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Vishay General Semiconductor - Diodes Division 1.5SMC22CAHM3/I
- Part No.:
- 1.5SMC22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CAHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
1.5SMC22CAHM3/I 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 IT = 1.0 mA), 18.8 V stand-off voltage (VWM), 30.6 V maximum clamping voltage (VC) at 49.0 A peak pulse current (IPPM), and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the 1.5SMC22CAHM3/I datasheet, 1.5SMC22CAHM3/I pinout, 1.5SMC22CAHM3/I application, or 1.5SMC22CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMC package supports high thermal dissipation under repetitive surge conditions.
The 1.5SMC22CAHM3/I is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications, 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 initiation threshold for reliable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 30.6 V at 49.0 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| IPPM | 49.0 A - maximum non-repetitive surge current the device can safely divert |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking - both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for bidirectional surge conduction - no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern electronics manufacturing and end-of-life disposal |
| 1500 W peak pulse power | Supports robust protection against lightning-induced surges and inductive switching transients in industrial control systems |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected circuitry compared to higher-ratio TVS devices |
| MSL Level 1 rating | Enables direct placement without baking or special moisture-sensitive handling prior to reflow |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from ESD and load-dump transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal pairs to limit transient excursions. Use Value: Prevents latch-up or damage to microcontroller ADC inputs and transceiver ICs during ISO 16750-2 pulse 5a/b events. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each input line, referenced to common ground. Use Value: Maintains functional integrity during 1 kV/500 A surge tests per IEC 61000-4-5, reducing false triggering and field returns. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Board |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from induced surges on long cable runs in building automation networks. IC Role / Device Role / Timing Role: Differential-mode TVS pair placed across A/B bus lines to suppress common-mode and differential-mode transients. Use Value: Ensures >10,000 surge cycles without degradation, supporting EN 61000-4-4 level 4 immunity compliance. |
Use Scenario: Clamping back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to absorb inductive energy during PWM commutation. Use Value: Eliminates need for snubber RC networks, reducing BOM count and PCB area while maintaining UL 60335-1 surge withstand. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Lower peak power rating (600 W), smaller SMB package (DO-214AA), higher VC/VBR ratio (1.41) | Best suited for space-constrained consumer electronics where surge severity is lower | Select when board area is critical and IEC 61000-4-5 test levels ≤ 0.5 kV are sufficient |
| 1.5KE22CA | Through-hole TO-204AE (DO-15) package, same VBR/VC specs but higher RθJA (100 °C/W) | Used in legacy industrial power supplies where manual assembly or wave soldering is preferred | Choose only if SMT process is unavailable or thermal management via heatsinking is feasible |
Compared with SMBJ22CA and 1.5KE22CA, the 1.5SMC22CAHM3/I delivers superior surge robustness in a surface-mount format with automotive qualification and halogen-free construction - making it optimal for next-generation automotive and industrial designs requiring high-reliability, automated assembly, and regulatory compliance.
Availability
1.5SMC22CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and appliance motor control systems requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC22CAHM3/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 high-reliability, high-efficiency, and application-specific performance.
The 1.5SMC Series was developed to deliver high-power transient suppression in compact SMT packages for automotive, industrial, and communications equipment - balancing clamping precision, surge endurance, and manufacturability.
FAQ
What is the breakdown voltage tolerance for 1.5SMC22CAHM3/I?
The 1.5SMC22CAHM3/I has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1.0 mA, corresponding to ±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 analysis.
Is 1.5SMC22CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC22CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from −65 °C to +150 °C and validated for mechanical shock, temperature cycling, and humidity exposure per JESD22 standards - making it appropriate for engine control, body electronics, and ADAS sensor protection.
What does the "CA" suffix mean in 1.5SMC22CAHM3/I?
The "CA" suffix in 1.5SMC22CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VWM, and VC characteristics regardless of voltage polarity applied. This eliminates the need for polarity-aware layout and simplifies design for AC-coupled or differential signal paths.
How does the SMC package of 1.5SMC22CAHM3/I compare thermally to SMA or SMB packages?
The SMC (DO-214AB) package used by 1.5SMC22CAHM3/I offers significantly better thermal performance than SMA (DO-214AC) or SMB (DO-214AA): its typical RθJA is 75 °C/W versus ~120 °C/W for SMB, enabling higher sustained power dissipation and improved reliability under repetitive surge conditions - especially when mounted on 8.0 mm × 8.0 mm copper pads as specified.
Can 1.5SMC22CAHM3/I be used in place of unidirectional TVS diodes like 1.5SMC22AHM3/I?
No - the 1.5SMC22CAHM3/I is strictly bidirectional and lacks polarity marking; substituting it for a unidirectional part like 1.5SMC22AHM3/I would compromise protection on DC-biased lines where forward conduction must be blocked. Unidirectional variants have a cathode band and conduct only in reverse bias - use only when circuit topology requires asymmetric clamping behavior.
1.5SMC22CAHM3/I 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC22CAHM3/I FAQ
1.How can I place an order for 1.5SMC22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CAHM3/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 1.5SMC22CAHM3/I reliable?
The price and inventory of 1.5SMC22CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CAHM3/I?
1.5SMC22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CAHM3/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 1.5SMC22CAHM3/I?
For technical support, including 1.5SMC22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CAHM3/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 1.5SMC22CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CAHM3/I?
All 1.5SMC22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CAHM3/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 1.5SMC22CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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