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Vishay General Semiconductor - Diodes Division 1.5SMC9.1AHE3/57T
- Part No.:
- 1.5SMC9.1AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1AHE3/57T.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,551
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Product details
Overview
1.5SMC9.1AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on 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 maximum clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the 1.5SMC9.1AHE3/57T datasheet, 1.5SMC9.1AHE3/57T pinout, 1.5SMC9.1AHE3/57T application, or 1.5SMC9.1AHE3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), polarity marking (cathode band), and real-world protection use cases - all confirmed from Vishay's official 1.5SMC Series specification document (Rev. 09-Mar-2026, Doc. #88303).
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VWM of 7.78 V while maintaining low leakage (<50 µA). Its 13.4 V clamping voltage at 12.0 A ensures robust protection for 5 V and 9 V rail circuits without overstressing downstream components.
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C), has matte tin-plated leads, and is RoHS-compliant and AEC-Q101 qualified - confirming suitability for automotive ECUs and industrial control modules where reliability under thermal cycling and surge stress is critical.
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 onset range for predictable clamping behavior |
| VWM | 7.78 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 13.4 V at 12.0 A - limits voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM | 1500 W - peak pulse power handling capability per standard 10/1000 µs waveform |
| IPPM | 12.0 A - maximum non-repetitive surge current the device safely clamps without failure |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads; cathode identified by a single band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or lower-potential node in unidirectional TVS configuration | Provides reference path for clamping action; must be tied to lowest potential point in protected circuit |
| Cathode | Current exit terminal in forward bias; marked with band; connected to line being protected | Clamps voltage between cathode and anode when transient exceeds VWM; polarity-critical for correct protection orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| 1500 W peak pulse power | Withstands high-energy transients from load dump or inductive switching without degradation |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors |
| MSL Level 1 moisture sensitivity | Enables direct placement into reflow ovens without baking, reducing manufacturing overhead |
| Glass-passivated junction | Ensures stable VBR and low leakage across temperature and lifetime |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 9 V supply rails in automotive body control modules against ISO 7637-2 Pulse 1 and Pulse 2a transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to shunt surge energy before reaching LDOs or microcontrollers. Use Value: Clamps 12.0 A surges to ≤13.4 V, preventing latch-up or damage to 12 V tolerant logic and analog front-ends. |
Use Scenario: Safeguarding RS-485 transceiver inputs in factory automation PLCs exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted directly at connector pins to divert fast transients before signal integrity is compromised. Use Value: Sub-10 ns response time and 13.4 V clamping preserve data integrity on 3.3 V or 5 V logic-level communication lines. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters during fault conditions like feedback loop failure. IC Role / Device Role / Timing Role: Standoff-rated TVS on 9 V output rail to limit voltage excursion during short-circuit or open-loop faults. Use Value: 7.78 V VWM allows normal operation while 13.4 V VC prevents damage to connected devices rated for ≤15 V absolute maximum. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeding lines. IC Role / Device Role / Timing Role: TVS placed across input terminals to absorb lightning-induced common-mode transients coupled onto Ethernet cabling. Use Value: 1500 W rating handles high-energy surges typical in outdoor telecom deployments without derating or parallel staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPPM (600 W), same VWM (7.2 V), slightly lower VC (12.6 V at 8.3 A), SMB package (smaller footprint) | Best suited for space-constrained consumer electronics with lower surge exposure | Select when board area is limited and peak surge energy does not exceed 600 W |
| 1.5KE9.1A | Through-hole TO-204AA (DO-41), identical VBR/VC specs but higher RθJA (~100 °C/W), no AEC-Q101 qualification | Used in legacy industrial designs requiring manual assembly or high-reliability through-hole mounting | Choose only for prototyping or non-automotive production where SMT is unavailable |
Compared with 1.5SMC9.1AHE3/57T, SMBJ9.0A trades surge capacity for compactness, while 1.5KE9.1A sacrifices AEC-Q101 compliance and thermal performance for through-hole compatibility - making 1.5SMC9.1AHE3/57T the optimal choice for volume automotive and industrial SMT production requiring validated reliability and 1500 W clamping headroom.
Availability
1.5SMC9.1AHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeding systems requiring stable component supply, AEC-Q101 validation, and consistent 1500 W transient suppression performance.
Supply support for 1.5SMC9.1AHE3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-grade, and industry-standard solutions.
The 1.5SMC Series was developed specifically for surface-mount transient voltage suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-power surge immunity, AEC-Q101 qualification, and SMT manufacturability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC9.1AHE3/57T under a 10/1000 µs surge?
The 1.5SMC9.1AHE3/57T exhibits a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 12.0 A using the standard 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay's 1.5SMC Series datasheet (Doc. #88303, Rev. 09-Mar-2026) and reflects worst-case voltage seen by protected circuitry during surge events.
Is the 1.5SMC9.1AHE3/57T qualified for automotive applications?
Yes, the 1.5SMC9.1AHE3/57T carries AEC-Q101 qualification, confirmed by its "HE3" suffix and documentation in Vishay's 1.5SMC Series datasheet (page 1, Features section). This qualification validates its reliability for use in automotive powertrain, chassis, and body electronics where temperature cycling, humidity, and surge robustness are strictly regulated.
What does the "HE3/57T" suffix indicate in 1.5SMC9.1AHE3/57T?
The "HE3" denotes RoHS-compliant and AEC-Q101-qualified construction, while "/57T" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units - per Vishay's Ordering Information table (page 3, Doc. #88303). This format ensures compatibility with high-speed pick-and-place equipment and supports automotive traceability requirements.
How does the 1.5SMC9.1AHE3/57T compare to bidirectional TVS diodes like 1.5SMC9.1CA?
The 1.5SMC9.1AHE3/57T is unidirectional and intended for DC line protection with defined polarity (cathode band); 1.5SMC9.1CA is bidirectional and used on AC or floating lines. Their VBR, VWM, and VC values differ: the CA version has symmetric breakdown in both directions and higher VWM (8.2 V vs. 7.78 V), making them non-interchangeable without circuit redesign.
What is the thermal resistance of the 1.5SMC9.1AHE3/57T, and how does it affect layout?
The 1.5SMC9.1AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal - as specified in the Thermal Characteristics table (page 3, Doc. #88303). To maintain safe operation under repetitive surges, PCB layout must replicate this pad area and avoid excessive trace impedance to ground.
1.5SMC9.1AHE3/57T 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC9.1AHE3/57T FAQ
1.How can I place an order for 1.5SMC9.1AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1AHE3/57T 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 1.5SMC9.1AHE3/57T reliable?
The price and inventory of 1.5SMC9.1AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1AHE3/57T?
1.5SMC9.1AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1AHE3/57T 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 1.5SMC9.1AHE3/57T?
For technical support, including 1.5SMC9.1AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC9.1AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1AHE3/57T 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 1.5SMC9.1AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1AHE3/57T?
All 1.5SMC9.1AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1AHE3/57T, 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 1.5SMC9.1AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC9.1AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1AHE3/57T Tags
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