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Vishay General Semiconductor - Diodes Division 1.5SMC22A-M3/9AT
- Part No.:
- 1.5SMC22A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22A-M3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,669
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Product details
Overview
1.5SMC22A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 18.8 V maximum stand-off voltage (VWM), and clamps transients to ≤30.6 V at 49.0 A peak pulse current (10/1000 μs), delivering 1500 W peak pulse power in automotive and industrial power line protection.
For engineers reviewing the 1.5SMC22A-M3/9AT datasheet, 1.5SMC22A-M3/9AT pinout, 1.5SMC22A-M3/9AT application, or 1.5SMC22A-M3/9AT equivalent, this device is selected for high-reliability DC power rail protection where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.63), halogen-free RoHS compliance, and AEC-Q101 qualification readiness are critical design requirements.
Technical Context
The 1.5SMC22A-M3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, optimized for transient suppression on DC supply lines and signal paths subject to inductive switching or lightning-induced surges. Its 1500 W peak pulse rating (10/1000 μs) and 200 A non-repetitive forward surge capability (8.3 ms half-sine) support robust protection in harsh environments.
Thermal performance is defined by RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is rated for lead-free soldering at 260 °C peak, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1.0 mA - defines precise avalanche onset threshold for predictable clamping behavior |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, ensuring no false triggering |
| VC @ IPPM | ≤30.6 V at 49.0 A - clamping voltage under full 1500 W transient, yielding clamping ratio of 1.63 for effective downstream IC protection |
| PPPM | 1500 W (10/1000 μs) - peak surge energy handling capacity suitable for automotive load-dump and industrial surge immunity |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-energy single-event surges without bond-wire failure |
| TJ max. | +150 °C - enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief, compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., GND or return path); enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal during forward conduction; clamping node during reverse transient | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge testing on 24 V systems without derating |
| Glass-passivated chip junction | Ensures stable VBR tolerance (±5 %) and long-term reliability under thermal cycling and humidity stress |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills IPC-1752A material declaration requirements and EU ELV directive for automotive supply chains |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without pre-baking or moisture sensitivity concerns |
| AEC-Q101 qualification ready | Base P/N-M3 variant supports qualification path to automotive grade with documented test reports available upon request |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Module Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 3a/b (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping transients within nanoseconds. Use Value: Limits voltage excursion to ≤30.6 V, preventing damage to upstream DC/DC controllers and downstream microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding analog input channels (0–10 V, 4–20 mA) in programmable logic controllers against field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal conditioning front-end, positioned before precision op-amps and ADCs. Use Value: Maintains signal integrity by limiting transient overshoot to <31 V while adding <0.5 pF capacitance at 0 V bias-negligible impact on 10 kHz bandwidth signals. |
| Telecom DC Feeder Line Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeder lines in outdoor installations. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC input, coordinated with upstream fuse and downstream DC/DC converter. Use Value: Absorbs 1500 W surges without degradation, meeting Telcordia GR-1089-CORE Zone 3 immunity requirements for outdoor telecom infrastructure. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Freewheeling TVS across motor terminals, conducting inductive energy into local bulk capacitor during turn-off. Use Value: Withstands 200 A surge currents (8.3 ms) and repeated switching cycles, eliminating contact arcing and extending relay/mosfet lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A (Bourns) | Same VWM (18.8 V), but lower PPPM = 600 W and smaller SMB package (DO-214AA); RθJA = 85 °C/W | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump or industrial 4 kV testing | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| SMCJ22A (Littelfuse) | Identical VBR, VWM, and VC specs; same SMC package; PPPM = 1500 W; but standard version is halogen-containing (non-M3) | Requires material review for halogen-free compliance; AEC-Q101 qualification path differs (HM3 vs. HM3_X suffixes) | Choose if halogen content is not restricted; confirm MSL rating and whisker test compliance match your process requirements. |
Compared with SMBJ22A and SMCJ22A, the 1.5SMC22A-M3/9AT delivers identical surge robustness in the proven SMC footprint while guaranteeing halogen-free construction and direct alignment with Vishay's AEC-Q101 qualification roadmap-critical for Tier 1 automotive and regulated industrial programs.
Availability
1.5SMC22A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power feeds, and consumer appliance motor drives requiring stable component supply, halogen-free compliance, and long-term lifecycle assurance.
Supply support for 1.5SMC22A-M3/9AT 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 1.5SMC Series targets high-power transient suppression in space-constrained surface-mount designs, engineered for automotive, industrial, and telecom applications demanding AEC-Q101 readiness, robust surge handling, and consistent parametric stability.
FAQ
What is the clamping voltage of the 1.5SMC22A-M3/9AT at its rated peak pulse current?
The 1.5SMC22A-M3/9AT clamps to a maximum of 30.6 V when subjected to its rated peak pulse current of 49.0 A (10/1000 μs waveform). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and represents the upper limit of voltage seen by downstream circuitry during a full 1500 W transient event. The 1.5SMC22A-M3/9AT maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC22A-M3/9AT suitable for automotive applications?
Yes-the 1.5SMC22A-M3/9AT uses the M3 suffix denoting halogen-free, RoHS-compliant construction and is qualified per AEC-Q101 when ordered with the HM3_X suffix (e.g., 1.5SMC22AHM3_A/9AT). While the base 1.5SMC22A-M3/9AT is commercial-grade, its electrical specs, thermal ratings (TJ = 150 °C), and mechanical robustness align with automotive power rail protection requirements, and qualification documentation is available upon request. The 1.5SMC22A-M3/9AT itself is commonly deployed in Tier 2 automotive subsystems.
What does the "/9AT" suffix indicate in 1.5SMC22A-M3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with a standard quantity of 3500 pieces per reel. This format supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place feeders. The "M3" prefix confirms halogen-free, RoHS-compliant materials, while "A" specifies unidirectional polarity. The 1.5SMC22A-M3/9AT thus combines environmental compliance, production scalability, and precise electrical performance in one orderable part number.
How does the 1.5SMC22A-M3/9AT compare to bidirectional TVS diodes like 1.5SMC22CA?
The 1.5SMC22A-M3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., +24 V rail to GND), offering tighter VBR tolerance and lower leakage at VWM. In contrast, 1.5SMC22CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485), with symmetrical clamping in both directions but higher leakage above 10 V. The 1.5SMC22A-M3/9AT cannot replace 1.5SMC22CA in AC-coupled applications due to polarity dependence and lack of reverse-direction conduction.
What is the maximum operating temperature for the 1.5SMC22A-M3/9AT?
The 1.5SMC22A-M3/9AT has a specified operating junction temperature range of –65 °C to +150 °C. Its thermal resistance values-RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.)-enable reliable operation at full power dissipation in ambient temperatures up to +125 °C when mounted on recommended 8.0 mm × 8.0 mm copper pads. Derating curves in the datasheet (Fig. 2) must be applied for sustained power operation above 25 °C ambient.
1.5SMC22A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC22A-M3/9AT FAQ
1.How can I place an order for 1.5SMC22A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22A-M3/9AT 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 1.5SMC22A-M3/9AT reliable?
The price and inventory of 1.5SMC22A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC22A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22A-M3/9AT?
1.5SMC22A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22A-M3/9AT 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 1.5SMC22A-M3/9AT?
For technical support, including 1.5SMC22A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC22A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22A-M3/9AT 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 1.5SMC22A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC22A-M3/9AT?
All 1.5SMC22A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22A-M3/9AT, 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 1.5SMC22A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC22A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22A-M3/9AT Tags
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