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Vishay General Semiconductor - Diodes Division SA70CA-E3/54
- Part No.:
- SA70CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA70CA-E3/54.pdf
- Description:
- TVS DIODE 70VWM 113VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,266
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Product details
Overview
SA70CA-E3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor (TVS) 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), and clamps to ≤113 V at 4.4 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces and industrial I/O modules.
For engineers reviewing the SA70CA-E3/54 datasheet, SA70CA-E3/54 pinout, SA70CA-E3/54 application, or SA70CA-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal mapping, AEC-Q101 qualification status, clamping performance curves, and direct alternatives for overvoltage protection design-in.
Technical Context
The SA70CA-E3/54 operates as a symmetrical avalanche diode with identical forward and reverse conduction characteristics, enabling bidirectional surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for repeatable clamping under repetitive transients.
Designed for 10/1000 μs waveform compliance, it delivers 500 W peak pulse power at TA = 25 °C with derating above 25 °C per Fig. 2, and supports operating junction temperatures from –55 °C to +175 °C - meeting AEC-Q101 stress test requirements for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA; defines safe operating margin below clamping threshold |
| VBR (min) | 77.8 V at 1.0 mA - guaranteed avalanche initiation point; ensures predictable turn-on during fast transients |
| VC @ IPPM | 113 V at 4.4 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level |
| PPPM | 500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges |
| TJ max | +175 °C - maximum junction temperature; supports high-ambient deployments in engine control units and motor drives |
| Package | DO-15 (DO-204AC) - industry-standard axial leaded package with 0.242–0.258 inch body length; compatible with legacy through-hole assembly |
Pinout & Package
SA70CA-E3/54 uses a two-terminal DO-15 (DO-204AC) package with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either lead connects to protected line or ground - simplifies PCB layout and eliminates orientation errors |
| Lead 1 / Lead 2 | Current path for surge energy diversion | Both leads conduct identically in either direction; must be routed with low-inductance traces to minimize clamping overshoot during fast transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures ±5 % VBR tolerance and stable leakage (<1.0 μA at VWM) across –55 °C to +175 °C operating range |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in industrial control systems without derating |
| AEC-Q101 qualification | Validated for automotive applications including engine management sensors, body control modules, and ADAS camera interfaces |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation essential for safety-critical automotive and industrial enclosures |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground to shunt transient energy before IC input stages. Use Value: Clamps 10/1000 μs surges to ≤113 V while maintaining <1.0 μA leakage at 70 V - preserving signal integrity and preventing false triggering in 12 V/24 V systems. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against inductive switching spikes from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side wiring, installed upstream of optocoupler isolation barriers. Use Value: Withstands repetitive 500 W pulses at 0.01 % duty cycle - enabling reliable operation in factory automation environments with frequent actuator cycling. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY interface circuits (e.g., PoE injectors) from lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) primary protection to limit let-through voltage to PHY ICs. Use Value: Fast response time and low clamping voltage (113 V) prevent damage to 100BASE-TX magnetics and transformer-coupled receivers during multi-kV transients. | Use Scenario: Suppressing line-voltage surges and switching noise on AC/DC adapter primary-side rectifier outputs feeding downstream DC-DC converters. IC Role / Device Role / Timing Role: Bidirectional clamp across bulk capacitor terminals to absorb ringing and transient energy from MOSFET switching. Use Value: DO-15 package allows direct mounting on high-voltage nodes; 175 °C TJ rating ensures reliability under sustained thermal stress in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA | Surface-mount SMB package (vs. through-hole DO-15); same VWM = 70 V, VC = 113 V, PPPM = 600 W | Requires PCB redesign for SMT placement; better suited for space-constrained consumer electronics vs. industrial through-hole boards | Select SMBJ70CA when board real estate is limited and automated SMT assembly is available. |
| 1.5KE70CA | Higher PPPM = 1500 W, larger DO-204AL (DO-41) package; VC = 115 V at 13.0 A | Delivers higher surge margin for heavy industrial equipment but requires larger footprint and higher cost per unit | Choose 1.5KE70CA where IEC 61000-4-5 Level 5 (6 kV) immunity is mandated and board space permits larger case. |
Compared with SMBJ70CA and 1.5KE70CA, the SA70CA-E3/54 provides optimal balance of proven DO-15 reliability, AEC-Q101 qualification, and 500 W surge capacity for cost-sensitive automotive and industrial designs requiring through-hole assembly.
Availability
SA70CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SA70CA-E3/54 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 protection devices with emphasis on reliability, AEC-Q101 qualification, and high-volume manufacturability.
The SAxxCA series is engineered specifically for bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where symmetrical clamping, high-temperature operation, and repeatable surge performance are mandatory.
FAQ
What is the clamping voltage of SA70CA-E3/54 at its rated peak pulse current?
The SA70CA-E3/54 clamps to a maximum of 113 V at its peak pulse current of 4.4 A under a 10/1000 μs waveform. This value is measured per Figure 9 in the Vishay datasheet 88378 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SA70CA-E3/54 suitable for automotive applications?
Yes, SA70CA-E3/54 is AEC-Q101 qualified and explicitly listed in Vishay's documentation as meeting automotive stress test requirements. Its –55 °C to +175 °C operating range, glass-passivated junction, and DO-15 mechanical robustness make it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal and vibration stress is essential.
Does SA70CA-E3/54 have polarity markings on the package?
No, SA70CA-E3/54 has no polarity marking because it is a bidirectional TVS diode. The DO-15 package features symmetrical terminals - both leads function identically in either direction - eliminating orientation errors during manual or automated assembly and simplifying schematic symbol usage.
What is the maximum steady-state power dissipation for SA70CA-E3/54?
The SA70CA-E3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in the datasheet. This rating governs continuous power handling in non-transient conditions and must be derated linearly above 75 °C lead temperature.
How does SA70CA-E3/54 differ from unidirectional SA70A-E3/54?
The SA70CA-E3/54 is bidirectional with symmetrical VBR in both directions (77.8–86.0 V), while SA70A-E3/54 is unidirectional with cathode marking and conducts only in reverse bias. SA70CA-E3/54 replaces two unidirectional devices in AC-coupled or floating-line applications - reducing BOM count and PCB area without compromising protection level.
SA70CA-E3/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA70CA-E3/54 FAQ
1.How can I place an order for SA70CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA70CA-E3/54 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 SA70CA-E3/54 reliable?
The price and inventory of SA70CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA70CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA70CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA70CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA70CA-E3/54?
SA70CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA70CA-E3/54 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 SA70CA-E3/54?
For technical support, including SA70CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA70CA-E3/54 requirements.
6.How does Aetrix verify that SA70CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA70CA-E3/54 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 SA70CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA70CA-E3/54?
All SA70CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA70CA-E3/54, 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 SA70CA-E3/54 part is unused and in its original packaging.
Return procedure for SA70CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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