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Taiwan Semiconductor Corporation SMCJ43CH
- Part No.:
- SMCJ43CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CH.pdf
- Description:
- 1500W, 53.1V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,225
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Product details
Overview
SMCJ43CH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 43V working stand-off voltage (VWM), 47.8–58.4V breakdown voltage (VBR), and 76.7V maximum clamping voltage (VC) at 20A peak pulse current - designed to protect automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ43CH datasheet, SMCJ43CH pinout, SMCJ43CH application, or SMCJ43CH equivalent, this device delivers AEC-Q101 qualification, sub-1ps response time, <1μA reverse leakage above 10V, glass-passivated junction reliability, and bidirectional surge immunity - critical for ESD-hardened CAN/LIN bus interfaces, DC-DC converter inputs, and battery-connected control modules.
Technical Context
The SMCJ43CH operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without requiring external polarity management. Its 1500W peak pulse power rating (tp = 1ms) and 76.7V clamping voltage at 20A ensure robust protection of 48V and 36V automotive subsystems during load dump or inductive switching events.
Thermal performance is defined by 10°C/W junction-to-case (RθJC) and 55°C/W junction-to-ambient (RθJA) resistance, enabling reliable operation up to +150°C junction temperature. The DO-214AB package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system nominal voltage (e.g., 48V rail). |
| VBR min/max | 47.8 V / 58.4 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across process variation. |
| VC @ IPPM | 76.7 V at 20 A - Clamped voltage during worst-case 1ms transient; defines maximum stress imposed on downstream ICs. |
| PPK | 1500 W - Peak pulse power handling per 1ms waveform; supports high-energy transients per ISO 7637-2 Pulse 5a. |
| IR @ VWM | <1 μA - Negligible leakage at rated stand-off voltage; avoids parasitic drain in always-on battery circuits. |
| TJ max | +150 °C - Enables under-hood deployment in automotive engine control units and ADAS power supplies. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 2.5mm lead spacing; compatible with standard reflow profiles. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants only; SMCJ43CH is bidirectional and marked with "GFS" code - no polarity marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no PCB orientation dependency. |
| Case (body) | Non-electrical mechanical interface | Thermally conductive path to PCB copper; requires adequate thermal pad area for RθJA derating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for safety-critical ECUs. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump), and Pulse 3a/3b (capacitive coupling) waveforms - full-system transient immunity. |
| Glass-passivated junction | Stable VBR over lifetime and humidity exposure; eliminates risk of parametric shift in humid environments like engine bays. |
| Sub-1ps response time | Clamps transients before they propagate beyond local decoupling - preserves signal integrity in high-speed analog and digital domains. |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before assembly - simplifies SMT line logistics and reduces handling overhead. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48V DC Power Distribution |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from battery line transients during door lock actuation or lighting load switching. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching sensitive logic. Use Value: Prevents latch-up or permanent damage to 5V/3.3V logic rails while maintaining signal fidelity due to low capacitance and fast response. |
Use Scenario: Safeguarding input stage of isolated DC-DC converters in factory automation PLCs exposed to motor drive noise and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48V primary-side rail, coordinated with upstream fuse and downstream TVS arrays. Use Value: Limits peak voltage to ≤76.7V during 1500W transients, ensuring MOSFET gate oxide integrity and secondary-side regulator survival. |
| Telecom Remote Radio Unit (RRU) Power Input | EV Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Immunity enhancement for outdoor telecom equipment powered via PoE++ or hybrid AC/DC feeds subject to lightning-induced surges. IC Role / Device Role / Timing Role: First-line transient suppression before DC-DC conversion and PMIC sequencing. Use Value: Withstands repeated 1ms pulses up to 20A without degradation, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Protection of 12V auxiliary supply derived from high-voltage battery in electric vehicle onboard chargers during contactor switching or fault isolation. IC Role / Device Role / Timing Role: Bidirectional clamp on isolated 12V output, guarding against reverse-polarity faults and HV coupling events. Use Value: Enables operation across -40°C to +150°C ambient, supporting OBC under-hood mounting without thermal derating penalties. |
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 | Lower peak power rating (600W vs. 1500W); SMB package (smaller footprint, higher RθJA = 85°C/W). | Not suitable for ISO 7637-2 Pulse 5a or sustained load-dump events; limited to consumer-grade 24V systems. | Select SMBJ43CA only when board space is constrained and transient energy is ≤600W - verify clamping margin with actual waveform testing. |
| 1.5KE43CA | Through-hole TO-218 package; same 43V VWM and bidirectional configuration but 1500W rating; slower response (~1ns vs. sub-1ps). | Requires manual or wave soldering; unsuitable for high-density automotive PCBs; higher inductance limits high-frequency ESD suppression. | Choose 1.5KE43CA for legacy through-hole designs or where thermal mass improves long-duration surge handling - avoid in high-speed data lines. |
Compared with SMBJ43CA and 1.5KE43CA, the SMCJ43CH uniquely combines AEC-Q101 qualification, DO-214AB SMT compatibility, sub-1ps response, and 1500W capability - making it the only option validated for modern automotive power domain protection where space, reliability, and waveform fidelity are jointly constrained.
