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Vishay General Semiconductor - Diodes Division SA7.0CAHE3/54
- Part No.:
- SA7.0CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.0CAHE3/54.pdf
- Description:
- TVS DIODE 7VWM 12VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,323
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Product details
Overview
SA7.0CAHE3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 500 W peak pulse power (10/1000 μs), 41.7 A peak pulse current (IPPM), and 12.0 V maximum clamping voltage (VC) - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SA7.0CAHE3/54 datasheet, SA7.0CAHE3/54 pinout, SA7.0CAHE3/54 application, or SA7.0CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-15 mechanical compatibility, thermal derating above 25 °C, and compliance with IEC 61000-4-5 surge immunity requirements.
Technical Context
The SA7.0CAHE3/54 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
It is rated for 500 W peak pulse power under 10/1000 μs waveform with 0.01 % duty cycle, and supports continuous power dissipation of 3.0 W on infinite heatsink at TL = 75 °C. Junction temperature range spans −55 °C to +175 °C, and it meets AEC-Q101 stress testing for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum reverse stand-off voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - ensures reliable avalanche initiation across manufacturing lot and temperature |
| VC @ IPPM | 12.0 V - clamping voltage at 41.7 A peak pulse; determines maximum stress imposed on protected circuitry |
| PPPM | 500 W - peak transient energy handling capacity per 10/1000 μs waveform; validates robustness against lightning surges |
| ID @ VWM | 600 μA - reverse leakage at rated stand-off; low enough to avoid interference in high-impedance sensor lines |
| TJ max. | +175 °C - extended junction temperature rating enables use in engine control units and motor drives |
| AEC-Q101 | Qualified - confirms reliability for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
SA7.0CAHE3/54 is housed in DO-15 (DO-204AC) axial-leaded package with matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. No polarity marking; bidirectional operation eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry path (negative half-cycle) | Conducts surge current during negative voltage excursions; symmetrical with cathode due to bidirectional design |
| Cathode (Lead 2) | Transient current entry path (positive half-cycle) | Conducts surge current during positive voltage excursions; functionally identical to anode in CA-series devices |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables <1 ns response time and stable avalanche characteristics over lifetime and temperature |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge protection without external series impedance |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics with zero defects target |
| DO-15 mechanical form factor | Ensures drop-in replacement for legacy TVS diodes in existing PCB footprints and automated assembly lines |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and transportation equipment |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller GPIO and CAN transceiver pins from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt surge energy before reaching sensitive logic. Use Value: With 12.0 V clamping voltage and 175 °C max junction temperature, SA7.0CAHE3/54 prevents latch-up and gate oxide damage in 5 V and 3.3 V automotive MCUs. | Use Scenario: Safeguarding 24 V DC digital input circuits against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppression device across input terminals, working in conjunction with series current-limiting resistor. Use Value: 7.0 V stand-off allows clean detection of valid 24 V logic high while clamping >100 V transients to safe levels for optocoupler input stages. |
| Consumer Appliance Motor Drive Board | Telecom Base Station Sensor Interface |
Use Scenario: Shielding MCU analog inputs and Hall-effect sensor outputs from brush-commutator noise and PWM switching spikes. IC Role / Device Role / Timing Role: Localized TVS at sensor signal trace origin, minimizing loop area and inductive coupling. Use Value: Low 600 μA leakage at 7.0 V ensures minimal offset error in 12-bit ADC measurements; DO-15 footprint simplifies layout reuse. | Use Scenario: Protecting RS-485 transceiver data lines from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional line-to-line and line-to-ground clamping device mounted at board edge near connector. Use Value: Symmetrical 7.78–8.60 V VBR and 12.0 V VC ensure balanced clamping on differential pairs, preserving signal integrity during 1 kV surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A-E3/52 | Unidirectional; 7.0 V VWM but requires polarity-aware layout; SMA package (smaller, surface-mount) | Limited to single-polarity protection; not suitable where AC-coupled or floating signals require bidirectional clamping | Select only if board space constraints mandate SMD and system topology permits unidirectional protection |
| P6SMB7.0CA | Same DO-15 package and bidirectional function; 7.0 V VWM, but 12.5 V VC at 43.3 A IPPM (slightly higher clamping) | Marginally higher clamping voltage may affect 3.3 V rail protection; otherwise direct mechanical and functional substitute | Valid alternative when SA7.0CAHE3/54 is unavailable; verify VC margin against downstream IC absolute maximum ratings |
Compared with SMAJ7.0A-E3/52 and P6SMB7.0CA, SA7.0CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and precise 12.0 V clamping - making it optimal for automotive and industrial designs requiring proven reliability and legacy footprint support.
