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Vishay General Semiconductor - Diodes Division 1.5SMC20AHM3/H
- Part No.:
- 1.5SMC20AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHM3/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,909
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Product details
Overview
1.5SMC20AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), clamping voltage of 27.7 V at 54.2 A, and operates across -65 °C to +150 °C junction temperature - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC20AHM3/H datasheet, 1.5SMC20AHM3/H pinout, 1.5SMC20AHM3/H application, or 1.5SMC20AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance under standardized surge waveforms, and direct alternative part comparisons for robust ESD/surge protection design-in.
Technical Context
The 1.5SMC20AHM3/H uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of transient overvoltages induced by inductive switching or lightning surges. Its unidirectional polarity supports DC-biased signal paths with cathode-band marking.
Rated for 1500 W peak pulse power per 10/1000 μs waveform at 0.01% duty cycle, it delivers 27.7 V clamping voltage at 54.2 A IPPM while maintaining 1.0 μA max reverse leakage at 17.1 V. Thermal design is supported by RθJL = 15 °C/W and MSL Level 1 moisture sensitivity rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (Breakdown) | 19.0–21.0 V at 1.0 mA - Voltage range where avalanche conduction initiates reliably; ensures consistent turn-on across production lots. |
| VC (Clamping) | 27.7 V at 54.2 A - Peak voltage seen by downstream circuit during 10/1000 μs surge; determines minimum IC withstand rating required. |
| PPPM | 1500 W - Surge energy handling capacity under standard waveform; enables protection against IEC 61000-4-5 Level 4 transients. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm copper pads; informs PCB thermal layout requirements. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; establishes reference for unidirectional clamping action. |
| Cathode | Avalanche conduction terminal / Clamping output | Banded end; sinks surge current to ground or return path when reverse voltage exceeds VWM; defines clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients per IEC 61000-4-5, reducing need for cascaded TVS or external filtering. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, ADAS sensor interfaces, and body electronics. |
| Low profile SMC package | 0.320" × 0.246" footprint with 0.126" height - fits dense PCB layouts while maintaining thermal mass for surge dissipation. |
| Glass passivated junction | Improves long-term stability and reduces parameter drift under thermal cycling and humidity exposure vs. epoxy-passivated alternatives. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT manufacturing and eliminates pre-bake steps. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input pins. Use Value: Withstands 1500 W surges while limiting clamped voltage to 27.7 V - below typical 30 V absolute maximum ratings of automotive-grade op-amps and transceivers. |
Use Scenario: Shielding digital input channels on programmable logic controllers from field-induced surges caused by relay coil switching or motor drive noise. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V DC input terminals, absorbing repetitive 10/1000 μs surges up to 54.2 A peak current. Use Value: Maintains <1.0 μA leakage at 17.1 V, preventing false triggering of optocoupler-based inputs while delivering rapid sub-nanosecond response. |
| Telecom Power Interface | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC converter inputs against lightning-induced surges on outdoor telecom equipment power rails. IC Role / Device Role / Timing Role: Primary surge clamp on 48 V supply line upstream of DC-DC regulation, coordinated with secondary TVS or MOV stages. Use Value: 27.7 V clamping at 54.2 A ensures downstream converters see no more than rated input stress, preserving efficiency and lifetime. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine motor inverters from commutation spikes generated by BLDC motor back-EMF. IC Role / Device Role / Timing Role: Localized TVS on low-voltage control signals (e.g., PWM enable, current sense feedback) referenced to MCU ground. Use Value: Glass-passivated junction ensures stable VBR over 10,000+ surge events - critical for high-volume white-goods with multi-year warranty 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 | Same VWM (17.1 V), lower PPPM (400 W), SMA package (smaller thermal mass, higher RθJA ≈ 100 °C/W). | Not AEC-Q101 qualified; suitable for commercial-grade consumer products but not automotive Tier-1 designs. | Select when cost or board space is prioritized over automotive qualification and 1500 W surge capability. |
| 1.5KE20A | Through-hole TO-204AA (DO-41); identical VWM/VBR/VC specs but larger footprint and manual assembly requirement. | Limited to non-automated production; unsuitable for high-density SMT lines or vibration-prone environments due to leaded construction. | Choose only if legacy through-hole compatibility or higher single-pulse energy margin (1.5 kW same rating) outweighs SMT process advantages. |
Compared with SMAJ20A and 1.5KE20A, the 1.5SMC20AHM3/H uniquely combines AEC-Q101 qualification, SMC surface-mount form factor, and full 1500 W surge rating - making it the preferred choice for new automotive and industrial SMT designs requiring validated reliability and high-power transient immunity.
Availability
1.5SMC20AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor controls requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC20AHM3/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, power handling, and automotive qualification.
The 1.5SMC Series was developed for high-energy, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and robust 1500 W surge immunity.
FAQ
What is the clamping voltage of the 1.5SMC20AHM3/H at its rated peak pulse current?
The 1.5SMC20AHM3/H has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current (IPPM), measured under the standard 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The 1.5SMC20AHM3/H maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC20AHM3/H qualified for automotive applications?
Yes, the 1.5SMC20AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. This makes the 1.5SMC20AHM3/H suitable for use in automotive powertrain, chassis, and ADAS systems where reliability under thermal and electrical stress is mandatory.
What does the "HM3" suffix indicate in 1.5SMC20AHM3/H?
The "HM3" suffix in 1.5SMC20AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates packaging in 7-inch tape-and-reel (850 units per reel), while "M3" confirms compliance with JEDEC MSL Level 1 and whisker resistance per JESD 201 Class 2. This distinguishes it from commercial-grade "E3" or non-automotive "M3" variants and assures suitability for high-reliability automotive and industrial deployments.
How does the thermal performance of the 1.5SMC20AHM3/H compare to smaller packages like SMAJ?
The 1.5SMC20AHM3/H offers superior thermal performance versus SMAJ-series devices, with a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on recommended 8.0 mm × 8.0 mm copper pads - compared to ~100 °C/W for SMAJ20A. This 25% lower RθJA allows the 1.5SMC20AHM3/H to sustain higher average surge repetition rates and maintain lower junction temperatures during prolonged transient activity, directly enhancing long-term reliability in thermally constrained layouts.
Can the 1.5SMC20AHM3/H be used in bidirectional configurations?
No, the 1.5SMC20AHM3/H is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional operation requires a "CA" suffix part (e.g., 1.5SMC20CA). Using the 1.5SMC20AHM3/H in AC-coupled or floating signal paths would result in forward conduction during negative half-cycles, potentially damaging the device or distorting signals. Always match polarity type to circuit topology - the 1.5SMC20AHM3/H is strictly for DC-biased, grounded-return applications.
1.5SMC20AHM3/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:
- 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/H FAQ
1.How can I place an order for 1.5SMC20AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHM3/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/H reliable?
The price and inventory of 1.5SMC20AHM3/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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHM3/H?
1.5SMC20AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHM3/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/H?
For technical support, including 1.5SMC20AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC20AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHM3/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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHM3/H?
All 1.5SMC20AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHM3/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/H part is unused and in its original packaging.
Return procedure for 1.5SMC20AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20AHM3/H Tags
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