Availability
SMCJ43CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial 48V power distribution, and telecom remote radio unit designs requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 transient immunity.
Supply support for SMCJ43CH 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 manufacturing and AEC-Q101 validation capabilities.
The SMCJ series is part of TSC's automotive-grade transient suppression portfolio, engineered specifically for ISO 7637-2 and IEC 61000-4-5 compliance in harsh environment power systems - emphasizing clamping precision, thermal robustness, and long-term parametric stability.
FAQ
What is the polarity configuration of the SMCJ43CH?
The SMCJ43CH is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMCJ43H), it has no cathode band marking and functions identically regardless of terminal orientation - ideal for AC-coupled or polarity-agnostic protection points such as differential bus lines or floating power rails.
Does the SMCJ43CH meet AEC-Q101 stress test requirements?
Yes, the SMCJ43CH is fully AEC-Q101 qualified, having passed accelerated stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (HBM ≥8kV, CDM ≥1kV). This certification confirms its suitability for automotive powertrain, chassis, and body electronics applications per industry reliability standards.
What is the maximum clamping voltage of the SMCJ43CH under standard test conditions?
The SMCJ43CH exhibits a maximum clamping voltage (VC) of 76.7 V at 20 A peak pulse current (IPPM), measured using the 10/1000 μs waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during worst-case transients and must be compared against downstream IC absolute maximum ratings.
How does the SMCJ43CH differ from the SMCJ43AH variant?
The SMCJ43AH has tighter breakdown voltage tolerance (47.8–52.8 V vs. 47.8–58.4 V for SMCJ43CH) and slightly lower clamping voltage (69.4 V vs. 76.7 V at 22 A). The SMCJ43CH offers broader VBR spread and higher IPPM rating (20 A vs. 22 A), reflecting its optimized trade-off between manufacturing yield and surge robustness in cost-sensitive automotive applications.
Can the SMCJ43CH be used in place of a unidirectional TVS like SMCJ43H?
No - the SMCJ43CH is bidirectional and lacks polarity marking, while the SMCJ43H is unidirectional with a cathode band. Substituting SMCJ43CH for SMCJ43H in DC-only circuits may cause unintended conduction during normal forward bias. Always match polarity configuration to system architecture: use SMCJ43CH only where bidirectional clamping is explicitly required.
SMCJ43CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SMCJ43CH FAQ
1.How can I place an order for SMCJ43CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CH 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 SMCJ43CH reliable?
The price and inventory of SMCJ43CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CH is usually 5 days.
3.What payment methods are accepted for SMCJ43CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CH?
SMCJ43CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CH 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 SMCJ43CH?
For technical support, including SMCJ43CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CH requirements.
6.How does Aetrix verify that SMCJ43CH is sourced from the original manufacturer or authorized distributors?
All SMCJ43CH 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 SMCJ43CH meets industry standards.
7.What is the process for return or replacement of SMCJ43CH?
All SMCJ43CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CH, 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 SMCJ43CH part is unused and in its original packaging.
Return procedure for SMCJ43CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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