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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHM3/H
- Part No.:
- 1.5SMC91CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHM3/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
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Product details
Overview
1.5SMC91CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 91 V breakdown voltage (VBR min/max: 86.5 V / 95.5 V), and clamping voltage of 125 V at 12.0 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces and industrial control I/O.
For engineers reviewing the 1.5SMC91CAHM3/H datasheet, 1.5SMC91CAHM3/H pinout, 1.5SMC91CAHM3/H application, or 1.5SMC91CAHM3/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding to transients within picoseconds. Its bidirectional symmetry enables suppression of both positive and negative polarity surges without polarity sensitivity, making it suitable for AC-coupled or differential signal paths.
Rated for 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity, the 1.5SMC91CAHM3/H features glass-passivated chip construction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
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 voltage threshold where avalanche conduction begins in both directions |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; sets safe DC bias limit |
| VC @ IPPM | 125 V at 12.0 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling capability under standardized waveform; validates robustness against lightning-induced surges |
| IPPM | 12.0 A - maximum non-repetitive peak pulse current supported; used to size upstream fusing and trace routing |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal derating |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in CA devices |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions above VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress requirements |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609 Category 1a for bromine/chlorine content; supports green manufacturing and end-of-life compliance |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive ICs |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C / 60 % RH; compatible with standard reflow profiles up to 260 °C peak |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and jump-start induced transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Maintains signal integrity below 125 V clamping level while surviving repetitive 1500 W pulses per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS suppressing transients before they reach optocoupler input stages or microcontroller GPIOs. Use Value: Enables >100,000 surge cycles at rated conditions due to low thermal resistance (RθJL = 15 °C/W) and stable VBR drift. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY front-end circuits from lightning-induced surges on PoE-enabled RJ45 ports. IC Role / Device Role / Timing Role: Common-mode TVS deployed across transformer secondary windings to clamp differential and common-mode overvoltages. Use Value: Symmetrical bidirectional response ensures equal protection for both line polarities without requiring orientation-aware placement. |
Use Scenario: Secondary-side surge suppression on 12 V DC output rails of wall-mounted AC/DC adapters used in smart home hubs. IC Role / Device Role / Timing Role: Final-stage protector downstream of primary-side MOVs and Y-capacitors, absorbing residual ringwave energy. Use Value: Halogen-free construction meets IEC 62368-1 flame-retardancy requirements while delivering 125 V clamping at full 12 A rating. |
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 peak pulse power (600 W), same VBR range (85.5–94.5 V), SMB package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump scenarios | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE91CA | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly and higher RθJA (100 °C/W) | Requires manual or wave soldering; not viable for high-volume automated production or compact PCBs | Choose only for legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHM3/H delivers superior surge robustness in an SMT-compatible, automotive-qualified package-enabling single-device compliance with ISO 16750-2 and IEC 61000-4-5 without layout compromise.
Availability
1.5SMC91CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC91CAHM3/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, precision, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS protection for harsh-environment applications-particularly automotive, industrial, and telecom systems demanding AEC-Q101 qualification and repeatable clamping performance.
FAQ
What does the "CA" suffix indicate in 1.5SMC91CAHM3/H?
The "CA" suffix in 1.5SMC91CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., "A"), the 1.5SMC91CAHM3/H has no polarity marking and functions identically regardless of terminal orientation-critical for AC signal lines and differential buses like CAN or RS-485.
Is 1.5SMC91CAHM3/H qualified for automotive use?
Yes, 1.5SMC91CAHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC series datasheet (Doc. #88303). It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev G, making it suitable for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of 1.5SMC91CAHM3/H at its rated peak pulse current?
The clamping voltage (VC) of 1.5SMC91CAHM3/H is 125 V at 12.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured across the device terminals during surge conduction and defines the maximum voltage imposed on protected circuitry during worst-case transient events.
How does the HM3 suffix differ from E3 or M3 in the 1.5SMC91CAHM3/H part number?
The "HM3" suffix in 1.5SMC91CAHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. In contrast, "E3" denotes RoHS-compliant commercial grade only, and "M3" adds halogen-free compliance but excludes automotive qualification. The "H" denotes 7-inch tape-and-reel packaging (850 units per reel).
Can 1.5SMC91CAHM3/H be used in place of a unidirectional TVS like 1.5SMC91AHM3/H?
No-1.5SMC91CAHM3/H is strictly bidirectional and cannot replace unidirectional devices such as 1.5SMC91AHM3/H in DC-biased applications where forward conduction must be blocked. Substitution requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating rails; unidirectional types are required for DC power lines with defined polarity.
1.5SMC91CAHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for 1.5SMC91CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHM3/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/H reliable?
The price and inventory of 1.5SMC91CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHM3/H?
1.5SMC91CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHM3/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/H?
For technical support, including 1.5SMC91CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC91CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHM3/H?
All 1.5SMC91CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHM3/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/H part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHM3/H Tags
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