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Vishay General Semiconductor - Diodes Division 1.5SMC9.1A-M3/57T
- Part No.:
- 1.5SMC9.1A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1A-M3/57T.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
1.5SMC9.1A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V clamping voltage (VC) at 112 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial DC power rails.
For engineers reviewing the 1.5SMC9.1A-M3/57T datasheet, 1.5SMC9.1A-M3/57T pinout, 1.5SMC9.1A-M3/57T application, or 1.5SMC9.1A-M3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 112 A surge, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under transient overvoltage exceeding VWM = 7.78 V, it avalanches at VBR = 8.65–9.55 V and clamps the line to ≤13.4 V at 112 A, limiting energy dissipation via low incremental surge resistance. Its glass-passivated junction ensures stable breakdown and long-term reliability.
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supports 200 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across –65 °C to +150 °C junction temperature range - critical for under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA test current - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 μA; sets safe DC bias margin |
| VC @ IPPM | 13.4 V at 112 A peak pulse - actual clamped voltage during 1500 W transient, directly limiting downstream IC stress |
| PPPM | 1500 W with 10/1000 µs waveform - quantifies single-event surge energy handling capability per industry standard |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; determines derating above 25 °C |
| IFSM | 200 A (8.3 ms half-sine) - peak forward surge rating confirms robustness against inductive turn-off spikes in power circuits |
| TJ max. | +150 °C - maximum junction temperature enabling use in high-ambient environments like engine control units |
Pinout & Package
Package: SMC (DO-214AB) - surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability and JESD 201 Class 2 whisker resistance. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return; completes shunt conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients (e.g., ISO 7637-2 Pulse 5a) without external series impedance |
| 13.4 V clamping at 112 A | Keeps downstream 5 V or 3.3 V logic rails within safe operating area during 10/1000 µs surges |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free & RoHS-compliant (M3) | Meets global environmental regulations and supports lead-free assembly without compromising thermal performance |
| –65 °C to +150 °C operating range | Validates suitability for under-hood automotive, industrial motor drives, and outdoor telecom equipment |
Applications
| Automotive Sensor Protection | Industrial DC Power Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, responding in <1 ps to clamp overvoltage before IC damage occurs. Use Value: Clamps to 13.4 V while absorbing 1500 W surges, preserving signal integrity and preventing latch-up in 5 V tolerant transceivers. |
Use Scenario: Safeguarding 12 V/24 V DC input stages of PLC modules, HMIs, and motor controllers against ISO 16750-2 supply transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary front-end TVS in series with fuse and common-mode choke; conducts full surge current to ground during line-to-ground faults. Use Value: Withstands 200 A 8.3 ms surge and maintains VC ≤13.4 V, ensuring upstream regulators and DC-DC converters remain undamaged. |
| Consumer Power Adapter Output | Telecom Line Interface |
|
Use Scenario: Secondary-side overvoltage suppression on USB-C PD and AC/DC adapter outputs to prevent damage to connected devices during regulation failure. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp between VOUT and GND, triggered only when output exceeds 7.78 V nominal. Use Value: Low 75 °C/W RθJA allows self-heating control during repetitive surges; halogen-free M3 suffix complies with IEC 61249-2-21. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges on twisted-pair telecom interfaces per ITU-T K.21. IC Role / Device Role / Timing Role: First-stage shunt protector on differential pair; used with series impedance to shape transient response and limit current. Use Value: Precise 8.65–9.55 V VBR ensures activation before PHY absolute maximum ratings are exceeded, with minimal capacitance impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPPM = 600 W; same VBR range (8.55–9.45 V); SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced pad area. |
| 1.5KE9.1A | Through-hole TO-204AA (DO-41); identical electrical specs but larger size and manual assembly requirement | Used where legacy through-hole design or higher mechanical robustness is prioritized over SMT automation | Choose for prototyping, repair, or high-vibration environments where solder joint reliability outweighs assembly efficiency. |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5SMC9.1A-M3/57T delivers 2.5× higher surge power in an automated SMT package with superior thermal performance and halogen-free compliance - making it optimal for volume automotive and industrial production.
Availability
1.5SMC9.1A-M3/57T is available at Aetrix Electronics and suitable for automotive ECU protection, industrial DC power input conditioning, and telecom line interface hardening requiring stable component supply, consistent M3-grade environmental compliance, and verified 1500 W surge handling.
Supply support for 1.5SMC9.1A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing fast response, repeatable clamping, and AEC-Q101 qualification readiness.
FAQ
What is the clamping voltage of the 1.5SMC9.1A-M3/57T under maximum surge conditions?
The 1.5SMC9.1A-M3/57T clamps to a maximum of 13.4 V when subjected to its rated 112 A peak pulse current (10/1000 µs waveform). This value is measured per standard test conditions and reflects the actual voltage seen by downstream circuitry during transient events - critical for ensuring compatibility with 5 V or 3.3 V logic interfaces.
Is the 1.5SMC9.1A-M3/57T suitable for automotive applications?
Yes, the 1.5SMC9.1A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the specific 1.5SMC9.1A-M3/57T variant is commercial-grade, its construction, thermal rating (TJ max = +150 °C), and surge capability align with automotive subsystem requirements such as body control modules and sensor interfaces.
How does the 1.5SMC9.1A-M3/57T differ from bidirectional variants like 1.5SMC9.1CA?
The 1.5SMC9.1A-M3/57T is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC9.1CA is bidirectional with no polarity marking and symmetric clamping in both directions. The 1.5SMC9.1A-M3/57T is intended for DC-biased lines (e.g., power rails), while the CA version suits AC-coupled or floating signal paths like data lines.
What is the thermal resistance of the 1.5SMC9.1A-M3/57T, and how does it affect layout?
The 1.5SMC9.1A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain reliability under repeated surges, PCB layout must replicate this minimum pad area; reducing pad size increases thermal impedance and risks premature thermal runaway during high-duty-cycle transients.
Does the 1.5SMC9.1A-M3/57T require derating at elevated ambient temperatures?
Yes, the 1.5SMC9.1A-M3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Doc. #88303). At 85 °C ambient, its peak pulse power drops to approximately 750 W - meaning designers must confirm that worst-case surge energy remains within the derated envelope, especially in enclosed industrial enclosures or under-hood locations.
1.5SMC9.1A-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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
1.5SMC9.1A-M3/57T FAQ
1.How can I place an order for 1.5SMC9.1A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1A-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 1.5SMC9.1A-M3/57T reliable?
The price and inventory of 1.5SMC9.1A-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 1.5SMC9.1A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1A-M3/57T?
1.5SMC9.1A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1A-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 1.5SMC9.1A-M3/57T?
For technical support, including 1.5SMC9.1A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC9.1A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1A-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 1.5SMC9.1A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1A-M3/57T?
All 1.5SMC9.1A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1A-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 1.5SMC9.1A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC9.1A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1A-M3/57T Tags
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