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Taiwan Semiconductor Corporation SA7.0C
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- Part No.:
- SA7.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.0C.pdf
- Description:
- 500W, 8.6V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,814
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Product details
Overview
SA7.0C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 7.0V working stand-off voltage (VWM), 7.78–9.51V breakdown voltage (VBR @ 10mA), and 13.3V clamping voltage (VC) at 150A peak pulse current - designed for automotive-grade ESD and load-dump protection in 12V power rails.
For engineers reviewing the SA7.0C datasheet, SA7.0C pinout, SA7.0C application, or SA7.0C equivalent, this device is selected for high-reliability DC power line surge suppression where fast response (<1.0ps), low leakage (<1μA @ 10V), and AEC-Q101 qualification are required in lighting control, body electronics, and sensor interface circuits.
Technical Context
The SA7.0C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (7.78–9.51V) to clamp transients to ≤13.3V at 150A (10/1000μs waveform). Its low dynamic impedance ensures stable clamping under fast-rising EFT pulses.
Designed for automotive environments, it supports junction temperatures from –55°C to +175°C, features pure tin-plated leads compliant with J-STD-002, and meets JESD201 Class 2 whisker resistance - enabling use in under-hood modules without derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets minimum system operating margin before clamping. |
| VBR @ IT=10mA | 7.78–9.51 V - Breakdown threshold range; defines precise turn-on point for transient suppression in 12V automotive systems. |
| VC @ IPPM=150A | 13.3 V - Clamped voltage during 500W surge; limits downstream IC stress to safe levels below typical 16V absolute max ratings. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; validates robustness against ISO 7637-2 Pulse 1 & 2a load-dump events. |
| IR @ VWM | <1 μA - Reverse leakage at 7.0V; ensures negligible standby current drain in always-on vehicle modules. |
| TJ MAX | +175 °C - Maximum junction temperature; enables placement near heat sources (e.g., engine control units) without thermal shutdown. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass; compatible with legacy through-hole assembly and reflow-compatible lead finish. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by band-marked end; anode is unmarked lead. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 12V rail); conducts surge current to ground when VREV > VBR. |
| Anode (unmarked end) | Reference / ground return path | Typically tied to chassis or system ground; completes low-impedance surge path with minimal trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
| Clamping voltage ≤13.3V @ 150A | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain within safe operating area during ISO 7637-2 Pulse 5a load dump. |
| Response time <1.0ps | Activates before most semiconductor junctions experience overvoltage damage - critical for protecting high-speed signal lines and precision analog inputs. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; supports green manufacturing and end-of-life recycling requirements. |
| Low IR <1μA @ 10V | Minimizes quiescent current in battery-backed systems (e.g., telematics, alarm controllers), extending sleep-mode runtime. |
Applications
| Automotive Lighting Control | Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump transients during headlight switching in 12V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp ISO 7637-2 Pulse 5a surges up to 110V/500ms. Use Value: Limits clamped voltage to 13.3V, preventing latch-up or gate oxide rupture in 16V-rated drivers while maintaining <1μA leakage during idle. |
Use Scenario: Safeguarding microcontroller power supply pins and LIN transceiver inputs against ESD (IEC 61000-4-2 ±8kV contact) and electrical fast transients in door module PCBs. IC Role / Device Role: Primary front-end TVS on 12V input rail upstream of LDO regulators and local decoupling. Use Value: Sub-1ps response captures nanosecond-scale EFT bursts before they propagate into sensitive logic; DO-15 footprint allows placement adjacent to connector entry points. |
| Engine Control Unit (ECU) Sensor Interface | Industrial 12V DC Power Distribution |
|
Use Scenario: Shielding analog front-end circuitry (e.g., oxygen sensor amplifiers) from inductive kickback generated by solenoid actuation in fuel injection systems. IC Role / Device Role: Localized TVS mounted directly at sensor harness connector to suppress 100V/100ns spikes induced by relay coil de-energization. Use Value: 13.3V clamping prevents amplifier saturation and ADC offset errors; –55°C to +175°C operation ensures reliability across full engine bay thermal range. |
