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Vishay General Semiconductor - Diodes Division 1.5SMC300AHM3_B/I
- Part No.:
- 1.5SMC300AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC300AHM3_B/I.pdf
- Description:
- TVS DIODE 256VWM 414VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,271
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Product details
Overview
1.5SMC300AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 300 V standoff voltage (VWM), 344 V minimum breakdown voltage (VBR), 414 V maximum clamping voltage (VC) at 3.6 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive power distribution modules, industrial motor drives, and telecom DC power inputs.
For engineers reviewing the 1.5SMC300AHM3_B/I datasheet, 1.5SMC300AHM3_B/I pinout, 1.5SMC300AHM3_B/I application, or 1.5SMC300AHM3_B/I equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, SMC (DO-214AB) package compatibility, and verified clamping performance under repetitive lightning-surge stress per IEC 61000-4-5.
Technical Context
The 1.5SMC300AHM3_B/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 344 V minimum breakdown threshold (VBR at 1 mA), then clamping transients to ≤414 V at 3.6 A (IPPM). Its glass-passivated junction ensures stable leakage (<1 μA at 256 V) and fast response time (<1.0 ns).
Thermally, it sustains 150 °C maximum junction temperature with 75 °C/W junction-to-ambient thermal resistance (RθJA) on standard 8.0 mm × 8.0 mm copper pads. The device is rated for 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 256 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC line rating. |
| VBR (Breakdown) | 344 V min at 1 mA - Avalanche onset voltage; ensures reliable triggering above system nominal voltage. |
| VC (Clamping) | 414 V max at 3.6 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM | 1500 W - Surge energy handling capacity per IEC 61000-4-5; supports Class 4 lightning immunity designs. |
| ID (Leakage) | <1 μA at 256 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing without degradation. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and low parametric drift over 1000-hour HTOL life test. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive power electronics including engine control units and battery management systems. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning. |
Applications
| Automotive Power Distribution | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protection of 24 V/48 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps 120 V/350 ms load dump spikes to ≤414 V, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Surge suppression on DC bus of variable-frequency drives powering HVAC compressors. IC Role / Device Role / Timing Role: Parallel-connected TVS across main DC link capacitors to absorb regenerative switching spikes. Use Value: Absorbs 1500 W transient energy from IGBT turn-off, limiting bus overvoltage to safe margin below IGBT VCES rating. |
| Telecom DC Power Input | Renewable Energy Charge Controller |
Use Scenario: Front-end protection of PoE-powered base stations and remote radio units. IC Role / Device Role / Timing Role: Primary-level TVS on -48 V DC input prior to DC-DC isolation stage. Use Value: Withstands repeated 10/1000 μs surges up to 4 kV (IEC 61000-4-5), maintaining <1 μA leakage at nominal -48 V. |
Use Scenario: Overvoltage clamp in solar charge controllers exposed to lightning-induced surges on PV string inputs. IC Role / Device Role / Timing Role: Unidirectional TVS between PV+ and chassis ground, triggered only during positive transients. Use Value: Limits clamping voltage to 414 V while sustaining 3.6 A peak pulse, protecting MPPT controller MOSFETs rated at 500 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ300A-E3/57T | Same VWM (256 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive load dump. | Select when board space is constrained and surge energy does not exceed 400 W. |
| 1.5KE300A | Through-hole TO-204AA (DO-41), identical VWM/VBR/VC specs, but no AEC-Q101 or halogen-free certification. | Not qualified for automotive use; requires wave soldering or hand assembly; higher thermal resistance. | Choose for cost-sensitive industrial prototypes where AEC-Q101 and RoHS are not mandated. |
Compared with SMAJ300A-E3/57T and 1.5KE300A, the 1.5SMC300AHM3_B/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, halogen-free compliance, and SMC surface-mount scalability - making it the only option validated for production automotive power modules requiring zero rework risk and full traceability.
Availability
1.5SMC300AHM3_B/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive DC bus protection, and telecom DC power input applications requiring stable component supply, long-term lifecycle support, and full AEC-Q101 documentation traceability.
Supply support for 1.5SMC300AHM3_B/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, power efficiency, and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of the 1.5SMC300AHM3_B/I at its rated peak pulse current?
The 1.5SMC300AHM3_B/I has a maximum clamping voltage (VC) of 414 V at its rated peak pulse current (IPPM) of 3.6 A, measured using a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuitry during surge events. Engineers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is the 1.5SMC300AHM3_B/I qualified for automotive applications?
Yes, the 1.5SMC300AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. This qualification makes the 1.5SMC300AHM3_B/I suitable for under-hood and body-control module applications where reliability under thermal and electrical stress is critical.
What does the "B" and "I" in 1.5SMC300AHM3_B/I signify?
In 1.5SMC300AHM3_B/I, "B" denotes the revision level for AEC-Q101 qualification applicable to 250 V to 540 V variants, and "I" specifies the packaging format: 13-inch diameter plastic tape and reel containing 3500 units. The "HM3" portion confirms halogen-free, RoHS-compliant construction with matte tin plating. These codes are defined in Vishay's Ordering Information table (page 3, Document 88303).
Can the 1.5SMC300AHM3_B/I be used in bidirectional configurations?
No, the 1.5SMC300AHM3_B/I is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Its cathode band marks the polarity-sensitive terminal, and it conducts only during reverse-biased overvoltage events. For bidirectional protection, Vishay offers variants like 1.5SMC300CA; using the 1.5SMC300AHM3_B/I in AC or symmetrical surge scenarios would require external circuitry and is not recommended per datasheet guidance.
What is the thermal resistance of the 1.5SMC300AHM3_B/I under standard mounting conditions?
The 1.5SMC300AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table (page 3, Document 88303). This value assumes FR-4 PCB with 1 oz copper and no additional heatsinking - critical for calculating steady-state junction temperature rise under continuous power dissipation (PD = 6.5 W).
1.5SMC300AHM3_B/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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC300AHM3_B/I FAQ
1.How can I place an order for 1.5SMC300AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC300AHM3_B/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 1.5SMC300AHM3_B/I reliable?
The price and inventory of 1.5SMC300AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC300AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC300AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC300AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC300AHM3_B/I?
1.5SMC300AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC300AHM3_B/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 1.5SMC300AHM3_B/I?
For technical support, including 1.5SMC300AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC300AHM3_B/I requirements.
6.How does Aetrix verify that 1.5SMC300AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC300AHM3_B/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 1.5SMC300AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC300AHM3_B/I?
All 1.5SMC300AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC300AHM3_B/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 1.5SMC300AHM3_B/I part is unused and in its original packaging.
Return procedure for 1.5SMC300AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC300AHM3_B/I Tags
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