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Vishay General Semiconductor - Diodes Division 1.5SMC91CA-M3/57T
- Part No.:
- 1.5SMC91CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CA-M3/57T.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
1.5SMC91CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 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 junction temperature. It is widely used to protect automotive sensor interfaces and industrial I/O lines against lightning-induced transients.
For engineers reviewing the 1.5SMC91CA-M3/57T datasheet, 1.5SMC91CA-M3/57T pinout, 1.5SMC91CA-M3/57T application, or 1.5SMC91CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.31), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
The 1.5SMC91CA-M3/57T employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and surge events. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting AC-coupled lines and differential buses like CAN FD or RS-485 where reverse voltage tolerance is critical.
It delivers 12 A peak pulse current (IPPM) under 10/1000 μs waveform with 125 V clamping voltage (VC), achieving a clamping ratio of 1.31 relative to nominal VBR. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation on standard 8 mm × 8 mm copper pads without forced cooling.
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 in either direction |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; sets safe operating margin below VBR |
| VC @ IPPM | 125 V at 12 A - clamped voltage during 1500 W surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity |
| IPPM | 12 A - peak pulse current capacity; defines minimum trace width and PCB layout requirements for surge path |
| TJ range | -65 °C to +150 °C - wide operating junction temperature enables use in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, lead-free and halogen-free (M3 suffix). No polarity marking - bidirectional device with symmetrical terminal behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (positive half-cycle) | Conducts during positive transients; connects to line being protected |
| Cathode | Surge current entry point (negative half-cycle) | Conducts during negative transients; connects to same line as Anode - no polarity distinction required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses without external polarity management |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity up to 4 kV (line-earth) and 2 kV (line-line) with proper PCB layout |
| Low clamping ratio (VC/VBR = 1.31) | Minimizes overvoltage stress on downstream ICs such as microcontrollers or transceivers during surge events |
| Halogen-free & RoHS-compliant (M3) | Complies with IPC-1752A material declaration requirements and EU Directive 2011/65/EU Annex II |
| MSL Level 1 rating | Allows unlimited floor life and reflow soldering at peak temperature up to 260 °C without baking |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±100 V transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in 3.3 V ADC front-ends while maintaining signal integrity below 77.8 V normal operation. |
Use Scenario: Shielding RS-485 transceivers in factory automation PLCs from ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Placed across A/B differential pair to limit common-mode voltage excursion during 4 kV contact discharge per IEC 61000-4-4. Use Value: Ensures bus remains operational after repeated 1500 W surges without degrading data integrity or requiring system reset. |
| Telecom DSL Line Protection | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding ADSL/VDSL line drivers against lightning-induced longitudinal surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected between tip/ring and chassis ground to shunt 10/1000 μs surges before reaching line transformer. Use Value: Maintains >60 dB return loss up to 30 MHz while surviving 10 kA open-circuit lightning simulations per ITU-T K.20. |
Use Scenario: Protecting MCU GPIOs driving brushed DC motors in washing machines from inductive kickback during commutation. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb 1500 W energy from L·di/dt spikes when MOSFETs switch off. Use Value: Eliminates need for snubber RC networks, reducing BOM count and board space while meeting IEC 61000-4-5 Class B immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher VC/VBR ratio (1.43) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when space-constrained layouts require smaller footprint and surge threat level is ≤600 W |
| 1.5KE91CA | Through-hole TO-204AE (DO-201AE) package, identical electrical specs but no MSL Level 1 or halogen-free certification | Not suitable for high-volume SMT production; requires wave soldering and lacks J-STD-020 compliance | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ91CA and 1.5KE91CA, the 1.5SMC91CA-M3/57T uniquely combines 1500 W surge capability, SMT scalability, MSL Level 1 reliability, and halogen-free compliance-making it the preferred choice for automotive-grade and high-volume industrial designs requiring zero rework risk and full regulatory alignment.
Availability
1.5SMC91CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom DSL line safeguarding requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for 1.5SMC91CA-M3/57T 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, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in harsh environments-including automotive powertrain, industrial controls, and infrastructure communications-where robustness and repeatable clamping performance are non-negotiable.
FAQ
What is the breakdown voltage tolerance for 1.5SMC91CA-M3/57T?
The 1.5SMC91CA-M3/57T has a specified breakdown voltage range of 86.5 V to 95.5 V at test current IT = 1 mA, representing ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage margin design in safety-critical systems.
Is 1.5SMC91CA-M3/57T qualified to AEC-Q101?
The 1.5SMC91CA-M3/57T itself is not AEC-Q101 qualified; however, its automotive-grade variant - 1.5SMC91CAHM3_A/H - carries full AEC-Q101 qualification. The M3 suffix indicates halogen-free and RoHS compliance, but AEC-Q101 requires additional stress testing and lot traceability documented under HM3 automotive ordering codes.
What is the maximum clamping voltage of 1.5SMC91CA-M3/57T under surge conditions?
The 1.5SMC91CA-M3/57T exhibits a maximum clamping voltage (VC) of 125 V when subjected to its rated 12 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream IC overvoltage protection margining.
Can 1.5SMC91CA-M3/57T be used in unidirectional configurations?
No - the "CA" suffix explicitly denotes bidirectional construction. The 1.5SMC91CA-M3/57T has no cathode marking and conducts symmetrically in both directions. For unidirectional use, the correct part is 1.5SMC91A-M3/57T, which includes a band-marked cathode and different VBR/VWM specifications.
What PCB pad layout is recommended for optimal thermal performance of 1.5SMC91CA-M3/57T?
Vishay specifies mounting the 1.5SMC91CA-M3/57T on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and thermal resistance of 75 °C/W. Reducing pad area below this de-rates both surge capability and steady-state power dissipation, potentially causing premature failure under repetitive transients.
1.5SMC91CA-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC91CA-M3/57T FAQ
1.How can I place an order for 1.5SMC91CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CA-M3/57T 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 1.5SMC91CA-M3/57T reliable?
The price and inventory of 1.5SMC91CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CA-M3/57T?
1.5SMC91CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CA-M3/57T 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 1.5SMC91CA-M3/57T?
For technical support, including 1.5SMC91CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC91CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CA-M3/57T 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 1.5SMC91CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CA-M3/57T?
All 1.5SMC91CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CA-M3/57T, 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 1.5SMC91CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC91CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CA-M3/57T Tags
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ESD9B5.0ST5G
onsemi
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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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onsemi
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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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