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Taiwan Semiconductor Corporation 1.5SMC91CH
- Part No.:
- 1.5SMC91CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CH.pdf
- Description:
- 1500W, 91V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,195
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Product details
Overview
1.5SMC91CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 91V breakdown voltage (min 81.9V, max 100V), and clamps to ≤131V at 12A peak impulse current. It provides ESD and surge protection for automotive infotainment power rails and industrial I/O interfaces.
For engineers reviewing the 1.5SMC91CH datasheet, 1.5SMC91CH pinout, 1.5SMC91CH application, or 1.5SMC91CH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA leakage above 10V, and bidirectional clamping symmetry critical for ungrounded signal lines.
Technical Context
This TVS operates as a voltage-clamped shunt protector with symmetrical avalanche breakdown in both polarities due to its CH suffix designation - enabling robust protection of floating or AC-coupled data lines without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±10% typical) and low temperature coefficient (0.106%/°C).
Designed for high-energy transients, it sustains 1500W peak pulse power per 10/1000μs waveform (per Fig.5), with thermal resistance RθJA = 50°C/W and RθJC = 15°C/W, supporting operation from –55°C to +150°C junction temperature under sustained surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 81.9V min / 100V max - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 73.7V - maximum continuous working voltage before leakage exceeds 1μA; sets safe operating margin below VBR |
| VC @ IPPM = 12A | ≤131V - clamped voltage during 10/1000μs surge; determines protected circuit's maximum stress level |
| PPK | 1500W - peak pulse power handling per single 1ms transient; enables immunity to lightning-induced surges |
| IR @ VWM | ≤1μA - ultra-low leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ Range | –55°C to +150°C - supports under-hood automotive and industrial environments without derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Weight: 0.210g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; either terminal serves as input or return path for transient energy |
| Case (exposed metal slug) | Thermal conduction path | Provides low-RθJC = 15°C/W path to PCB copper for sustained power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - eliminates need for additional qualification effort |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) waveforms - covers full vehicle electrical disturbance profile |
| Fast response time <1ps | Clamps before transient propagates into protected IC - preserves signal integrity in high-speed interfaces |
| Glass passivated junction | Ensures stable VBR across temperature and lifetime - reduces field failure risk in harsh environments |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - simplifies SMT assembly and reduces manufacturing cost |
Applications
| Automotive Infotainment Power Rails | Industrial RS-485 Data Lines |
|---|---|
Use Scenario: Protecting 12V supply inputs to head unit MCUs and display drivers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping TVS absorbing up to 1500W surge energy while limiting rail voltage to ≤131V. Use Value: Prevents latch-up or permanent damage to downstream DC-DC converters and PMICs during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding differential RS-485 transceivers connected to long cable runs exposed to ESD and induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across A/B bus lines to limit common-mode transients. Use Value: Maintains signal integrity by clamping to ≤131V without polarity bias - avoids false triggering in half-duplex communication. |
| Telecom PoE PSE Interface | Medical Patient Monitoring Sensors |
Use Scenario: Protecting Power Sourcing Equipment (PSE) controller ICs on 48V Ethernet ports from hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC feed line upstream of PD detection circuitry. Use Value: Enables reliable Class 4–5 PoE operation by suppressing >1kV transients within 1ps - prevents false PD classification. | Use Scenario: Shielding analog front-end amplifiers in wearable ECG/SpO₂ sensors from electrostatic discharge during patient contact. IC Role / Device Role / Timing Role: Low-leakage (≤1μA) bidirectional clamp on sensor input traces to preserve DC accuracy. Use Value: Guarantees baseline stability and SNR integrity while meeting IEC 61000-4-2 Level 4 (15kV air) ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | 600W rating, SMB package (smaller footprint), VC = 129V @ 9.5A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy does not exceed 600W |
| 1.5KE91CA | Through-hole TO-204AA (DO-41), same 1500W rating but slower thermal response | Not suitable for automated SMT lines; requires wave solder or hand assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CH uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full ISO 7637-2 compliance - making it the only option qualified for production automotive electronics requiring automated placement and high-reliability surge immunity.
Availability
1.5SMC91CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, telecom PoE infrastructure, and medical sensor modules requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC91CH 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-Q101-certified production lines.
The 1.5SMCxxCH series is part of TSC's automotive-grade transient suppression portfolio, engineered specifically to meet stringent ISO 7637-2 and AEC-Q101 requirements for modern vehicle ECUs and industrial control systems.
FAQ
What is the breakdown voltage range for 1.5SMC91CH?
The 1.5SMC91CH has a specified breakdown voltage VBR of 81.9V minimum to 100V maximum at IT = 1mA, measured per ANSI/IEEE C62.35. This ±10% tolerance ensures consistent clamping behavior across production lots and temperature ranges, directly supporting design margin calculations for protected circuits.
Is 1.5SMC91CH unidirectional or bidirectional?
The "CH" suffix in 1.5SMC91CH explicitly denotes a bidirectional configuration. Unlike "H"-suffixed unidirectional variants, the 1.5SMC91CH features symmetrical avalanche characteristics in both polarities - confirmed by identical VBR, VC, and IPPM values regardless of voltage polarity applied.
Does 1.5SMC91CH meet automotive qualification standards?
Yes, 1.5SMC91CH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. These certifications are documented in Taiwan Semiconductor's official B2207 datasheet revision and verified through third-party lab reports per automotive component validation protocols.
What is the maximum clamping voltage of 1.5SMC91CH under surge conditions?
The 1.5SMC91CH clamps to a maximum of 131V at 12A peak impulse current (IPPM) under the standard 10/1000μs waveform. This value is guaranteed across –55°C to +150°C and defines the absolute upper voltage stress imposed on downstream components during transient events.
Can 1.5SMC91CH be used in place of unidirectional 1.5SMC91H?
No - the 1.5SMC91CH is electrically and mechanically distinct from the unidirectional 1.5SMC91H. While both share the same package and power rating, the 1.5SMC91CH lacks a cathode band and exhibits symmetrical breakdown, whereas 1.5SMC91H requires correct polarity orientation and clamps only in reverse bias. Substitution would compromise protection in AC or floating circuits.
1.5SMC91CH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC91CH FAQ
1.How can I place an order for 1.5SMC91CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CH 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 1.5SMC91CH reliable?
The price and inventory of 1.5SMC91CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CH?
1.5SMC91CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CH 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 1.5SMC91CH?
For technical support, including 1.5SMC91CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CH requirements.
6.How does Aetrix verify that 1.5SMC91CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CH 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 1.5SMC91CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CH?
All 1.5SMC91CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CH, 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 1.5SMC91CH part is unused and in its original packaging.
Return procedure for 1.5SMC91CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CH Tags
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