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Vishay General Semiconductor - Diodes Division 1.5SMC20CAHM3_A/H
- Part No.:
- 1.5SMC20CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CAHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,787
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Product details
Overview
1.5SMC20CAHM3_A/H 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 20 V standoff voltage (VWM), 22.8 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), and 27.7 V maximum clamping voltage (VC) at 54.2 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC20CAHM3_A/H datasheet, 1.5SMC20CAHM3_A/H pinout, 1.5SMC20CAHM3_A/H application, or 1.5SMC20CAHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under standardized surge waveforms, and real-world use context for ESD/lightning transient protection in high-reliability embedded systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR (22.8–25.2 V), VWM (20 V), and VC (27.7 V) specifications in forward and reverse directions. Its glass-passivated junction ensures stable avalanche characteristics and low leakage (<1.0 μA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
The device delivers 1500 W peak pulse power handling per 10/1000 μs waveform at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It is halogen-free, RoHS-compliant, and AEC-Q101 qualified - meeting automotive-grade reliability requirements for under-hood and chassis-mounted electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8 V min / 25.2 V max at 1 mA - precise avalanche onset range ensuring predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.7 V at 54.2 A IPPM - limits downstream voltage stress during 10/1000 μs surge, protecting 3.3 V/5 V/12 V ICs and MOSFETs. |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capability under standardized lightning/surge test waveform (IEC 61000-4-5 compliant). |
| ID (Reverse Leakage) | <1.0 μA at 20 V - negligible standby current enabling low-power system compatibility without battery drain. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| RθJA | 75 °C/W - defines thermal derating behavior on standard PCB copper pads (8.0 mm × 8.0 mm per terminal). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band not marked (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | Accepts surge current during positive-going transients; connects to protected line or signal path. |
| Cathode | Transient current entry (negative polarity) | Accepts surge current during negative-going transients; symmetrical with anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.22) | Minimizes overvoltage exposure to downstream components - critical for protecting 3.3 V logic and analog front-ends. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free assembly processes without pre-baking or special handling. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance requirements for global automotive and industrial OEM supply chains. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing fast-rising transients before they reach sensitive ASIC inputs. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V interface ICs during vehicle battery disconnection events or alternator load dump. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on input terminal blocks, shunting surge energy directly to chassis ground before reaching optocoupler or microcontroller input stage. Use Value: Enables >100,000 switching cycles without degradation, maintaining functional safety integrity in factory automation systems. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding Ethernet PHY ports and RS-485 transceivers against lightning-induced surges on outdoor cabling in building management systems. IC Role / Device Role / Timing Role: First-line defense in multi-stage protection schemes, clamping common-mode transients before gas discharge tube or MOV secondary stages. Use Value: Limits peak voltage to ≤27.7 V during 10/1000 μs surges, preserving signal integrity and preventing PHY reset or data corruption. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge outputs to clamp inductive kickback during PWM switching. Use Value: Eliminates need for snubber RC networks, reducing BOM count and board space while maintaining EMC compliance. |
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 | Lower peak pulse power (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA = 95 °C/W). | Suitable for space-constrained consumer electronics but not automotive-grade surge levels. | Select when board area is critical and surge energy is ≤600 W; verify thermal margin on small pads. |
| 1.5KE20CA | Through-hole DO-201 package, identical electrical specs, higher mechanical robustness but no AEC-Q101 qualification. | Used in legacy industrial power supplies where reworkability and vibration resistance outweigh surface-mount density needs. | Choose for prototyping or repair scenarios requiring hand-soldering; avoid in new automotive designs lacking AEC-Q101. |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CAHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC package thermal performance - making it the only option among the three validated for production automotive ECUs requiring zero-defect reliability under sustained thermal cycling and high-energy transients.
Availability
1.5SMC20CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1.5SMC20CAHM3_A/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, rectifiers, TVS devices, and power MOSFETs for high-reliability applications.
The 1.5SMC Series was engineered specifically for robust transient suppression in automotive, industrial, and telecom environments - emphasizing AEC-Q101 compliance, high pulse power density, and stable clamping performance across temperature.
FAQ
What does the "HM3" suffix indicate in 1.5SMC20CAHM3_A/H?
The "HM3" suffix in 1.5SMC20CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards and environmental regulations - distinct from commercial-grade "M3" or non-automotive "E3" variants. This makes 1.5SMC20CAHM3_A/H suitable for under-hood and safety-critical applications where material content and lifetime validation are mandatory.
Is 1.5SMC20CAHM3_A/H unidirectional or bidirectional?
1.5SMC20CAHM3_A/H is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and circuits where voltage transients may swing above or below ground. Unlike unidirectional "A" versions, it has no polarity marking and requires no orientation during placement.
What is the maximum clamping voltage of 1.5SMC20CAHM3_A/H at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC20CAHM3_A/H is 27.7 V at 54.2 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the highest voltage imposed on protected circuitry during worst-case surge events - critical for ensuring compatibility with 3.3 V, 5 V, or 12 V ICs and preventing overvoltage damage to downstream components.
Does 1.5SMC20CAHM3_A/H require heatsinking for 1500 W surge handling?
No external heatsink is required for single-event 1500 W surge handling in 1.5SMC20CAHM3_A/H, as its energy absorption is transient (≤50 ms pulse width). However, thermal design must follow Vishay's recommended 8.0 mm × 8.0 mm copper pad layout per terminal to achieve the specified RθJA of 75 °C/W. Repeated surges or high ambient temperatures necessitate verification of junction temperature rise using derating curves in the datasheet.
How does the AEC-Q101 qualification impact the use of 1.5SMC20CAHM3_A/H in industrial designs?
AEC-Q101 qualification for 1.5SMC20CAHM3_A/H validates its reliability under accelerated stress tests (e.g., temperature cycling, humidity bias, HTRB), making it suitable not only for automotive but also for demanding industrial applications such as factory automation, renewable energy inverters, and railway signaling - where extended lifetime, zero infant mortality, and proven failure mode analysis are required. Its qualification adds confidence beyond standard industrial-grade TVS diodes.
1.5SMC20CAHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for 1.5SMC20CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CAHM3_A/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_A/H reliable?
The price and inventory of 1.5SMC20CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CAHM3_A/H?
1.5SMC20CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CAHM3_A/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_A/H?
For technical support, including 1.5SMC20CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC20CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CAHM3_A/H?
All 1.5SMC20CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC20CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CAHM3_A/H Tags
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