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Vishay General Semiconductor - Diodes Division 1.5SMC22CA-E3/9AT
- Part No.:
- 1.5SMC22CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CA-E3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC22CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 18.8 V stand-off voltage (VWM), and clamps transients to ≤30.6 V at 49 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is widely deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC22CA-E3/9AT datasheet, 1.5SMC22CA-E3/9AT pinout, 1.5SMC22CA-E3/9AT application, or 1.5SMC22CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B surge protector requirements.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast, repeatable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for continuous power dissipation of 6.5 W on an infinite heatsink at 50 °C and withstands operating junction temperatures from –65 °C to +150 °C. Mounting on 8.0 mm × 8.0 mm copper pads per terminal is required to achieve full 1500 W pulse rating per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise voltage threshold where clamping initiates reliably |
| VWM | 18.8 V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPPM | ≤30.6 V at 49 A - clamped voltage during 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity under standardized lightning/inductive-spike waveform |
| IPPM | 49 A - maximum non-repetitive surge current the device safely diverts without degradation |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, determines derating above 25 °C ambient |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm height and 7.75 mm length |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking - symmetrical terminals enable identical protection in either direction |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Identical physical structure to Anode; bidirectional operation eliminates cathode/anode functional distinction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity requirements when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes let-through voltage stress on protected ICs compared to higher-ratio suppressors |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and industrial surge protection modules requiring safety certification |
| AEC-Q101 qualified option | Available as 1.5SMC22CAHE3_A variant - supports automotive-grade reliability validation |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) from load-dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry to shunt transients before reaching signal conditioning circuitry. Use Value: Clamps 10/1000 µs surges to ≤30.6 V, ensuring protected transceivers remain within absolute maximum ratings even during 12 V system load dump. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and ground-bounce in factory automation systems. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on each isolated input channel, paired with series impedance. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, enabling reliable long-term operation in electrically noisy plant environments. |
| Telecom Line Card Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Secondary protection on POTS or xDSL line interfaces after primary gas discharge tube (GDT) suppression. IC Role / Device Role / Timing Role: Fast-response clamp limiting residual voltage to IC-level safe thresholds following GDT conduction. Use Value: Sub-1 ns response time and low VC ensure semiconductor interface ICs survive combined lightning-induced longitudinal surges. |
Use Scenario: Input-stage surge suppression on 5–24 V USB-C and barrel-jack power inputs in smart home hubs and audio equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing contact ESD (IEC 61000-4-2 ±8 kV) and accidental AC-line coupling events. Use Value: 18.8 V VWM allows uninterrupted operation during normal 24 V adapter ripple, while clamping 1500 W spikes to protect DC-DC controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Lower peak power (600 W), same VBR/VWM, SMB (DO-214AA) package - 30% smaller footprint, 40% lower surge capacity | Suitable for space-constrained consumer electronics with moderate surge exposure (e.g., USB ports) | Select when board area is critical and surge threat level is below IEC 61000-4-5 Level 3 |
| 1.5KE22CA | Higher peak power (1500 W), through-hole DO-201AE package - requires wave soldering, no RoHS-compliant E3 suffix standard | Preferred for legacy industrial power supplies and high-reliability military designs using through-hole assembly | Choose when through-hole mounting, higher mechanical robustness, or legacy BOM continuity is required |
Compared with SMBJ22CA and 1.5KE22CA, the 1.5SMC22CA-E3/9AT uniquely balances high surge capacity (1500 W), surface-mount scalability, RoHS compliance, and UL recognition - making it optimal for new automotive and industrial SMT production where regulatory alignment and automated placement are mandatory.
Availability
1.5SMC22CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer power adapter designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC22CA-E3/9AT 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 was engineered for high-energy transient suppression in demanding automotive, industrial, and telecom environments - prioritizing low clamping voltage, repeatable surge endurance, and AEC-Q101 qualification readiness.
FAQ
What is the breakdown voltage tolerance for 1.5SMC22CA-E3/9AT?
The 1.5SMC22CA-E3/9AT has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, representing a ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level surge margin design. The 1.5SMC22CA-E3/9AT meets this specification under standard JEDEC test conditions at 25 °C ambient.
Is 1.5SMC22CA-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC22CA-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free and RoHS-compliant versions, specify the "M3" suffix (e.g., 1.5SMC22CA-M3/9AT). Both variants meet JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements. The 1.5SMC22CA-E3/9AT uses matte tin-plated leads and UL 94 V-0 molding compound.
Does 1.5SMC22CA-E3/9AT require a heatsink for 6.5 W continuous operation?
No - the 6.5 W power dissipation rating for 1.5SMC22CA-E3/9AT applies only when mounted on an infinite heatsink at 50 °C ambient. In typical PCB applications, derating is required: at 25 °C ambient, maximum continuous power drops to ~3.3 W due to RθJA = 75 °C/W. For sustained DC power dissipation, use thermal vias and copper pour; the 1.5SMC22CA-E3/9AT is intended for transient, not steady-state, power handling.
How does the bidirectional nature of 1.5SMC22CA-E3/9AT affect PCB layout?
The 1.5SMC22CA-E3/9AT has no polarity marking and identical electrical behavior in both directions, simplifying PCB layout by eliminating orientation checks during automated placement. It must be placed symmetrically across the protected line pair (e.g., between RS-485 A/B lines or AC input terminals), with equal-length traces to both terminals to preserve balance. No cathode band alignment is needed - the 1.5SMC22CA-E3/9AT functions identically regardless of rotational placement.
What is the maximum allowable junction temperature for 1.5SMC22CA-E3/9AT?
The maximum operating junction temperature for 1.5SMC22CA-E3/9AT is +150 °C, with storage temperature extending from –65 °C to +150 °C. Derating curves in the Vishay datasheet (Fig. 2) show that peak pulse power must be reduced linearly above 25 °C ambient - e.g., at 85 °C ambient, only ~70% of the 1500 W rating is permissible. Thermal design must ensure the 1.5SMC22CA-E3/9AT junction stays below 150 °C during worst-case surge events.
1.5SMC22CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC22CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of 1.5SMC22CA-E3/9AT 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-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CA-E3/9AT?
1.5SMC22CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CA-E3/9AT 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-E3/9AT?
For technical support, including 1.5SMC22CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC22CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CA-E3/9AT?
All 1.5SMC22CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC22CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22CA-E3/9AT Tags
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