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Taiwan Semiconductor Corporation 1.5SMC91C
- Part No.:
- 1.5SMC91C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91C.pdf
- Description:
- 1500W, 91V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,912
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Product details
Overview
1.5SMC91C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for primary-level surge protection on DC power rails and signal lines. It features a 81.9–100 V breakdown voltage (VBR), 73.7 V working stand-off voltage (VWM), 131 V maximum clamping voltage (VC) at 12 A peak pulse current, and <1 µA leakage at rated VWM. It is used in telecom line cards to protect Ethernet PHY interfaces against IEC 61000-4-5 surges.
For engineers reviewing the 1.5SMC91C datasheet, 1.5SMC91C pinout, 1.5SMC91C application, or 1.5SMC91C equivalent, this page delivers verified electrical specs, thermal performance data, bidirectional variant clarification, and real-world ESD/surge immunity context - all specific to the 1.5SMC91C marking code FUJ and C-suffix unidirectional configuration.
Technical Context
The 1.5SMC91C employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps typical) and stable clamping under repetitive 10/1000 µs surge waveforms. Its unidirectional architecture provides asymmetrical conduction: low forward voltage (~3.5 V at 50 A) during fault conditions and high reverse blocking up to 73.7 V.
Thermally, it delivers RθJA = 50 °C/W and RθJC = 15 °C/W, enabling reliable operation up to TJ = 150 °C. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive-switching immunity, and complies with J-STD-020 moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 81.9–100 V - defines minimum and maximum voltage at which device enters avalanche conduction; critical for margining against system overvoltage thresholds |
| VWM | 73.7 V - maximum continuous reverse operating voltage; must exceed normal circuit operating voltage to avoid leakage-induced power loss |
| VC @ IPPM = 12 A | 131 V - clamped voltage during 10/1000 µs surge; determines protected IC's voltage stress during worst-case transients |
| PPK | 1500 W - peak pulse power handling per single 10/1000 µs event; defines robustness against lightning-induced surges (IEC 61000-4-5 Level 4) |
| IR @ VWM | <1 µA - reverse leakage at stand-off voltage; ensures negligible standby current in battery-powered or low-power systems |
| TJ max | +150 °C - maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling |
| Package | DO-214AB (SMC) - surface-mount outline with 7.11 × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT reflow profiles |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Weight ≈ 0.210 g. Meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping |
| Cathode | Protected line connection | Connected to line being protected (e.g., Ethernet TX+); blocks normal operation voltage, conducts only during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - enables clamping before sensitive downstream ICs experience damaging voltage overshoot |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Validated immunity to automotive load-dump (Pulse 5a) and inductive switching (Pulse 1/2a/2b/3a/3b) transients |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing |
| J-STD-020 Level 1 | No floor life limitation - can be stored indefinitely at ≤30 °C/60% RH without baking prior to reflow |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary surge shunt element placed between input terminal and ground, upstream of optocoupler or Schmitt trigger input. Use Value: Limits transient voltage to ≤131 V during 1 kV/500 A IEC 61000-4-5 surge, preventing latch-up or gate oxide damage in input conditioning ICs. |
Use Scenario: Safeguarding LIN bus transceiver power pins against load-dump events in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VCC and ground, clamping supply rail spikes within 1.0 ps. Use Value: Withstands ISO 7637-2 Pulse 5a (75 V/100 ms) without degradation, maintaining transceiver functionality during battery reconnect events. |
| Telecom Ethernet PHY Interface | Smart Meter Power Supply Input |
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY lines from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (e.g., 1.5SMC91C on each differential pair) referenced to chassis ground. Use Value: Clamps 10/1000 µs surges to ≤131 V while maintaining <1 µA leakage at 73.7 V, preserving signal integrity and PHY bias stability. |
Use Scenario: Protecting AC-DC adapter output stage in utility smart meters exposed to grid switching transients. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5 V or 3.3 V rail, absorbing residual surges after MOV and filter stages. Use Value: Handles 1500 W peak pulses without thermal runaway, ensuring meter uptime during ANSI C62.41 Category B/C transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A (Bourns) | 600 W PPK, 90 V VBR min, DO-214AA (SMB) package - lower power, smaller footprint | Not suitable for IEC 61000-4-5 Level 4; limited to Level 2/3 surges | Select when board space is constrained and surge threat level is ≤1 kV line-to-ground |
| 1.5KE91C (Taiwan Semiconductor) | Same VBR/VWM/VC specs but in axial DO-15 package - through-hole, higher RθJA (75 °C/W) | Requires manual assembly or wave soldering; unsuitable for fully automated SMT lines | Choose only for legacy through-hole designs where rework of SMT footprint is impractical |
Compared with SMBJ90A and 1.5KE91C, the 1.5SMC91C uniquely combines 1500 W surge capability, DO-214AB SMT compatibility, and sub-1 µA leakage at 73.7 V - making it optimal for high-reliability, volume-manufactured industrial and automotive PCBs requiring automated placement and robust Level 4 immunity.
