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Vishay General Semiconductor - Diodes Division SA70CAHE3/54
- Part No.:
- SA70CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA70CAHE3/54.pdf
- Description:
- TVS DIODE 70VWM 113VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,893
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Product details
Overview
SA70CAHE3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor diode in DO-15 package, rated for 70 V standoff voltage (VWM), 86.0 V minimum breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 113 V maximum clamping voltage at 4.4 A peak pulse current, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SA70CAHE3/54 datasheet, SA70CAHE3/54 pinout, SA70CAHE3/54 application, or SA70CAHE3/54 equivalent, this device serves as a robust, RoHS-compliant, bidirectional TVS for clamping inductive switching transients on power rails and signal lines in harsh environments - especially where automotive-grade reliability and low clamping ratio are critical.
Technical Context
The SA70CAHE3/54 operates symmetrically in both directions due to its bidirectional construction, with identical VBR (min/max), IPPM, and VC specifications across polarity. Its glass-passivated junction ensures stable leakage (<1.0 μA at 70 V) and fast response time (<1.0 ns), enabling effective suppression of ESD and lightning-induced surges.
Designed for 10/1000 μs waveform compliance, it delivers 4.4 A peak pulse current (IPPM) while maintaining clamping below 113 V, and supports continuous power dissipation up to 3.0 W on an infinite heatsink at TL = 75 °C. Junction temperature range spans –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 70 V DC rail protection. |
| VBR (min) | 77.8 V - Minimum breakdown voltage at 1 mA test current; guarantees conduction onset above nominal system voltage. |
| VC @ IPPM | 113 V - Clamped voltage at 4.4 A peak pulse; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 500 W - Peak pulse power handling (10/1000 μs); enables survival of high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| IPPM | 4.4 A - Peak pulse current corresponding to VC = 113 V; used to size series impedance for transient energy absorption. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive applications per stress test requirements including HTOL, TC, UHAST, and ESD. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; bidirectional symmetry means no polarity marking - both terminals are electrically identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path terminal | Either lead conducts surge current bidirectionally; no cathode band marking required; PCB layout requires no orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 % typical), low leakage (<1.0 μA), and long-term reliability under thermal cycling. |
| 500 W peak pulse rating (10/1000 μs) | Meets ISO 7637-2 Level III/IV and IEC 61000-4-5 surge immunity requirements for 12 V automotive systems. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect field performance. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical vehicle interior and engine bay applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input rail to shunt surge energy to ground before reaching LDOs or microcontrollers. Use Value: Limits rail overvoltage to ≤113 V during 4.4 A transients, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs exposed to relay coil kickback. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS placed at connector interface to absorb sub-μs inductive spikes without distorting mV-level signals. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <0.5 pF parasitic capacitance to the signal path. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on line-side of isolation transformer, coordinated with secondary-side GDT or MOV for staged protection. Use Value: Withstands repeated 500 W surges without degradation, ensuring >10-year service life in outdoor telecom cabinets. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Mounted directly across motor terminals to clamp back-EMF spikes before they propagate into MCU GPIO or H-bridge drivers. Use Value: Reduces radiated emissions by limiting dV/dt of spikes to <10 V/ns, helping meet CISPR 32 Class B conducted emission limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/52 | Unidirectional; same VWM/VC, but requires correct polarity placement; lower IPPM (4.3 A vs. 4.4 A); SMA package (smaller footprint, lower thermal mass). | Not suitable for AC-coupled or floating-bus applications; limited to DC rails with defined ground reference. | Select when board space is constrained and polarity is fixed; verify layout accommodates unidirectional marking and thermal relief. |
| 1.5KE70CA | Same bidirectional function and VWM, but higher PPPM (1500 W); larger DO-201 package; higher VC (115 V); not AEC-Q101 qualified. | Better suited for industrial mains-connected equipment needing higher surge margin; lacks automotive qualification. | Choose for non-automotive 120/240 VAC systems where 1500 W headroom justifies larger footprint and cost premium. |
Compared with SMAJ70A-E3/52 and 1.5KE70CA, the SA70CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 mechanical robustness, and precise 113 V clamping in a cost-optimized automotive-grade TVS - making it the preferred choice for volume automotive electronics where qualification and consistency outweigh raw power rating.
Availability
SA70CAHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line protection, and consumer appliance motor drive circuits requiring stable component supply and full traceability.
Supply support for SA70CAHE3/54 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, MOSFETs, and passive components with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxxCA series belongs to Vishay's TransZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure - prioritizing low clamping ratio, fast response, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of the SA70CAHE3/54 at its rated peak pulse current?
The SA70CAHE3/54 has a maximum clamping voltage (VC) of 113 V at its rated peak pulse current (IPPM) of 4.4 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SA70CAHE3/54 maintains this clamping performance across its full operating temperature range (–55 °C to +175 °C), ensuring consistent protection in under-hood automotive environments.
Is the SA70CAHE3/54 suitable for automotive applications?
Yes, the SA70CAHE3/54 is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and ESD testing per JESD22-A114. The SA70CAHE3/54 is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces where robust transient immunity and zero-defect field reliability are mandatory.
Does the SA70CAHE3/54 have polarity markings on the package?
No, the SA70CAHE3/54 is a bidirectional TVS diode and carries no polarity marking - the DO-15 package is unmarked because both terminals perform identically in either direction. This eliminates orientation errors during automated assembly and simplifies PCB layout for floating or AC-coupled bus protection. Unlike unidirectional variants (e.g., SA70A), the SA70CAHE3/54 does not feature a cathode band or other visual polarity indicator.
What is the maximum steady-state power dissipation for the SA70CAHE3/54?
The SA70CAHE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at a lead temperature (TL) of 75 °C, per Figure 5 in the Vishay datasheet 88378. This rating applies to continuous DC or low-duty-cycle conditions - not transient suppression. For reliable long-term operation, designers must ensure thermal design keeps junction temperature below 175 °C using appropriate copper pour and via stitching per DO-15 thermal guidelines.
How does the SA70CAHE3/54 differ from the SA70A variant?
The SA70CAHE3/54 is bidirectional (CA suffix), while the SA70A is unidirectional (A suffix). This means the SA70CAHE3/54 clamps transients equally in both directions and has no polarity marking, whereas the SA70A features a cathode band and only clamps in reverse bias. Both share identical VWM (70 V), VBR (77.8–86.0 V), and PPPM (500 W), but the SA70A supports forward surge current (IFSM = 70 A) - a parameter irrelevant for the bidirectional SA70CAHE3/54.
SA70CAHE3/54 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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
SA70CAHE3/54 FAQ
1.How can I place an order for SA70CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA70CAHE3/54 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 SA70CAHE3/54 reliable?
The price and inventory of SA70CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA70CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA70CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA70CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA70CAHE3/54?
SA70CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA70CAHE3/54 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 SA70CAHE3/54?
For technical support, including SA70CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA70CAHE3/54 requirements.
6.How does Aetrix verify that SA70CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA70CAHE3/54 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 SA70CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA70CAHE3/54?
All SA70CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA70CAHE3/54, 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 SA70CAHE3/54 part is unused and in its original packaging.
Return procedure for SA70CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA70CAHE3/54 Tags
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