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Vishay General Semiconductor - Diodes Division SMA5J22AHE3/5A
- Part No.:
- SMA5J22AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22AHE3/5A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,794
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Product details
Overview
SMA5J22AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 35.5 V clamping voltage at 14.1 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMA5J22AHE3/5A datasheet, SMA5J22AHE3/5A pinout, SMA5J22AHE3/5A application, or SMA5J22AHE3/5A equivalent, key selection criteria include clamping performance under 10/1000 µs surges, junction temperature derating above 25 °C, unidirectional polarity marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (24.4–26.9 V), it avalanches to limit transient energy across protected circuitry. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, and its glass-passivated junction enables stable performance over 150 °C maximum junction temperature.
The device is rated for 500 W peak pulse power with 10/1000 µs waveform, supports 40 A non-repetitive forward surge current (IFSM), and exhibits ≤1.0 µA reverse leakage at 22 V (VWM). It meets MSL level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 24.4 V / 26.9 V - Breakdown occurs within this range at 1 mA test current; sets minimum clamping threshold. |
| VC @ IPPM | 35.5 V at 14.1 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPPM | 500 W - Peak transient power dissipation capability; defines surge energy handling per IEC 61000-4-5 Level 4. |
| TJ max. | +150 °C - Maximum junction temperature; requires thermal pad design with RθJA = 80 °C/W for reliable operation. |
| Polarity | Unidirectional - Cathode marked by band; blocks forward conduction until avalanche in reverse direction. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.0 mm × 5.0 mm thermal pad footprint; optimized for automated placement. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected line; unmarked end of device body. |
| Cathode | Avalanche conduction terminal | Marked by visible band; connected to higher-potential side (e.g., VBUS or signal line); conducts during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per AEC standard. |
| Low incremental surge resistance | Enables tighter clamping (VC = 35.5 V) at 14.1 A, reducing voltage overshoot on sensitive 24 V rail interfaces. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1.0 µA) over lifetime and temperature extremes (−55 °C to +150 °C). |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; no baking required pre-assembly. |
| High power density | Delivers 500 W surge rating in SMA footprint-enables compact PCB layout versus larger DO-214AB or DO-214AA alternatives. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and GND, triggered within nanoseconds of overvoltage onset. Use Value: Clamps transients to ≤35.5 V, preventing damage to 36 V-rated DC-DC controllers and microcontrollers downstream. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed in series with signal path to ground, absorbing fast-rising spikes without affecting DC accuracy. Use Value: Maintains <1.0 µA leakage at 22 V, ensuring minimal impact on loop calibration while suppressing >1 kV ESD per IEC 61000-4-2. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side surge suppression in universal input AC/DC adapters supplying 19–24 V to laptops and monitors. IC Role / Device Role / Timing Role: Standoff-rated protector on DC output rail, activated only during abnormal line surges or hot-plug events. Use Value: Withstands 40 A single half-sine surge (IFSM), enabling robustness against capacitor inrush and short-circuit recovery transients. |
Use Scenario: Protecting -48 V DC feed lines in telecom base station power distribution boards from lightning-induced surges. IC Role / Device Role / Timing Role: Reverse-biased clamp referenced to system ground, limiting voltage excursions during induced common-mode transients. Use Value: 500 W PPPM rating sustains multiple 10/1000 µs surges per IEC 61000-4-5, preserving integrity of PoE-like power delivery circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22A-M3/5A | Same electrical specs, halogen-free RoHS-compliant variant; identical VWM, VBR, VC, PPPM, and thermal ratings. | No AEC-Q101 qualification; intended for commercial/industrial use only-not automotive-grade. | Select when halogen-free compliance is required and automotive qualification is unnecessary. |
| SMC5J22AHE3/5A | Same VWM/VBR/VC/PPPM, but in larger SMC (DO-214AB) package with higher thermal mass and RθJA = 35 °C/W. | Better thermal performance for high-duty-cycle surges; requires larger PCB area and different pad layout. | Choose for designs needing extended surge endurance or higher average power dissipation where space permits. |
Compared with SMA5J22AHE3/5A, the SMA5J22A-M3/5A offers identical protection performance without automotive qualification, while the SMC5J22AHE3/5A delivers superior thermal management in a larger footprint-enabling longer surge hold time in high-reliability industrial systems.
Availability
SMA5J22AHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, and telecom power feed circuits requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMA5J22AHE3/5A 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMA5JxxA family is engineered for high-power-density transient suppression in space-constrained automotive and industrial environments, delivering robust 500 W surge handling in the compact SMA package.
FAQ
What is the clamping voltage of the SMA5J22AHE3/5A under a 10/1000 µs surge?
The SMA5J22AHE3/5A clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 14.1 A with a 10/1000 µs waveform. This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA5J22AHE3/5A maintains this clamping performance across its specified operating temperature range.
Is the SMA5J22AHE3/5A suitable for automotive applications?
Yes, the SMA5J22AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use, with ordering code suffix "HE3" indicating RoHS-compliant and AEC-Q101 qualified construction. It supports operating junction temperatures from −55 °C to +150 °C and passes automotive-grade reliability tests including temperature cycling and mechanical shock. The SMA5J22AHE3/5A is commonly deployed in engine control units and body electronics modules.
How does the SMA5J22AHE3/5A differ from bidirectional variants like SMA5J22CA?
The SMA5J22AHE3/5A is unidirectional and features a cathode band for polarity identification, conducting only in reverse avalanche mode. In contrast, SMA5J22CA is bidirectional with symmetrical clamping in both directions and no polarity marking. Their VWM and VBR values differ: SMA5J22AHE3/5A has VWM = 22 V and VBR = 24.4–26.9 V, whereas SMA5J22CA has VWM = 18.8 V and VBR = 20.9–23.1 V. The SMA5J22AHE3/5A is not interchangeable with SMA5J22CA without circuit redesign.
What is the thermal resistance of the SMA5J22AHE3/5A, and how does it affect layout?
The SMA5J22AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad size increases RθJA and risks thermal runaway during repeated surges. Layout must allocate sufficient copper area and avoid thermal isolation to maintain safe TJ ≤ 150 °C. The SMA5J22AHE3/5A thermal performance is validated only with this pad configuration.
Does the SMA5J22AHE3/5A have a specified junction capacitance?
No, the official Vishay datasheet for SMA5J5.0A–SMA5J40CA does not specify junction capacitance (CJ) for the SMA5J22AHE3/5A. While Fig. 4 provides typical CJ curves for the family, values are given only at VWM and zero bias for selected voltages (e.g., 5 V, 10 V, 20 V), and no data point corresponds to 22 V. Therefore, CJ for SMA5J22AHE3/5A is not characterized in the documentation and should be verified experimentally if critical for high-frequency signal line protection.
SMA5J22AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22AHE3/5A FAQ
1.How can I place an order for SMA5J22AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22AHE3/5A 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 SMA5J22AHE3/5A reliable?
The price and inventory of SMA5J22AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J22AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22AHE3/5A?
SMA5J22AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22AHE3/5A 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 SMA5J22AHE3/5A?
For technical support, including SMA5J22AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22AHE3/5A requirements.
6.How does Aetrix verify that SMA5J22AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J22AHE3/5A 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 SMA5J22AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J22AHE3/5A?
All SMA5J22AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22AHE3/5A, 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 SMA5J22AHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J22AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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