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onsemi SA7V0CA
- Part No.:
- SA7V0CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7V0CA.pdf
- Description:
- TVS DIODE 7VWM 12VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:8,509
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Product details
Overview
SA7V0CA from Fairchild Semiconductor is a 500 W bidirectional transient voltage suppressor (TVS) in DO-15 package, designed for clamping ESD and surge events on data lines and power rails. It features a 7.0 V reverse stand-off voltage (VRWM), 7.78–8.60 V breakdown voltage (VBR), 12.0 V clamping voltage at 41.7 A peak pulse current (IPPM), and operates up to +175°C junction temperature - commonly deployed in industrial power supply input protection.
For engineers reviewing the SA7V0CA datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, DO-15 mechanical interface details, and direct alternatives with documented parameter divergence.
Technical Context
The SA7V0CA is a glass-passivated, bipolar junction TVS diode optimized for unidirectional or bidirectional surge suppression on AC-coupled or floating signal paths. Its low incremental surge resistance and sub-5 ns response time enable effective clamping of fast transients such as IEC 61000-4-5 surge events and ESD per IEC 61000-4-2.
It exhibits symmetrical electrical characteristics in both directions due to its CA suffix designation, with reverse leakage ≤150 µA at VRWM = 7.0 V and clamping performance validated on the standard 10/1000 µs waveform. Thermal stability is maintained via a 175°C maximum junction temperature rating and defined power derating above 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 500 W on 10/1000 µs waveform - supports high-energy surge immunity without thermal runaway |
| Reverse Stand-off Voltage | 7.0 V - defines maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage | 7.78–8.60 V at 10 mA - ensures reliable turn-on margin above VRWM for robust overvoltage detection |
| Clamping Voltage | 12.0 V at 41.7 A IPPM - limits downstream voltage stress during worst-case surge conditions |
| Peak Pulse Current | 41.7 A on 10/1000 µs waveform - quantifies maximum transient energy absorption capability |
| Reverse Leakage | ≤150 µA at 7.0 V - minimizes standby power loss and avoids false triggering in low-power circuits |
| Junction Temperature | +175°C max - enables use in high-ambient environments like motor drives and industrial controls |
Pinout & Package
SA7V0CA uses the industry-standard DO-15 axial-leaded package with no cathode band (bidirectional configuration). Leads are tinned copper, 0.375" length, rated for 1.0 W steady-state dissipation at 75°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Surge current entry point in one polarity | Functions identically to Cathode under reverse bias - symmetric conduction enables bidirectional clamping |
| Cathode (Lead 2) | Surge current entry point in opposite polarity | No color band marking; terminals interchangeable - no polarity dependency in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low IR over temperature and long-term operation in humid or contaminated environments |
| Sub-5 ns response time | Enables clamping before transient energy couples into sensitive downstream ICs (e.g., RS-485 transceivers) |
| Symmetrical bidirectional clamping | Eliminates need for external series diodes or polarity-aware placement in AC or floating interfaces |
| Low incremental surge resistance | Reduces voltage overshoot during high di/dt events - critical for protecting MOSFET gates and microcontroller I/O |
| JEDEC-compliant IFSM rating | 70 A non-repetitive forward surge withstand - supports integration into rectifier-fed power inputs without fusing |
Applications
| Industrial Motor Drives | AC-DC Power Supply Inputs |
|---|---|
Use Scenario: Protection of rectifier bridge outputs and DC bus against line-to-line surges and switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across bulk capacitor or between phases. Use Value: Limits transient voltage to ≤12.0 V during 41.7 A surges, preventing overvoltage failure of electrolytic capacitors and gate drivers. |
Use Scenario: Input-stage surge suppression on universal-input (85–265 VAC) SMPS front-ends. IC Role / Device Role / Timing Role: Primary-level TVS connected across AC input or after bridge rectifier. Use Value: Absorbs 500 W IEC 61000-4-5 combination wave surges while maintaining <150 µA leakage at 7 V standoff. |
| RS-485/422 Data Lines | Automotive Body Control Modules |
Use Scenario: Differential pair protection on industrial fieldbus nodes exposed to cable-induced transients. IC Role / Device Role / Timing Role: Bidirectional clamp across A/B lines referenced to ground or common-mode node. Use Value: Sub-5 ns response prevents data corruption during 4 kV ESD contact discharge per IEC 61000-4-2. |
Use Scenario: 12 V battery rail protection in BCMs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on main power input before DC-DC converters. Use Value: Withstands 175°C junction temperature and clamps load dump spikes to ≤12.0 V at 41.7 A peak. |
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; 7.0 V VRWM, 12.0 V VC @ 41.5 A - nearly identical clamping but 400 W PPPM rating | Lower peak power handling reduces margin for repetitive surges in high-durability industrial designs | Select when footprint compatibility with SMC/SMA packages is required and 400 W surge rating suffices |
| Vishay 1.5KE7.5CA | Higher VRWM (7.5 V), higher VBR (8.33–9.21 V), same DO-15 package - 1.5 kW PPPM but larger case and higher capacitance | Greater clamping voltage (13.6 V) increases risk of downstream IC overvoltage during marginal surges | Prefer where higher surge energy tolerance is mandatory and board space allows larger axial package |
Compared with SA7V0CA, SMAJ7.0A offers identical clamping voltage but reduced surge endurance, while 1.5KE7.5CA trades tighter voltage control for higher power capacity and looser clamping - requiring careful trade-off analysis based on system-level surge test requirements and layout constraints.
