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Vishay General Semiconductor - Diodes Division SMCJ43CHE3/9AT
- Part No.:
- SMCJ43CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,094
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Product details
Overview
SMCJ43CHE3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ43CHE3/9AT datasheet, SMCJ43CHE3/9AT pinout, SMCJ43CHE3/9AT application, or SMCJ43CHE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), RoHS-compliant HE3 suffix marking, and bi-directional clamping behavior confirmed per ANSI/IEEE C62.35.
Technical Context
The SMCJ43CHE3/9AT operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection against positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable VBR (47.8–52.8 V) and low incremental surge resistance, critical for consistent clamping under repetitive ESD or load-dump events.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 150 °C max junction temperature, and delivers 6.5 W steady-state power dissipation at TA = 50 °C - making it suitable for high-reliability automotive and industrial PCB layouts where thermal management is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working range on protected line. |
| VBR min/max | 47.8 V / 52.8 V - Breakdown voltage range at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to sub-70 V during worst-case transients. |
| PPPM | 1500 W - Peak pulse power handling capability; sustains high-energy surges like ISO 7637-2 Pulse 5a (load dump) without failure. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs heatsinking requirements for sustained power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional device with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient conduction path | Both terminals function identically; conducts avalanche current in either direction when voltage exceeds VBR magnitude. |
| Case (cathode band absent) | Mechanical reference / thermal path | No cathode band marking; case serves as primary thermal interface to PCB copper; requires full-surface soldering to 8 mm × 8 mm pads. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics where field failure risk must be minimized per IATF 16949 requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage (ID ≤ 1.0 µA at VWM) across temperature (-55 °C to +150 °C) and lifetime. |
| MSL Level 1 rating | Permits standard SMT reflow without pre-baking; compatible with high-volume automated assembly using 260 °C peak profile. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability - required for Tier 1 automotive and industrial safety certifications. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V battery-fed control modules against load dump transients (ISO 7637-2 Pulse 5a) and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers to limit input rail excursion to ≤69.4 V. Use Value: Prevents latch-up or permanent damage to 40 V-rated power management ICs during 120 V, 400 ms load dump events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance shunt protector located at connector entry point to divert fast transients before reaching precision DAC or op-amp inputs. Use Value: Maintains signal integrity by clamping <100 ns transients to <70 V while adding <10 pF parasitic capacitance at 1 MHz. |
| Telecom Interface Ports | Consumer Appliance Motor Drivers |
Use Scenario: Safeguarding Ethernet PHY or PoE controller inputs against lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: First-stage TVS in multi-level protection scheme, absorbing bulk energy before secondary GDT or polymer PTC stages. Use Value: Handles 1500 W peak pulse without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth). |
Use Scenario: Suppressing flyback voltage spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Snubber-connected across motor terminals to clamp inductive kickback before it reaches H-bridge MOSFETs. Use Value: Limits drain-source voltage stress to <70 V, preventing avalanche failure in 60 V-rated logic-level MOSFETs during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/52T | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W) | Suitable for space-constrained consumer boards but insufficient for automotive load dump duty cycle | Select only if board area is critical and surge energy remains below 600 W; verify thermal margin at 150 °C ambient. |
| 1.5KE43CA | Through-hole TO-218 package, same VWM/VC specs, higher IFSM (200 A), lower cost | Not suitable for automated SMT lines; requires wave solder or hand assembly | Prefer for prototyping or low-volume industrial controls where manual assembly is acceptable and footprint flexibility exists. |
Compared with SMBJ43CA-E3/52T and 1.5KE43CA, the SMCJ43CHE3/9AT uniquely balances 1500 W surge capacity, AEC-Q101 qualification, and SMT compatibility - making it the optimal choice for volume automotive and industrial designs requiring validated reliability and reflow process alignment.
Availability
SMCJ43CHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom port surge suppression requiring stable component supply across extended product lifecycles.
Supply support for SMCJ43CHE3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - emphasizing AEC-Q101 qualification, stable clamping, and robust thermal performance.
FAQ
What is the clamping voltage of the SMCJ43CHE3/9AT under a 10/1000 µs surge?
The SMCJ43CHE3/9AT clamps to a maximum of 69.4 V when subjected to its rated peak pulse current of 21.6 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees downstream circuit protection within safe voltage margins. The SMCJ43CHE3/9AT maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is the SMCJ43CHE3/9AT suitable for automotive applications?
Yes, the SMCJ43CHE3/9AT carries AEC-Q101 qualification, confirming compliance with stress tests including high-temperature reverse bias, temperature cycling, and ESD. Its 150 °C junction rating, MSL Level 1 reflow compatibility, and HE3 suffix (JESD 201 Class 2 whisker resistance) make it approved for under-hood and chassis-mounted automotive systems. The SMCJ43CHE3/9AT is routinely deployed in engine control units and ADAS sensor modules.
How does the bi-directional design of the SMCJ43CHE3/9AT affect its use in circuit layout?
The SMCJ43CHE3/9AT has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled or floating nodes - such as differential bus lines (CAN, RS-485) or transformer-isolated interfaces - where traditional uni-directional TVS diodes would require careful anode/cathode alignment. The SMCJ43CHE3/9AT reduces assembly errors and supports automated optical inspection.
What is the meaning of the "HE3" and "9AT" suffixes in SMCJ43CHE3/9AT?
The "HE3" suffix denotes AEC-Q101 qualification and RoHS compliance with JESD 201 Class 2 whisker resistance, distinguishing it from commercial-grade "E3" variants. The "9AT" indicates packaging in 13-inch diameter plastic tape and reel, containing 3500 units - optimized for high-speed pick-and-place machines. Both suffixes are integral to the SMCJ43CHE3/9AT ordering identity and reflect its target use in automotive production lines.
Can the SMCJ43CHE3/9AT replace a uni-directional SMCJ43A in an existing design?
No - the SMCJ43CHE3/9AT is bi-directional and lacks a cathode band, whereas the SMCJ43A is uni-directional with defined polarity. Substituting them requires verifying that the protected circuit does not rely on forward conduction (e.g., DC power rail with reverse-polarity protection). In bi-directional signal paths, the SMCJ43CHE3/9AT may be used, but layout review is mandatory. Always validate clamping behavior and thermal performance in situ for the SMCJ43CHE3/9AT.
SMCJ43CHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 19.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43CHE3/9AT FAQ
1.How can I place an order for SMCJ43CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CHE3/9AT 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 SMCJ43CHE3/9AT reliable?
The price and inventory of SMCJ43CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CHE3/9AT?
SMCJ43CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CHE3/9AT 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 SMCJ43CHE3/9AT?
For technical support, including SMCJ43CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ43CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43CHE3/9AT 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 SMCJ43CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43CHE3/9AT?
All SMCJ43CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CHE3/9AT, 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 SMCJ43CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CHE3/9AT Tags
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