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Vishay General Semiconductor - Diodes Division SA22CA-E3/54
- Part No.:
- SA22CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22CA-E3/54.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,841
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Product details
Overview
SA22CA-E3/54 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), 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR at 1 mA), 14.1 A peak pulse current (IPPM), and 35.5 V maximum clamping voltage (VC) - used to protect MOSFETs and sensor interfaces in industrial control systems.
For engineers reviewing the SA22CA-E3/54 datasheet, SA22CA-E3/54 pinout, SA22CA-E3/54 application, or SA22CA-E3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, AEC-Q101 qualification status, thermal derating above 25 °C, and clamping performance under 10/1000 μs surge conditions.
Technical Context
The SA22CA-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling symmetric bidirectional clamping without polarity marking. Its breakdown occurs at 24.4–26.9 V (tested at 1 mA), with clamping voltage limited to 35.5 V at 14.1 A peak pulse current - ensuring predictable overvoltage protection across both polarities.
It complies with AEC-Q101 for automotive-grade reliability and supports repetitive surge duty cycles up to 0.01 %, with thermal derating beginning above TA = 25 °C and full power dissipation (3.0 W) rated at TL = 75 °C on infinite heatsink - making it suitable for board-level transient suppression where layout space and thermal margin are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - defines guaranteed avalanche onset range for design margining |
| IPPM | 14.1 A (10/1000 μs) - peak surge current the device safely clamps without failure |
| VC | 35.5 V - maximum voltage seen across terminals during 14.1 A transient, limiting stress on downstream ICs |
| PPPM | 500 W - peak pulse power handling capacity, critical for IEC 61000-4-5 compliance testing |
| TJ max. | 175 °C - maximum junction temperature enabling operation in high-ambient industrial environments |
| Package | DO-15 (DO-204AC) - industry-standard axial leaded package with 0.130" diameter body and 1.0" minimum lead length |
Pinout & Package
SA22CA-E3/54 uses a DO-15 (DO-204AC) axial-leaded package with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional avalanche junction terminal | Either lead may connect to line or ground; symmetrical clamping behavior eliminates orientation dependency during placement |
| Lead 1 | Current path entry (either polarity) | Supports surge conduction in both directions - no cathode band; PCB footprint must accommodate axial symmetry |
| Lead 2 | Current path exit (either polarity) | Matches Lead 1 electrically; mechanical mounting requires 0.375" (9.5 mm) lead length clearance for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial port protection |
| AEC-Q101 qualified | Validated for automotive subsystems including body electronics and sensor modules requiring extended temperature cycling |
| Low incremental clamping resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), protecting sensitive gate drivers |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation essential for safety-critical industrial enclosures |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate driver inputs against inductive kickback from IGBTs in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across driver supply rails to limit voltage excursions during switching transitions. Use Value: Clamps transients to ≤35.5 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic-level drivers. | Use Scenario: ESD and load-dump protection on LIN bus lines connected to temperature/pressure sensors in engine compartments. IC Role / Device Role / Timing Role: Primary line-level transient suppressor located at connector entry point before signal conditioning circuitry. Use Value: Withstands 14.1 A surges while maintaining <22 V stand-off, preserving signal integrity during cold-crank and jump-start events. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Overvoltage protection on 24 V DC power input of PoE-powered remote units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamp on primary DC input rail, coordinated with upstream fusing and downstream ceramic capacitors. Use Value: Limits clamping voltage to 35.5 V, keeping downstream DC-DC converters within absolute maximum ratings during 10/1000 μs surges. | Use Scenario: Surge suppression on relay coil drive lines in smart washing machine control boards subject to contact arcing. IC Role / Device Role / Timing Role: Snubber-connected TVS absorbing energy from coil de-energization transients. Use Value: Handles 70 A non-repetitive forward surge (IFSM) and dissipates 500 W pulses without degradation, extending board lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | DO-214AA package (SMB), 5.0 mm x 4.6 mm surface-mount footprint vs. axial DO-15 | Requires PCB re-layout; better thermal performance in high-density designs but lacks axial lead flexibility | Select SMBJ22CA when automated SMT assembly and higher power density are prioritized over through-hole serviceability |
| P6KE22CA | Higher PPPM = 600 W, larger DO-15 variant with 1.5 W steady-state rating vs. 3.0 W at TL = 75 °C | Used in legacy telecom infrastructure where higher surge margin is mandated, but less optimized for compact industrial modules | Choose P6KE22CA only if system-level surge testing exceeds 500 W requirements or legacy BOM alignment is required |
Compared with SMBJ22CA and P6KE22CA, the SA22CA-E3/54 offers optimal balance of axial-mount compatibility, AEC-Q101 qualification, and precise 22 V stand-off for modern industrial sensor nodes - avoiding unnecessary size or power overhead while meeting automotive-grade reliability benchmarks.
