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onsemi SA7V5CA
- Part No.:
- SA7V5CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7V5CA.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
SA7V5CA from Fairchild Semiconductor is a bidirectional 500 W transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping ESD and surge transients on data lines and power rails. It features a 7.5 V reverse stand-off voltage (VRWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V clamping voltage (VC) at 38.8 A peak pulse current (IPPM), and operates up to +175 °C junction temperature - used in industrial power supply input protection.
For engineers reviewing the SA7V5CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.55), sub-5 ns response time, and DO-15 through-hole compatibility with legacy board layouts requiring robust 500 W surge handling on 10/1000 μs waveforms.
Technical Context
The SA7V5CA employs a glass-passivated silicon junction optimized for fast transient suppression in bipolar configurations. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It delivers 500 W peak pulse power on standardized 10/1000 μs waveform per JEDEC standards, with low incremental surge resistance ensuring stable clamping under high-current surges. Reverse leakage remains ≤50 μA at VRWM, supporting low-power system integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 500 W - sustains single-event lightning/surge transients per IEC 61000-4-5 Level 4 without failure |
| Reverse Stand-off Voltage (VRWM) | 7.5 V - maximum continuous operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 8.33–9.21 V at 1.0 mA - precise conduction onset threshold for reliable overvoltage triggering |
| Clamping Voltage (VC) | 12.9 V at 38.8 A IPPM - limits downstream voltage stress during full-rated surge event |
| Peak Pulse Current (IPPM) | 38.8 A - maximum non-destructive surge current under standard test waveform |
| Response Time | <5.0 ns - ensures clamping activation before transient energy damages sensitive ICs |
| Junction Temperature Range | −65 °C to +175 °C - supports operation in harsh industrial and automotive under-hood environments |
Pinout & Package
SA7V5CA is housed in a DO-15 axial-leaded package with no cathode band - consistent with bidirectional TVS construction. Leads are tinned copper, rated for 0.375" lead length derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry point in negative half-cycle | Provides symmetrical conduction path during reverse-polarity surges |
| Cathode (Lead 2) | Transient current entry point in positive half-cycle | Enables identical clamping behavior regardless of voltage polarity across device |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure |
| 500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 4 |
| Sub-5 ns response time | Activates before most microcontrollers and interface ICs experience latch-up or gate oxide damage |
| Bidirectional symmetry | Eliminates need for polarity-aware layout; simplifies protection of AC lines, RS-485, CAN, and USB D+/D− |
| Low IR at VRWM | ≤50 μA leakage at 7.5 V enables use in battery-backed or ultra-low-power monitoring circuits |
Applications
| Industrial Power Input Protection | RS-485 Data Line Surge Suppression |
|---|---|
Use Scenario: 24 V DC industrial PLC power entry subjected to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤12.9 V, protecting downstream regulators and controllers from overvoltage stress. |
Use Scenario: Two-wire RS-485 bus in factory automation exposed to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS across differential pair (A–B) and common-mode (A–GND, B–GND). Use Value: Clamps ±38.8 A surges within 5 ns, preserving signal integrity and preventing receiver saturation or damage. |
| Automotive Body Control Module (BCM) Inputs | AC Mains-Fed Smart Meter Front-End |
Use Scenario: 12 V sensor inputs in BCM subject to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Secondary-level protection after fuse and primary TVS, placed near microcontroller GPIO. Use Value: Provides precise 7.5 V stand-off with low clamping ratio, enabling safe interface with 5 V tolerant MCU pins. |
Use Scenario: 230 V AC-to-DC front-end of smart electricity meter exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary clamping stage after MOV, protecting bridge rectifier and controller IC. Use Value: Adds fast-response, low-capacitance (<50 pF) protection that complements high-energy MOVs without slowing AC sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.5A | Same DO-214AC package; 7.5 V VRWM, 12.9 V VC at 38.8 A, but unidirectional - requires dual-device configuration for bipolar protection | Requires two devices (anode-to-rail + cathode-to-rail) to match SA7V5CA's single-device bidirectionality | Select when board space allows dual placement and cost sensitivity favors SMT over axial DO-15 |
| Vishay 1.5KE7.5CA | Higher 1500 W rating, same 7.5 V VRWM and bidirectional DO-15 form factor, but larger body (DO-201AD) and higher clamping (13.4 V) | Used where higher surge margin is required (e.g., outdoor telecom), but may overstress 5 V logic due to higher VC | Select when system must survive repeated 1.5 kW surges; verify 13.4 V clamping is acceptable for protected IC VDD ratings |
Compared with SMAJ7.5A and 1.5KE7.5CA, SA7V5CA uniquely balances compact DO-15 size, true bidirectional operation in one device, and tight 12.9 V clamping - making it optimal for space-constrained industrial controls where polarity-agnostic protection and precise voltage limiting are critical.
