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Vishay General Semiconductor - Diodes Division SMA5J22AHM3/I
- Part No.:
- SMA5J22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22AHM3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
SMA5J22AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) 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), 500 W peak pulse power (10/1000 µs), and operates from –55 °C to +150 °C - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the SMA5J22AHM3/I datasheet, SMA5J22AHM3/I pinout, SMA5J22AHM3/I application, or SMA5J22AHM3/I equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance (RθJA = 80 °C/W) under standard PCB pad layout per J-STD-020 MSL level 1.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 µs surges, while the SMA package supports automated SMT placement and meets UL 94 V-0 flammability rating.
The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification - validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance testing per JESD22-A110 and A113. Polarity is marked by a cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 24 V systems. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - guaranteed breakdown threshold defines turn-on consistency across production lots. |
| VC @ IPPM | 35.5 V at 14.1 A - clamping voltage limits downstream IC stress during 500 W transient events. |
| PPPM | 500 W (10/1000 µs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| TJ max. | +150 °C - enables operation in under-hood automotive environments without derating below full power. |
| RθJA | 80 °C/W - thermal resistance measured on 0.2" × 0.2" copper pads; informs heatsinking requirements for repeated surge duty. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, single-ended unidirectional configuration with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms clamping path when cathode is biased above VWM. |
| Cathode (banded end) | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to shunt current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) over temperature and lifetime. |
| AEC-Q101 qualified (HM3) | Validated for automotive powertrain and body electronics per stress test standards including HTOL and TCT. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 moisture sensitivity level 1 (peak reflow 260 °C). |
| Low Rsurge | Minimizes clamping voltage overshoot during fast-rising transients (e.g., inductive switch-off spikes). |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 35.5 V at 14.1 A, limiting stress on downstream regulators while surviving 500 W pulses without degradation. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA output lines adjacent to connector. Use Value: Sub-100 pF junction capacitance preserves signal integrity; fast response prevents latch-up in precision ADC front-ends. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges on long Ethernet runs. IC Role / Device Role / Timing Role: Primary surge clamp on 48 V DC input stage before isolation and regulation. Use Value: Withstands repetitive 500 W surges per IEC 61000-4-5; HM3 halogen-free construction meets telecom flame-retardancy mandates. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or on H-bridge supply rail. Use Value: 40 A IFSM rating handles commutation surges; 150 °C TJ max supports sealed enclosure thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22AHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when halogen-free content or automotive qualification is not required; lower cost alternative. |
| SMCJ22A | Same VWM/VC, but larger SMC (DO-214AB) package; higher IPPM (23.3 A) and PPPM (1500 W). | Used where higher surge margin is needed and board space allows larger footprint. | Choose for enhanced robustness in harsh industrial settings; requires PCB layout change due to different package outline. |
Compared with SMA5J22AHM3/I, SMA5J22AHE3/I omits halogen-free and AEC-Q101 compliance - reducing cost but excluding automotive use; SMCJ22A offers 3× higher power rating in a larger package, trading miniaturization for ruggedness in high-energy environments.
Availability
SMA5J22AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feed applications requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SMA5J22AHM3/I 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 SMA5J series is engineered for high-power-density transient suppression in space-constrained, thermally demanding environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and qualification rigor are mandatory.
FAQ
What is the clamping voltage of the SMA5J22AHM3/I and how is it measured?
The SMA5J22AHM3/I has a maximum clamping voltage (VC) of 35.5 V, measured at its rated peak pulse current (IPPM) of 14.1 A using a standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and production lot, ensuring predictable overvoltage limiting for protected circuits. The SMA5J22AHM3/I achieves this with low incremental surge resistance and a glass-passivated junction.
Is the SMA5J22AHM3/I qualified for automotive applications?
Yes, the SMA5J22AHM3/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code. This qualification covers stress tests including high-temperature operating life, temperature cycling, and surge endurance - making the SMA5J22AHM3/I suitable for automotive powertrain, body control, and ADAS subsystems where reliability under thermal and electrical stress is critical.
What does the "HM3" suffix mean in SMA5J22AHM3/I?
The "HM3" suffix in SMA5J22AHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (AEC-Q101, non-halogen-free) versions. The "I" denotes 13-inch tape-and-reel packaging (7500 units), and the device meets JESD201 Class 2 whisker resistance and J-STD-020 MSL level 1.
Can SMA5J22AHM3/I be used in bidirectional configurations?
No, SMA5J22AHM3/I is strictly unidirectional, as indicated by the "A" (not "CA") suffix and presence of a cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMA5J22CA) and lack polarity marking. Using SMA5J22AHM3/I in reverse-biased AC applications would result in forward conduction and failure; always verify polarity during layout and assembly.
What is the thermal resistance and recommended PCB layout for SMA5J22AHM3/I?
The SMA5J22AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain this rating, use minimum recommended pad layout per Vishay document 88875 - avoid thermal reliefs on pads, ensure solid copper pour connection, and maintain ≥0.1 mm solder mask opening around terminals for reliable reflow.
SMA5J22AHM3/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22AHM3/I FAQ
1.How can I place an order for SMA5J22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22AHM3/I 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 SMA5J22AHM3/I reliable?
The price and inventory of SMA5J22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22AHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22AHM3/I?
SMA5J22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22AHM3/I 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 SMA5J22AHM3/I?
For technical support, including SMA5J22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22AHM3/I requirements.
6.How does Aetrix verify that SMA5J22AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J22AHM3/I 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 SMA5J22AHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J22AHM3/I?
All SMA5J22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22AHM3/I, 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 SMA5J22AHM3/I part is unused and in its original packaging.
Return procedure for SMA5J22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J22AHM3/I Tags
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