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Vishay General Semiconductor - Diodes Division 1.5SMC300AHM3_A/H
- Part No.:
- 1.5SMC300AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC300AHM3_A/H.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC300AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 300 V standoff voltage (VWM), 344 V breakdown voltage (VBR min), and 414 V clamping voltage (VC) at 3.6 A peak pulse current (IPPM), delivering 1500 W peak pulse power with 10/1000 µs waveform for automotive-grade surge protection of power rails and signal lines.
For engineers reviewing the 1.5SMC300AHM3_A/H datasheet, 1.5SMC300AHM3_A/H pinout, 1.5SMC300AHM3_A/H application, or 1.5SMC300AHM3_A/H equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS diode supports high-reliability design in automotive electronics, industrial power supplies, and telecom infrastructure where robust ESD and lightning transient suppression is required.
Technical Context
This unidirectional TVS operates as a voltage-clamping device that remains non-conductive below its 300 V stand-off voltage (VWM) and rapidly transitions to low-impedance conduction above its 344–375 V breakdown range (VBR), limiting transient-induced overvoltage to ≤414 V at 3.6 A. Its glass-passivated junction ensures stable avalanche performance under repetitive surges.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown) | 344–375 V at 1 mA - Confirmed avalanche initiation range ensuring predictable turn-on threshold |
| VC (Clamping) | 414 V at IPPM = 3.6 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs transient |
| PPPM | 1500 W - Surge energy handling capacity with standard lightning/surge waveform compliance |
| IR (Leakage) | 1.0 µA max at VWM - Negligible standby power loss and minimal loading on sensitive source circuits |
| TJ max | +150 °C - Enables deployment in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD stress |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in reverse-biased clamping configuration | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity without derating in standard PCB layouts |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive powertrain and body electronics with zero early-life failure risk |
| Halogen-free & RoHS-compliant | Meets EU ELV and automotive OEM material restrictions without compromising surge performance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response time) |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free soldering without moisture-related popcorn failure |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input Stage |
|---|---|
Use Scenario: Protecting 24 V/48 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges above 300 V. Use Value: Limits peak rail voltage to ≤414 V, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding programmable logic controller (PLC) power inputs exposed to inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 1500 W surges induced by contactor coil de-energization. Use Value: Maintains system uptime by eliminating field failures caused by cumulative transient stress on input rectifiers. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias rails in outdoor base station equipment from lightning-induced surges. IC Role / Device Role / Timing Role: High-VWM TVS suppressing common-mode transients coupled onto 48 V PoE or bias rails. Use Value: Prevents latch-up and burnout in PHY ICs while meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Clamping voltage spikes on photovoltaic string inputs during rapid irradiance changes or grid fault clearing events. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted across DC link capacitor terminals to absorb >1 kV transients. Use Value: Extends capacitor lifetime and avoids false triggering of overvoltage protection in solar inverters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300AHE3_A/H | Same VWM/VBR/VC ratings but SMB package (DO-214AA); lower PPPM (600 W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a compliance | Select only when board space is constrained and surge threat level is ≤600 W |
| 1.5KE300A | Through-hole TO-204AE (DO-201AE); identical electrical specs but larger footprint and manual assembly | Used in legacy industrial designs where SMT is not feasible or rework tolerance is critical | Choose when mechanical robustness or hand-soldering capability outweighs automated placement needs |
Compared with SMBJ300AHE3_A/H and 1.5KE300A, the 1.5SMC300AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package - making it the only option for new automotive SMT designs requiring full ISO 7637-2 compliance without through-hole compromises.
Availability
1.5SMC300AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial power systems, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for 1.5SMC300AHM3_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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments, emphasizing AEC-Q101 qualification, high-power surge handling, and halogen-free compliance for next-generation vehicle electronics.
FAQ
What is the clamping voltage of the 1.5SMC300AHM3_A/H under maximum rated surge current?
The 1.5SMC300AHM3_A/H has a maximum clamping voltage (VC) of 414 V when subjected to its rated peak pulse current (IPPM) of 3.6 A using the standard 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 circuitry during worst-case transient events. The 1.5SMC300AHM3_A/H maintains this clamping performance across its operational temperature range.
Is the 1.5SMC300AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC300AHM3_A/H is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD validation required for automotive powertrain and body electronics. Its 1500 W surge rating and 150 °C maximum junction temperature make the 1.5SMC300AHM3_A/H appropriate for under-hood and chassis-mounted modules subject to ISO 7637-2 transients.
How does the 1.5SMC300AHM3_A/H differ from the non-HM3 version?
The 1.5SMC300AHM3_A/H carries the HM3 suffix, signifying halogen-free, RoHS-compliant construction and AEC-Q101 qualification - features absent in standard M3 or E3 variants. While electrical parameters remain identical, the 1.5SMC300AHM3_A/H undergoes additional automotive-specific reliability screening and uses environmentally compliant molding compounds, making it mandatory for Tier 1 automotive BOMs where material content and qualification are audited.
What is the thermal resistance of the 1.5SMC300AHM3_A/H in typical mounting conditions?
The 1.5SMC300AHM3_A/H exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, and a junction-to-leads resistance (RθJL) of 15 °C/W. These values enable accurate thermal modeling for sustained power dissipation up to 6.5 W and ensure safe operation within the -65 °C to +150 °C junction temperature range specified for the 1.5SMC300AHM3_A/H.
Can the 1.5SMC300AHM3_A/H be used in bidirectional configurations?
No, the 1.5SMC300AHM3_A/H is a unidirectional TVS diode, as confirmed by its part number suffix "A" and the presence of a cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., 1.5SMC300CA). Using the 1.5SMC300AHM3_A/H in reverse-biased configurations outside its specified unidirectional clamping mode may result in premature failure or undefined clamping behavior - always verify polarity alignment during layout for the 1.5SMC300AHM3_A/H.
1.5SMC300AHM3_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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- 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)
1.5SMC300AHM3_A/H FAQ
1.How can I place an order for 1.5SMC300AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC300AHM3_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 1.5SMC300AHM3_A/H reliable?
The price and inventory of 1.5SMC300AHM3_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 1.5SMC300AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC300AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC300AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC300AHM3_A/H?
1.5SMC300AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC300AHM3_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 1.5SMC300AHM3_A/H?
For technical support, including 1.5SMC300AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC300AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC300AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC300AHM3_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 1.5SMC300AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC300AHM3_A/H?
All 1.5SMC300AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC300AHM3_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 1.5SMC300AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC300AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC300AHM3_A/H Tags
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