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Taiwan Semiconductor Corporation 1.5SMC9.1CH
- Part No.:
- 1.5SMC9.1CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CH.pdf
- Description:
- 1500W, 9.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,521
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Product details
Overview
1.5SMC9.1CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 9.1V breakdown voltage (VBR = 8.19–10.0 V), 1500 W peak pulse power rating (10/1000 µs), clamping voltage of 13.8 V at 50 A, and DO-214AB (SMC) package - ideal for automotive infotainment power inputs and industrial I/O interfaces.
For engineers reviewing the 1.5SMC9.1CH datasheet, 1.5SMC9.1CH pinout, 1.5SMC9.1CH application, or 1.5SMC9.1CH equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, <1 µA leakage at 7.37 V, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ), then avalanches rapidly when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5% for 1.5SMC9.1CH) and low temperature coefficient (0.068 %/°C).
The device is explicitly rated for bidirectional use (denoted by "CH" suffix), with identical electrical characteristics in both polarities - enabling single-component protection of AC-coupled or floating signal paths without polarity concerns. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 8.19 V / 10.0 V - defines precise avalanche onset window for reliable overvoltage triggering |
| VWM | 7.37 V - maximum continuous operating voltage before leakage rises above 1 µA |
| VC @ IPPM | 13.8 V at 50 A - clamping voltage limits downstream IC stress during 10/1000 µs transients |
| PPK | 1500 W - peak surge energy absorption capacity per single non-repetitive event |
| IR @ VWM | <1 µA - negligible standby current draw on protected 5–7 V supply rails |
| TJ max | +150 °C - supports operation in under-hood automotive environments and sealed industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.3 mm height |
Pinout & Package
Package: DO-214AB (SMC), bidirectional configuration - no anode/cathode distinction; symmetrical terminals marked only by cathode band (omitted in CH variants per datasheet Note 4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Terminal | Connects to line under protection; identical function in either direction |
| Terminal 2 | Bidirectional Surge Terminal | Connects to reference plane (GND or return); interchangeable with Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ignition noise) waveforms |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry can be damaged - critical for USB, CAN, and sensor interfaces |
| Glass passivated junction | Ensures long-term parameter stability and reduced parameter drift across temperature and lifetime |
| Moisture sensitivity level 1 | No baking required prior to reflow; compatible with standard SMT assembly processes without moisture-related popcorning risk |
Applications
| Automotive Infotainment Power Input | Industrial RS-485 Data Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed head unit power rail exposed to load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional shunt clamp that diverts >100 V spikes away from DC-DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to PMICs and SoCs during ISO 7637-2 Pulse 5a events up to 35 V/100 ms. |
Use Scenario: Two-wire differential bus in factory automation PLCs subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Symmetrical voltage limiter placed across A/B lines to maintain common-mode integrity during fast transients. Use Value: Maintains signal fidelity by clamping common-mode surges to ≤13.8 V while preserving RS-485 receiver input thresholds. |
| Consumer Audio Amplifier Speaker Outputs | Smart Meter AC Mains Interface |
|
Use Scenario: BTL amplifier outputs driving 4–8 Ω speakers, vulnerable to electrostatic discharge from user contact. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp between output terminals and ground to absorb ±8 kV HBM ESD events. Use Value: Eliminates audible pop/click and prevents op-amp output stage failure without adding series impedance or signal distortion. |
Use Scenario: Isolated power supply input stage in utility meters connected to 230 VAC mains with lightning-induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS placed after MOV but before rectifier bridge to limit let-through voltage to downstream SMPS controller. Use Value: Reduces peak voltage seen by primary-side controller IC from >1.5 kV to <14 V, enabling use of lower-voltage-rated MOSFETs and gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Same DO-214AA (SMB) package; 9.0 V nominal VBR, 600 W PPK, higher VC = 15.4 V @ 38.9 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current load dump | Select when board space is constrained and surge energy is ≤600 W - not a drop-in replacement for 1.5SMC9.1CH's 1500 W rating |
| 1.5KE9.1CA | Through-hole DO-15 package; same 9.1 V VBR, 1500 W rating, but slower response (~1 ns) and higher VC = 14.5 V @ 103 A | Requires PCB through-hole real estate and lacks AEC-Q101 qualification | Use only in non-automotive, cost-sensitive industrial designs where SMT assembly is unavailable |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CH delivers superior surge handling in a compact SMT package with automotive-grade reliability - making it the preferred choice for space-constrained, high-reliability DC power and data line protection.
Availability
1.5SMC9.1CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and smart meter AC interface circuits requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC9.1CH 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, and rectifiers - with global distribution and AEC-Q101 validation capabilities.
The 1.5SMCxxCH series was developed specifically for high-reliability bidirectional surge suppression in automotive and industrial environments, emphasizing fast response, low clamping, and process-controlled VBR consistency.
FAQ
What does the "CH" suffix mean in 1.5SMC9.1CH?
The "CH" suffix denotes a bidirectional configuration - meaning the 1.5SMC9.1CH provides symmetrical clamping in both polarities, with identical VBR, VC, and IPPM specifications regardless of voltage polarity. This eliminates the need for polarity-aware layout and enables protection of AC-coupled or floating nodes without external diode pairing.
Is 1.5SMC9.1CH AEC-Q101 qualified?
Yes, the 1.5SMC9.1CH is explicitly AEC-Q101 qualified per the manufacturer's documentation (Version B2207). It has undergone stress testing including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model ESD (HBM), confirming suitability for automotive electronic modules.
What is the clamping voltage of 1.5SMC9.1CH and how is it measured?
The 1.5SMC9.1CH has a maximum clamping voltage (VC) of 13.8 V at 50 A peak pulse current (IPPM), tested using the standardized 10/1000 µs double-exponential waveform per Fig.5 in the datasheet. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can 1.5SMC9.1CH replace unidirectional 1.5SMC9.1H in existing designs?
No - the 1.5SMC9.1CH is bidirectional and lacks a defined cathode marking, whereas the 1.5SMC9.1H is unidirectional with explicit polarity. Substituting 1.5SMC9.1CH for 1.5SMC9.1H may cause incorrect clamping behavior in DC-biased circuits. Layout and schematic review is required before interchange.
What is the maximum working stand-off voltage (VWM) for 1.5SMC9.1CH?
The maximum working stand-off voltage (VWM) for 1.5SMC9.1CH is 7.37 V at 25°C, verified per the electrical specifications table. This is the highest continuous DC or RMS voltage the device can withstand without exceeding 1 µA leakage current - critical for selecting compatible supply rails.
1.5SMC9.1CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 114A
- 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)
1.5SMC9.1CH FAQ
1.How can I place an order for 1.5SMC9.1CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CH 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 1.5SMC9.1CH reliable?
The price and inventory of 1.5SMC9.1CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CH?
1.5SMC9.1CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CH 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 1.5SMC9.1CH?
For technical support, including 1.5SMC9.1CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CH requirements.
6.How does Aetrix verify that 1.5SMC9.1CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CH 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 1.5SMC9.1CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CH?
All 1.5SMC9.1CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CH, 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 1.5SMC9.1CH part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CH Tags
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