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Vishay General Semiconductor - Diodes Division 1.5SMC91AHM3_A/H
- Part No.:
- 1.5SMC91AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91AHM3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
1.5SMC91AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 77.8 V stand-off voltage (VWM), 125 V maximum clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial motor drives, and telecom line protection.
For engineers reviewing the 1.5SMC91AHM3_A/H datasheet, 1.5SMC91AHM3_A/H pinout, 1.5SMC91AHM3_A/H application, or 1.5SMC91AHM3_A/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring validated transient immunity without layout redesign.
Technical Context
The 1.5SMC91AHM3_A/H operates as a unidirectional avalanche-clamping TVS diode, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time and stable clamping under repetitive 10/1000 µs transients. Its thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ = –65 to +150 °C) support operation on standard SMC pad layouts without forced cooling.
Designed for surface-mount implementation in DO-214AB (SMC) package, it uses cathode-band polarity marking and mates with J-STD-002/JESD 22-B102 soldering standards. The device meets UL 497B recognition (QVGQ2) and supports bidirectional variants via CA suffix - though 1.5SMC91AHM3_A/H itself is strictly unidirectional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable avalanche initiation threshold across production lot and temperature range |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring no false triggering in nominal 72 V systems |
| VC @ IPPM | 125 V at 12.0 A - clamping voltage during full-rated 1500 W transient, limiting downstream IC stress to safe margin below 130 V rails |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IFSM | 200 A - 8.3 ms single half-sine surge current rating, supporting inrush and fault-current suppression in DC power inputs |
| TJ max. | +150 °C - maximum junction temperature allowing sustained operation in engine bay or enclosed industrial enclosures |
| Package | SMC (DO-214AB) - standardized 7.11 mm × 6.22 mm footprint with 2.62 mm height, compatible with automated pick-and-place and reflow profiles up to 260 °C peak |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking on body; anode is unmarked end. 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 node | Connected to protected line; conducts avalanche current to ground during overvoltage events - must route with low-inductance path to chassis or power return |
| Anode (unmarked end) | Reference/return node | Typically tied to system ground or low-impedance return plane; establishes clamping reference and completes surge current loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for under-hood and ADAS sensor protection |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609A Class 1 definition and EU RoHS Directive 2011/65/EU - enables compliance in global automotive and industrial supply chains |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave (4 kV open-circuit, 2 Ω source impedance) without degradation after ≥1000 pulses |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes let-through energy to downstream MOSFETs or microcontrollers - critical for protecting 100 V-rated gate drivers and CAN transceivers |
| MSL Level 1 (260 °C peak) | Eliminates bake-out requirement prior to reflow; supports standard lead-free assembly without moisture-induced popcorn failure |
Applications
| Automotive Power Line Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp spikes up to 120 V within <1 ns. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (12 V systems) and Pulse 5b (24 V systems) without derating or parallel devices. |
Use Scenario: Safeguarding gate driver inputs and feedback signal lines in variable-frequency drives exposed to IGBT switching noise and inductive kickback. IC Role / Device Role / Timing Role: Clamping transient voltages on isolated analog feedback paths and PWM enable lines to prevent false triggering of protection circuits. Use Value: Maintains signal integrity under 100 V/µs dV/dt events while adding <1 pF junction capacitance - no bandwidth degradation in 100 kHz control loops. |
| Telecom DC Power Input | Consumer Appliance Mainboard |
|
Use Scenario: Securing 48 V PoE-powered equipment (e.g., IP cameras, wireless access points) against lightning-induced surges on Ethernet ports and DC input rails. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with secondary MOVs and gas discharge tubes for staged surge suppression. Use Value: Delivers 1500 W pulse rating with 125 V clamping - holds downstream DC/DC converters within absolute maximum ratings during 10/700 µs telecom surges. |
