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Taiwan Semiconductor Corporation SA7.0CA
- Part No.:
- SA7.0CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.0CA.pdf
- Description:
- TVS DIODE 7VWM 12VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,003
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Product details
Overview
SA7.0CA from Taiwan Semiconductor is a bidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 7.0V working stand-off voltage, 7.78–9.51V breakdown voltage at 10mA test current, and 13.3V maximum clamping voltage at 150A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA7.0CA datasheet, SA7.0CA pinout, SA7.0CA application, or SA7.0CA equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, DO-15 terminal polarity marking, AEC-Q101 qualification status, and real-world clamping performance under 10/1000μs surge conditions.
Technical Context
The SA7.0CA is a silicon avalanche diode designed for bidirectional transient suppression across both polarities, meeting IEC 61000-4-2 (±30kV contact), IEC 61000-4-4 (±4kV EFT), and ISO 7637-2 pulse 1/2/3a/3b immunity requirements. Its low dynamic impedance ensures stable clamping during fast-rising surges.
It operates over –55°C to +175°C junction temperature range, supports 70A non-repetitive forward surge current (8.3ms half-sine), and exhibits <1μA reverse leakage above 10V - confirming tight VWM–VBR margin control for reliable system-level protection without false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating threshold before clamping begins. |
| VBR min/max @ IT=10mA | 7.78 V / 9.51 V - Verified avalanche onset range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM=150A | 13.3 V - Clamped voltage during 10/1000μs surge; limits downstream IC stress to ≤13.3V under worst-case 500W transient. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; enables robust protection of 12V automotive and industrial bus lines. |
| IR @ VWM | <1 μA - Ultra-low leakage at stand-off voltage; prevents unnecessary power loss and signal integrity degradation in high-impedance circuits. |
| TJ max | +175 °C - Extended junction temperature rating; supports under-hood automotive placement and high-ambient industrial environments. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-204AC (DO-15) package with axial leads; cathode band marking indicates polarity for unidirectional variants only - SA7.0CA is bidirectional and has no polarity marking requirement per datasheet Section "Devices for bipolar applications".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either lead may connect to line or ground - enables flexible PCB layout for differential or common-mode transient suppression. |
| Lead 1 / Lead 2 | Current-carrying terminal | Both leads rated for 70A single half-sine surge (8.3ms); pure tin plating ensures solderability per J-STD-002 and long-term intermetallic stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS power domains. |
| 500W 10/1000μs surge capability | Withstands 150A peak pulse current without degradation - meets ISO 7637-2 Pulse 5a (load dump) energy requirements when used with appropriate series impedance. |
| Clamping voltage ≤13.3V at 150A | Provides safe overvoltage margin for 5V logic interfaces and microcontrollers powered from regulated 3.3V/5V rails downstream of protection stage. |
| Fast response time <5.0ns | Activates within 5 nanoseconds of transient onset - faster than most MCU I/O pin ESD structures, ensuring primary protection role in system-level immunity design. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life compliance for global OEM programs. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery rail in passenger vehicle infotainment head unit exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary bidirectional TVS clamp placed upstream of DC-DC converter input to limit voltage excursion to ≤13.3V during ISO 7637-2 Pulse 5a events. Use Value: Prevents permanent damage to buck controller ICs and maintains system reset integrity by holding rail voltage below 15V during 500W surges. |
Use Scenario: 4–20mA current loop transmitter connected to PLC analog input subjected to EFT bursts in factory automation environment. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across loop supply terminals to shunt EFT energy before it reaches precision op-amps and ADC front-end. Use Value: Maintains measurement accuracy by limiting induced voltage spikes to <13.3V, avoiding saturation or latch-up in instrumentation amplifiers. |
| LED Driver Input Protection | USB-C Port ESD Clamp |
Use Scenario: Constant-current LED driver board in outdoor streetlight exposed to lightning-induced surges on AC input rectifier output. IC Role / Device Role / Timing Role: Secondary TVS stage after MOV, clamping residual transients on DC bus feeding LED string and driver IC. Use Value: Extends lifetime of MOSFET switches and current-sense resistors by capping voltage overshoot to 13.3V during repetitive 10/1000μs events. |
Use Scenario: USB-C receptacle on portable medical monitor where data lines and VBUS must survive ±15kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed on VBUS line to absorb ESD without affecting 5V/9V/15V/20V PD negotiation timing. Use Value: Enables pass/fail compliance with USB-IF ESD test plan while maintaining <1μA leakage to avoid battery drain in standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.0A | Unidirectional; 7.0V VWM, 13.3V VC @ 143A; same DO-214AC package but different footprint and polarity marking. | Requires explicit anode/cathode orientation; unsuitable for symmetric line-to-line protection without redesign. | Select only if unidirectional clamping suffices and PCB layout accommodates polarity-sensitive placement. |
| ON Semiconductor 1.5KE7.0CA | Higher PPK (1500W), larger DO-201AD package (5.6mm x 9.5mm vs DO-15's 2.7mm x 5.2mm); 13.3V VC @ 113A. | Occupies ~3× PCB area; better for high-energy surges but incompatible with space-constrained automotive modules. | Choose when system-level surge threat exceeds 500W and board space allows larger case size. |
Compared with SMAJ7.0A and 1.5KE7.0CA, SA7.0CA uniquely combines AEC-Q101 qualification, DO-15 compactness, and verified 500W bidirectional clamping - making it optimal for automotive body control modules and industrial edge nodes where size, reliability, and polarity-agnostic layout are critical.