Availability
SA22CA-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feeds requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 traceability.
Supply support for SA22CA-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, efficiency, and application-specific optimization.
The SAxxCA series targets board-level transient suppression in harsh environments, delivering standardized bidirectional TVS performance with AEC-Q101 validation and UL 94 V-0 safety compliance for automotive and industrial end equipment.
FAQ
What is the clamping voltage of SA22CA-E3/54 at its rated peak pulse current?
The SA22CA-E3/54 has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated 14.1 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured across the device terminals during surge conduction and defines the upper voltage limit imposed on protected circuits - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SA22CA-E3/54 maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is SA22CA-E3/54 suitable for automotive applications?
Yes, SA22CA-E3/54 is AEC-Q101 qualified, confirming its suitability for automotive applications including body electronics, sensor interfaces, and infotainment power domains. The qualification covers temperature cycling, humidity testing, mechanical shock, and surge endurance - all validated per the AEC-Q101 standard. As a bidirectional TVS, the SA22CA-E3/54 provides robust protection against load dump, jump start, and ESD events without polarity constraints, making it appropriate for LIN, CAN, and low-voltage sensor lines where the SA22CA-E3/54's 22 V stand-off aligns with common 12 V system architectures.
Does SA22CA-E3/54 have polarity markings on its package?
No, SA22CA-E3/54 does not feature polarity markings such as a cathode band because it is a bidirectional TVS diode. Its DO-15 package is unmarked, reflecting symmetrical avalanche behavior in both directions - meaning either lead can be connected to line or ground without affecting clamping function. This simplifies PCB layout and eliminates orientation errors during manual or automated assembly. The absence of marking is explicitly stated in the Vishay datasheet and applies uniformly across all CA-suffix variants in the SAxxCA family, including the SA22CA-E3/54.
What is the maximum steady-state power dissipation for SA22CA-E3/54?
The SA22CA-E3/54 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, as specified in the Vishay datasheet. This rating assumes ideal thermal conduction and must be derated linearly above 75 °C per the published derating curve. In typical PCB applications without heatsinking, actual usable power is significantly lower - generally limited by trace width, copper area, and ambient temperature. Engineers should reference Figure 5 (Steady State Power Derating Curve) in the SA22CA-E3/54 datasheet to determine safe operating limits under real board-level thermal conditions.
How does SA22CA-E3/54 differ from unidirectional SA22A-E3/54?
The SA22CA-E3/54 is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas the SA22A-E3/54 is unidirectional, featuring a cathode band and conducting only in reverse bias - forward conduction is blocked beyond ~3.5 V. Key differences include: SA22CA-E3/54 has identical VBR min/max (24.4–26.9 V) in both directions, while SA22A-E3/54 specifies forward voltage (VF) = 3.5 V at 100 A; SA22CA-E3/54 supports AC-coupled or floating-line protection, unlike SA22A-E3/54 which requires correct polarity orientation. These distinctions make the SA22CA-E3/54 preferred for differential signal lines or systems where voltage polarity reversal is possible.
SA22CA-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 14.1A
- 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)
SA22CA-E3/54 FAQ
1.How can I place an order for SA22CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22CA-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 SA22CA-E3/54 reliable?
The price and inventory of SA22CA-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 SA22CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA22CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22CA-E3/54?
SA22CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22CA-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 SA22CA-E3/54?
For technical support, including SA22CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22CA-E3/54 requirements.
6.How does Aetrix verify that SA22CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA22CA-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 SA22CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA22CA-E3/54?
All SA22CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA22CA-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 SA22CA-E3/54 part is unused and in its original packaging.
Return procedure for SA22CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA22CA-E3/54 Tags
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