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Taiwan Semiconductor Corporation 1.5SMC7.5CA
- Part No.:
- 1.5SMC7.5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC7.5CA.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,759
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Product details
Overview
1.5SMC7.5CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge 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 telecom front-ends, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC7.5CA datasheet, 1.5SMC7.5CA pinout, 1.5SMC7.5CA application, or 1.5SMC7.5CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AB package compatibility, sub-1 ps response time, low leakage (<1 µA @ 6.4 V), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transients.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast transient suppression without degradation under repeated surges. Its bidirectional configuration enables symmetrical clamping across both polarities, eliminating need for polarity-aware layout - critical for AC-coupled interfaces and floating bus lines.
Thermal performance is defined by RθJA = 50 °C/W and RθJC = 15 °C/W, supporting sustained operation up to +150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.13 V / 7.88 V - ensures reliable triggering above 6.4 V operating rail while avoiding false trips during normal transients |
| VWM | 6.40 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| IPPM | 500 A - peak surge current it withstands per 10/1000 µs waveform (IEC 61000-4-5) without failure |
| VC@IPPM | ≤11.3 V - clamping voltage limiting downstream IC stress during worst-case surge events |
| PPK | 1500 W - peak pulse power handling capacity per single 1 ms transient per Fig.5 waveform |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood or enclosed industrial enclosures |
| Response time | <1.0 ps - intrinsic junction speed enabling suppression before logic-level damage occurs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminals 1 & 2) | Bidirectional surge path | Identical terminals - no polarity marking required; connects across protected line and ground (or between differential lines) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR and low leakage over 10+ years of field operation, even under humidity cycling |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) - essential for automotive ECUs |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly without dry-pack handling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - supports green manufacturing and end-of-life recycling |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates tin whisker risk per JESD201 Class 2 |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protects microcontroller GPIOs and LIN bus transceivers from load-dump spikes and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed between signal line and chassis ground, absorbing energy before it reaches sensitive analog front-end circuitry. Use Value: Limits voltage excursion to ≤11.3 V during 500 A ISO 7637-2 Pulse 2b event, preventing latch-up or gate oxide rupture in 3.3 V/5 V logic. |
Use Scenario: Shields RS-485 transceivers (e.g., THVD1550) from ESD and lightning-induced surges on long cable runs in factory automation networks. IC Role / Device Role / Timing Role: Placed differential-mode across A/B lines and common-mode to ground, suppressing both asymmetrical and symmetrical transients. Use Value: Clamps common-mode surges to <12 V within <1 ps, preserving signal integrity and meeting IEC 61000-4-2 Level 4 (15 kV contact) immunity. |
| Telecom DSL Line Interface | Consumer USB-C Power Delivery Port |
Use Scenario: Safeguards ADSL/VDSL line drivers and SLIC components from induced surges on outdoor copper pairs exposed to nearby lightning. IC Role / Device Role / Timing Role: Connected line-to-ground on each twisted pair, operating bidirectionally to handle polarity-agnostic surges. Use Value: Withstands 1500 W peak pulses per ITU-T K.21 recommendations while maintaining <1 µA leakage at 6.4 V standby voltage. |
Use Scenario: Protects USB-C CC and VBUS lines from hot-plug ESD and adapter transient coupling in portable electronics. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector, shunting ESD current before it enters PD controller or buck converter. Use Value: Sub-1 ps response ensures clamping initiates before 100 ns ESD rise time, limiting VCC rail overshoot to safe levels for USB-PD PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA (Bourns) | Lower PPK = 600 W; VBR = 7.78–8.6 V; SMB package (smaller footprint, higher RθJA) | Not suitable for ISO 7637-2 Pulse 1 (load dump); limited to lower-energy ESD-only scenarios | Select when board space is constrained and surge energy is ≤600 W - verify thermal derating at 85 °C ambient |
| 1.5KE7.5CA (ON Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but slower thermal recovery; no J-STD-020 MSL-1 rating | Requires wave solder or hand-solder; incompatible with automated SMT lines; unsuitable for moisture-sensitive environments | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ7.0CA and 1.5KE7.5CA, the 1.5SMC7.5CA delivers full 1500 W surge handling in an MSL-1 SMT package with verified ISO 7637-2 compliance - making it the only option among the three qualified for automotive-grade automated production and high-energy transient environments.
Availability
1.5SMC7.5CA is available at Aetrix Electronics and suitable for automotive body control modules, industrial RS-485 ports, and telecom DSL line interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC7.5CA 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, and rectifiers - serving automotive, industrial, and telecom markets since 1992.
The 1.5SMC series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - prioritizing ISO 7637-2 compliance, MSL-1 reliability, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC7.5CA at its rated peak pulse current?
The 1.5SMC7.5CA clamps to a maximum of 11.3 V at 500 A peak impulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ensures downstream 3.3 V or 5 V ICs remain within absolute maximum ratings during surge events. The 1.5SMC7.5CA achieves this with minimal voltage overshoot due to its sub-1 ps junction response.
Is the 1.5SMC7.5CA unidirectional or bidirectional, and how does that affect PCB layout?
The 1.5SMC7.5CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants, it has no cathode band marking and requires no polarity alignment during placement - simplifying layout and reducing assembly errors. The 1.5SMC7.5CA is ideal for AC-coupled lines, differential buses, and floating grounds where polarity reversal may occur.
Does the 1.5SMC7.5CA meet automotive transient immunity standards?
Yes, the 1.5SMC7.5CA is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (switching noise) test profiles. Its 1500 W peak power rating and ≤11.3 V clamping ensure robust protection for 12 V automotive ECUs. The 1.5SMC7.5CA's DO-214AB package also complies with JESD201 Class 2 whisker resistance for under-hood reliability.
What is the maximum working stand-off voltage (VWM) for the 1.5SMC7.5CA, and why does it matter?
The 1.5SMC7.5CA has a maximum working stand-off voltage (VWM) of 6.40 V - the highest continuous DC or RMS voltage it can block without exceeding 1 µA leakage. This parameter ensures the 1.5SMC7.5CA remains inactive during normal operation of 5 V or 6 V systems, avoiding power loss or false triggering while still responding instantly to transients exceeding ~7.1 V. It directly determines system voltage margin before clamping engages.
Can the 1.5SMC7.5CA be used in place of the 1.5SMC7.5A, and what is the key difference?
No - the 1.5SMC7.5CA and 1.5SMC7.5A are functionally distinct: the "CA" suffix denotes bidirectional operation, while "A" indicates unidirectional with a cathode band. Substituting the 1.5SMC7.5CA for the 1.5SMC7.5A would eliminate polarity awareness but may raise leakage in DC-biased circuits. The 1.5SMC7.5CA's bidirectional symmetry makes it unsuitable for rectifier-like applications where DC blocking directionality is required.
1.5SMC7.5CA 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):
- 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)
1.5SMC7.5CA FAQ
1.How can I place an order for 1.5SMC7.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC7.5CA 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 1.5SMC7.5CA reliable?
The price and inventory of 1.5SMC7.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC7.5CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC7.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC7.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC7.5CA?
1.5SMC7.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC7.5CA 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 1.5SMC7.5CA?
For technical support, including 1.5SMC7.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC7.5CA requirements.
6.How does Aetrix verify that 1.5SMC7.5CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC7.5CA 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 1.5SMC7.5CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC7.5CA?
All 1.5SMC7.5CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC7.5CA, 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 1.5SMC7.5CA part is unused and in its original packaging.
Return procedure for 1.5SMC7.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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