Availability
SA7.0CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver input surge suppression, and USB-C VBUS ESD clamping requiring stable component supply and full traceability.
Supply support for SA7.0CA 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 - serving automotive, industrial, and consumer markets since 1979.
The SA Series was developed specifically for AEC-Q101-compliant transient protection in harsh-environment applications, emphasizing low clamping voltage, tight parameter distribution, and extended temperature operation up to +175°C.
FAQ
What is the polarity configuration of SA7.0CA?
The SA7.0CA is a bidirectional TVS diode with symmetrical avalanche characteristics in both directions. Unlike unidirectional variants (e.g., SA7.0), it has no cathode band marking and functions identically regardless of terminal orientation - enabling simplified layout for line-to-line or line-to-ground protection without polarity constraints. This behavior is confirmed in the "Devices for bipolar applications" section of the SA Series datasheet.
Does SA7.0CA meet AEC-Q101 qualification?
Yes, SA7.0CA is AEC-Q101 qualified, as explicitly stated in the "FEATURES" section of the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD - validating its suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of SA7.0CA under surge conditions?
The maximum clamping voltage of SA7.0CA is 13.3 V at 150 A peak pulse current (IPPM), measured under the standard 10/1000 μs double-exponential waveform. This value is specified in the "MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS" table for part number SA7.0A - and applies identically to SA7.0CA per datasheet note indicating electrical equivalence between 'A' and 'CA' suffixes for bipolar types.
Can SA7.0CA replace SA7.0 in an existing design?
No - SA7.0CA cannot directly replace SA7.0 without verification. SA7.0 is unidirectional (cathode-marked), while SA7.0CA is bidirectional (no polarity marking). Substitution requires confirming that the circuit does not rely on directional conduction - e.g., DC-biased rails - and that clamping behavior remains acceptable in both polarities. Layout changes may be needed to remove polarity-dependent routing.
What is the junction capacitance of SA7.0CA at 1MHz and 0V bias?
The junction capacitance of SA7.0CA is not explicitly published in the provided SA Series documentation. Figure 4 ("Typical Junction Capacitance") shows curves for unspecified SA-series parts but omits numerical values or part-specific data. Therefore, CJ cannot be reliably stated for SA7.0CA without access to manufacturer-measured characterization data - and must be measured empirically or sourced from TSC upon request.
SA7.0CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 43A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA7.0CA FAQ
1.How can I place an order for SA7.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.0CA 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 SA7.0CA reliable?
The price and inventory of SA7.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0CA is usually 5 days.
3.What payment methods are accepted for SA7.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.0CA?
SA7.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.0CA 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 SA7.0CA?
For technical support, including SA7.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0CA requirements.
6.How does Aetrix verify that SA7.0CA is sourced from the original manufacturer or authorized distributors?
All SA7.0CA 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 SA7.0CA meets industry standards.
7.What is the process for return or replacement of SA7.0CA?
All SA7.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0CA, 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 SA7.0CA part is unused and in its original packaging.
Return procedure for SA7.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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