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Vishay General Semiconductor - Diodes Division SA20CAHE3/54
- Part No.:
- SA20CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA20CAHE3/54.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,818
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Product details
Overview
SA20CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 500 W peak pulse power (10/1000 μs), 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR at 10 mA), 32.4 V maximum clamping voltage (VC) at 15.4 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA20CAHE3/54 datasheet, SA20CAHE3/54 pinout, SA20CAHE3/54 application, or SA20CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, 175 °C junction temperature rating, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 for ESD and surge protection in harsh environments.
Technical Context
The SA20CAHE3/54 operates as a voltage-clamping device using an avalanche breakdown mechanism in both polarities, enabling symmetric transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at 20 V), while the DO-15 package supports manual or automated through-hole assembly with matte tin-plated leads compliant to J-STD-002.
Designed for repetitive surge events up to 0.01% duty cycle, it delivers consistent clamping performance under 10/1000 μs waveform stress, with thermal derating defined from TL = 75 °C and TJ up to 175 °C. The device exhibits a VBR temperature coefficient of +23 mV/°C, enabling predictable drift behavior across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 22.2 V / 24.5 V at 10 mA - Ensures reliable turn-on within tight tolerance for precise overvoltage thresholding |
| VC @ IPPM | 32.4 V at 15.4 A - Limits downstream voltage stress during 500 W transient events |
| PPPM | 500 W (10/1000 μs) - Supports high-energy surge immunity per IEC 61000-4-5 Level 4 |
| IPPM | 15.4 A - Peak current handling capacity defines minimum series impedance required in protected circuit |
| TJ max. | 175 °C - Enables operation in under-hood automotive environments without thermal shutdown |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics including HTOL, TC, and UHAST |
Pinout & Package
SA20CAHE3/54 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body, 0.130–0.138 inch diameter, 1.0 inch minimum lead length, matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient conduction path | Either terminal conducts during overvoltage in either polarity; no cathode band marking required |
| Lead 1 | PCB mounting interface | Through-hole termination supporting ≥275 °C solder dip (10 s) and JESD 22-B106 reliability |
| Lead 2 | PCB mounting interface | Identical to Lead 1; symmetric layout enables flexible board placement without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%), low leakage (<1 μA), and long-term parameter stability under thermal cycling |
| 500 W peak pulse power | Withstands 10/1000 μs surges up to 15.4 A-meets IEC 61000-4-5 Level 4 for industrial and automotive applications |
| AEC-Q101 qualification | Validated for automotive use including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased HAST |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients, reducing stress on downstream ICs like CAN transceivers or microcontrollers |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical systems in automotive and industrial enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail input prior to DC/DC converter. Use Value: Clamps spikes up to 32.4 V at 15.4 A, preventing damage to 36 V-rated regulators and ensuring ASIL-B system robustness. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground on PCB edge connector. Use Value: Sub-100 pF capacitance preserves signal integrity up to 1 MHz while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom Line Interface Protection | Consumer Equipment AC/DC Input Stage |
Use Scenario: Safeguarding RS-485 transceivers on field wiring exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed differential-mode across A/B bus lines with common-mode choke. Use Value: Symmetric clamping maintains signal common-mode range while limiting differential overvoltage to <35 V during 1 kV/μs transients. | Use Scenario: Secondary-side transient suppression on 5–24 V DC outputs of wall adapters and power supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across output capacitor to absorb switching noise and hot-plug spikes. Use Value: 20 V VWM avoids false triggering during normal 24 V nominal operation while clamping >30 V faults within 1 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20AHE3/A | Surface-mount SMA package (DO-214AC), same VWM/VC, lower PPPM (400 W) | Requires SMT reflow process; unsuitable for through-hole legacy designs or high-vibration mechanical retention | Select when board space is constrained and automated assembly is available |
| 1.5KE20CA | Higher PPPM (1500 W), larger DO-201 package, higher VC (36.5 V), non-AEC-Q101 | Better for high-energy surges but lacks automotive qualification and increases board footprint by 40% | Select only for non-automotive industrial applications requiring >1 kW surge margin |
Compared with SMAJ20AHE3/A and 1.5KE20CA, SA20CAHE3/54 uniquely balances AEC-Q101 compliance, DO-15 mechanical ruggedness, and precise 20 V standoff in a cost-effective through-hole format-making it optimal for automotive body control modules and industrial PLC I/O cards where reliability and legacy assembly compatibility are critical.
Availability
SA20CAHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line protection, and consumer power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SA20CAHE3/54 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxCA family targets robust transient suppression in harsh environments-designed specifically for automotive, industrial, and telecom systems needing AEC-Q101-qualified, bidirectional, high-power TVS diodes in standardized axial packages.
FAQ
What is the clamping voltage of SA20CAHE3/54 at its rated peak pulse current?
The SA20CAHE3/54 has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 15.4 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88378) and defines the upper voltage limit imposed on protected circuits during surge events. Maintaining VC below downstream IC absolute maximum ratings is critical-and the SA20CAHE3/54 achieves this while delivering 500 W pulse handling capability.
Is SA20CAHE3/54 suitable for automotive applications?
Yes, SA20CAHE3/54 is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased HAST-required for automotive electronic components. Its DO-15 package, 175 °C maximum junction temperature, and bidirectional clamping make it appropriate for engine control units, body electronics, and infotainment power rails. The HE3 suffix explicitly denotes AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the bidirectional nature of SA20CAHE3/54 affect its circuit implementation?
The bidirectional design of SA20CAHE3/54 eliminates polarity concerns during placement: either lead can connect to line or return, simplifying layout and eliminating risk of reverse installation. It provides symmetrical clamping for both positive and negative transients-ideal for AC-coupled signals, differential buses (e.g., RS-485), or ungrounded power domains. Unlike unidirectional TVS diodes, SA20CAHE3/54 requires no cathode marking and functions identically regardless of voltage polarity across its terminals.
What is the maximum steady-state power dissipation for SA20CAHE3/54?
The SA20CAHE3/54 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 Vishay datasheet. This rating applies to continuous DC or low-frequency reverse leakage conditions-not transient events. In practice, the device spends most time in high-impedance standby mode (<1 μA leakage at 20 V), so actual thermal load is negligible unless subjected to sustained overvoltage.
Does SA20CAHE3/54 have RoHS and REACH compliance documentation?
Yes, SA20CAHE3/54 carries the HE3 suffix, indicating RoHS-compliant construction (per EU Directive 2011/65/EU) and material compliance with Vishay's standard substance restrictions, including REACH SVHC screening. The "Base P/NHE3" designation in the datasheet confirms AEC-Q101 qualification and RoHS compliance. Full declarations-including substance concentration data and conflict minerals reporting-are available via Vishay's official product portal using the SA20CAHE3/54 part number.
SA20CAHE3/54 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SA20CAHE3/54 FAQ
1.How can I place an order for SA20CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA20CAHE3/54 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 SA20CAHE3/54 reliable?
The price and inventory of SA20CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA20CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA20CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA20CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA20CAHE3/54?
SA20CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA20CAHE3/54 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 SA20CAHE3/54?
For technical support, including SA20CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA20CAHE3/54 requirements.
6.How does Aetrix verify that SA20CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA20CAHE3/54 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 SA20CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA20CAHE3/54?
All SA20CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA20CAHE3/54, 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 SA20CAHE3/54 part is unused and in its original packaging.
Return procedure for SA20CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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