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Taiwan Semiconductor Corporation 1.5SMC43CAH
- Part No.:
- 1.5SMC43CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAH.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,979
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Product details
Overview
1.5SMC43CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 40.9V–45.2V breakdown voltage (VBR), 36.8V working stand-off voltage (VWM), and 59.3V maximum clamping voltage (VC) at 26A peak impulse current - designed for ESD and surge protection in automotive power-line interfaces.
For engineers reviewing the 1.5SMC43CAH datasheet, 1.5SMC43CAH pinout, 1.5SMC43CAH application, or 1.5SMC43CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, and 1μA max leakage above 10V.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to deliver symmetrical clamping in both polarities, enabling robust protection against reverse-polarity transients and bipolar surges without external polarity management. Its thermal design supports 150°C junction operation with RθJA = 50°C/W and RθJC = 15°C/W.
The device meets automotive-grade reliability requirements including JESD201 Class 2 whisker resistance, moisture sensitivity level 1 (J-STD-020), and halogen-free construction per IEC 61249-2-21 - confirming suitability for under-hood and infotainment power rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9V / 45.2V - ensures reliable triggering above system nominal voltage while avoiding false trips during normal operation |
| VWM | 36.8V - defines maximum continuous DC or RMS operating voltage before leakage exceeds 1μA |
| VC @ IPPM | 59.3V at 26A - limits downstream voltage stress during 10/1000μs surge events per REA standard |
| PPK | 1500W - sustains high-energy transients such as load dump or inductive switching spikes |
| IR @ VWM | <1μA - minimizes standby power loss and avoids interference with high-impedance sensing circuits |
| TJ max | +150°C - enables deployment in engine control units and other high-ambient-temperature environments |
| Response time | <1.0ps - provides near-instantaneous clamping to protect fast-edge digital interfaces and analog front-ends |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (reversible) | Bidirectional surge path | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity |
| Case (body) | Thermal and mechanical interface | DO-214AB outline provides 0.210g mass and UL 94V-0 molding compound for flame resistance |
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 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| Fast response <1.0ps | Clamps before transient energy couples into protected ICs - critical for CAN FD, LIN, and sensor signal integrity |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes without floor-life constraints |
Applications
| Automotive Power Distribution | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protection of 12V/24V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDO regulators. Use Value: Limits input voltage to ≤59.3V during 1500W surges, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Surge suppression on CAN_H/CAN_L lines in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional shunt protector absorbing common-mode and differential transients per ISO 11898-2. Use Value: Maintains signal integrity by clamping transients within 1ps while adding <1pF junction capacitance at 0V bias. |
| Telecom PoE Injector Port | Consumer USB-C Power Delivery |
Use Scenario: Input-stage protection of IEEE 802.3bt-compliant PoE++ injectors handling up to 90W. IC Role / Device Role / Timing Role: Front-end TVS across primary DC input rails before active OR-ing FETs and PD controllers. Use Value: Absorbs 10/1000μs surges up to 26A without degradation, preserving injector uptime during lightning-induced line surges. |
Use Scenario: Overvoltage safeguard on VBUS line of USB-C receptacles supporting 20V/5A PD profiles. IC Role / Device Role / Timing Role: Secondary-level clamping after primary fuse and EMI filter, guarding Type-C controller and port power switches. Use Value: Clamps VBUS to ≤59.3V during hot-plug ESD events, preventing latch-up in USB PD policy engines and voltage monitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | 600W rating, SMB package (smaller footprint), VC = 69.4V @ 8.7A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and peak surge energy remains below 600W |
| 1.5KE43CA | Through-hole DO-201 package, same 1500W rating, VC = 69.4V @ 21.7A | Not AEC-Q101 qualified; lacks automotive thermal and mechanical reliability validation | Prefer for industrial non-automotive designs where reflow compatibility is not required |
Compared with 1.5SMC43CAH, SMBJ43CA offers smaller size but reduced surge capacity and higher clamping voltage, while 1.5KE43CA matches power rating but lacks AEC-Q101 qualification and surface-mount process compatibility - making 1.5SMC43CAH the optimal choice for automotive SMT production requiring ISO 7637-2 and thermal robustness.
Availability
1.5SMC43CAH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial CAN bus hardening, and telecom PoE injector designs requiring stable component supply, AEC-Q101 assurance, and DO-214AB packaging.
Supply support for 1.5SMC43CAH 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 1.5SMCxxCAH series was developed specifically for automotive and industrial transient suppression, emphasizing high-power SMT reliability, low clamping voltage, and full ISO 7637-2 waveform coverage.
FAQ
What is the clamping voltage of the 1.5SMC43CAH under a 10/1000μs surge?
The 1.5SMC43CAH has a maximum clamping voltage (VC) of 59.3V when subjected to a 10/1000μs surge waveform at its rated peak pulse current of 26A. This value is measured per REA-defined test conditions and ensures downstream circuitry remains within safe operating voltage limits during standardized transients.
Is the 1.5SMC43CAH suitable for automotive applications requiring AEC-Q101 certification?
Yes, the 1.5SMC43CAH is explicitly AEC-Q101 qualified and tested for automotive use, including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) per JESD22-A114. It is approved for placement in engine control modules, body control units, and ADAS power supplies.
How does the 1.5SMC43CAH differ from unidirectional variants like 1.5SMC43CH?
The 1.5SMC43CAH is bidirectional and provides symmetrical clamping in both polarities, whereas 1.5SMC43CH is unidirectional and requires correct orientation relative to circuit polarity. The CAH version eliminates polarity-dependent layout constraints and supports AC-coupled or floating-bus protection schemes without additional diodes.
What is the maximum leakage current of the 1.5SMC43CAH at its working stand-off voltage?
At its working stand-off voltage (VWM) of 36.8V, the 1.5SMC43CAH exhibits a maximum blocking leakage current (IR) of 1μA at 25°C. This ultra-low leakage preserves efficiency in always-on systems and avoids false triggering in high-impedance monitoring circuits.
Does the 1.5SMC43CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
No - the 1.5SMC43CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which demands ≥450V clamping capability and higher energy absorption. For Pulse 5a, higher-voltage TVS arrays or hybrid protection solutions are required alongside the 1.5SMC43CAH.
1.5SMC43CAH 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
1.5SMC43CAH FAQ
1.How can I place an order for 1.5SMC43CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAH 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 1.5SMC43CAH reliable?
The price and inventory of 1.5SMC43CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAH?
1.5SMC43CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAH 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 1.5SMC43CAH?
For technical support, including 1.5SMC43CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAH requirements.
6.How does Aetrix verify that 1.5SMC43CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAH 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 1.5SMC43CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAH?
All 1.5SMC43CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAH, 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 1.5SMC43CAH part is unused and in its original packaging.
Return procedure for 1.5SMC43CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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