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Vishay General Semiconductor - Diodes Division SA22A-E3/54
- Part No.:
- SA22A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22A-E3/54.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,881
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Product details
Overview
SA22A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 14.1 A peak pulse current (IPPM), and clamps to ≤35.5 V at rated surge current.
For engineers reviewing the SA22A-E3/54 datasheet, SA22A-E3/54 pinout, SA22A-E3/54 application, or SA22A-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal mapping, AEC-Q101 qualification status, clamping performance under 10/1000 μs surge, and real-world protection use cases for automotive sensor lines, industrial I/O, and power supply rails.
Technical Context
The SA22A-E3/54 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages. Its 22 V stand-off voltage allows reliable operation below system rail voltages while maintaining low leakage (<1.0 μA at VWM).
It delivers 500 W peak pulse power per 10/1000 μs waveform with 0.01 % duty cycle, and exhibits low incremental clamping resistance-VC = 35.5 V at IPPM = 14.1 A-ensuring effective voltage limiting during ESD and surge events in DC power and signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| IPPM | 14.1 A (10/1000 μs) - Peak surge current capability; defines maximum transient energy absorption without failure. |
| VC | ≤35.5 V at IPPM - Clamped voltage during full-rated surge; determines protected circuit's maximum stress level. |
| PPPM | 500 W (10/1000 μs) - Peak pulse power rating; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity. |
| IFSM | 70 A (10 ms half-sine) - Non-repetitive forward surge rating; supports inrush or fault-current handling in power rails. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy-molded, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-side reference in unidirectional clamp configuration. |
| Cathode (banded end) | Reverse-biased blocking terminal / clamping node | Connected to protected line (e.g., 24 V rail or sensor output); conducts when V > VBR to shunt surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress. |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive power inputs. |
| AEC-Q101 qualified (E3 suffix variant) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per AEC stress profiles. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping-critical for protecting 3.3 V or 5 V logic interfaced via level-shifted lines. |
| Solder dip rated 275 °C for 10 s | Supports standard wave and reflow assembly processes without degradation of junction integrity. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients before they reach downstream op-amps or ADC inputs. Use Value: Limits voltage to ≤35.5 V during 14.1 A surge, preventing latch-up or permanent damage to 5 V tolerant interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoid/relay coils and field wiring surges. IC Role / Device Role / Timing Role: Standoff-clamp device on 24 V DC input channels, absorbing energy from 500 W transients without degrading signal integrity during normal operation. Use Value: Maintains <1.0 μA leakage at 22 V, ensuring minimal loading on high-impedance dry-contact or optocoupler input circuits. |
| DC Power Rail Protection | Telecom Line Interface |
Use Scenario: Secondary overvoltage protection on 24 V DC power distribution boards upstream of DC/DC converters and microcontrollers. IC Role / Device Role / Timing Role: Fast-acting shunt element that activates within nanoseconds to divert surge current away from downstream regulators and LDOs. Use Value: Withstands 70 A non-repetitive forward surge, supporting robustness against accidental reverse polarity or short-circuit faults. | Use Scenario: Protecting RS-485 transceiver pins and Ethernet PHY interfaces from ESD and lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary transient suppressor on differential pair lines, used with common-mode chokes to meet IEC 61000-4-5 Level 4 (4 kV) requirements. Use Value: Achieves <35.5 V clamping at 14.1 A, keeping differential voltage across transceiver inputs within safe absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same VWM (22 V), identical DO-214AC package; slightly higher VC (35.7 V), lower IPPM (13.9 A), same PPPM (400 W). | Surface-mount alternative; requires PCB redesign; less suitable for through-hole legacy industrial designs. | Select SMAJ22A only when board space constraints mandate SMD and thermal management supports lower power derating. |
| P6KE22A | Same VWM (22 V), larger DO-15 package but higher PPPM (600 W); VC = 36.5 V at 13.7 A; not AEC-Q101 qualified. | Higher surge margin for heavy-industrial environments; lacks automotive qualification and tighter VBR tolerance. | Choose P6KE22A where 600 W surge headroom is required and AEC-Q101 compliance is not mandatory. |
Compared with SMAJ22A and P6KE22A, the SA22A-E3/54 offers AEC-Q101 qualification, tighter VBR tolerance (24.4–26.9 V), and optimized clamping (35.5 V) for 24 V system protection-making it preferred for automotive and high-reliability industrial deployments where qualification and consistency are critical.
Availability
SA22A-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and 24 V DC power rail safeguarding requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for SA22A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SAxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, precise clamping, and high surge endurance are mandatory.
FAQ
What is the maximum clamping voltage of the SA22A-E3/54 under rated surge conditions?
The SA22A-E3/54 clamps to a maximum of 35.5 V when subjected to its rated 14.1 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects worst-case voltage seen by protected circuitry during surge events-critical for verifying compatibility with downstream IC absolute maximum ratings.
Is the SA22A-E3/54 qualified for automotive applications?
Yes, the SA22A-E3/54 is AEC-Q101 qualified, as confirmed in Vishay document 88378 (Rev. 27-Sep-2021). The "E3" suffix denotes RoHS-compliant commercial grade with JESD 201 Class 1A whisker resistance, and the base SA22A family is explicitly listed under AEC-Q101 qualified devices in the datasheet notes. This makes SA22A-E3/54 suitable for under-hood and body-control module applications.
What is the reverse leakage current of the SA22A-E3/54 at its stand-off voltage?
At its 22 V stand-off voltage (VWM) and TA = 25 °C, the SA22A-E3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This low leakage ensures minimal power loss and no measurable loading on high-impedance sensor or communication lines during normal operation-key for battery-powered and precision analog systems.
Does the SA22A-E3/54 have a defined polarity marking, and how is it identified?
Yes, the SA22A-E3/54 is unidirectional and features a cathode band (color band) on the DO-15 package body. Per Vishay documentation, the banded end is the cathode terminal, which must be connected toward the protected line (e.g., 24 V rail), while the anode connects to ground or return path. No marking is present on bidirectional variants, but SA22A-E3/54 is explicitly unidirectional.
What is the junction temperature limit and thermal derating behavior of the SA22A-E3/54?
The SA22A-E3/54 has a maximum junction temperature (TJ max) of +175 °C and follows standard derating curves: steady-state power dissipation drops linearly from 3.0 W at TL = 75 °C to zero at TL = 175 °C (per Fig. 5). This enables reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures when mounted with adequate lead length (≥9.5 mm).
SA22A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SA22A-E3/54 FAQ
1.How can I place an order for SA22A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22A-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 SA22A-E3/54 reliable?
The price and inventory of SA22A-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 SA22A-E3/54 is usually 5 days.
3.What payment methods are accepted for SA22A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22A-E3/54?
SA22A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22A-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 SA22A-E3/54?
For technical support, including SA22A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22A-E3/54 requirements.
6.How does Aetrix verify that SA22A-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA22A-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 SA22A-E3/54 meets industry standards.
7.What is the process for return or replacement of SA22A-E3/54?
All SA22A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA22A-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 SA22A-E3/54 part is unused and in its original packaging.
Return procedure for SA22A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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