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Taiwan Semiconductor Corporation 1.5SMC9.1CA
- Part No.:
- 1.5SMC9.1CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CA.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,887
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Product details
Overview
1.5SMC9.1CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 8.65–9.55 V at 1.0 mA test current, working stand-off voltage 7.78 V, clamping voltage 13.4 V at 12.6 A peak pulse current, and junction temperature range −55 °C to +150 °C - deployed for ESD and lightning surge protection on DC power rails and I/O lines in telecom interfaces.
For engineers reviewing the 1.5SMC9.1CA datasheet, 1.5SMC9.1CA pinout, 1.5SMC9.1CA application, or 1.5SMC9.1CA equivalent, this page delivers verified electrical specs, thermal resistance values, bidirectional clamping behavior, JEDEC-compliant SMC package dimensions, and RoHS/halogen-free compliance status per IEC 61249-2-21.
Technical Context
The 1.5SMC9.1CA uses a glass-passivated silicon junction optimized for fast transient response (<1.0 ps), low leakage (<1 µA at 7.78 V), and stable bidirectional clamping across both polarities. Its thermal design features RθJA = 50 °C/W and RθJC = 15 °C/W, enabling reliable operation under repetitive surge conditions when mounted on ≥1 cm² copper area.
It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for automated SMT assembly without pre-bake.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - sustains single 10/1000 µs surges up to 12.6 A without failure |
| Breakdown Voltage VBR | 8.65–9.55 V @ 1.0 mA - defines minimum voltage at which TVS enters avalanche conduction |
| Working Stand-off Voltage VWM | 7.78 V - maximum continuous DC or RMS voltage applied without significant leakage |
| Clamping Voltage VC | 13.4 V @ 12.6 A - limits downstream circuit voltage during surge, protecting 12 V logic or analog stages |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in automotive under-hood and industrial control environments |
| Leakage Current IR | <1 µA @ 7.78 V - avoids loading of high-impedance sensor or reference circuits |
| Response Time | <1.0 ps - reacts before most IC input structures can be damaged by ESD events |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Weight: 0.210 g. Molding compound: UL 94V-0 rated. Terminals: matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; identical clamping performance in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching transients without external filtering |
| Moisture Sensitivity Level 1 | Enables direct placement from reel without baking - reduces manufacturing overhead |
| RoHS and halogen-free | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green electronics production |
| Fast response time <1.0 ps | Protects sensitive CMOS inputs against human-body-model (HBM) ESD events per ANSI/IEEE C62.35 |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Transceiver Port |
|---|---|
Use Scenario: 12 V supply line feeding head-unit MCU and display driver ICs exposed to alternator load dump and relay switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamps positive and negative transients to ≤13.4 V, preventing latch-up or gate oxide rupture in downstream LDOs and level shifters. Use Value: Eliminates need for series ferrite beads or RC filters while maintaining <1 µA standby leakage - preserving battery life in always-on modules. |
Use Scenario: Differential data lines (A/B) of RS-485 transceivers connected to factory-floor cabling subject to ESD and induced lightning surges. IC Role / Device Role / Timing Role: Placed across A–B and A–GND/B–GND to clamp common-mode and differential transients before they reach transceiver ESD protection diodes. Use Value: Withstands 12.6 A 10/1000 µs pulses without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Telecom DSL Line Card Protection | Consumer USB-C Power Delivery Interface |
Use Scenario: Tip/ring lines of ADSL/VDSL line cards interfacing with outside plant wiring prone to lightning-induced surges. IC Role / Device Role / Timing Role: Paired as back-to-back devices across line-to-line and line-to-ground to suppress ±1 kV/10/700 µs surges per ITU-T K.21. Use Value: Clamping voltage of 13.4 V ensures protected PHY ICs (e.g., TI TPS2384) remain within absolute maximum ratings during surge events. |
Use Scenario: VBUS line in USB-C receptacles handling up to 20 V PD profiles, exposed to hot-plug ESD and cable coupling transients. IC Role / Device Role / Timing Role: Bidirectional clamping between VBUS and GND limits overvoltage during 15 kV contact ESD (IEC 61000-4-2) and prevents damage to buck-boost controller FETs. Use Value: Sub-1 µA leakage at 7.78 V avoids false undervoltage lockout in PD controllers like STUSB4500 during idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA (Bourns) | 600 W rating, 9.0 V nominal VBR, SMB package (smaller footprint, lower PPK) | Lower surge capacity suits consumer-grade USB or audio ports; not recommended for automotive load dump | Select when board space is constrained and peak surge energy ≤600 W |
| P6SMB9.1CA (ON Semiconductor) | 600 W rating, same VBR range, SMB package, higher IR (5 µA @ VWM) | Higher leakage may affect precision sensor bias networks; suitable for cost-sensitive industrial controls | Choose for legacy BOM continuity where 600 W suffices and SMB footprint is standardized |
Compared with 1.5SMC9.1CA, SMBJ9.0CA and P6SMB9.1CA offer smaller footprints but only 600 W surge capability - making them unsuitable for ISO 7637-2 Pulse 5a (load dump) or high-energy telecom surges where the 1500 W rating and DO-214AB thermal mass of 1.5SMC9.1CA are essential.
