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Vishay General Semiconductor - Diodes Division 1.5SMC9.1A-E3/57T
- Part No.:
- 1.5SMC9.1A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1A-E3/57T.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,640
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Product details
Overview
1.5SMC9.1A-E3/57T 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), clamps transients to ≤13.4 V at 50 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 DC power rail surge suppression.
For engineers reviewing the 1.5SMC9.1A-E3/57T datasheet, 1.5SMC9.1A-E3/57T pinout, 1.5SMC9.1A-E3/57T application, or 1.5SMC9.1A-E3/57T equivalent, this page provides verified electrical parameters, SMC (DO-214AB) package details, clamping performance under standardized surge conditions, and validated alternative parts for design-in flexibility and supply continuity.
Technical Context
The 1.5SMC9.1A-E3/57T operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse-biased breakdown behavior. Its clamping action begins at VWM = 7.78 V and fully engages at VBR = 8.65–9.55 V, limiting transient voltages to ≤13.4 V at IPPM = 50 A with <1 ns response time and low incremental surge resistance.
Thermally, it supports operation from –65 °C to +150 °C (TJmax), with RθJA = 75 °C/W and RθJL = 15 °C/W, and is rated for 6.5 W steady-state power dissipation on an infinite heatsink at 50 °C. It meets J-STD-020 MSL Level 1 and is RoHS-compliant (E3 suffix), with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise avalanche onset window for reliable triggering |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | ≤13.4 V at 50 A (10/1000 µs) - ensures protected ICs see no more than 13.4 V during worst-case surge |
| IPPM | 50 A - peak surge current capability under standardized 10/1000 µs waveform |
| PPPM | 1500 W - peak pulse power handling capacity, enabling protection against lightning-induced surges |
| TJmax | +150 °C - junction temperature limit supporting under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity indicated by cathode band; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse polarity events) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 12 V/24 V rails |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot during clamping, reducing stress on downstream MOSFETs and microcontrollers |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
| RoHS-compliant E3 suffix | Meets global environmental compliance requirements without halogen-free trade-offs in surge performance |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping negative-going transients while blocking normal operating voltage. Use Value: Limits transient voltage to ≤13.4 V, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs per ISO 7637-2 Pulse 1/2a/5a requirements. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to 24 V DC field wiring surges from relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, absorbing repetitive 1500 W pulses without degradation across 100,000+ cycles. Use Value: Maintains VWM = 7.78 V margin above 24 V nominal rail (derated), ensuring no false triggering during brownout or ripple conditions. |
| DC Power Rail Surge Suppression | Consumer Power Adapter Output Protection |
Use Scenario: Secondary-side overvoltage clamp on 12 V/19 V DC-DC converter outputs feeding laptops, monitors, or PoE-powered devices. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor tied between output rail and ground, activated within <1 ns of overvoltage event. Use Value: Clamps 10/1000 µs surges to ≤13.4 V, preserving downstream USB-PD controllers and display timing ICs rated for ≤20 V absolute maximum. |
Use Scenario: Output-stage protection in wall-mounted AC/DC adapters for smart home hubs and IoT gateways subject to mains-borne surges. IC Role / Device Role / Timing Role: Final-line defense after primary-side MOV and secondary-side filtering, handling residual fast transients missed by bulk capacitance. Use Value: Delivers 1500 W pulse rating with <5 % duty cycle tolerance, enabling compact adapter designs without derating or parallel devices. |
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) | Best suited for space-constrained consumer electronics where 600 W surge immunity suffices | Select when board area is critical and surge threat level is limited to IEC 61000-4-4 Level 3 |
| 1.5KE9.1A | Through-hole TO-204AA (DO-41); identical VBR, VWM, VC; PPPM = 1500 W but slower thermal recovery | Used in legacy industrial power supplies and repair scenarios requiring through-hole compatibility | Choose only when SMT assembly is unavailable or mechanical robustness under vibration is prioritized over density |
Compared with 1.5SMC9.1A-E3/57T, SMBJ9.0A trades surge margin for PCB area savings, while 1.5KE9.1A retains full power rating but sacrifices automated placement efficiency and thermal performance in high-density layouts.
Availability
1.5SMC9.1A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail surge suppression requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for 1.5SMC9.1A-E3/57T 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be mitigated without compromising size or manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC9.1A-E3/57T under a 50 A transient?
The 1.5SMC9.1A-E3/57T clamps to a maximum of 13.4 V when subjected to a 10/1000 µs waveform at 50 A peak pulse current (IPPM). This value is guaranteed per Vishay's datasheet (Document Number 88303, Rev. 09-Mar-2026) and reflects worst-case device variation across temperature and lot. The 1.5SMC9.1A-E3/57T achieves this clamping with minimal overshoot due to its low incremental surge resistance and sub-nanosecond response.
Is the 1.5SMC9.1A-E3/57T suitable for automotive applications?
The 1.5SMC9.1A-E3/57T is RoHS-compliant and manufactured to commercial-grade specifications (E3 suffix). While not AEC-Q101 qualified itself, it belongs to the 1.5SMC family where AEC-Q101 variants exist (e.g., 1.5SMC9.1AHE3_A). For production automotive use, engineers should specify the HE3-suffixed version; the 1.5SMC9.1A-E3/57T remains appropriate for prototyping, non-safety-critical subsystems, or cost-sensitive Tier 2 industrial designs.
What is the standoff voltage (VWM) of the 1.5SMC9.1A-E3/57T, and why does it matter?
The 1.5SMC9.1A-E3/57T has a maximum reverse standoff voltage (VWM) of 7.78 V, meaning it remains in high-impedance state up to that voltage with leakage <50 µA. This parameter ensures no false triggering during normal operation - for example, on a 5 V rail with ±10 % tolerance (up to 5.5 V), the 1.5SMC9.1A-E3/57T provides ample margin while still responding promptly to transients exceeding 7.78 V.
How does the SMC (DO-214AB) package of the 1.5SMC9.1A-E3/57T compare thermally to SMA or SMB packages?
The SMC (DO-214AB) package used by the 1.5SMC9.1A-E3/57T offers superior thermal performance versus smaller packages: its RθJA = 75 °C/W (on 8.0 mm × 8.0 mm pads) is ~30 % lower than SMB (RθJA ≈ 110 °C/W) and ~50 % lower than SMA (RθJA ≈ 150 °C/W). This enables the 1.5SMC9.1A-E3/57T to sustain higher average power dissipation and recover faster between surges - critical in repetitive industrial surge environments.
Can the 1.5SMC9.1A-E3/57T replace a 1N6267A in an existing design?
Yes - the 1.5SMC9.1A-E3/57T is a direct functional and parametric upgrade to the legacy 1N6267A (VBR = 8.65–9.55 V, VC = 13.4 V, PPPM = 1500 W), offering identical electrical specs in a surface-mount SMC package instead of axial DO-15. No circuit modification is needed beyond adapting the footprint; the 1.5SMC9.1A-E3/57T improves manufacturability, reduces board space, and enhances thermal reliability over the 1N6267A.
1.5SMC9.1A-E3/57T 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-E3/57T FAQ
1.How can I place an order for 1.5SMC9.1A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1A-E3/57T 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-E3/57T reliable?
The price and inventory of 1.5SMC9.1A-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1A-E3/57T?
1.5SMC9.1A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1A-E3/57T 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-E3/57T?
For technical support, including 1.5SMC9.1A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC9.1A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1A-E3/57T?
All 1.5SMC9.1A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC9.1A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1A-E3/57T Tags
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