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Taiwan Semiconductor Corporation 1.5SMC9.1AH
- Part No.:
- 1.5SMC9.1AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1AH.pdf
- Description:
- 1500W, 9.1V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,781
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Product details
Overview
1.5SMC9.1AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level surge protection in DC power rails and signal lines. It features a 9.1 V nominal breakdown voltage (VBR = 8.65–9.55 V), 1500 W peak pulse power rating (10/1000 µs waveform), clamping voltage of 13.4 V at 12.6 A, and low leakage current (<1 µA at 7.78 V). It is widely deployed in automotive body control modules to protect CAN transceivers from ISO 7637-2 Pulse 1 and Pulse 2b transients.
For engineers reviewing the 1.5SMC9.1AH datasheet, 1.5SMC9.1AH pinout, 1.5SMC9.1AH application, or 1.5SMC9.1AH equivalent, key selection criteria include its unidirectional polarity, DO-214AB (SMC) package compatibility with automated SMT placement, AEC-Q101 qualification, and verified clamping performance under standardized load-dump and ESD-like surge conditions.
Technical Context
This TVS operates as a voltage-clamped shunt device: when transient voltage exceeds its breakdown threshold (VBR), it rapidly avalanches into low-impedance conduction-diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling.
It complies with ISO 7637-2 for automotive transients (Pulse 1, 2a, 2b, 3a, 3b), supports fast response time (<1.0 ps), and maintains <1 µA blocking leakage at rated working stand-off voltage (VWM = 7.78 V). The device is rated for junction temperatures from –55 °C to +150 °C and meets J-STD-020 moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 8.65–9.55 V - Ensures precise, repeatable avalanche initiation within ±5% tolerance for predictable clamping onset |
| VWM | 7.78 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM = 12.6 A | 13.4 V - Clamped voltage seen by protected IC during full-rated 1500 W transient, limiting stress on downstream components |
| IPPM | 12.6 A - Peak surge current capability under 10/1000 µs waveform, defining maximum energy absorption per event |
| PPK | 1500 W - Peak pulse power handling capacity, enabling robust protection against ISO 7637-2 load dump surges |
| Junction Temp Range | –55 °C to +150 °C - Supports operation in under-hood automotive environments and industrial enclosures |
| Thermal Resistance RθJC | 15 °C/W - Enables effective heat transfer from junction to case under high-duty-cycle surge conditions |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads; RoHS and halogen-free compliant; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., CAN_H or 12 V rail); conducts surge current toward ground when clamped |
| Cathode | Ground reference | Connected to system ground plane; defines polarity and establishes clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, mechanical shock, and humidity testing per JEDEC standards |
| Glass passivated junction | Enhances long-term stability of VBR and reduces parameter drift over lifetime and thermal stress |
| ISO 7637-2 compliance | Guarantees functional immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without failure or parametric shift |
| Fast response time <1.0 ps | Enables clamping before sensitive downstream ICs experience overvoltage stress during ESD or fast-rising transients |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or baking prior to reflow, simplifying manufacturing and reducing cost |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs and LIN bus lines in BCMs exposed to battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 13.4 V during 12.6 A surges, ensuring downstream 16 V-rated regulators remain within safe operating area. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subjected to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point to absorb repetitive 1500 W transients before signal conditioning circuitry. Use Value: Withstands >100,000 surge events at rated PPK, maintaining VC ≤13.4 V and preventing false triggering of optocouplers or Schmitt triggers. |
| Telecom Power Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding PoE-powered Ethernet port DC-DC converter inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage TVS on 48 V input rail, coordinated with secondary GDT or MOV for staged protection. Use Value: Fast <1.0 ps response captures initial surge edge; 1500 W rating handles multi-kA induced currents per IEC 61000-4-5 Level 4. |
Use Scenario: Protecting MCU GPIOs and gate drivers on washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on low-voltage control signals (e.g., hall sensor lines) referenced to isolated ground. Use Value: Low VWM (7.78 V) allows use on 5 V or 3.3 V logic rails without leakage interference; 1 µA IR ensures no signal integrity degradation. |
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 PPK (600 W), same DO-214AA package, VBR = 10.0–11.1 V, VC = 14.4 V @ 24.6 A | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary |
| 1.5KE9.1A | Through-hole DO-15 package, identical VBR/VC specs but slower thermal response; PPK = 1500 W | Requires manual or wave soldering; incompatible with high-speed SMT lines | Choose only for legacy through-hole designs or prototyping where board space permits larger footprint |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5SMC9.1AH uniquely combines AEC-Q101 qualification, surface-mount DO-214AB packaging, and full 1500 W surge capability-making it the preferred choice for production automotive and industrial SMT assemblies requiring zero rework risk and validated reliability.
Availability
1.5SMC9.1AH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom power interface designs requiring stable component supply across extended product lifecycles.
Supply support for 1.5SMC9.1AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The 1.5SMC series was engineered specifically for high-reliability automotive and industrial surge protection, emphasizing AEC-Q101 compliance, tight VBR tolerance, and robust thermal performance in compact SMC packages.
FAQ
What is the polarity configuration of the 1.5SMC9.1AH?
The 1.5SMC9.1AH is a unidirectional TVS diode, with a clearly marked cathode band indicating the terminal that must be connected to system ground. Its electrical characteristics-including VBR, VWM, and VC-are specified only for forward-biased avalanche operation (anode positive relative to cathode), and it does not conduct in reverse bias beyond leakage current.
Is the 1.5SMC9.1AH suitable for bidirectional transient protection?
No-the 1.5SMC9.1AH is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor offers the 1.5SMC9.1CAH variant, which uses a center-tapped dual-die configuration to provide symmetrical clamping in both polarities. Using the 1.5SMC9.1AH in bidirectional applications risks permanent damage during negative-going transients.
What is the maximum clamping voltage of the 1.5SMC9.1AH under rated surge conditions?
The 1.5SMC9.1AH exhibits a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 12.6 A (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, and forms the basis for downstream component voltage derating in protected circuits.
Does the 1.5SMC9.1AH require derating at elevated ambient temperatures?
Yes-the 1500 W peak pulse power rating applies only at TA = 25 °C. Per Figure 2 in the datasheet, power capability derates linearly above 25 °C, reaching ~750 W at 75 °C and ~300 W at 125 °C. Designers must apply this derating curve when sizing protection for under-hood or enclosed industrial environments.
How does the 1.5SMC9.1AH compare to the 1.5SMC9.1H variant?
The 1.5SMC9.1AH has tighter breakdown voltage tolerance (8.65–9.55 V, ±5%) versus the 1.5SMC9.1H (8.19–10.00 V, ±10%), lower VWM (7.78 V vs. 7.37 V), and slightly improved clamping (13.4 V vs. 13.8 V at same IPPM). Both share identical package, power rating, and AEC-Q101 qualification-but the "A" grade enables more precise system-level voltage margining.
1.5SMC9.1AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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):
- 117A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC9.1AH FAQ
1.How can I place an order for 1.5SMC9.1AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1AH 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 1.5SMC9.1AH reliable?
The price and inventory of 1.5SMC9.1AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1AH?
1.5SMC9.1AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1AH 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 1.5SMC9.1AH?
For technical support, including 1.5SMC9.1AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1AH requirements.
6.How does Aetrix verify that 1.5SMC9.1AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1AH 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 1.5SMC9.1AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1AH?
All 1.5SMC9.1AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1AH, 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 1.5SMC9.1AH part is unused and in its original packaging.
Return procedure for 1.5SMC9.1AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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