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Vishay General Semiconductor - Diodes Division 1.5SMC22CA-M3/9AT
- Part No.:
- 1.5SMC22CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CA-M3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,358
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Product details
Overview
1.5SMC22CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features 22 V breakdown voltage (VBR min/max = 20.9–23.1 V at 1 mA), 18.8 V standoff voltage (VWM), 30.6 V maximum clamping voltage (VC) at 49 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - used in automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the 1.5SMC22CA-M3/9AT datasheet, 1.5SMC22CA-M3/9AT pinout, 1.5SMC22CA-M3/9AT application, or 1.5SMC22CA-M3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.63), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This device operates as a voltage-clamped bilateral protector: under reverse or forward transient stress beyond VWM, it avalanches symmetrically to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the SMC package supports automated placement and meets MSL Level 1 reflow (260 °C peak).
It delivers 1500 W peak pulse power per 10/1000 µs waveform with <1 ns response time and low incremental surge resistance - enabling robust protection against lightning-induced surges (IEC 61000-4-5) and inductive switching transients in 12 V/24 V automotive and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche onset threshold in both directions |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 30.6 V at 49 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| IPPM | 49 A - peak pulse current corresponding to VC = 30.6 V, critical for PCB trace sizing |
| Junction Temp Range | −65 °C to +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - standardized 7.75 mm × 6.22 mm surface-mount outline with matte tin leads |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case with two terminals; no polarity marking for bidirectional types - symmetrical anode/cathode configuration allows orientation-agnostic PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions above VWM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking - reduces manufacturing overhead |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of protection diodes or input amplifiers. Use Value: Limits transient voltage to ≤30.6 V, preventing damage to 3.3 V/5 V interface ICs while maintaining signal integrity during normal operation at 18.8 V standoff. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring surges and ground bounce. IC Role / Device Role / Timing Role: Primary transient suppressor mounted at connector entry point, shunting energy before reaching precision ADC front-end or op-amp buffers. Use Value: Absorbs up to 1500 W of surge energy with sub-nanosecond response, preserving measurement accuracy and avoiding latch-up in industrial-grade signal conditioning circuits. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding Ethernet PHY interfaces, DSL line drivers, and POTS line cards from lightning-induced surges entering via external cabling. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after gas discharge tube (GDT) primary protection to handle residual fast-rising transients. Use Value: Clamps residual transients to 30.6 V within nanoseconds, ensuring compliance with ITU-T K.21 basic protection level for telecom infrastructure. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and relay coils in washing machines, HVAC controls, and power tools. IC Role / Device Role / Timing Role: Across-the-line suppressor connected between motor terminals or across relay coil windings to quench inductive kickback. Use Value: Handles repetitive 1500 W pulses at 0.01 % duty cycle, extending relay contact life and preventing microcontroller reset from supply rail disturbance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Same VBR range (20.9–23.1 V) but lower PPPM = 600 W; SMB package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 line surges | Select when board space is constrained and surge threat level is limited to human-body-model ESD. |
| 1.5KE22CA | Through-hole DO-201 package; identical electrical specs but incompatible with SMT assembly and higher RθJA (100 °C/W vs. 75 °C/W) | Requires manual or wave soldering; not suitable for high-density automated production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ22CA and 1.5KE22CA, the 1.5SMC22CA-M3/9AT provides optimal balance of high-energy surge handling (1500 W), SMT manufacturability, and thermal performance (RθJA = 75 °C/W) - making it preferred for volume automotive and industrial applications requiring AEC-Q101-ready variants.
Availability
1.5SMC22CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and consumer appliance motor drives requiring stable component supply and halogen-free compliance.
Supply support for 1.5SMC22CA-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 and automotive-grade qualification.
The 1.5SMC Series targets high-power transient suppression in harsh environments, engineered specifically for AEC-Q101 readiness, automated SMT assembly, and robust clamping performance in 12 V/24 V systems.
FAQ
What is the standoff voltage rating of the 1.5SMC22CA-M3/9AT?
The 1.5SMC22CA-M3/9AT has a maximum reverse standoff voltage (VWM) of 18.8 V. This is the highest DC or continuous AC voltage the device can block without exceeding 1 µA leakage current - critical for ensuring no interference with normal 12 V or 24 V system operation while remaining ready to clamp transients above this threshold.
Is the 1.5SMC22CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC22CA-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the base M3 variant is commercial grade, its design basis and test structure align with automotive requirements; the HM3 variant (e.g., 1.5SMC22CAHM3_A/I) is fully AEC-Q101 qualified for under-hood use.
How does the bidirectional nature of the 1.5SMC22CA-M3/9AT affect PCB layout?
The 1.5SMC22CA-M3/9AT has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment. It can be placed across differential pairs, AC-coupled lines, or floating buses without concern for anode/cathode assignment - simplifying layout and reducing BOM complexity versus unidirectional alternatives.
What is the clamping voltage of the 1.5SMC22CA-M3/9AT under maximum surge conditions?
At its rated peak pulse current of 49 A (10/1000 µs waveform), the 1.5SMC22CA-M3/9AT clamps to a maximum of 30.6 V. This value - verified per Figure 1 and Table on page 2 of Vishay document 88303 - defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does the 1.5SMC22CA-M3/9AT require derating at elevated ambient temperatures?
Yes - the 1.5SMC22CA-M3/9AT must be derated above 25 °C ambient per Figure 2 in the datasheet. At 85 °C, its peak pulse power drops to ~850 W (57 % of 1500 W), and at 125 °C, it falls to ~450 W (30 %). Thermal design must account for PCB copper area (minimum 8.0 mm × 8.0 mm pads per terminal) to maintain effective junction temperature control.
1.5SMC22CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC22CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC22CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CA-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 1.5SMC22CA-M3/9AT reliable?
The price and inventory of 1.5SMC22CA-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 1.5SMC22CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CA-M3/9AT?
1.5SMC22CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CA-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 1.5SMC22CA-M3/9AT?
For technical support, including 1.5SMC22CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC22CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CA-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 1.5SMC22CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CA-M3/9AT?
All 1.5SMC22CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CA-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 1.5SMC22CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC22CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22CA-M3/9AT Tags
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