Availability
1.5SMC9.1CA is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and telecom DSL line cards requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1.5SMC9.1CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park with ISO 9001 and IATF 16949 certification.
The 1.5SMCxxCA series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under repetitive surge stress and compatibility with lead-free reflow processes.
FAQ
What is the clamping voltage of the 1.5SMC9.1CA under maximum rated surge current?
The 1.5SMC9.1CA has 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 measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 13.4 V during worst-case transient events - critical for safeguarding 12 V logic and analog circuitry. The 1.5SMC9.1CA maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is the 1.5SMC9.1CA suitable for automotive load dump protection per ISO 7637-2?
Yes, the 1.5SMC9.1CA is explicitly validated to meet ISO 7637-2 Pulse 5a (load dump) requirements. Its 1500 W peak pulse power rating, 13.4 V clamping voltage, and −55 °C to +150 °C operating range enable it to absorb the high-energy transients generated by alternator field decay without failure. The 1.5SMC9.1CA's DO-214AB package provides sufficient thermal mass and PCB copper coupling to sustain repeated load dump events - a key requirement for automotive body control modules and infotainment systems.
How does the 1.5SMC9.1CA differ from unidirectional variants like 1.5SMC9.1A?
The 1.5SMC9.1CA is bidirectional, meaning it clamps transients of either polarity identically - ideal for AC-coupled lines or differential buses like RS-485. In contrast, 1.5SMC9.1A is unidirectional and requires correct anode/cathode orientation; it offers slightly lower clamping (13.4 V vs. 13.8 V for 1.5SMC9.1) but cannot protect against reverse-polarity surges. The "CA" suffix denotes bidirectional functionality per TSC's ordering convention, and the 1.5SMC9.1CA has no polarity marking on the DO-214AB body.
What is the maximum leakage current of the 1.5SMC9.1CA at its working stand-off voltage?
The 1.5SMC9.1CA exhibits a maximum blocking leakage current (IR) of 1 µA when biased at its working stand-off voltage of 7.78 V. This ultra-low leakage ensures minimal impact on high-impedance circuits such as sensor bias networks, reference dividers, or battery-monitoring paths. The specification is guaranteed across the full −55 °C to +125 °C operating range and aligns with JESD22-A115 ESD stress immunity requirements.
Does the 1.5SMC9.1CA require special PCB layout considerations for thermal performance?
Yes - to achieve the published RθJA of 50 °C/W, the 1.5SMC9.1CA must be mounted on ≥1 cm² of 1 oz copper connected to inner-layer ground planes via ≥four thermal vias. The DO-214AB package relies on PCB copper for heat dissipation during repetitive surges; inadequate copper area raises junction temperature and risks parametric shift or premature failure. Aetrix recommends using the manufacturer's suggested pad layout with 2.5 mm × 5.5 mm lands and 0.8 mm thermal vias spaced ≤2 mm apart for optimal 1.5SMC9.1CA thermal management.
1.5SMC9.1CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC9.1CA FAQ
1.How can I place an order for 1.5SMC9.1CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CA 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 1.5SMC9.1CA reliable?
The price and inventory of 1.5SMC9.1CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CA?
1.5SMC9.1CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CA 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 1.5SMC9.1CA?
For technical support, including 1.5SMC9.1CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CA requirements.
6.How does Aetrix verify that 1.5SMC9.1CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CA 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 1.5SMC9.1CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CA?
All 1.5SMC9.1CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CA, 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 1.5SMC9.1CA part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CA Tags
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