My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC300AHM3_B/H
- Part No.:
- 1.5SMC300AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC300AHM3_B/H.pdf
- Description:
- TVS DIODE 256VWM 414VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC300AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 300 V standoff voltage (VWM), 344 V clamping voltage (VC) at 3.6 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform. It is AEC-Q101 qualified and housed in an SMC (DO-214AB) package for automotive-grade reliability in engine control units and battery management systems.
For engineers reviewing the 1.5SMC300AHM3_B/H datasheet, 1.5SMC300AHM3_B/H pinout, 1.5SMC300AHM3_B/H application, or 1.5SMC300AHM3_B/H equivalent, this device is selected for robust overvoltage protection where precise clamping, low leakage (<1.0 μA at VWM), and thermal stability up to +150 °C junction temperature are critical in harsh-environment electronics.
Technical Context
The 1.5SMC300AHM3_B/H operates as a unidirectional avalanche-clamping TVS diode, triggered when reverse voltage exceeds its 300 V standoff threshold. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive transients.
Designed for 10/1000 μs surge waveforms at 0.01% duty cycle, it delivers 3.6 A peak pulse current while maintaining a maximum clamping voltage of 344 V - enabling effective protection of downstream MOSFETs, DC-DC controllers, and CAN/LIN bus interfaces without overstressing protected circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24/48 V industrial or 12 V automotive supply rails. |
| VBR (Breakdown Voltage) | 315 V min / 344 V max at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on within ±10% tolerance under production conditions. |
| VC (Clamping Voltage) | 344 V at IPPM = 3.6 A - Peak voltage seen by protected circuit during full-rated transient; enables IEC 61000-4-5 Level 4 compliance with margin. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capability per 10/1000 μs surge; supports repeated lightning-induced surges in outdoor equipment. |
| ID (Reverse Leakage) | <1.0 μA at 300 V - Negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial motor drives without derating. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint; compatible with automated reflow assembly. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit return path | Connected to ground or low-side reference; conducts during reverse overvoltage events to clamp voltage across load. |
| Anode | Input line connection | Connected to power rail or signal line requiring protection; blocks forward current and conducts only during reverse transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics; supports PPAP documentation and long-term reliability requirements. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (e.g., 2 Ω/12 Ω source impedance) without degradation across 1000+ cycles. |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime; eliminates parameter drift due to moisture ingress or metallization migration. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., <1 ns rise time), improving protection fidelity for sensitive microcontrollers. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration standards and JESD201 Class 2 whisker resistance; suitable for green manufacturing programs. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC Power Input Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied MCU power rails from load-dump transients up to 35 V and alternator ripple spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input to clamp surges before regulation stage. Use Value: Clamps 300 V transients to ≤344 V within nanoseconds, preventing latch-up or gate oxide damage in buck controller ICs. |
Use Scenario: Safeguarding 48 V telecom rectifier outputs against induced lightning surges on outdoor cabinet feed lines. IC Role / Device Role / Timing Role: Primary-level TVS on main DC bus, coordinated with MOVs and gas discharge tubes in multi-stage protection architecture. Use Value: Absorbs 1500 W pulses without thermal runaway, maintaining system uptime during Category B/C surge events per IEC 61643-31. |
| Onboard Charger (OBC) High-Voltage Interface | Motor Drive Gate Driver Supply Rail |
Use Scenario: Shielding isolated CAN communication lines and auxiliary 12 V logic supplies in EV onboard chargers exposed to high dv/dt noise. IC Role / Device Role / Timing Role: Secondary TVS on isolated 12 V bias rail feeding isolated gate drivers and communication ICs. Use Value: Sub-1 μA leakage preserves low-power sleep mode integrity; 344 V clamping prevents false resets during AC/DC converter switching noise. |
Use Scenario: Protecting isolated 15 V gate driver supplies in 3-phase inverters from cross-talk and shoot-through induced transients. IC Role / Device Role / Timing Role: Local TVS at each half-bridge gate driver IC input to suppress Miller-induced voltage spikes. Use Value: Fast response time limits voltage overshoot to <50 ns, avoiding unintended IGBT/MOSFET turn-on and short-circuit failure. |
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 300 V VWM and 344 V VC, but lower PPPM (400 W); SOD-123FL package (smaller footprint, higher thermal resistance). | Limited to low-energy surges (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ or load-dump scenarios. | Select only for space-constrained consumer PCBs where surge energy is strictly limited to <100 mJ. |
| 1.5KE300A | Through-hole DO-201 package; identical electrical specs but higher RθJA (100 °C/W vs. 75 °C/W) and no AEC-Q101 qualification. | Not approved for automotive use; requires manual soldering and larger board area; less reliable in vibration-prone environments. | Acceptable for industrial benchtop equipment where automated assembly and automotive qualification are not required. |
Compared with SMAJ300A-E3/57T and 1.5KE300A, the 1.5SMC300AHM3_B/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC surface-mount compatibility - making it the only choice for production automotive modules requiring validated reliability and high-energy clamping in automated manufacturing.
