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Vishay General Semiconductor - Diodes Division 1.5SMC20AHM3_A/H
- Part No.:
- 1.5SMC20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,013
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Product details
Overview
1.5SMC20AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V stand-off voltage (VWM), clamps transients to ≤27.7 V at 54.2 A peak pulse current (10/1000 μs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and housed in an SMC (DO-214AB) package - widely used in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the 1.5SMC20AHM3_A/H datasheet, 1.5SMC20AHM3_A/H pinout, 1.5SMC20AHM3_A/H application, or 1.5SMC20AHM3_A/H equivalent, key selection criteria include its unidirectional polarity, 1500 W surge rating, 27.7 V clamping performance at rated IPPM, AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per HM3 suffix.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (19.0–21.0 V), limiting transient energy to protected downstream circuitry. Its low incremental surge resistance and fast response time ensure effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The 1.5SMC20AHM3_A/H uses a glass-passivated silicon junction and is rated for 150 °C maximum junction temperature. It meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and supports repetitive surge duty cycles up to 0.01 % at 10/1000 μs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise avalanche onset window for reliable clamping initiation |
| VWM | 17.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 27.7 V at 54.2 A - clamping voltage under 1500 W 10/1000 μs surge, directly limits stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capability, enabling protection against severe transients like ISO 7637-2 Pulse 5a |
| IFSM | 200 A - 8.3 ms single half-sine surge rating, supports high-energy inductive load switching events |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode (unmarked end) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial manufacturing without compromising surge robustness |
| 1500 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients such as load dump and ISO 16750-2 pulses in 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing risk of damage to sensitive 3.3 V or 5 V logic interfaces |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver power rails from load-dump transients and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground, acting as a voltage-clamping shunt during overvoltage events. Use Value: Clamps 12 V rail transients to ≤27.7 V, preventing latch-up or permanent damage to 3.3 V/5 V logic-level components downstream. |
Use Scenario: Shields 24 V digital input circuits in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role: Standoff-rated TVS mounted across input terminals to suppress common-mode transients before signal conditioning stage. Use Value: Withstands 1500 W surges while maintaining 17.1 V working voltage, ensuring stable operation during factory floor EMI events. |
| Automotive Sensor Interface (e.g., ABS wheel speed) | Telecom Power Supply Ingress Protection |
Use Scenario: Safeguards analog front-end circuitry of magnetic sensors exposed to ignition noise and battery disconnect transients. IC Role / Device Role: Low-capacitance unidirectional TVS placed at connector entry point to divert fast-rising edge transients. Use Value: Fast response time and 27.7 V clamping prevent false triggering or offset drift in precision analog signal paths. |
Use Scenario: Installed at AC/DC converter input to absorb lightning-induced surges entering via telecom power feed lines. IC Role / Device Role: Primary-stage TVS in multi-tier protection scheme, absorbing bulk surge energy before MOV and filter stages. Use Value: 1500 W rating and 200 A IFSM enable compliance with ITU-T K.20 and IEC 61000-4-5 Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Same VBR range (19.0–21.0 V), but lower PPPM = 400 W and non-AEC-Q101 rated | Not suitable for automotive under-hood use; limited to commercial-grade consumer or office equipment | Select only if cost sensitivity outweighs automotive qualification and surge robustness requirements |
| 1.5KE20A | Through-hole TO-204AA (DO-41) package; identical VBR, VC, and PPPM, but no AEC-Q101 or halogen-free certification | Requires PCB through-hole layout; incompatible with automated SMT lines and high-density automotive modules | Consider only for legacy through-hole designs where rework to SMC is not feasible |
Compared with SMAJ20A-E3/57T and 1.5KE20A, the 1.5SMC20AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and SMC surface-mount compatibility - making it the only option among the three qualified for new automotive electronics production with full RoHS and reliability compliance.
Availability
1.5SMC20AHM3_A/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC inputs, sensor interface protection, and telecom power ingress requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC20AHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20AHM3_A/H under maximum rated surge current?
The 1.5SMC20AHM3_A/H clamps to a maximum of 27.7 V when subjected to its rated peak pulse current of 54.2 A (10/1000 μs waveform). This value is measured per standardized test conditions defined in the Vishay datasheet and reflects actual worst-case voltage seen by protected circuitry during surge events.
Is the 1.5SMC20AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC20AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - both required for automotive electronics. Its 150 °C maximum junction temperature and MSL Level 1 rating further validate its suitability for under-hood and chassis-mounted modules.
What does the "HM3" suffix mean in 1.5SMC20AHM3_A/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant packaging with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. The "_A/H" indicates revision A in a 7-inch tape-and-reel format (850 units per reel), per Vishay's ordering nomenclature.
How does the 1.5SMC20AHM3_A/H differ from the 1.5SMC20A-E3/57T?
The 1.5SMC20AHM3_A/H adds AEC-Q101 qualification and halogen-free material content versus the commercial-grade 1.5SMC20A-E3/57T. Both share identical electrical specs (VBR, VC, PPPM) and SMC package, but only the HM3 version is approved for automotive production use.
What is the maximum operating temperature for the 1.5SMC20AHM3_A/H?
The 1.5SMC20AHM3_A/H has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of –65 °C to +150 °C. This allows deployment in high-ambient environments such as engine compartments or industrial motor drives without derating concerns below rated power.
1.5SMC20AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC20AHM3_A/H FAQ
1.How can I place an order for 1.5SMC20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHM3_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 1.5SMC20AHM3_A/H reliable?
The price and inventory of 1.5SMC20AHM3_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 1.5SMC20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHM3_A/H?
1.5SMC20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHM3_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 1.5SMC20AHM3_A/H?
For technical support, including 1.5SMC20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHM3_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 1.5SMC20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHM3_A/H?
All 1.5SMC20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHM3_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 1.5SMC20AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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