Use Scenario: Shielding microcontroller I/O, display backlight drivers, and relay coil suppression circuits in washing machines, HVAC controllers, and smart appliances. IC Role / Device Role / Timing Role: Low-profile SMC-packaged TVS mounted directly at connector entry points and inductive load terminals to localize energy dissipation. Use Value: Halogen-free construction satisfies IEC 61249-2-21 requirements; 75 °C/W RθJA allows thermal management without heatsinks on FR-4 boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-E3/52 | Lower peak pulse power (600 W), smaller SMB package (DO-214AA), VC = 129 V @ 4.7 A | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for load dump or high-current industrial surges | Select when board space is constrained and surge threat level is ≤600 W - not a drop-in replacement for 1.5SMC91AHM3_A/H's 1500 W capability |
| 1.5KE91A | Through-hole TO-204AE (DO-201AD) package, same VBR/VC, but higher RθJA (100 °C/W) and no AEC-Q101 qualification | Requires manual insertion or wave soldering; lacks automotive qualification and halogen-free compliance | Choose only for legacy through-hole designs where rework to SMD is impractical - otherwise, 1.5SMC91AHM3_A/H offers superior manufacturability and qualification |
Compared with SMBJ90A-E3/52 and 1.5KE91A, the 1.5SMC91AHM3_A/H uniquely combines 1500 W surge rating, AEC-Q101 qualification, halogen-free RoHS compliance, and SMC surface-mount compatibility - making it the sole option among the three qualified for new automotive and high-reliability industrial designs requiring zero-layout-change integration.
Availability
1.5SMC91AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom infrastructure requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1.5SMC91AHM3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 validation, and consistent clamping behavior are non-negotiable.
FAQ
What is the clamping voltage of the 1.5SMC91AHM3_A/H under full-rated surge conditions?
The 1.5SMC91AHM3_A/H exhibits a maximum clamping voltage (VC) of 125 V at 12.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Fig. 1 in Vishay document 88303 and ensures downstream components remain within safe operating limits during standardized surge events such as IEC 61000-4-5.
Is the 1.5SMC91AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC91AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It is explicitly rated for under-hood and ADAS sensor protection per Vishay's ordering table footnote (1), making it appropriate for ISO 16750-2 and ISO 7637-2 compliant designs.
What does the "_A/H" suffix mean in 1.5SMC91AHM3_A/H?
The "_A/H" suffix in 1.5SMC91AHM3_A/H denotes two attributes: "A" indicates AEC-Q101 qualification for the 6.8 V to 220 V voltage range, and "H" specifies packaging in 7-inch diameter plastic tape and reel (850 units per reel), per Vishay's Ordering Information table on page 3 of document 88303.
How does the 1.5SMC91AHM3_A/H compare to bidirectional TVS diodes like 1.5SMC91CHM3_A/H?
The 1.5SMC91AHM3_A/H is unidirectional and features a cathode band; 1.5SMC91CHM3_A/H is its bidirectional counterpart with identical VBR and VC ratings but symmetrical clamping in both polarities. Use 1.5SMC91AHM3_A/H for DC power line protection where polarity is fixed; choose the "C" version only for AC-coupled or floating signal lines requiring dual-polarity suppression.
What is the thermal resistance and maximum junction temperature of the 1.5SMC91AHM3_A/H?
The 1.5SMC91AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" copper pads, and a maximum junction temperature (TJ) of +150 °C. These values are specified in the Thermal Characteristics table (page 3) and support operation in high-temperature environments without active cooling.
1.5SMC91AHM3_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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
1.5SMC91AHM3_A/H FAQ
1.How can I place an order for 1.5SMC91AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91AHM3_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 1.5SMC91AHM3_A/H reliable?
The price and inventory of 1.5SMC91AHM3_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 1.5SMC91AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91AHM3_A/H?
1.5SMC91AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91AHM3_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 1.5SMC91AHM3_A/H?
For technical support, including 1.5SMC91AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC91AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91AHM3_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 1.5SMC91AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91AHM3_A/H?
All 1.5SMC91AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91AHM3_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 1.5SMC91AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC91AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91AHM3_A/H Tags
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