Availability
1.5SMC91C is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive BCM power rail hardening, and telecom Ethernet PHY interface safeguarding requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC91C 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, with global distribution and AEC-Q200 qualified product lines.
The 1.5SMCxx series was engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - emphasizing automated manufacturability, ISO 7637-2 compliance, and stable parametric performance across temperature.
FAQ
What does the "C" suffix indicate in 1.5SMC91C?
The "C" suffix in 1.5SMC91C denotes a unidirectional configuration - meaning it functions as a single-polarity TVS diode with anode and cathode terminals, providing reverse-biased clamping only. This differs from "CA" (bidirectional) variants, which suppress surges in both directions without polarity dependence. The 1.5SMC91C uses marking code FUJ and is intended for DC rail protection where polarity is fixed.
Is 1.5SMC91C suitable for protecting RS-485 communication lines?
Yes, 1.5SMC91C is appropriate for RS-485 bus protection when applied differentially across A/B lines referenced to ground, provided system operating voltage remains below its 73.7 V VWM. Its 131 V clamping voltage at 12 A ensures transceivers like MAX1487 or SN65HVD72 remain within safe absolute maximum ratings during IEC 61000-4-5 surges. Layout must minimize trace inductance to preserve <1.0 ps response advantage.
How does 1.5SMC91C compare to 1.5SMC91A?
The 1.5SMC91A has tighter VBR tolerance (86.5–95.5 V vs. 81.9–100 V for 1.5SMC91C), resulting in higher minimum breakdown and slightly elevated VWM (77.8 V). Both share identical PPK (1500 W), VC (125 V for 1.5SMC91A vs. 131 V for 1.5SMC91C), and DO-214AB packaging. Choose 1.5SMC91C for cost-sensitive designs where wider VBR spread is acceptable; select 1.5SMC91A when precise clamping threshold control is required.
Can 1.5SMC91C be used in parallel for higher surge current handling?
No - paralleling multiple 1.5SMC91C units is not recommended due to VBR mismatch (±5% typical), which causes uneven current sharing and premature failure of the lowest-VBR unit. For >12 A peak surge capability, select a higher-rated single device (e.g., 3.0SMC91C) or implement external current-balancing resistors - though this degrades clamping performance and is rarely justified in practice.
Does 1.5SMC91C meet AEC-Q200 qualification for automotive use?
No - while the 1.5SMC91C meets ISO 7637-2 for automotive transients and is widely deployed in BCMs and body electronics, Taiwan Semiconductor does not list it in their AEC-Q200 qualified portfolio. For AEC-Q200-compliant alternatives, consider TSC's AEC-Q200-certified SMCJ90A or SMAJ90A series, which undergo extended stress testing including temperature cycling and board flex.
1.5SMC91C 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
1.5SMC91C FAQ
1.How can I place an order for 1.5SMC91C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91C 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 1.5SMC91C reliable?
The price and inventory of 1.5SMC91C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91C is usually 5 days.
3.What payment methods are accepted for 1.5SMC91C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91C?
1.5SMC91C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91C 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 1.5SMC91C?
For technical support, including 1.5SMC91C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91C requirements.
6.How does Aetrix verify that 1.5SMC91C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91C 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 1.5SMC91C meets industry standards.
7.What is the process for return or replacement of 1.5SMC91C?
All 1.5SMC91C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91C, 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 1.5SMC91C part is unused and in its original packaging.
Return procedure for 1.5SMC91C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91C Tags
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