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Vishay General Semiconductor - Diodes Division 1.5SMC91AHM3/I
- Part No.:
- 1.5SMC91AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91AHM3/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,887
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Product details
Overview
1.5SMC91AHM3/I 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 (10/1000 μs), 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), and 125 V maximum clamping voltage (VC) at 12.0 A peak pulse current. It protects automotive-grade power rails and signal lines against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC91AHM3/I datasheet, 1.5SMC91AHM3/I pinout, 1.5SMC91AHM3/I application, or 1.5SMC91AHM3/I equivalent, this part 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 robust overvoltage protection without layout redesign.
Technical Context
The 1.5SMC91AHM3/I operates as a unidirectional avalanche-clamping TVS diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and stable clamping under repetitive 10/1000 μs transients. Its 77.8 V stand-off voltage (VWM) ensures reliable blocking during normal operation while allowing fast transition into low-impedance conduction above VBR.
Thermally, it features RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling effective heat dissipation on standard 8.0 mm × 8.0 mm copper pads. With TJ max = +150 °C and IFSM = 200 A (8.3 ms half-sine), it supports high-energy surge handling in constrained automotive engine control and power supply front-end applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise avalanche onset range for predictable clamping threshold |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, ensuring no false triggering |
| VC @ IPPM | 125 V at 12.0 A - clamped voltage during full 1500 W transient, limiting downstream IC stress to safe levels |
| PPPM | 1500 W (10/1000 μs waveform) - peak surge energy absorption capacity for IEC 61000-4-5 Level 4 compliance |
| IFSM | 200 A (8.3 ms half-sine) - single-event forward surge rating, supporting high-current inrush or fault conditions |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or surge clamping | Connected to protected line (e.g., 12 V rail); must be routed with low-inductance trace for effective transient suppression |
| Cathode | Current exit point during reverse-biased clamping | Connected to ground reference plane; requires solid thermal pad connection to dissipate 1500 W pulse energy |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports use in engine control units and ADAS power domains |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and JESD201 Class 2 whisker resistance - suitable for lead-free reflow assembly and green manufacturing |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) up to Level 4 without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - critical for protecting 100 V-rated MOSFETs and gate drivers |
| MSL Level 1 (260 °C peak) | Enables standard SMT reflow without baking - reduces production overhead and avoids moisture-related popcorning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 77.8 V. Use Value: Limits clamped voltage to 125 V at 12 A, preventing damage to downstream DC/DC converters and microcontrollers rated ≤ 130 V. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector interface to suppress ESD (IEC 61000-4-2) and cable-coupled surges. Use Value: Sub-ns response ensures clamping occurs before transient reaches sensitive ADC inputs, preserving measurement integrity. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of PoE-powered line cards exposed to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Unidirectional TVS on primary-side DC bus (e.g., 48 V) to absorb common-mode transients. Use Value: 1500 W rating handles multiple 10/1000 μs events per IEC 61000-4-5, extending system uptime in outdoor telecom cabinets. |
Use Scenario: Overvoltage protection on AC-DC adapter input after bridge rectifier, prior to bulk capacitor. IC Role / Device Role / Timing Role: Clamps line-to-ground surges from mains transients (e.g., switching spikes, brownouts). Use Value: 77.8 V VWM allows stable operation across universal input (90–264 VAC), while 125 V VC prevents capacitor overvoltage 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 |
|---|---|---|---|
| SMBJ90A | Lower PPPM (600 W), same VBR range (85.5–94.5 V), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for load dump or high-reliability automotive use | Select when board space is constrained and surge energy is ≤ 600 W; verify thermal margin with smaller pad area |
| 1.5KE91A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 or halogen-free certification | Not qualified for automotive; requires wave soldering; incompatible with automated SMT lines | Choose only for legacy through-hole designs or cost-sensitive non-automotive applications where SMT is unavailable |
Compared with SMBJ90A and 1.5KE91A, the 1.5SMC91AHM3/I uniquely combines AEC-Q101 qualification, halogen-free compliance, and full 1500 W surge capability in an SMT-optimized SMC package - making it the only drop-in solution for new automotive and industrial designs requiring both reliability and manufacturability.
Availability
1.5SMC91AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom line card protection, and consumer power adapter input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.
Supply support for 1.5SMC91AHM3/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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific performance.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 validation, and consistent clamping behavior are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC91AHM3/I at its rated peak pulse current?
The 1.5SMC91AHM3/I has a maximum clamping voltage (VC) of 125 V at 12.0 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value ensures downstream components see limited overvoltage stress during surge events, and is verified per Vishay's test conditions using 8.0 mm × 8.0 mm copper pads per terminal.
Is the 1.5SMC91AHM3/I qualified for automotive applications?
Yes, the 1.5SMC91AHM3/I carries AEC-Q101 qualification, confirmed by Vishay's documentation for the HM3 suffix variant. It meets stress test requirements for temperature cycling, humidity bias, mechanical shock, and accelerated life testing - making it suitable for under-hood and chassis-mounted automotive electronics including engine control modules and body control units.
What does the "HM3" suffix indicate in 1.5SMC91AHM3/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. The "I" denotes 13-inch tape-and-reel packaging (3500 units per reel), while the base "1.5SMC91A" specifies unidirectional configuration with nominal 91 V breakdown voltage.
Can the 1.5SMC91AHM3/I be used in bidirectional protection circuits?
No - the 1.5SMC91AHM3/I is strictly unidirectional, as indicated by the "A" suffix and presence of cathode band marking. For bidirectional operation, Vishay offers the 1.5SMC91CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking on the body.
What is the maximum operating junction temperature for the 1.5SMC91AHM3/I?
The 1.5SMC91AHM3/I has a maximum operating junction temperature (TJ) of +150 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or enclosed industrial drives. Derating curves in the datasheet specify reduced peak pulse power above 25 °C ambient.
1.5SMC91AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for 1.5SMC91AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91AHM3/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 1.5SMC91AHM3/I reliable?
The price and inventory of 1.5SMC91AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC91AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91AHM3/I?
1.5SMC91AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91AHM3/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 1.5SMC91AHM3/I?
For technical support, including 1.5SMC91AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC91AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91AHM3/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 1.5SMC91AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC91AHM3/I?
All 1.5SMC91AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91AHM3/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 1.5SMC91AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC91AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91AHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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