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Vishay General Semiconductor - Diodes Division SA20C-E3/54
- Part No.:
- SA20C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA20C-E3/54.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,744
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Product details
Overview
SA20C-E3/54 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 10 mA, 500 W peak pulse power (10/1000 µs), 32.4 V maximum clamping voltage (VC) at 15.4 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA20C-E3/54 datasheet, SA20C-E3/54 pinout, SA20C-E3/54 application, or SA20C-E3/54 equivalent, this device serves as a robust, RoHS-compliant transient protection solution for bidirectional signal paths in automotive sensor interfaces, industrial I/O modules, and telecom line cards where fast response (<1 ns), low clamping ratio, and stable junction temperature up to +175 °C are required.
Technical Context
The SA20C-E3/54 operates as a symmetrical avalanche diode with identical electrical characteristics in both directions, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable leakage performance and repeatable breakdown behavior under repetitive surge stress.
It delivers 500 W peak pulse power per the 10/1000 µs waveform standard, with a maximum clamping voltage of 32.4 V at 15.4 A IPPM and a low incremental surge resistance that minimizes voltage overshoot during ESD or lightning-induced transients. The device is rated for continuous power dissipation of 3.0 W on an infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum reverse working voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR (min/max) | 22.2 V / 24.5 V at 10 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 32.4 V at 15.4 A - Clamping voltage limits downstream component stress during 500 W transient surges. |
| PPPM | 500 W - Peak pulse power handling capability per 10/1000 µs waveform supports IEC 61000-4-5 Level 4 compliance. |
| ID @ VWM | 1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +175 °C - High junction temperature rating enables use in under-hood automotive and high-ambient industrial environments. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with matte tin-plated leads, UL 94 V-0 molding compound. |
Pinout & Package
SA20C-E3/54 is a two-terminal bi-directional TVS diode in DO-204AC (DO-15) package. No polarity marking is present on the body, as electrical behavior is identical in both directions. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path terminal | Either lead conducts avalanche current during positive or negative overvoltage; no functional distinction between terminals. |
| Case (body) | Non-electrical mechanical interface | Molded epoxy case provides mechanical protection and UL 94 V-0 flame resistance; no thermal or electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 surge events without derating in typical PCB layouts. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage margin required for protected ICs, enabling tighter design margins for 24 V systems. |
| RoHS-compliant, E3 suffix | Meets JESD 201 Class 1A whisker resistance and EU Directive 2011/65/EU for commercial and automotive supply chains. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pair or supply rail to limit transient excursions. Use Value: Withstand 500 W surges while maintaining clamping below 33 V ensures compatibility with 3.3 V/5 V logic interfaces and prevents latch-up in protected ASICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting induced surges before they reach precision op-amps and ADC front-ends. Use Value: 1.0 µA leakage at 20 V avoids loading of high-impedance current-sense resistors; DO-15 footprint allows direct replacement of legacy protectors. |
| Telecom Line Card Protection | Consumer Power Adapter EMI Filter |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails and data lines in PoE-powered switches. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp absorbing coupled lightning surges and EFT bursts on isolated DC supplies. Use Value: 32.4 V clamping at 15.4 A enables coordination with upstream MOVs and ensures <100 ns response time meets GR-1089-CORE requirements. |
Use Scenario: Supplementing X/Y-capacitor filtering in AC-DC adapters to suppress differential-mode surges entering via mains input. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) bi-directional TVS placed across bridge rectifier output to clamp switching spikes. Use Value: 20 V VWM aligns with 24 V DC bus ratings; DO-15 axial package fits standard through-hole filter board layouts without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (20 V), lower PPPM (400 W), SMA package (surface-mount), higher VC (34.0 V). | Preferred for space-constrained PCBs; less suitable for high-energy surges requiring full 500 W headroom. | Select SMAJ20CA when board area is limited and surge energy remains within IEC 61000-4-5 Level 3. |
| 1.5KE20CA | Same VWM (20 V), higher PPPM (1500 W), DO-201 package (larger axial), higher VC (36.0 V), slower response due to larger junction capacitance. | Better suited for high-energy industrial mains protection but incompatible with tight automotive layout constraints. | Choose 1.5KE20CA only when system-level testing confirms need for >500 W surge handling and DO-201 mounting is acceptable. |
Compared with SMAJ20CA and 1.5KE20CA, SA20C-E3/54 offers optimal balance of 500 W surge capacity, compact DO-15 footprint, and low 32.4 V clamping-making it the preferred choice for automotive and industrial designs requiring AEC-Q101 validation and proven field reliability without sacrificing board space or clamping performance.
Availability
SA20C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for SA20C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and automotive-grade qualification.
The SAxxC series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for bi-directional transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom infrastructure.
FAQ
What is the polarity configuration of SA20C-E3/54?
SA20C-E3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode marking and functions identically regardless of terminal orientation-ideal for protecting AC-coupled signals, differential buses, or unidirectional rails where polarity reversal risk exists. This eliminates assembly errors and simplifies schematic symbol usage.
Does SA20C-E3/54 meet automotive qualification standards?
Yes, SA20C-E3/54 is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number: 88378, Revision: 18-Sep-12). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness-ensuring suitability for engine control, body electronics, and ADAS applications where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of SA20C-E3/54 at its rated peak pulse current?
The maximum clamping voltage (VC) of SA20C-E3/54 is 32.4 V at 15.4 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream IC voltage margin calculations in protected circuits.
Can SA20C-E3/54 be used in place of a unidirectional TVS like SA20A-E3/54?
No-SA20C-E3/54 is bi-directional and lacks polarity marking, while SA20A-E3/54 is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SA20C-E3/54 is appropriate for AC or floating nodes; SA20A-E3/54 must be used where forward conduction or DC bias direction matters. Interchange alters clamping behavior and may compromise protection.
What packaging and compliance certifications apply to SA20C-E3/54?
SA20C-E3/54 uses the DO-204AC (DO-15) package with matte tin-plated leads, conforms to RoHS Directive 2011/65/EU (E3 suffix), passes JESD 201 Class 1A whisker testing, and features UL 94 V-0 compliant epoxy molding. It is supplied in 13" paper tape and reel (4000 pcs/reel), per ordering code SA20C-E3/54.
SA20C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 14A
- 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)
SA20C-E3/54 FAQ
1.How can I place an order for SA20C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA20C-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 SA20C-E3/54 reliable?
The price and inventory of SA20C-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 SA20C-E3/54 is usually 5 days.
3.What payment methods are accepted for SA20C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA20C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA20C-E3/54?
SA20C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA20C-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 SA20C-E3/54?
For technical support, including SA20C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA20C-E3/54 requirements.
6.How does Aetrix verify that SA20C-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA20C-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 SA20C-E3/54 meets industry standards.
7.What is the process for return or replacement of SA20C-E3/54?
All SA20C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA20C-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 SA20C-E3/54 part is unused and in its original packaging.
Return procedure for SA20C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA20C-E3/54 Tags
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