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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHM3_A/H
- Part No.:
- 1.5SMC91CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHM3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,485
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Product details
Overview
1.5SMC91CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 125 V under 12.0 A peak pulse current, and features a 77.8 V stand-off voltage with ≤1.0 μA reverse leakage at 25 °C - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC91CAHM3_A/H datasheet, 1.5SMC91CAHM3_A/H pinout, 1.5SMC91CAHM3_A/H application, or 1.5SMC91CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and thermal resistance (RθJA = 75 °C/W) for board-level transient immunity design.
Technical Context
This device operates as a voltage-clamped crowbar during transients: when reverse voltage exceeds 77.8 V (VWM), it avalanches to limit voltage across protected circuitry. Its bidirectional symmetry enables use on AC-coupled or differential lines without polarity constraints.
Constructed with glass-passivated silicon junctions and rated for -65 °C to +150 °C operation, the 1.5SMC91CAHM3_A/H sustains repetitive 10/1000 μs surges at 0.01% duty cycle and meets J-STD-020 MSL Level 1 (260 °C reflow peak), supporting automated SMT assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown |
| VBR (Breakdown) | 86.5–95.5 V at 1.0 mA - guaranteed avalanche initiation range; ensures predictable turn-on under surge |
| VC (Clamping) | 125 V at 12.0 A IPPM - peak voltage seen by protected IC/MOSFET during worst-case 10/1000 μs transient |
| PPPM | 1500 W - energy-handling capacity for standardized lightning/surge waveforms; enables IEC 61000-4-5 compliance |
| IPPM | 12.0 A - peak surge current supported at VC; determines minimum series impedance required upstream |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs PCB copper pad sizing (8.0 mm × 8.0 mm recommended) |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads; no polarity marking (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; symmetric with cathode in bidirectional operation | Enables identical clamping behavior for positive and negative transients - no orientation sensitivity during placement |
| Cathode | Current exit point in forward bias; electrically equivalent to anode for bidirectional conduction | Eliminates need for polarity-aware routing or silkscreen marking; simplifies layout and reduces BOM variants |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports under-hood ECU, ADAS sensor, and infotainment applications |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive ICs |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles - no pre-baking required for high-volume SMT manufacturing |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives - critical for harsh-environment deployments |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains 77.8 V stand-off while clamping to 125 V - preserves signal integrity for 5 V/12 V sensor supplies and prevents latch-up in downstream op-amps or ADCs. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage suppressor on each input channel, paired with series current-limiting resistor and optocoupler isolation. Use Value: 1500 W rating handles repetitive switching surges in factory automation; AEC-Q101 qualification ensures robustness in extended-life industrial deployments. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD/Surge Protection |
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and PoE injectors from lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Common-mode TVS pair (two devices) across differential pairs or line-to-ground, coordinated with GDT or MOV primary protection. Use Value: Symmetric 125 V clamping limits voltage stress on magnetics and PHY transceivers - enabling compliance with GR-1089-CORE and ITU-T K.21. |
Use Scenario: Secondary surge suppression on AC/DC adapter secondary-side outputs (5 V/9 V/12 V rails) to meet IEC 61000-4-5 and UL 1449 requirements. IC Role / Device Role / Timing Role: Final-stage clamp after primary MOV and fuse, absorbing residual energy that bypasses upstream protection. Use Value: Low leakage (<1.0 μA) avoids standby power loss; compact SMC footprint fits space-constrained adapter PCBs without compromising creepage/clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPPM (600 W), same VWM (77.3 V), SMB package (smaller footprint, higher RθJA) | Suitable for lower-energy surges (IEC 61000-4-5 Level 2); limited thermal mass for repetitive events | Select when board space is constrained and surge threat level is moderate - verify thermal derating at 75 °C ambient |
| 1.5KE91CA | Higher VC (139 V), axial-leaded DO-201 package, non-AEC-Q101, 1500 W rating | Requires through-hole assembly; not suitable for automated SMT or automotive vibration environments | Choose only for legacy through-hole designs or cost-sensitive non-automotive applications where reflow compatibility is not required |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHM3_A/H uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W surge handling - making it the preferred choice for new automotive and industrial SMT designs requiring validated reliability and high-energy clamping.
Availability
1.5SMC91CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom infrastructure equipment, and consumer power adapters requiring stable component supply with automotive-grade traceability and lifecycle management.
Supply support for 1.5SMC91CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for robust surge handling, AEC-Q101 compliance, and seamless integration into automated SMT production lines.
FAQ
What is the clamping voltage of the 1.5SMC91CAHM3_A/H at its rated peak pulse current?
The 1.5SMC91CAHM3_A/H clamps to a maximum of 125 V at 12.0 A peak pulse current (IPPM) under 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 surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC91CAHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC91CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its construction - including glass-passivated junction, MSL Level 1 reflow rating, and -65 °C to +150 °C operating range - meets automotive environmental and reliability requirements for engine control units, body electronics, and ADAS sensor interfaces.
How does the bidirectional design of the 1.5SMC91CAHM3_A/H affect PCB layout?
The 1.5SMC91CAHM3_A/H has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. This allows simplified routing on differential lines (e.g., RS-485, CAN), AC-coupled paths, or any application where voltage polarity reversal is possible - reducing assembly errors and enabling single-BOM strategies across multiple interface types.
What is the maximum reverse leakage current for the 1.5SMC91CAHM3_A/H at its stand-off voltage?
At its 77.8 V stand-off voltage (VWM) and 25 °C ambient temperature, the 1.5SMC91CAHM3_A/H exhibits a maximum reverse leakage current of 1.0 μA. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes - verified per the Electrical Characteristics table in Vishay document 88303.
Does the 1.5SMC91CAHM3_A/H require heatsinking for standard operation?
No dedicated heatsink is required for the 1.5SMC91CAHM3_A/H under typical single-pulse or low-duty-cycle surge conditions. Its thermal design assumes mounting on 8.0 mm × 8.0 mm copper pads per terminal (per datasheet Fig. 2), yielding RθJA = 75 °C/W. For repetitive surges above 0.01% duty cycle, PCB copper area and ambient temperature must be evaluated using the derating curves in Figure 2 of document 88303.
1.5SMC91CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC91CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC91CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHM3_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 1.5SMC91CAHM3_A/H reliable?
The price and inventory of 1.5SMC91CAHM3_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 1.5SMC91CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHM3_A/H?
1.5SMC91CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHM3_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 1.5SMC91CAHM3_A/H?
For technical support, including 1.5SMC91CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC91CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHM3_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 1.5SMC91CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHM3_A/H?
All 1.5SMC91CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHM3_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 1.5SMC91CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHM3_A/H Tags
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