Availability
1.5SMC300AHM3_B/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC power inputs, onboard charger interfaces, and motor drive gate driver supply rails requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1.5SMC300AHM3_B/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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS solutions for automotive and industrial systems demanding AEC-Q101 validation, low clamping voltage, and robust surge handling in compact packages.
FAQ
What is the maximum clamping voltage of the 1.5SMC300AHM3_B/H under full-rated surge conditions?
The 1.5SMC300AHM3_B/H has a maximum clamping voltage (VC) of 344 V at 3.6 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per JEDEC standard test conditions and represents the highest voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC300AHM3_B/H suitable for automotive applications?
Yes, the 1.5SMC300AHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from −65 °C to +150 °C junction temperature and validated for mechanical shock, vibration, and humidity resistance per automotive reliability standards - making it appropriate for ECUs, ADAS modules, and battery management systems.
What does the "B/H" suffix mean in 1.5SMC300AHM3_B/H?
In 1.5SMC300AHM3_B/H, "B" denotes the revision level for AEC-Q101 qualification applicable to 250 V to 540 V variants, and "H" specifies the packaging format: 7-inch diameter plastic tape and reel with 850 units per reel. The "HM3" base suffix confirms halogen-free, RoHS-compliant materials and JESD201 Class 2 whisker resistance.
How does the 1.5SMC300AHM3_B/H compare to bidirectional TVS diodes like 1.5SMC300CA?
The 1.5SMC300AHM3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., positive supply rails). In contrast, 1.5SMC300CA is bidirectional and suited for AC lines or data buses like RS-485. Using the unidirectional 1.5SMC300AHM3_B/H on AC signals would cause forward conduction and failure; selection must match circuit topology and voltage polarity requirements.
What thermal design considerations apply to the 1.5SMC300AHM3_B/H in PCB layout?
The 1.5SMC300AHM3_B/H requires minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve specified 1500 W pulse rating and thermal resistance (RθJA = 75 °C/W). Smaller pads increase junction temperature during surge events, reducing safe operating life and potentially causing parametric shift. Thermal vias under pads and internal ground planes are recommended for sustained high-duty-cycle applications.
1.5SMC300AHM3_B/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):
- 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/H FAQ
1.How can I place an order for 1.5SMC300AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC300AHM3_B/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_B/H reliable?
The price and inventory of 1.5SMC300AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC300AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC300AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC300AHM3_B/H?
1.5SMC300AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC300AHM3_B/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_B/H?
For technical support, including 1.5SMC300AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC300AHM3_B/H requirements.
6.How does Aetrix verify that 1.5SMC300AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC300AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC300AHM3_B/H?
All 1.5SMC300AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC300AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for 1.5SMC300AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC300AHM3_B/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
