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Taiwan Semiconductor Corporation 1.5SMC91CAH
- Part No.:
- 1.5SMC91CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,453
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Product details
Overview
1.5SMC91CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 86.5–95.5 V at 1 mA, clamping voltage 125 V at 12.6 A peak pulse current, and working stand-off voltage 77.8 V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients and ESD.
For engineers reviewing the 1.5SMC91CAH datasheet, 1.5SMC91CAH pinout, 1.5SMC91CAH application, or 1.5SMC91CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W peak pulse power rating, low leakage (<1 µA at 77.8 V), and compliance with automotive surge immunity standards.
Technical Context
The 1.5SMC91CAH is a glass-passivated, bipolar junction TVS diode designed for unidirectional or bidirectional transient suppression without polarity dependence. Its symmetrical breakdown behavior (VBR = 86.5–95.5 V in both directions) enables direct placement across AC lines or differential signal pairs.
It delivers sub-1 ps response time and thermal performance characterized by RθJA = 50 °C/W and RθJC = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature with moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 86.5 V / 95.5 V at 1 mA - defines reliable conduction onset under reverse/forward surge conditions |
| VWM | 77.8 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | 125 V at 12.6 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - peak transient power handling capacity per single 1 ms pulse |
| IR @ VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - supports under-hood automotive and industrial environments without derating |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline enabling automated assembly and 0.21 g mass |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not functional for bidirectional 1.5SMC91CAH); meets UL 94V-0 and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | No polarity marking required; terminals interchangeable for AC or differential line protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal and humidity stress |
| Fast response time | <1 ps typical - limits voltage overshoot before clamping engages during ESD or lightning-induced surges |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Distribution | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and ground to clamp surges up to 1500 W. Use Value: Prevents damage to microcontrollers and sensors by limiting clamped voltage to 125 V during ISO 7637-2 Pulse 5a events. | Use Scenario: Transient suppression on CAN_H and CAN_L lines in factory automation nodes. IC Role / Device Role / Timing Role: Differential-mode TVS pair suppressing common-mode surges while preserving signal integrity. Use Value: Maintains CAN FD communication up to 5 Mbps by limiting capacitance and ensuring <1 µA leakage at 77.8 V. |
| Telecom AC-DC Adapter Input | Smart Meter Power Supply |
Use Scenario: Surge protection at AC input stage of wall-mounted broadband modems. IC Role / Device Role / Timing Role: Primary-line TVS absorbing 10/1000 µs lightning surges per IEC 61000-4-5 Level 3. Use Value: Enables compliance with EN 61000-4-5 by clamping 12.6 A pulses to ≤125 V without degradation after repeated strikes. | Use Scenario: Overvoltage protection on 220 VAC meter front-end rectifier inputs. IC Role / Device Role / Timing Role: Bidirectional suppressor guarding bridge rectifier against grid switching transients. Use Value: Survives 100,000+ surge cycles due to glass-passivated junction and 150 °C TJ rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | 600 W peak power, SMB package (smaller footprint), VC = 129 V @ 9.3 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy does not exceed 600 W |
| 1.5KE91CA | Through-hole DO-201 package, same 1500 W rating but higher RθJA (75 °C/W), slower automated assembly | Not suitable for high-density SMT production; requires wave solder or hand assembly | Select only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAH uniquely combines 1500 W SMT capability, AEC-Q101 qualification, and ISO 7637-2 compliance in a DO-214AB outline-enabling automotive-grade surge protection without layout or process compromise.
Availability
1.5SMC91CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial CAN bus interface, telecom AC-DC adapter input, and smart meter power supply applications requiring stable component supply and full traceability.
Supply support for 1.5SMC91CAH 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, serving global automotive, industrial, and consumer markets since 1979.
The 1.5SMCxxCAH series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh automotive and industrial environments with emphasis on surge reliability and SMT manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC91CAH under standard 10/1000 µs surge conditions?
The 1.5SMC91CAH has a maximum clamping voltage (VC) of 125 V at 12.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform defined in IEC 61000-4-5. This value is measured at TA = 25 °C and ensures downstream circuitry remains within safe operating limits during surge events.
Is the 1.5SMC91CAH suitable for bidirectional signal line protection?
Yes, the 1.5SMC91CAH is explicitly designed for bidirectional operation, with identical breakdown voltage (86.5–95.5 V) and clamping behavior in both polarities. Its CAH suffix denotes bidirectional configuration, making it appropriate for AC mains, differential data lines like RS-485 or CAN, and other non-polarized surge paths.
Does the 1.5SMC91CAH meet AEC-Q101 reliability requirements?
Yes, the 1.5SMC91CAH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD) per the AEC-Q101-004 standard. This certification confirms its suitability for automotive electronic control units and under-hood applications.
What is the maximum steady-state power dissipation for the 1.5SMC91CAH?
The 1.5SMC91CAH has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25 °C. This value applies only to continuous DC or low-frequency AC conditions-not transient events-and must be derated linearly above 25 °C using the specified RθJA = 50 °C/W thermal resistance.
How does the 1.5SMC91CAH differ from the unidirectional 1.5SMC91CH variant?
The 1.5SMC91CAH is bidirectional with symmetrical electrical characteristics in both directions, while the 1.5SMC91CH is unidirectional and features a cathode band marking. The CAH version supports AC or differential applications without polarity constraints; the CH version requires correct orientation and exhibits forward voltage drop (~3.5 V at 50 A) in one direction only.
1.5SMC91CAH 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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)
1.5SMC91CAH FAQ
1.How can I place an order for 1.5SMC91CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAH 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 1.5SMC91CAH reliable?
The price and inventory of 1.5SMC91CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAH?
1.5SMC91CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAH 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 1.5SMC91CAH?
For technical support, including 1.5SMC91CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAH requirements.
6.How does Aetrix verify that 1.5SMC91CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAH 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 1.5SMC91CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAH?
All 1.5SMC91CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAH, 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 1.5SMC91CAH part is unused and in its original packaging.
Return procedure for 1.5SMC91CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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