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Vishay General Semiconductor - Diodes Division 1.5SMC20CAHM3/H
- Part No.:
- 1.5SMC20CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CAHM3/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,861
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Product details
Overview
1.5SMC20CAHM3/H 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 20 V standoff voltage (VWM), 22.2 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), clamping voltage of 32.4 V at 46.2 A, and operates across -65 °C to +150 °C. It is used in automotive sensor interfaces and industrial I/O protection where fast transient suppression is critical.
For engineers reviewing the 1.5SMC20CAHM3/H datasheet, 1.5SMC20CAHM3/H pinout, 1.5SMC20CAHM3/H application, or 1.5SMC20CAHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, SMC (DO-214AB) package details, clamping performance under surge conditions, and direct alternatives with documented parameter differences.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical avalanche structure enables identical clamping behavior in both polarities, making it suitable for AC-coupled or floating signal paths without polarity concerns.
Rated for 1500 W peak pulse power per 10/1000 µs waveform and 6.5 W steady-state power dissipation, it supports repetitive transients at 0.01% duty cycle when mounted on 8.0 mm × 8.0 mm copper pads. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation in compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Min) | 22.2 V at 1 mA - Guaranteed avalanche initiation voltage; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 32.4 V at 46.2 A - Clamped voltage during 1500 W surge; determines maximum stress imposed on protected ICs. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| TJ Range | -65 °C to +150 °C - Full operational junction temperature range; supports under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC-Q101 Rev G. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, UL 94 V-0 rated compound, and no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (symmetrical) | Bidirectional terminals - interchangeable; no cathode band marking; either terminal serves as anode or cathode depending on transient polarity. |
| Terminal 2 | Anode / Cathode (symmetrical) | Identical to Terminal 1 - fully symmetrical device; no functional distinction between pins; PCB layout requires no orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating buses without polarity constraints or external circuitry. |
| 1500 W peak pulse rating | Withstands severe lightning-induced surges (IEC 61000-4-5) and inductive switching spikes in motor drives and power supplies. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment power rails. |
| Low clamping ratio (VC/VBR = 1.46) | Minimizes voltage overshoot during transients, reducing risk of latch-up or damage to downstream 3.3 V/5 V logic. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients within 1 ns. Use Value: Prevents permanent damage to 5 V tolerant transceivers and maintains signal integrity during 1500 W surge events. |
Use Scenario: Shielding digital input/output channels in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting transients before they reach optocoupler or microcontroller GPIO pins. Use Value: Eliminates need for series resistors or RC filters while maintaining <100 ns response and <33 V clamping ceiling. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors from induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC lines to absorb common-mode transients coupled via transformer parasitics. Use Value: Maintains IEEE 802.3af compliance by limiting clamped voltage to <35 V during 10/1000 µs surges up to 1500 W. |
Use Scenario: Input-stage protection for wall adapters and USB-C PD chargers exposed to mains-borne surges and hot-plug transients. IC Role / Device Role / Timing Role: First-line defense across bulk capacitor terminals to suppress differential-mode line surges before rectification. Use Value: Enables compact design with 20 V VWM matching typical 24 V adapter outputs while surviving repeated 1500 W pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM (20 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when space is constrained and surge energy does not exceed 600 W; verify thermal margin with reduced pad area. |
| 1.5KE20CA | Same VWM (20 V), same PPPM (1500 W), axial DO-201 package (through-hole, larger board area, manual assembly). | Not compatible with automated SMT lines; less suitable for high-density automotive PCBs. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CAHM3/H uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W surge rating-making it the only option qualified for production automotive electronics requiring zero-layout change and validated reliability.
Availability
1.5SMC20CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLCs, telecom infrastructure equipment, and consumer power adapters requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC20CAHM3/H 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 automotive qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and 1500 W surge resilience.
FAQ
What is the clamping voltage of the 1.5SMC20CAHM3/H under maximum surge current?
The 1.5SMC20CAHM3/H clamps to 32.4 V at its peak pulse current of 46.2 A (10/1000 µs waveform). This value is measured per standard test conditions and guarantees that protected downstream circuitry will not experience voltages exceeding 32.4 V during a full 1500 W transient event. The clamping ratio (VC/VBR) is 1.46, confirming tight voltage control relative to its 22.2 V minimum breakdown threshold.
Is the 1.5SMC20CAHM3/H suitable for automotive applications?
Yes, the 1.5SMC20CAHM3/H is AEC-Q101 qualified (denoted by the HM3 suffix), meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and ESD per AEC-Q101 Rev G. It is explicitly intended for automotive use cases such as sensor protection, infotainment power rails, and body control modules where reliability under thermal and electrical stress is mandatory.
Does the 1.5SMC20CAHM3/H have polarity markings on the package?
No, the 1.5SMC20CAHM3/H is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Its symmetrical construction means both terminals function identically - either can serve as anode or cathode depending on transient polarity. This eliminates orientation errors during automated placement and simplifies PCB layout verification.
What is the thermal resistance of the 1.5SMC20CAHM3/H, and how does it affect PCB layout?
The 1.5SMC20CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. These values assume mounting on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, designers must provide adequate copper area and avoid excessive trace length between the device and thermal planes - especially critical in automotive under-hood applications where ambient temperatures exceed 105 °C.
How does the 1.5SMC20CAHM3/H compare to unidirectional TVS diodes like 1.5SMC20A in circuit implementation?
Unlike the unidirectional 1.5SMC20A, the 1.5SMC20CAHM3/H provides symmetrical clamping for both positive and negative transients without requiring external polarity alignment. This makes it ideal for AC-coupled lines, differential buses (e.g., RS-485), or floating grounds where voltage reversals occur. The unidirectional version requires correct cathode orientation and cannot protect against reverse-polarity surges unless paired with another device - increasing BOM count and layout complexity.
1.5SMC20CAHM3/H 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20CAHM3/H FAQ
1.How can I place an order for 1.5SMC20CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CAHM3/H 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 1.5SMC20CAHM3/H reliable?
The price and inventory of 1.5SMC20CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CAHM3/H?
1.5SMC20CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CAHM3/H 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 1.5SMC20CAHM3/H?
For technical support, including 1.5SMC20CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC20CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CAHM3/H 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 1.5SMC20CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CAHM3/H?
All 1.5SMC20CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CAHM3/H, 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 1.5SMC20CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC20CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CAHM3/H Tags
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