Availability
SA7V0CA is available at Aetrix Electronics and suitable for industrial motor drives, AC-DC power supply inputs, RS-485/422 data lines, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for SA7V0CA 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
Fairchild Semiconductor was a leading designer of high-performance analog and power semiconductors, acquired by ON Semiconductor in 2016; legacy products maintain full datasheet compliance and industrial qualification.
The SA7V0CA belongs to Fairchild's SAxV0(C)A family of 500 W DO-15 TVS diodes engineered specifically for cost-sensitive, high-reliability surge protection in power conversion, industrial automation, and transportation systems.
FAQ
What is the clamping voltage of SA7V0CA at its rated peak pulse current?
The SA7V0CA has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 41.7 A on the standard 10/1000 µs waveform. This value is measured under controlled lab conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SA7V0CA maintains this clamping performance across its full operating temperature range up to +175°C junction temperature.
Is SA7V0CA unidirectional or bidirectional, and how does that affect PCB layout?
SA7V0CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping in both polarities without cathode marking. This eliminates polarity sensitivity during placement - either lead may connect to line or return. Unlike unidirectional variants (e.g., SA7V0A), SA7V0CA requires no orientation check during automated assembly and supports AC-coupled or floating signal paths without additional diodes.
What is the maximum junction temperature rating for SA7V0CA, and why does it matter in thermal design?
The SA7V0CA is rated for a maximum junction temperature (TJ) of +175°C, significantly higher than standard silicon diodes. This enables reliable operation in high-ambient environments such as enclosed motor drive enclosures or under-hood automotive locations. When designing heatsinking or airflow, engineers must ensure the calculated TJ - derived from ambient temperature, power dissipation, and thermal resistance - remains below this limit to prevent parametric shift or premature failure of the SA7V0CA.
How does the 500 W peak pulse power rating of SA7V0CA compare to similar DO-15 TVS diodes?
The SA7V0CA's 500 W peak pulse power rating on the 10/1000 µs waveform places it among the highest-rated DO-15 packaged TVS devices. Most competing DO-15 parts (e.g., SMAJ series) are limited to 400 W, while higher-power alternatives (e.g., 1.5KE series) require larger DO-201AD packages. This makes SA7V0CA ideal where board space is constrained but surge immunity must meet IEC 61000-4-5 Level 3 (2 kV line-earth) without compromising footprint.
Can SA7V0CA be used in place of SA7V0A in an existing design?
No - SA7V0CA and SA7V0A are not interchangeable without circuit review. SA7V0A is unidirectional (cathode-banded, DC-biased clamping only), while SA7V0CA is bidirectional (no band, symmetrical clamping). Substituting SA7V0CA for SA7V0A in a DC-coupled rail may cause unintended conduction or increased leakage. Conversely, replacing SA7V0CA with SA7V0A in an AC or floating path removes half-cycle protection. Always verify polarity requirements before substituting SA7V0CA.
SA7V0CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 41.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
SA7V0CA FAQ
1.How can I place an order for SA7V0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7V0CA 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 SA7V0CA reliable?
The price and inventory of SA7V0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7V0CA is usually 5 days.
3.What payment methods are accepted for SA7V0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7V0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7V0CA?
SA7V0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7V0CA 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 SA7V0CA?
For technical support, including SA7V0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7V0CA requirements.
6.How does Aetrix verify that SA7V0CA is sourced from the original manufacturer or authorized distributors?
All SA7V0CA 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 SA7V0CA meets industry standards.
7.What is the process for return or replacement of SA7V0CA?
All SA7V0CA units undergo pre-shipment inspection (PSI). If there is an issue with SA7V0CA, 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 SA7V0CA part is unused and in its original packaging.
Return procedure for SA7V0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7V0CA Tags
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