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Vishay General Semiconductor - Diodes Division 1.5SMC18AHM3_A/H
- Part No.:
- 1.5SMC18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,430
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Product details
Overview
1.5SMC18AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power with 10/1000 μs waveform, 17.1–18.9 V breakdown voltage at 1 mA test current, and 15.3 V stand-off voltage - deployed to protect automotive-grade power rails and signal lines against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC18AHM3_A/H datasheet, 1.5SMC18AHM3_A/H pinout, 1.5SMC18AHM3_A/H application, or 1.5SMC18AHM3_A/H equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified clamping performance (25.2 V max at 59.5 A), low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive ECUs and industrial motor drives.
Technical Context
The 1.5SMC18AHM3_A/H operates as a unidirectional avalanche-clamping device, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and stable breakdown behavior under repetitive 10/1000 μs transients. Its cathode-band polarity marking enables unambiguous PCB orientation during automated placement.
Designed for operation across –65 °C to +150 °C junction temperature range, it delivers 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient and maintains clamping integrity up to 200 A non-repetitive forward surge current (8.3 ms half-sine), meeting UL 497B protector classification requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy ESD and lightning surges without failure |
| Breakdown Voltage (VBR) | 17.1–18.9 V at 1 mA - defines precise avalanche onset threshold for reliable overvoltage triggering |
| Stand-off Voltage (VWM) | 15.3 V - ensures no conduction during normal 12 V automotive rail operation |
| Max Clamping Voltage (VC) | 25.2 V at 59.5 A - limits downstream IC voltage stress during worst-case transient |
| Junction Temperature Range | –65 °C to +150 °C - supports under-hood automotive deployment and industrial thermal cycling |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test standard, including temperature cycling and HTRB |
| Package | SMC (DO-214AB) - industry-standard 8.13 mm × 6.22 mm surface-mount outline with matte tin leads |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case with UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); conducts only during overvoltage event |
| Cathode | Current exit point during clamping; marked with band | Connected to ground reference; establishes unidirectional conduction path to shunt surge energy |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive use including temperature cycling, HTRB, and mechanical shock per JEDEC standards |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Low incremental surge resistance | Minimizes VC – VBR differential, reducing voltage overshoot during fast-rising transients |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of BCM microcontrollers from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp >35 V spikes within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs while maintaining <15.3 V nominal rail integrity during normal operation. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced surges (IEC 61000-4-4 EFT). IC Role / Device Role / Timing Role: Standoff-connected TVS absorbing repetitive 5 kV/5 kHz burst energy before reaching optocoupler input stage. Use Value: Extends mean time between failures (MTBF) by eliminating false triggering and input-stage degradation in factory automation environments. |
| Automotive Infotainment Power Supply | Telecom Base Station DC Feeder Line |
|
Use Scenario: Safeguarding USB-C PD and HDMI power delivery circuits in head units against battery reverse-connection and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device on 5 V/9 V/15 V buck converter outputs, coordinated with secondary ceramic capacitors. Use Value: Ensures compliance with ISO 16750-2 (12 V system, 100 V/50 ms surge) without requiring oversized input filters or derated converters. |
Use Scenario: Protecting -48 V DC feeder lines feeding remote radio units from lightning-induced common-mode surges on outdoor cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at equipment entry point, referenced to local ground plane with low-inductance layout. Use Value: Limits voltage excursion to <25.2 V during 10/1000 μs events, preventing damage to PoE-like DC-DC isolators and monitoring ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/57T | Same 18 V VWM, but 400 W PPPM rating and SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients (IEC 61000-4-2 contact discharge only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal derating at 125 °C ambient |
| 1.5KE18A | Through-hole DO-201 package, identical 1500 W rating and 17.1–18.9 V VBR, but no AEC-Q101 qualification | Not approved for automotive production; requires manual insertion and wave soldering | Use only in non-automotive industrial prototypes where reflow compatibility and qualification are not required |
Compared with SMAJ18A-E3/57T and 1.5KE18A, the 1.5SMC18AHM3_A/H uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W surge capability - making it the only option qualified for volume automotive production with automated assembly and high-energy transient immunity.
Availability
1.5SMC18AHM3_A/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, infotainment power supplies, and telecom DC feeder protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for 1.5SMC18AHM3_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 harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC18AHM3_A/H at its rated peak pulse current?
The 1.5SMC18AHM3_A/H has a maximum clamping voltage (VC) of 25.2 V at 59.5 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per Fig. 1 and Table 1 in Vishay Document 88303 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC18AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC18AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC18AHM3_A/H is AEC-Q101 qualified (denoted by the HM3 suffix), halogen-free, and RoHS-compliant - explicitly designed for automotive use per Vishay's ordering information and qualification documentation. It meets requirements for under-hood and cabin-mounted ECUs, including thermal cycling, high-temperature reverse bias (HTRB), and mechanical shock testing. The 1.5SMC18AHM3_A/H is specified for operation from –65 °C to +150 °C junction temperature.
What does the "_A/H" suffix in 1.5SMC18AHM3_A/H indicate?
The "_A/H" suffix in 1.5SMC18AHM3_A/H specifies two attributes: "A" denotes AEC-Q101 qualification for the 6.8 V to 220 V voltage range (per Document 88303 Note 1), and "H" indicates packaging in 7-inch diameter plastic tape and reel with 850 units per reel (per Ordering Information table). The "HM3" portion confirms halogen-free, RoHS-compliant construction. The 1.5SMC18AHM3_A/H thus combines automotive qualification, environmental compliance, and standard SMT packaging.
How does the 1.5SMC18AHM3_A/H compare to bidirectional TVS diodes like 1.5SMC18CA?
The 1.5SMC18AHM3_A/H is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC18CA is bidirectional with no polarity marking and symmetric clamping in both directions. The 1.5SMC18AHM3_A/H has a 15.3 V stand-off voltage (VWM) and is intended for DC rail protection (e.g., 12 V automotive), while 1.5SMC18CA supports AC-coupled or floating signal lines. Their breakdown voltages differ slightly due to test configuration - the 1.5SMC18AHM3_A/H is not interchangeable with 1.5SMC18CA without circuit redesign.
What is the thermal resistance from junction to ambient for the 1.5SMC18AHM3_A/H?
The typical thermal resistance from junction to ambient (RθJA) for the 1.5SMC18AHM3_A/H is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal), per Vishay Document 88303 Thermal Characteristics table. This value assumes natural convection cooling and is used to calculate junction temperature rise under steady-state power dissipation (e.g., 6.5 W → ΔT ≈ 488 °C, hence derating is essential). The 1.5SMC18AHM3_A/H also has RθJL = 15 °C/W for junction-to-leads conduction.
1.5SMC18AHM3_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):
- 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_A/H FAQ
1.How can I place an order for 1.5SMC18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18AHM3_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 1.5SMC18AHM3_A/H reliable?
The price and inventory of 1.5SMC18AHM3_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 1.5SMC18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18AHM3_A/H?
1.5SMC18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18AHM3_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 1.5SMC18AHM3_A/H?
For technical support, including 1.5SMC18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18AHM3_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 1.5SMC18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC18AHM3_A/H?
All 1.5SMC18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18AHM3_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 1.5SMC18AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18AHM3_A/H Tags
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