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Vishay General Semiconductor - Diodes Division 1.5SMC20AHM3_A/I
- Part No.:
- 1.5SMC20AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHM3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,847
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Product details
Overview
1.5SMC20AHM3_A/I 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 with 1500 W peak pulse power (10/1000 μs), 27.7 V clamping voltage at 54.2 A peak pulse current, and 17.1 V stand-off voltage - deployed on power rails and signal lines of automotive ECUs and industrial sensor interfaces.
For engineers reviewing the 1.5SMC20AHM3_A/I datasheet, 1.5SMC20AHM3_A/I pinout, 1.5SMC20AHM3_A/I application, or 1.5SMC20AHM3_A/I equivalent, key selection criteria include clamping performance under IEC 61000-4-5 surge conditions, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This device operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 19.0–21.0 V breakdown range (IT = 1.0 mA), clamping transients to ≤27.7 V while sustaining 54.2 A peak pulse current. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at 17.1 V).
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), features matte tin-plated leads, and delivers repeatable surge immunity with 0.01 % duty cycle capability - critical for protecting MOSFET gates and microcontroller I/O in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains IEC 61000-4-5 Level 4 surges without degradation |
| Stand-off Voltage (VWM) | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA |
| Breakdown Voltage (VBR) | 19.0–21.0 V at 1.0 mA - precise avalanche threshold for predictable turn-on |
| Clamping Voltage (VC) | 27.7 V at 54.2 A - limits transient voltage seen by downstream ICs during surge events |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
| Thermal Resistance (RθJA) | 75 °C/W - defines temperature rise above ambient at 6.5 W steady-state dissipation |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements (HM3 suffix) |
| Package | SMC (DO-214AB) - 0.320" × 0.246" footprint compatible with standard SMT pick-and-place |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional polarity marked by cathode band. Dimensions: 8.13 mm × 6.22 mm × 2.62 mm (L × W × H). Matte tin-plated terminals, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides return path for surge current during clamping; must be routed with low-inductance trace to ground plane |
| Cathode | Current exit terminal in reverse bias; connected to line being protected | Accepts transient energy from supply/signal line and shunts it to ground via anode; band marking identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and inductive switching spikes in 12 V/24 V systems |
| Glass passivated chip junction | Ensures long-term stability of breakdown voltage and low leakage drift over temperature and lifetime |
| AEC-Q101 qualified (HM3 suffix) | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains and end-of-life recycling |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking |
Applications
| Automotive Engine Control Unit (ECU) | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protects 12 V power input and sensor signal lines in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input, clamping transients before they reach voltage regulators and MCU power pins. Use Value: Limits voltage to ≤27.7 V during 100 V/50 ms load dump events, preventing latch-up or permanent damage to 3.3 V/5 V logic. |
Use Scenario: Shields CANH/CANL differential pair from ESD and fast transient bursts in factory automation PLCs. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on each bus line referenced to chassis ground, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains <100 pF junction capacitance to avoid signal integrity degradation at 1 Mbps CAN FD data rates. |
| Consumer Power Adapter Input Stage | Telecom Base Station DC Power Feed |
Use Scenario: Guards AC/DC adapter primary-side rectifier output against surges from mains transients and capacitor discharge. IC Role / Device Role / Timing Role: Placed across bulk capacitor terminals to clamp overvoltage spikes before they stress switching FETs or optocouplers. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), surviving repeated 1.2/50 μs line surges without parametric shift. |
Use Scenario: Installed on −48 V DC distribution board inputs to suppress induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Mounted directly at power entry point with short PCB traces to minimize inductive voltage overshoot during 10/1000 μs surges. Use Value: Delivers 1500 W clamping capacity with RθJL = 15 °C/W, enabling effective heat transfer to copper pour without external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Same VWM (17.1 V) and VC (27.7 V), but lower PPPM (400 W) and smaller SMA package (DO-214AC) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when space-constrained layouts prioritize footprint over surge margin |
| 1.5KE20A | Through-hole TO-204AA (DO-41) package; identical electrical specs but higher RθJA (100 °C/W) | Requires wave soldering; incompatible with fully SMT production; less suitable for high-vibration environments | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ20A-E3/57T and 1.5KE20A, the 1.5SMC20AHM3_A/I provides superior surge handling (1500 W vs. 400 W or 1500 W with through-hole limitations), AEC-Q101 qualification, and SMT-ready MSL Level 1 packaging - making it the preferred choice for volume automotive and industrial production.
Availability
1.5SMC20AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial CAN interface protection, and telecom DC power feed applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC20AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping voltage, and automated assembly compatibility are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20AHM3_A/I at its rated peak pulse current?
The 1.5SMC20AHM3_A/I has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuits during surge events. The 1.5SMC20AHM3_A/I maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC20AHM3_A/I qualified for automotive use?
Yes, the 1.5SMC20AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026, Doc. #88303). It undergoes stress testing for temperature cycling, humidity, and mechanical shock per AEC-Q101 standards, making it suitable for under-hood and body-control module applications. The 1.5SMC20AHM3_A/I is explicitly listed in the "AEC-Q101 qualified available" section of the datasheet.
What does the "HM3" suffix indicate in 1.5SMC20AHM3_A/I?
The "HM3" suffix in 1.5SMC20AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table (page 3), HM3 parts meet JESD 201 Class 2 whisker resistance and are rated for MSL Level 1 reflow (260 °C peak). The "_A/I" further specifies tape-and-reel packaging in 13-inch reels (3500 units), distinguishing it from 7-inch reel variants.
How does the 1.5SMC20AHM3_A/I compare to bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20AHM3_A/I is unidirectional and optimized for DC line protection where polarity is fixed (e.g., +12 V supply rails), offering tighter leakage control (<1.0 μA at VWM) and lower capacitance than bidirectional equivalents. In contrast, 1.5SMC20CA supports AC or floating signal lines but exhibits higher reverse leakage and symmetric clamping. The 1.5SMC20AHM3_A/I should not be substituted for 1.5SMC20CA without verifying circuit polarity and transient directionality.
What is the thermal resistance and maximum power dissipation of the 1.5SMC20AHM3_A/I?
The 1.5SMC20AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a steady-state power dissipation (PD) rating of 6.5 W at TA = 50 °C on infinite heatsink conditions. These values are defined in the "THERMAL CHARACTERISTICS" table (page 3) and govern derating curves for elevated ambient temperatures. The 1.5SMC20AHM3_A/I requires adequate copper pad area (0.31" × 0.31") to achieve published thermal performance.
1.5SMC20AHM3_A/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:
- 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/I FAQ
1.How can I place an order for 1.5SMC20AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHM3_A/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 1.5SMC20AHM3_A/I reliable?
The price and inventory of 1.5SMC20AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHM3_A/I?
1.5SMC20AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHM3_A/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 1.5SMC20AHM3_A/I?
For technical support, including 1.5SMC20AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC20AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHM3_A/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 1.5SMC20AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHM3_A/I?
All 1.5SMC20AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHM3_A/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 1.5SMC20AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC20AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20AHM3_A/I Tags
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