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Vishay General Semiconductor - Diodes Division 1.5SMC91A-M3/57T
- Part No.:
- 1.5SMC91A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91A-M3/57T.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,512
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Product details
Overview
1.5SMC91A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 77.8 V stand-off voltage (VWM), and clamps transients to ≤125 V at 12.0 A peak pulse current (IPPM) under 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC91A-M3/57T datasheet, 1.5SMC91A-M3/57T pinout, 1.5SMC91A-M3/57T application, or 1.5SMC91A-M3/57T equivalent, this part delivers 1500 W peak pulse power, low incremental surge resistance, and AEC-Q101 qualification readiness (via HM3 suffix variants), with halogen-free, RoHS-compliant construction and MSL Level 1 moisture sensitivity rating.
Technical Context
The 1.5SMC91A-M3/57T operates as a unidirectional avalanche-clamping TVS diode, triggered when reverse voltage exceeds its 77.8 V stand-off threshold and fully clamping at ≤125 V during 10/1000 µs surges. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the SMC package supports automated placement and thermal dissipation via 8.0 mm × 8.0 mm copper pads.
It is rated for 150 °C maximum junction temperature, 6.5 W steady-state power dissipation, and 200 A non-repetitive forward surge current (IFSM). The cathode band denotes polarity, and its 0.106 %/°C temperature coefficient of VBR enables predictable voltage drift across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines reliable avalanche initiation range for overvoltage triggering |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤125 V at 12.0 A (10/1000 µs) - clamping voltage limiting stress on downstream components |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| IPPM | 12.0 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm body and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; defines reference for clamping action |
| Cathode | Avalanche conduction terminal / Surge current sink | Connected to protected line (e.g., power rail or signal); conducts surge current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables robust protection against lightning-induced surges and inductive switching transients in 12 V/24 V systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision for sensitive ICs |
| Glass passivated chip junction | Ensures long-term stability of breakdown voltage and leakage performance under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without preconditioning or special handling |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive and industrial end equipment globally |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Clamps 12 V rail transients to ≤125 V, preventing latch-up or permanent damage to 3.3 V/5 V logic interfaces downstream. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors from ESD and field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before reaching op-amp input stages. Use Value: Limits induced voltage to safe levels (<125 V) while maintaining signal integrity due to minimal parasitic capacitance and fast <1 ns response. |
| Telecom DC Power Input Protection | Consumer Equipment AC/DC Adapter Output Protection |
Use Scenario: Safeguarding PoE-powered switches and base stations against induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary-level TVS on hot-swap input stage, coordinated with upstream fuses and secondary-stage TVS arrays. Use Value: Absorbs 1500 W surges without degradation, enabling single-device protection for Class 4 PoE+ inputs per IEEE 802.3at. |
Use Scenario: Preventing surge propagation from wall adapters into USB-C PD controllers and charging ICs in laptops and tablets. IC Role / Device Role / Timing Role: Final-stage TVS on adapter output side, placed immediately before connector to suppress coupling from mains-side transients. Use Value: Halogen-free M3 construction meets IEC 62368-1 flammability and environmental requirements for end-user devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91A-E3/52 | Lower peak power (600 W), SMB (DO-214AA) package, same VBR range and unidirectional polarity | Reduced surge margin; suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD, not lightning) | Select when board space is constrained and threat level is limited to ESD or low-duty-cycle switching noise |
| 1.5KE91A | Through-hole DO-201AE package, identical electrical specs but incompatible mounting and thermal profile | Requires PCB redesign; not suitable for automated SMT production or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with 1.5SMC91A-M3/57T, SMBJ91A-E3/52 offers smaller footprint but sacrifices 60% peak power handling, while 1.5KE91A retains full electrical equivalence at the cost of manufacturability and thermal performance in SMT assemblies.
Availability
1.5SMC91A-M3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101-ready qualification path.
Supply support for 1.5SMC91A-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 application-specific ruggedization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where compact size, repeatable clamping, and AEC-Q101 readiness are critical design requirements.
FAQ
What is the clamping voltage of the 1.5SMC91A-M3/57T under a 10/1000 µs surge?
The 1.5SMC91A-M3/57T clamps to a maximum of 125 V when subjected to its rated 12.0 A peak pulse current under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and production lot, ensuring consistent protection margin for downstream 100 V-rated components.
Is the 1.5SMC91A-M3/57T suitable for automotive applications?
Yes - the 1.5SMC91A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family (with HM3 suffix variants). While the -M3/57T itself is commercial-grade, its construction, thermal rating (TJ = 150 °C), and surge performance align with automotive subsystem requirements such as body control modules and sensor interfaces.
What does the "M3" suffix indicate in 1.5SMC91A-M3/57T?
The "M3" suffix in 1.5SMC91A-M3/57T specifies halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance. It distinguishes this variant from the E3 (RoHS, non-halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) versions, confirming environmental compliance without automotive qualification.
How is polarity marked on the 1.5SMC91A-M3/57T?
The 1.5SMC91A-M3/57T is a unidirectional TVS diode with polarity indicated by a visible cathode band on the SMC (DO-214AB) package body. During PCB layout, the banded end must be routed to the protected line (e.g., 12 V rail), while the anode connects to ground - reversing this connection disables clamping functionality.
What is the maximum steady-state power dissipation for the 1.5SMC91A-M3/57T?
The 1.5SMC91A-M3/57T has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at TA = 50 °C. In real-world SMT layouts using recommended 8.0 mm × 8.0 mm copper pads per terminal, derating applies above 25 °C ambient per Figure 2 in the datasheet.
1.5SMC91A-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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC91A-M3/57T FAQ
1.How can I place an order for 1.5SMC91A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91A-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 1.5SMC91A-M3/57T reliable?
The price and inventory of 1.5SMC91A-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 1.5SMC91A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC91A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91A-M3/57T?
1.5SMC91A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91A-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 1.5SMC91A-M3/57T?
For technical support, including 1.5SMC91A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC91A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91A-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 1.5SMC91A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC91A-M3/57T?
All 1.5SMC91A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91A-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 1.5SMC91A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC91A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91A-M3/57T Tags
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