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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHM3_A/I
- Part No.:
- 1.5SMC91CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHM3_A/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,005
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Product details
Overview
1.5SMC91CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 91 V breakdown voltage (VBR min/max = 86.5–95.5 V at 1 mA), 77.8 V stand-off voltage (VWM), clamps to ≤125 V at 12 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC91CAHM3_A/I datasheet, 1.5SMC91CAHM3_A/I pinout, 1.5SMC91CAHM3_A/I application, or 1.5SMC91CAHM3_A/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for high-reliability bidirectional transient suppression where low clamping voltage, fast response (<1 ns), and MSL Level 1 moisture sensitivity are critical design requirements.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while the SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability rating.
The device is rated for continuous power dissipation of 6.5 W on an infinite heatsink at 50 °C, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It withstands operating junction temperatures from –65 °C to +150 °C and handles non-repetitive 8.3 ms half-sine surge currents up to 200 A in unidirectional configurations - though 1.5SMC91CAHM3_A/I is bidirectional and thus excludes IFSM rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines precise voltage threshold where avalanche conduction begins under transient stress |
| VWM | 77.8 V - maximum continuous reverse working voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | ≤125 V at IPPM = 12 A (10/1000 µs) - clamping voltage limits downstream IC stress during surge events |
| PPPM | 1500 W - peak pulse power handling capability determines survivability against lightning or inductive switch transients |
| IPPM | 12 A - maximum non-repetitive peak pulse current the device can shunt without failure |
| Junction Temp Range | –65 °C to +150 °C - enables deployment in under-hood automotive, industrial control, and outdoor telecom environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional configuration has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal functions identically as input/output; no cathode band marking - enables flexible PCB layout without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 - supports green manufacturing and reflow compatibility without moisture sensitivity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) and ISO 7637-2 Pulse 1/2a/3a - protects CAN, LIN, and 12 V/24 V supply lines |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during clamping - preserves margin for 100 V-rated MOSFETs and 3.3 V/5 V logic interfaces |
| Fast response time (<1 ns) | Activates before sensitive circuitry sustains damage from ESD or fast-rising transients - critical for USB, Ethernet, and sensor analog front-ends |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±100 V surges before reaching ADC driver or op-amp input stage. Use Value: Prevents latch-up or permanent damage to 16-bit SAR ADCs and rail-to-rail amplifiers operating near 5 V supply rails. |
Use Scenario: Shielding digital input modules in programmable logic controllers from induced surges on 24 V DC field wiring. IC Role / Device Role / Timing Role: Primary surge suppression element upstream of optocoupler input and Schmitt-trigger conditioning circuitry. Use Value: Maintains functional safety integrity by limiting transient energy to <10 mJ at the isolation barrier, meeting IEC 61000-4-4 Level 3. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs connected to outside plant cabling subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (with matching 1.5SMC91CAHM3_A/I units) across differential pairs and shield ground. Use Value: Enables compliance with ITU-T K.21 Basic Protection Level and reduces need for secondary GDT-based protection stages. |
Use Scenario: Secondary-side transient suppression on 5 V/9 V/12 V USB-C PD adapter outputs to protect connected mobile devices. IC Role / Device Role / Timing Role: Final-stage clamping device after primary DC-DC regulation, placed adjacent to output connector. Use Value: Limits output overvoltage to <130 V during fault conditions, satisfying UL 62368-1 Annex D10 requirements for user-accessible ports. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPPM (600 W), same VWM (77.5 V), larger VC (129 V @ 4.7 A), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for 24 V industrial bus protection requiring >1 kA surge handling | Select when board space is constrained and surge threat level is moderate (e.g., internal USB data lines). |
| 1.5KE91CA | Through-hole DO-201 package, identical VBR/VWM/VC, but slower thermal response and incompatible with SMT assembly | Used in legacy designs or high-vibration environments where mechanical retention outweighs automation benefits | Choose only for repair/replacement of existing through-hole boards; not recommended for new SMT designs. |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHM3_A/I delivers 2.5× higher peak pulse power in an AEC-Q101-qualified, halogen-free SMC package - making it the preferred choice for new automotive and industrial designs demanding robust, automated, and environmentally compliant surge protection.
Availability
1.5SMC91CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter outputs requiring stable component supply, long-term lifecycle support, and AEC-Q101 qualification.
Supply support for 1.5SMC91CAHM3_A/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, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC91CAHM3_A/I?
The 1.5SMC91CAHM3_A/I has a specified breakdown voltage range of 86.5 V to 95.5 V at a test current of 1 mA, corresponding to a ±5% tolerance around the nominal 91 V rating. This tight VBR distribution ensures consistent clamping behavior across production lots and supports reliable system-level surge margin calculations in designs using the 1.5SMC91CAHM3_A/I.
Is 1.5SMC91CAHM3_A/I suitable for automotive applications?
Yes, the 1.5SMC91CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly designated for automotive use via the "HM3" and "_A" suffixes. It meets requirements for under-hood and cabin applications including engine control units, body electronics, and ADAS sensor interfaces where sustained operation at 150 °C junction temperature and resistance to repetitive transients are essential.
Does 1.5SMC91CAHM3_A/I have polarity markings?
No, the 1.5SMC91CAHM3_A/I is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical construction allows either terminal to serve as input or return path - simplifying PCB layout and eliminating orientation errors during automated assembly. This distinguishes it from unidirectional variants like 1.5SMC91AHM3_A/I, which do feature a cathode band.
What is the maximum clamping voltage of 1.5SMC91CAHM3_A/I under surge conditions?
The 1.5SMC91CAHM3_A/I clamps to a maximum of 125 V when subjected to its rated 12 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - a key parameter used to verify safe operating margins for downstream components in systems using the 1.5SMC91CAHM3_A/I.
How does the SMC package of 1.5SMC91CAHM3_A/I compare thermally to SMA or SMB packages?
The SMC (DO-214AB) package used by the 1.5SMC91CAHM3_A/I offers significantly better thermal performance than SMA (DO-214AC) or SMB (DO-214AA), with a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W - versus ~100–120 °C/W for SMB/SMA. This enables higher sustained power dissipation and improved reliability in high-temperature environments, directly supporting the 1.5SMC91CAHM3_A/I's 1500 W pulse rating and 150 °C max junction temperature.
1.5SMC91CAHM3_A/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:
- 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/I FAQ
1.How can I place an order for 1.5SMC91CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHM3_A/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 1.5SMC91CAHM3_A/I reliable?
The price and inventory of 1.5SMC91CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHM3_A/I?
1.5SMC91CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHM3_A/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 1.5SMC91CAHM3_A/I?
For technical support, including 1.5SMC91CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC91CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHM3_A/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 1.5SMC91CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHM3_A/I?
All 1.5SMC91CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHM3_A/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 1.5SMC91CAHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHM3_A/I Tags
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