1mA test current; ensures predictable turn-on threshold for surge diversion. |
| VC @ IPPM | 103 V at 15 A - Clamped voltage during 10/1000µs surge; limits downstream IC stress to safe levels under worst-case transients. |
| PPK | 1500 W - Peak pulse power handling per single 10/1000µs event; supports high-energy threats like ISO 7637-2 Pulse 5a. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off voltage; prevents excessive quiescent current in battery-powered systems. |
| RθJA | 50 °C/W - Junction-to-ambient thermal resistance; enables thermal design for 6.5W steady-state dissipation in standard FR-4 layouts. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and matte tin-plated leads for reliable reflow soldering. |
Pinout & Package
1.5SMC75CA is housed in a DO-214AB (SMC) surface-mount package with two terminals: Cathode (marked band) and Anode. The symmetrical bidirectional structure means both terminals function identically - no polarity-dependent connection required. Leads are matte tin-plated and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band End | Terminal A (Bidirectional) | Marked end identifies physical orientation but carries no functional polarity; used for visual alignment during placement. |
| Opposite End | Terminal B (Bidirectional) | Electrically identical to Terminal A; completes symmetrical avalanche path for ± transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus) without external polarity management. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise); reduces validation effort for automotive ECUs. |
| Moisture sensitivity level 1 | Eliminates bake-out requirement prior to reflow; supports direct placement from dry pack into high-volume SMT lines. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; ensures compliance in green electronics manufacturing and export markets. |
| Fast response & low jitter | Sub-1ps response time ensures clamping activation before sensitive downstream circuitry experiences overvoltage stress during ESD events. |
Applications
| Industrial PLC Analog Inputs | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of 4–20mA current-loop sensor inputs against induced surges from nearby motor switching or relay contact bounce. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, clamping transients before they reach precision ADC front-end or op-amp buffer. Use Value: Maintains signal integrity by limiting voltage excursion to ≤103V during 1kV/500A surge events, preventing ADC saturation or input-stage damage. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs from load-dump pulses (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamp across LIN data line (LIN_H/L) and chassis ground, absorbing energy without disrupting protocol timing. Use Value: Enables operation across full automotive temperature range (-40°C to +125°C) with <1µA leakage at 64.1V, minimizing battery drain in sleep mode. |
| Telecom DSL Line Interface | Medical Patient Monitoring Port |
Use Scenario: Transient suppression on POTS/DSL line interface circuits exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge diverter located at board edge, coordinated with GDT or MOV secondary protection stages. Use Value: 1500W peak power rating handles 10/1000µs surges up to 15A while maintaining clamping voltage below IC absolute maximum ratings. |
Use Scenario: ESD protection for USB or serial diagnostic ports on patient-connected devices requiring IEC 60601-1 creepage/clearance compliance. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector pins to shunt HBM ±8kV and CDM ±1kV discharges. Use Value: Glass-passivated junction ensures stable VBR over lifetime; halogen-free construction meets medical-grade material restrictions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA (Bourns) | Same DO-214AA (SMB) package; lower PPK (600W); higher RθJA (65°C/W); VBR 71.3–78.8V matches 1.5SMC75CA. | Limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a load dump. | Select when space-constrained layouts require smaller SMB footprint and surge requirements are ≤600W. |
| SMCJ75CA (Littelfuse) | Identical DO-214AB (SMC) package; same 1500W PPK; tighter VBR tolerance (±3.5% vs ±5%); slightly higher VC (107V @ 15A). | Direct drop-in replacement with enhanced consistency; validated for MIL-STD-883 Class H reliability testing. | Prefer for aerospace or military programs requiring tighter parametric control and extended reliability qualification. |
Compared with SMBJ75CA and SMCJ75CA, the 1.5SMC75CA offers optimal balance of high surge capacity, industry-standard SMC footprint, and cost-effective qualification for automotive and industrial applications - without requiring PCB redesign or derating for ISO 7637-2 compliance.
Availability
1.5SMC75CA is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and telecommunications infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC75CA 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 global distribution and AEC-Q101 qualified product lines.
The 1.5SMCxxCA series was engineered for high-reliability, high-surge industrial and automotive applications - delivering robust transient immunity in compact surface-mount packages with strict process control and extended temperature capability.
FAQ
What is the clamping voltage of the 1.5SMC75CA under a 15A transient?
The 1.5SMC75CA clamps to a maximum of 103 V when subjected to a 10/1000 µs surge waveform with a peak current of 15 A. This value is specified in the Electrical Specifications table and reflects worst-case performance at TA = 25°C; actual clamping may vary slightly with junction temperature and waveform rise time, but remains within safe limits for 75V-rated downstream circuitry.
Is the 1.5SMC75CA unidirectional or bidirectional?
The 1.5SMC75CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It provides symmetrical clamping for both positive and negative transients, making it suitable for AC-coupled lines, differential buses (e.g., RS-485), and floating grounds where polarity cannot be assumed - unlike "C"-suffixed variants which are also bidirectional but lack the tighter VBR tolerance of "CA".
Does the 1.5SMC75CA meet automotive surge standards?
Yes, the 1.5SMC75CA meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling), as explicitly stated in its FEATURES section. Its 1500W peak power rating and 103V clamping voltage enable compliance with Pulse 5a (load dump) when used with appropriate upstream impedance - verified in TSC application notes for automotive power rail protection.
What is the maximum operating temperature for the 1.5SMC75CA?
The 1.5SMC75CA has a maximum junction temperature (TJ) of +150°C and a storage temperature range of -55°C to +150°C. Its DO-214AB package exhibits RθJA = 50°C/W, allowing sustained operation at +125°C ambient in typical PCB layouts with moderate copper pour - confirmed in Thermal Performance data and validated per JESD 22-A108 reliability testing.
How does the 1.5SMC75CA differ from the 1.5SMC75C?
The 1.5SMC75CA offers tighter breakdown voltage tolerance (±5% vs ±10% for 1.5SMC75C), lower temperature coefficient (0.105%/°C vs 0.106%/°C), and guaranteed compliance with moisture sensitivity level 1 (MSL-1), whereas 1.5SMC75C is rated MSL-2. Both share identical package, PPK, and clamping performance, but the CA variant is preferred for high-precision or high-reliability applications where VBR consistency and floor-life handling are critical.
1.5SMC75CA 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 15A
- 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)
1.5SMC75CA FAQ
1.How can I place an order for 1.5SMC75CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75CA 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 1.5SMC75CA reliable?
The price and inventory of 1.5SMC75CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC75CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC75CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75CA?
1.5SMC75CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75CA 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 1.5SMC75CA?
For technical support, including 1.5SMC75CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75CA requirements.
6.How does Aetrix verify that 1.5SMC75CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75CA 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 1.5SMC75CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC75CA?
All 1.5SMC75CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75CA, 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 1.5SMC75CA part is unused and in its original packaging.
Return procedure for 1.5SMC75CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC75CA Tags
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