Availability
SA7.0CAHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC input modules, and consumer appliance motor drive boards requiring stable component supply and long-term lifecycle assurance.
Supply support for SA7.0CAHE3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and transient protection devices with emphasis on reliability and automotive-grade performance.
The SAxxCA series is part of Vishay's TransZORB® TVS portfolio, engineered specifically for robust, bidirectional overvoltage protection in harsh environments including automotive, industrial automation, and telecom infrastructure.
FAQ
What is the clamping voltage of SA7.0CAHE3/54 and how does it protect downstream circuitry?
The SA7.0CAHE3/54 has a maximum clamping voltage (VC) of 12.0 V at 41.7 A peak pulse current (10/1000 μs waveform). This value represents the highest voltage that will appear across the protected line during a surge event. By limiting transient voltage to ≤12.0 V, the SA7.0CAHE3/54 ensures that connected 5 V or 3.3 V ICs remain within their absolute maximum input voltage ratings, preventing permanent damage from overvoltage stress.
Is SA7.0CAHE3/54 suitable for automotive applications?
Yes, SA7.0CAHE3/54 is AEC-Q101 qualified and rated for junction temperatures up to +175 °C, making it suitable for under-hood automotive applications such as engine control units, body control modules, and ADAS sensor interfaces. Its bidirectional clamping behavior and DO-15 package support robust protection against load dump, jump start, and alternator ripple transients commonly encountered in 12 V vehicle electrical systems.
How does the bidirectional nature of SA7.0CAHE3/54 affect its PCB layout?
The SA7.0CAHE3/54 has no polarity marking and functions identically in both directions, eliminating orientation sensitivity during placement. Unlike unidirectional TVS diodes, it can be installed in either direction across a differential pair or AC-coupled signal line without affecting performance. This simplifies PCB layout, reduces assembly errors, and supports compact routing in space-constrained sensor or communication interfaces.
What is the meaning of the "HE3/54" suffix in SA7.0CAHE3/54?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/54" denotes packaging in 13-inch paper tape and reel with 4000 units per reel. This full ordering code identifies the exact variant meeting automotive reliability standards and surface-mount assembly compatibility, distinguishing it from commercial-grade "E3" variants.
Can SA7.0CAHE3/54 replace SA7.0A in an existing design?
No - SA7.0CAHE3/54 is bidirectional while SA7.0A is unidirectional. Replacing SA7.0A with SA7.0CAHE3/54 may cause unintended conduction in DC-biased circuits due to lack of polarity enforcement. The SA7.0CAHE3/54 should only replace other CA-suffix parts (e.g., SA7.0CA) or verified bidirectional equivalents; always validate clamping behavior and leakage in the target application before substitution.
SA7.0CAHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- 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):
- 41.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA7.0CAHE3/54 FAQ
1.How can I place an order for SA7.0CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.0CAHE3/54 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 SA7.0CAHE3/54 reliable?
The price and inventory of SA7.0CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA7.0CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.0CAHE3/54?
SA7.0CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.0CAHE3/54 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 SA7.0CAHE3/54?
For technical support, including SA7.0CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0CAHE3/54 requirements.
6.How does Aetrix verify that SA7.0CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA7.0CAHE3/54 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 SA7.0CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA7.0CAHE3/54?
All SA7.0CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0CAHE3/54, 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 SA7.0CAHE3/54 part is unused and in its original packaging.
Return procedure for SA7.0CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.0CAHE3/54 Tags
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