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Vishay General Semiconductor - Diodes Division 1.5SMC9.1AHM3/H
- Part No.:
- 1.5SMC9.1AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1AHM3/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,583
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Product details
Overview
1.5SMC9.1AHM3/H from Vishay General Semiconductor is a unidirectional 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 maximum 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 power supply rails.
For engineers reviewing the 1.5SMC9.1AHM3/H datasheet, 1.5SMC9.1AHM3/H pinout, 1.5SMC9.1AHM3/H application, or 1.5SMC9.1AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMC (DO-214AB) surface-mount package, low 0.068 %/°C VBR temperature coefficient, and verified clamping performance under repetitive surge conditions.
Technical Context
The 1.5SMC9.1AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response (<1 ps) to ESD and lightning-induced transients. Its clamping action begins at VWM = 7.78 V and limits voltage to ≤13.4 V at IPPM = 112 A, enabling reliable protection of downstream 5 V or 3.3 V logic circuits without latch-up risk.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C. The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA - defines precise avalanche initiation threshold for repeatable protection triggering |
| Stand-off Voltage VWM | 7.78 V - ensures no conduction during normal 5 V rail operation with 22 % margin above nominal |
| Clamping Voltage VC | 13.4 V at 112 A (10/1000 µs) - limits transient voltage seen by protected ICs to safe levels |
| Peak Pulse Power PPPM | 1500 W - sustains high-energy surges common in automotive load-dump and industrial switching events |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and wide-temperature industrial deployments |
| Package | SMC (DO-214AB) - industry-standard 2-pin SMD footprint with 8.0 mm × 8.0 mm copper pad thermal requirement |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive-grade reliability including temperature cycling and humidity testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band on body; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., 5 V supply rail or CAN bus line); conducts during reverse-biased surge |
| Cathode | Ground reference | Connected to system ground plane; establishes clamping path; band-marked end must align with PCB cathode indicator |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power inputs |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20D; supports green manufacturing and end-of-life compliance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV), preserving signal integrity |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or moisture sensitivity handling |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting 5 V analog sensor outputs (e.g., pressure, temperature) in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and chassis ground to clamp transients before reaching ADC input. Use Value: Limits voltage to ≤13.4 V during 112 A surge, preventing damage to 12-bit SAR ADCs with 5.5 V absolute max rating. |
Use Scenario: Input-stage protection on 24 V DC industrial PLC power supplies exposed to inductive switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge limiter upstream of bulk capacitor and LDO regulator; absorbs energy before filtering stage. Use Value: Withstands 1500 W peak pulses while maintaining <1 µA leakage at 7.78 V, avoiding standby current degradation. |
| Telecom Line Interface | Consumer USB Power Rail |
Use Scenario: Secondary protection on RS-485 transceiver VCC pins in outdoor telecom cabinets subjected to induced lightning surges. IC Role / Device Role / Timing Role: Fast-clamping TVS parallel to local 5 V rail, triggered after primary gas discharge tube (GDT) crowbar action. Use Value: Sub-13.4 V clamping prevents latch-up in isolated RS-485 drivers rated for 6 V max VCC stress. |
Use Scenario: Overvoltage safeguard on USB-C 5 V VBUS line in portable audio devices where hot-plug insertion may cause transient spikes. IC Role / Device Role / Timing Role: Unidirectional shunt protector between VBUS and GND, sized to survive repeated 10/1000 µs surges without parametric shift. Use Value: 7.78 V VWM provides 550 mV margin above 5 V ±5 % spec, ensuring zero false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Lower PPPM = 400 W; VBR = 10.0–11.1 V; SMA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to consumer-grade 5 V rail protection | Select when cost and board space outweigh automotive reliability requirements |
| 1.5KE9.1A | Through-hole DO-201 package; identical VBR/VC specs but higher RθJA = 100 °C/W | Requires manual assembly; unsuitable for automated SMT lines or high-density layouts | Select only for legacy through-hole designs or prototyping where rework tolerance is prioritized |
Compared with SMAJ9.0A and 1.5KE9.1A, the 1.5SMC9.1AHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC package thermal performance - making it the only option qualified for production automotive electronics requiring both high energy absorption and automated manufacturing compliance.
Availability
1.5SMC9.1AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power supply inputs, telecom line protection, and consumer USB power rail applications requiring stable component supply across extended product lifecycles.
Supply support for 1.5SMC9.1AHM3/H 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 reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5SMC9.1AHM3/H under maximum surge conditions?
The 1.5SMC9.1AHM3/H has a maximum clamping voltage (VC) of 13.4 V at 112 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and ensures protected circuitry remains within safe operating limits during standardized surge events such as IEC 61000-4-5.
Is the 1.5SMC9.1AHM3/H suitable for automotive applications?
Yes, the 1.5SMC9.1AHM3/H is AEC-Q101 qualified (denoted by the HM3 suffix) and specifically tested for automotive reliability including temperature cycling, humidity bias, and mechanical shock. It is widely used in engine control modules, ADAS camera power inputs, and body electronics where sustained surge immunity is required.
What does the "HM3" suffix indicate in 1.5SMC9.1AHM3/H?
The "HM3" suffix in 1.5SMC9.1AHM3/H signifies halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It replaces older "E3" commercial-grade variants and ensures compliance with automotive environmental standards and green manufacturing directives.
How does the 1.5SMC9.1AHM3/H compare to bidirectional TVS diodes like 1.5SMC9.1CA?
The 1.5SMC9.1AHM3/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., 5 V supply rails). In contrast, 1.5SMC9.1CA is bidirectional and suited for AC or differential signal lines (e.g., RS-485). Using the unidirectional 1.5SMC9.1AHM3/H on AC lines would result in forward conduction during negative half-cycles.
What is the thermal resistance of the 1.5SMC9.1AHM3/H, and how does it affect layout design?
The 1.5SMC9.1AHM3/H 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 TJ ≤ 150 °C under continuous 6.5 W dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks near the SMC footprint.
1.5SMC9.1AHM3/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC9.1AHM3/H FAQ
1.How can I place an order for 1.5SMC9.1AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1AHM3/H 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 1.5SMC9.1AHM3/H reliable?
The price and inventory of 1.5SMC9.1AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1AHM3/H?
1.5SMC9.1AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1AHM3/H 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 1.5SMC9.1AHM3/H?
For technical support, including 1.5SMC9.1AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC9.1AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1AHM3/H 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 1.5SMC9.1AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1AHM3/H?
All 1.5SMC9.1AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1AHM3/H, 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 1.5SMC9.1AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC9.1AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1AHM3/H Tags
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