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Vishay General Semiconductor - Diodes Division SMA5J22-E3/5A
- Part No.:
- SMA5J22-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22-E3/5A.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
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Product details
Overview
SMA5J22-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown range (VBR), 35.5 V clamping voltage at 14.1 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform). It is widely used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J22-E3/5A datasheet, SMA5J22-E3/5A pinout, SMA5J22-E3/5A application, or SMA5J22-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, AEC-Q101 qualification (via HE3 variant), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 22 V stand-off voltage and rapidly avalanches above its 24.4–26.9 V breakdown threshold to limit transient overvoltages. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and ESD events.
The device uses a glass-passivated silicon junction and is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead) under defined PCB pad conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 24.4 V / 26.9 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold |
| VC @ IPPM | 35.5 V - Clamped voltage during 14.1 A 10/1000 µs surge; determines protected circuit's maximum stress |
| PPPM | 500 W - Peak pulse power handling capability; sets surge energy limit per event |
| IPPM | 14.1 A - Peak surge current supported at rated clamping voltage and waveform |
| TJ max | 150 °C - Maximum allowable junction temperature; constrains thermal design and derating |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" Cu pads; guides PCB copper area requirements |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band on one end; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| AEC-Q101 qualified (HE3 variant) | Validated for automotive-grade operation including temperature cycling, humidity, and mechanical shock |
| MSL Level 1 (260 °C peak reflow) | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for downstream ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation systems exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Point-of-load TVS on 4–20 mA current loop output line. Use Value: Clamps 500 W surges without degradation, maintaining signal integrity and avoiding false triggers in PLC inputs. |
| Consumer Power Adapter Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Input-stage surge protection in universal AC/DC adapters for laptops and monitors. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor input to absorb line-induced surges. Use Value: Withstands 14.1 A peak pulses while maintaining <1 µA leakage at 22 V, minimizing standby power loss. | Use Scenario: Overvoltage protection on -48 V DC feeder lines feeding remote radio units in 4G/5G base stations. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMA5J22CA) not applicable; SMA5J22-E3/5A used for negative-rail clamping only. Use Value: Provides precise 22 V standoff with 35.5 V clamping, aligning with telecom equipment fault thresholds and safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22AHE3/5A | AEC-Q101 qualified; identical electrical specs; same DO-214AC package and marking code 5BX | Required for automotive OEM designs requiring component-level qualification evidence | Select when automotive qualification documentation and traceability are mandatory |
| SMCJ22A-E3/57T | Higher 1500 W PPPM, larger DO-214AB (SMC) package, 33.2 V VC at 45.8 A IPPM | Suitable for higher-energy surge environments (e.g., industrial motor drives) where board space allows larger footprint | Select when surge energy exceeds 500 W capability and PCB layout accommodates SMC outline |
Compared with SMA5J22AHE3/5A, the SMA5J22-E3/5A lacks formal AEC-Q101 certification but shares identical electrical performance and packaging-ideal for cost-sensitive industrial or consumer use. Versus SMCJ22A-E3/57T, it trades surge capacity for compactness, enabling tighter layouts where 500 W protection suffices.
Availability
SMA5J22-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and consumer adapter designs requiring stable component supply, RoHS compliance, and high-volume tape-and-reel delivery (7500 pcs per 13" reel).
Supply support for SMA5J22-E3/5A 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, power density, and automotive-grade validation.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in space-constrained DC power and interface circuits across automotive, industrial, and computing markets.
FAQ
What is the polarity configuration of the SMA5J22-E3/5A?
The SMA5J22-E3/5A is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the DO-214AC (SMA) package body; the unbanded end is the anode. This polarity must be observed during PCB layout to ensure correct clamping direction on positive-rail applications. The SMA5J22-E3/5A does not conduct in reverse bias until breakdown, unlike bi-directional variants such as SMA5J22CA.
What is the maximum clamping voltage of the SMA5J22-E3/5A under surge conditions?
The SMA5J22-E3/5A has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 14.1 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads). The SMA5J22-E3/5A maintains this clamping performance across its operational temperature range, supporting robust overvoltage protection design.
Is the SMA5J22-E3/5A RoHS compliant and lead-free?
Yes, the SMA5J22-E3/5A is RoHS compliant and lead-free. The "E3" suffix explicitly denotes Vishay's commercial-grade, RoHS-compliant construction with matte tin-plated leads. It meets JESD 201 Class 1A whisker testing and is rated for lead-free reflow soldering up to 260 °C peak temperature (MSL Level 1). The SMA5J22-E3/5A is suitable for environmentally regulated production without exemption requests.
How does the SMA5J22-E3/5A differ from the SMA5J22AHE3/5A variant?
The SMA5J22-E3/5A and SMA5J22AHE3/5A share identical electrical specifications, package (DO-214AC), marking (5BX), and RoHS compliance-but differ in qualification status. The "HE3" suffix indicates AEC-Q101 qualification, including extended reliability testing for automotive applications. The SMA5J22-E3/5A is commercial-grade and intended for industrial or consumer use where formal automotive qualification is not required.
What is the thermal resistance of the SMA5J22-E3/5A, and how does it affect layout?
The SMA5J22-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimal PCB copper; increasing pad area or adding thermal vias reduces RθJA and improves surge endurance. For reliable 500 W pulse handling, designers should follow Vishay's recommended pad layout and avoid excessive trace length between the SMA5J22-E3/5A and ground plane.
SMA5J22-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 12.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22-E3/5A FAQ
1.How can I place an order for SMA5J22-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22-E3/5A 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 SMA5J22-E3/5A reliable?
The price and inventory of SMA5J22-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J22-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22-E3/5A?
SMA5J22-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22-E3/5A 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 SMA5J22-E3/5A?
For technical support, including SMA5J22-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22-E3/5A requirements.
6.How does Aetrix verify that SMA5J22-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J22-E3/5A 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 SMA5J22-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J22-E3/5A?
All SMA5J22-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22-E3/5A, 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 SMA5J22-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J22-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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