Availability
SA7V5CA is available at Aetrix Electronics and suitable for industrial power input protection, RS-485 data line surge suppression, automotive body control module inputs, and AC mains-fed smart meter front-ends requiring stable component supply and long-lifecycle support.
Supply support for SA7V5CA 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 discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed in industrial and automotive systems.
The SA7V5CA belongs to Fairchild's SAxxxC(A) family of 500 W DO-15 TVS diodes, engineered specifically for cost-sensitive, high-reliability transient suppression in power supplies, communication interfaces, and control modules.
FAQ
What is the clamping voltage of SA7V5CA at its rated peak pulse current?
The SA7V5CA has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 38.8 A on the 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SA7V5CA maintains this clamping performance consistently across its qualified temperature range.
Is SA7V5CA unidirectional or bidirectional, and how does that affect PCB layout?
SA7V5CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it clamps symmetrically for both positive and negative transients without polarity orientation constraints. Unlike unidirectional variants, SA7V5CA has no cathode band and can be mounted in either direction - simplifying layout, reducing assembly errors, and enabling direct replacement in AC-coupled or floating signal paths such as RS-485 or CAN bus lines.
What is the maximum operating junction temperature for SA7V5CA?
The SA7V5CA is rated for a maximum operating junction temperature (TJ) of +175 °C, with a storage temperature range of −65 °C to +175 °C. This high-temperature capability supports deployment in under-hood automotive modules, industrial motor drives, and enclosed power supplies where ambient temperatures exceed 100 °C - provided PCB thermal relief and lead length meet the 0.375" derating condition for 1.0 W steady-state dissipation.
How does SA7V5CA compare to SA7V0CA in terms of voltage ratings and application suitability?
SA7V5CA has a 7.5 V reverse stand-off voltage (VRWM) and 8.33–9.21 V breakdown range, while SA7V0CA specifies 7.0 V VRWM and 7.78–8.60 V VBR. The 0.5 V higher stand-off of SA7V5CA reduces leakage in 7–7.4 V nominal systems and improves noise margin against false triggering. SA7V5CA is preferred where system rail tolerances allow tighter clamping control without compromising immunity margin.
Does SA7V5CA meet any specific industry surge immunity standards out of the box?
SA7V5CA's 500 W peak pulse rating on the 10/1000 μs waveform aligns with the energy requirements of IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kV line-to-line) when applied with appropriate series impedance. While the device itself is not certified, its electrical characteristics enable compliant designs in industrial equipment, smart meters, and building automation systems when integrated per standard layout and filtering guidelines.
SA7V5CA 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- 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
SA7V5CA FAQ
1.How can I place an order for SA7V5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7V5CA 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 SA7V5CA reliable?
The price and inventory of SA7V5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7V5CA is usually 5 days.
3.What payment methods are accepted for SA7V5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7V5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7V5CA?
SA7V5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7V5CA 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 SA7V5CA?
For technical support, including SA7V5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7V5CA requirements.
6.How does Aetrix verify that SA7V5CA is sourced from the original manufacturer or authorized distributors?
All SA7V5CA 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 SA7V5CA meets industry standards.
7.What is the process for return or replacement of SA7V5CA?
All SA7V5CA units undergo pre-shipment inspection (PSI). If there is an issue with SA7V5CA, 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 SA7V5CA part is unused and in its original packaging.
Return procedure for SA7V5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7V5CA Tags
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onsemi
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