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Vishay General Semiconductor - Diodes Division 1.5SMC22CA-M3/57T
- Part No.:
- 1.5SMC22CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CA-M3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,175
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Product details
Overview
1.5SMC22CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), and clamps to ≤30.6 V at 49 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line cards.
For engineers reviewing the 1.5SMC22CA-M3/57T datasheet, 1.5SMC22CA-M3/57T pinout, 1.5SMC22CA-M3/57T application, or 1.5SMC22CA-M3/57T equivalent, this page delivers verified electrical specs, SMC (DO-214AB) package details, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), and AEC-Q101-qualified alternatives for automotive-grade ESD/surge design validation.
Technical Context
The 1.5SMC22CA-M3/57T operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while the 10/1000 µs waveform rating reflects real-world lightning and inductive-switching surge immunity.
Thermally, it uses a low-profile SMC (DO-214AB) surface-mount package with matte tin-plated leads, rated for TJ = –65 to +150 °C and MSL Level 1 (260 °C reflow). The halogen-free, RoHS-compliant M3 suffix confirms compliance with JESD201 Class 2 whisker resistance and UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 22 V - Maximum continuous reverse voltage before conduction; defines safe operating window for protected circuitry. |
| VBR (Breakdown) | 24.4–26.9 V at 1 mA - Verified avalanche onset range; ensures predictable clamping initiation under transients. |
| VC (Clamping) | ≤30.6 V at IPPM = 49 A - Peak voltage seen by downstream ICs during 1500 W surge; limits stress on 3.3 V/5 V logic. |
| PPPM | 1500 W (10/1000 µs) - Withstands high-energy surges common in automotive load-dump or industrial motor switching. |
| ID (Leakage) | ≤1.0 µA at VWM - Negligible standby current; avoids signal distortion or battery drain in always-on systems. |
| RθJA | 75 °C/W - Enables thermal design on standard 8 mm × 8 mm copper pads; supports sustained 6.5 W power dissipation at TA = 50 °C. |
| Package | SMC (DO-214AB) - Industry-standard footprint compatible with automated SMT placement; no polarity marking required for bidirectional use. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration - no cathode/anode marking; symmetrical terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; enables AC-line or differential protection without orientation constraints. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing symmetrical avalanche path; identical electrical role to Terminal 1 - no functional distinction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or transformer-coupled interfaces without external polarity management. |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements when used with appropriate PCB layout and series impedance. |
| Halogen-free, RoHS-compliant (M3) | Complies with automotive and industrial environmental mandates; qualified per JESD201 Class 2 for long-term reliability. |
| AEC-Q101 qualification option | Available in HM3 variant (e.g., 1.5SMC22CAHM3_A/H); validated for automotive under-hood and infotainment applications. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 30 kV/µs), improving protection margin for sensitive analog front-ends. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Module |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±30 V transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/350 ms) with <30.6 V clamping, preventing latch-up in 5 V microcontrollers. |
Use Scenario: Safeguarding 24 V DC digital input channels in PLC backplanes against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Primary surge suppression device across input terminals, coordinated with series current-limiting resistors. Use Value: Absorbs 1500 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5, reducing field failure rates. |
| Telecom Line Card Protection | Consumer USB Power Delivery Port |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on outdoor-facing RJ-45 ports. IC Role / Device Role / Timing Role: First-stage protector on each twisted pair, paired with gas discharge tubes for staged coordination. Use Value: Clamps common-mode transients to <30.6 V within 1 ns, preserving Ethernet signal integrity up to 1 Gbps. |
Use Scenario: Secondary overvoltage guard on USB-C VBUS lines after primary eFuse, mitigating adapter fault conditions. IC Role / Device Role / Timing Role: Fast-response backup clamp limiting VBUS to ≤30.6 V during 20 V adapter short-circuit events. Use Value: Prevents damage to USB PD controllers and port partner negotiation ICs during sustained overvoltage beyond 20 V spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 110 °C/W). | Suitable for space-constrained consumer electronics where 600 W surge margin suffices. | Select SMBJ22CA only if board area is critical and surge energy remains ≤600 W; verify thermal derating at elevated ambient. |
| 1.5SMC22CAHM3_A/H | Identical electrical specs; AEC-Q101 qualified, halogen-free, and automotive-grade screening (HTOL, TC, UHAST). | Required for automotive OEM designs needing PPAP documentation and extended temperature validation. | Choose 1.5SMC22CAHM3_A/H when qualifying for automotive Tier-1 programs - same footprint and performance, enhanced reliability evidence. |
Compared with 1.5SMC22CA-M3/57T, SMBJ22CA trades surge capacity for compactness, while 1.5SMC22CAHM3_A/H adds automotive qualification without altering electrical behavior - enabling drop-in replacement where AEC-Q101 compliance is mandatory.
Availability
1.5SMC22CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line-card surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC22CA-M3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where 1500 W surge handling and AEC-Q101 readiness are essential.
FAQ
What is the clamping voltage of the 1.5SMC22CA-M3/57T at its rated peak pulse current?
The 1.5SMC22CA-M3/57T clamps to a maximum of 30.6 V at its specified peak pulse current (IPPM) of 49 A, measured under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
Is the 1.5SMC22CA-M3/57T suitable for automotive applications?
The 1.5SMC22CA-M3/57T itself is commercial-grade and halogen-free (M3 suffix), but not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5SMC22CAHM3_A/H variant - same electrical specs and SMC package - which is fully AEC-Q101 qualified for automotive under-hood and infotainment use. For production automotive designs, 1.5SMC22CAHM3_A/H is the recommended drop-in alternative.
How does the bidirectional configuration of the 1.5SMC22CA-M3/57T affect PCB layout?
The 1.5SMC22CA-M3/57T has no polarity marking and functions identically in either orientation, simplifying PCB layout for AC-coupled or differential lines like RS-485, CAN, or Ethernet pairs. Unlike unidirectional TVS diodes, it eliminates orientation verification during assembly and supports symmetric placement across balanced signal paths - reducing design review time and eliminating reverse-mount defects.
What is the thermal resistance and power derating behavior of the 1.5SMC22CA-M3/57T?
The 1.5SMC22CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Its steady-state power dissipation (PD) is rated at 6.5 W at TA = 50 °C, derating linearly above that temperature - for example, to ~4.5 W at TA = 75 °C. This derating curve is defined in Figure 2 of the Vishay datasheet (Doc. #88303).
Does the 1.5SMC22CA-M3/57T meet any industry surge immunity standards?
The 1.5SMC22CA-M3/57T is rated for 1500 W peak pulse power with a 10/1000 µs waveform, aligning with key surge test profiles including IEC 61000-4-5 (Level 4: 4 kV line-to-ground), ISO 7637-2 Pulse 5a (load dump), and GR-1089-CORE telecom surge requirements. While the device itself is not "certified" to these standards, its published clamping performance and energy handling enable system-level compliance when integrated per Vishay's recommended layout guidelines.
1.5SMC22CA-M3/57T 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-M3/57T FAQ
1.How can I place an order for 1.5SMC22CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CA-M3/57T 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-M3/57T reliable?
The price and inventory of 1.5SMC22CA-M3/57T 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-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CA-M3/57T?
1.5SMC22CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CA-M3/57T 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-M3/57T?
For technical support, including 1.5SMC22CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC22CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CA-M3/57T?
All 1.5SMC22CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC22CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22CA-M3/57T Tags
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