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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHM3/I
- Part No.:
- 1.5SMC91CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHM3/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,025
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Product details
Overview
1.5SMC91CAHM3/I from Vishay General Semiconductor is a bidirectional 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 1 mA), 1500 W peak pulse power (10/1000 μs), clamping voltage of 125 V at 12 A, and operates across –65 °C to +150 °C. It is used to protect automotive sensor interfaces, industrial I/O ports, and telecom line receivers against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC91CAHM3/I datasheet, 1.5SMC91CAHM3/I pinout, 1.5SMC91CAHM3/I application, or 1.5SMC91CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, SMC (DO-214AB) package thermal performance, and compliance with UL 497B surge protector requirements.
Technical Context
This device is a glass-passivated, surface-mount TVS diode optimized for fast response (<1 ps) and low clamping ratio (VC/VBR ≈ 1.30). Its bidirectional architecture enables symmetrical suppression of positive and negative transients without polarity sensitivity-critical for AC-coupled or differential signal paths.
It delivers 12 A peak pulse current (IPPM) under 10/1000 μs waveform while maintaining <1 μA reverse leakage at 77.8 V (VWM). Thermal resistance is rated at RθJA = 75 °C/W on standard 8 mm × 8 mm copper pads, supporting reliable operation in high-temperature automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines precise voltage threshold where avalanche conduction begins in both directions |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC bias margin |
| VC @ IPPM | 125 V at 12 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak surge power handling capacity; supports EN 61000-4-5 Level 4 (4 kV) compliance with proper layout |
| IPPM | 12 A - peak pulse current capability; correlates directly with surge energy absorption (E ≈ 1.5 J for 10/1000 μs) |
| TJmax | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial settings |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No marking on device; symmetric terminals enable orientation-agnostic PCB layout for AC or differential protection |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | No marking on device; identical physical terminal as Anode - bidirectional operation eliminates polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements |
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 4 kV surge (with appropriate PCB trace inductance and grounding) |
| Low clamping ratio (VC/VBR ≈ 1.30) | Minimizes voltage overshoot during clamping-critical for safeguarding 100 V-rated MOSFETs and microcontrollers |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal and humidity stress |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide damage in 5 V/12 V sensor signal chains by clamping surges to ≤125 V within <1 ns-enabling AEC-Q100 Grade 2 compliance. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-connected TVS across input terminals to shunt induced lightning energy (IEC 61000-4-5) before reaching precision op-amps and ADCs. Use Value: Maintains signal integrity by limiting transient overvoltage to 125 V while adding <0.5 pF capacitance-no bandwidth degradation in sub-MHz measurement circuits. |
| Telecom Line Receiver Protection | AC Power Supply Inrush & Surge Clamping |
|
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and RS-485 transceivers from induced surges on outdoor cabling in base stations and network edge devices. IC Role / Device Role / Timing Role: Bidirectional TVS placed between differential pairs (e.g., TX+/TX−) to suppress common-mode and differential-mode transients simultaneously. Use Value: Enables compliance with GR-1089-CORE Zone 3 (10/700 μs, 6 kV) when paired with series impedance-clamps to 125 V before receiver input stages saturate. |
Use Scenario: Suppressing switch-mode power supply turn-on surges and AC line transients (e.g., from motor loads) on 100–240 VAC inputs feeding rectifier bridges. IC Role / Device Role / Timing Role: Across-line (L–N) or line-to-ground (L–G/N–G) TVS to clamp high-energy ringwave events before bulk capacitors and bridge rectifiers. Use Value: Absorbs up to 1.5 J per event (10/1000 μs) without degradation-replaces bulkier MOVs in space-constrained SMPS designs requiring >100 k-cycle lifetime. |
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 VBR range (85.5–94.5 V), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-4 EFT); unsuitable for 4 kV lightning tests without derating | Select when board space is constrained and surge threat level is ≤2 kV; verify thermal margin at 125 °C ambient |
| 1.5KE91CA | Through-hole DO-201 package, identical electrical specs but higher mounting inductance and no AEC-Q101 qualification | Not suitable for automated SMT production or automotive vibration environments; requires wave soldering | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHM3/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package manufacturability-making it the preferred choice for production automotive and industrial SMT assemblies requiring validated reliability and high-energy clamping.
Availability
1.5SMC91CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC analog input protection, and telecom line receiver hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC91CAHM3/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 optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where AEC-Q101 validation, low clamping ratio, and repeatable surge endurance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC91CAHM3/I?
The 1.5SMC91CAHM3/I has a specified breakdown voltage range of 86.5 V to 95.5 V at 1 mA test current, representing a ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level surge margin calculations in designs using the 1.5SMC91CAHM3/I.
Is 1.5SMC91CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC91CAHM3/I is AEC-Q101 qualified (indicated by the "HM3" suffix), meaning it has passed stress tests for temperature cycling, high-temperature reverse bias, and mechanical shock required for automotive under-hood and cabin electronics. Its –65 °C to +150 °C operating range and halogen-free construction further validate its suitability for automotive use cases involving the 1.5SMC91CAHM3/I.
What does the "CA" suffix mean in 1.5SMC91CAHM3/I?
The "CA" suffix in 1.5SMC91CAHM3/I 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/I has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or differential signal protection where polarity cannot be assumed.
What is the maximum clamping voltage of 1.5SMC91CAHM3/I under surge conditions?
The 1.5SMC91CAHM3/I clamps to a maximum of 125 V when subjected to its rated 12 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This VC value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during surge events-critical for ensuring downstream components like 100 V MOSFETs remain within safe operating area when using the 1.5SMC91CAHM3/I.
How does the SMC package of 1.5SMC91CAHM3/I compare to SMB or SMA packages?
The SMC (DO-214AB) package of the 1.5SMC91CAHM3/I offers larger copper pad area and lower thermal resistance (RθJA = 75 °C/W) than SMB (RθJA ≈ 85 °C/W) or SMA (RθJA ≈ 95 °C/W), enabling higher sustained power dissipation and improved surge survivability. Its 7.75 mm × 6.22 mm footprint also provides superior mechanical robustness in vibration-prone environments-key for automotive and industrial deployments of the 1.5SMC91CAHM3/I.
1.5SMC91CAHM3/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:
- -
- 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/I FAQ
1.How can I place an order for 1.5SMC91CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHM3/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/I reliable?
The price and inventory of 1.5SMC91CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHM3/I?
1.5SMC91CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHM3/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/I?
For technical support, including 1.5SMC91CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC91CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHM3/I?
All 1.5SMC91CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHM3/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/I part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHM3/I Tags
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