Use Scenario: Providing primary surge immunity for DIN-rail-mounted 12V DC power supplies feeding PLC I/O modules in factory automation cabinets. IC Role / Device Role: Bulk transient suppressor on main input bus, coordinated with upstream MOVs and downstream TVS arrays for staged protection. Use Value: 500W rating handles repetitive surges from motor drive switching noise; DO-15 axial form factor simplifies manual replacement during field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.0A | Same DO-214AC package; slightly higher VBR min (7.78V vs. 7.78V), identical VC (13.3V), but rated for 400W only. | Lower PPK reduces margin for ISO 7637-2 Pulse 5a compliance in high-energy systems; suitable for non-critical 12V accessories. | Select SMAJ7.0A only if system-level testing confirms 400W suffices and board space requires SMD instead of axial DO-15. |
| ON Semiconductor 1.5SMC7.0A | DO-214AB package; same VWM (7.0V), VBR (7.78–9.51V), and VC (13.3V), but rated for 1500W peak power. | Higher PPK enables use in 24V commercial vehicle systems; larger SMC package requires different layout and thermal relief design. | Choose 1.5SMC7.0A when upgrading to 24V architecture or when additional surge margin is needed beyond SA7.0C's 500W rating. |
Compared with SMAJ7.0A and 1.5SMC7.0A, the SA7.0C delivers optimal balance of AEC-Q101 qualification, DO-15 through-hole compatibility, and verified 500W automotive surge capability - making it the preferred choice for cost-sensitive, thermally constrained 12V automotive modules requiring proven field reliability.
Availability
SA7.0C is available at Aetrix Electronics and suitable for automotive lighting control, body electronics, and industrial 12V DC power distribution requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SA7.0C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems - emphasizing low clamping voltage, fast response, and high-temperature reliability in harsh under-hood environments.
FAQ
What is the polarity configuration of the SA7.0C?
The SA7.0C is a unidirectional TVS diode with cathode indicated by a band on the DO-204AC (DO-15) package. It conducts only when reverse-biased above its breakdown voltage (7.78–9.51V), making it suitable for DC power line protection where polarity is fixed - unlike bidirectional variants like SA7.0CA which protect AC or reversible signal lines.
Does the SA7.0C meet AEC-Q101 qualification?
Yes, the SA7.0C is AEC-Q101 qualified, as confirmed in the SA Series datasheet (Version L2105). This certification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of the SA7.0C under surge conditions?
The SA7.0C has a maximum clamping voltage (VC) of 13.3 V at 150 A peak pulse current (10/1000μs waveform), as specified in the "Maximum Ratings and Electrical Characteristics" table. This value ensures downstream components with 16V absolute maximum ratings remain within safe operating limits during standardized surge events.
Can the SA7.0C be used in 24V automotive systems?
No - the SA7.0C is optimized for 12V nominal systems. Its 7.0V working stand-off voltage (VWM) provides insufficient margin against normal 24V rail fluctuations and transients; using it in 24V applications risks premature conduction and thermal failure. For 24V systems, select SA15C (15V VWM) or SA24C (24V VWM) variants from the same SA Series.
What is the junction temperature range for the SA7.0C?
The SA7.0C operates across a junction temperature range of –55°C to +175°C, as stated in the Absolute Maximum Ratings table. This wide range supports deployment in extreme environments such as engine compartments, transmission control units, and industrial enclosures without derating or thermal shutdown.
SA7.0C 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:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SA7.0C FAQ
1.How can I place an order for SA7.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.0C 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 SA7.0C reliable?
The price and inventory of SA7.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0C is usually 5 days.
3.What payment methods are accepted for SA7.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.0C?
SA7.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.0C 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 SA7.0C?
For technical support, including SA7.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0C requirements.
6.How does Aetrix verify that SA7.0C is sourced from the original manufacturer or authorized distributors?
All SA7.0C 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 SA7.0C meets industry standards.
7.What is the process for return or replacement of SA7.0C?
All SA7.0C units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0C, 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 SA7.0C part is unused and in its original packaging.
Return procedure for SA7.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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