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Vishay General Semiconductor - Diodes Division 1.5SMC18AHM3/H
- Part No.:
- 1.5SMC18AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18AHM3/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,077
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Product details
Overview
1.5SMC18AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), and clamps transients to ≤25.2 V at 59.5 A peak pulse current - ideal for safeguarding automotive sensor signal lines against inductive switching surges.
For engineers reviewing the 1.5SMC18AHM3/H datasheet, 1.5SMC18AHM3/H pinout, 1.5SMC18AHM3/H application, or 1.5SMC18AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction temperature limit (TJ = 150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The 1.5SMC18AHM3/H operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated silicon junction technology for fast response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power capability is specified under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, derated above TA = 25 °C per Fig. 2.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020, with maximum lead finish temperature of 260 °C, and is qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1.0 mA - defines precise breakdown threshold for reliable clamping onset |
| VWM | 15.3 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during full 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 μs) - peak surge energy handling capacity for lightning and ESD events |
| IFSM | 200 A (8.3 ms half-sine) - surge current tolerance for short-duration inductive load switching |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance indicating required PCB copper area (0.31" × 0.31") for safe power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity marked with cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side reference; enables unidirectional clamping to GND |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., CAN_H, LIN, sensor supply); defines clamping direction toward GND |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients including ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems |
| AEC-Q101 qualified | Validated reliability for automotive-grade deployment in engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for global automotive OEMs and industrial equipment manufacturers |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp referenced to chassis ground, absorbing positive-going transients before they reach ADC input or op-amp buffer. Use Value: Limits voltage excursion to ≤25.2 V during 1500 W surges, preserving sensor signal integrity and preventing microcontroller reset or latch-up. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers subjected to field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between input terminal and common rail, conducting only when transient exceeds 15.3 V. Use Value: Withstands repetitive 200 A surge (8.3 ms) and maintains <1 μA leakage at 15.3 V, ensuring stable logic-level recognition during normal operation. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional-capable family member used unidirectionally to clamp differential-mode transients on VCC-to-signal paths. Use Value: Fast <1 ns response and 25.2 V clamping prevent damage to ±12 V transceiver rails while maintaining signal fidelity up to 10 Mbps. |
Use Scenario: Secondary-side overvoltage suppression on 19 V laptop adapter outputs, guarding against feedback loop failure or regulator dropout. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-VOUT, clamping positive excursions beyond 15.3 V. Use Value: 1500 W rating absorbs sustained overvoltage events without thermal runaway, complementing primary-side OVP and meeting UL 62368-1 surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VBR range (17.1–18.9 V), lower PPPM = 600 W, SMB (DO-214AA) package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-repetition industrial surges | Select when board space is constrained and peak surge energy remains below 600 W. |
| 1.5KE18A | Through-hole TO-204AE (DO-201AE) package, identical VBR/VC specs, PPPM = 1500 W, but no AEC-Q101 qualification | Not qualified for automotive use; requires wave soldering or hand assembly; higher thermal mass but less automated placement compatibility | Choose for legacy through-hole designs or cost-sensitive non-automotive industrial applications where AEC-Q101 is not mandated. |
Compared with SMBJ18A and 1.5KE18A, the 1.5SMC18AHM3/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, halogen-free construction, and SMC package compatibility with high-volume SMT lines - making it the preferred choice for new automotive and industrial designs requiring both performance and compliance.
Availability
1.5SMC18AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, telecom line interface shielding, and consumer power adapter output clamping requiring stable component supply across production lifecycles.
Supply support for 1.5SMC18AHM3/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, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 validation, and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of the 1.5SMC18AHM3/H at its rated peak pulse current?
The 1.5SMC18AHM3/H clamps to a maximum of 25.2 V at its rated peak pulse current of 59.5 A (10/1000 μs waveform). This value is measured under standardized test conditions with the device mounted on 0.31" × 0.31" copper pads per JEDEC guidelines, ensuring consistent overvoltage limiting behavior in production designs.
Is the 1.5SMC18AHM3/H qualified for automotive applications?
Yes, the 1.5SMC18AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and lifetime surge stress testing - making it suitable for engine control units, body modules, and ADAS sensor interfaces.
What does the "H" in the 1.5SMC18AHM3/H part number signify?
The final "H" in 1.5SMC18AHM3/H denotes the tape-and-reel packaging option: 7-inch diameter plastic tape and reel containing 850 units. This format is optimized for high-speed pick-and-place assembly and aligns with industry-standard SMT logistics for volume manufacturing.
How does the 1.5SMC18AHM3/H differ from the non-HM3 version like 1.5SMC18A-E3?
The 1.5SMC18AHM3/H differs from 1.5SMC18A-E3 in three key ways: it uses halogen-free molding compound (vs. standard RoHS), carries AEC-Q101 qualification (vs. commercial grade only), and is supplied in 7" tape-and-reel (vs. E3's 7" or 13" options). All electrical specs - including VBR, VC, and PPPM - remain identical across these variants.
What is the maximum operating junction temperature for the 1.5SMC18AHM3/H?
The maximum operating junction temperature for the 1.5SMC18AHM3/H is +150 °C, as specified in the Absolute Maximum Ratings table. This allows reliable operation in under-hood automotive environments and high-ambient industrial enclosures, provided PCB thermal design maintains junction temperature within this limit using the documented RθJA = 75 °C/W.
1.5SMC18AHM3/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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
1.5SMC18AHM3/H FAQ
1.How can I place an order for 1.5SMC18AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18AHM3/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 1.5SMC18AHM3/H reliable?
The price and inventory of 1.5SMC18AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC18AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC18AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18AHM3/H?
1.5SMC18AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18AHM3/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 1.5SMC18AHM3/H?
For technical support, including 1.5SMC18AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC18AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18AHM3/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 1.5SMC18AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC18AHM3/H?
All 1.5SMC18AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18AHM3/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 1.5SMC18AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC18AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18AHM3/H Tags
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