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Vishay General Semiconductor - Diodes Division SMCJ43AHE3_A/I
- Part No.:
- SMCJ43AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHE3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,897
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Product details
Overview
SMCJ43AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 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 in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ43AHE3_A/I datasheet, SMCJ43AHE3_A/I pinout, SMCJ43AHE3_A/I application, or SMCJ43AHE3_A/I equivalent, key selection criteria include clamping performance under 21.6 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR range (47.8–52.8 V) and guaranteed VC ≤ 69.4 V at IPPM = 21.6 A, enabling predictable protection of downstream MOSFETs and ICs against ISO 7637-2 and IEC 61000-4-5 transients.
Rated for TJ = –55 °C to +150 °C operation and qualified to AEC-Q101, the SMCJ43AHE3_A/I supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 48 V systems. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed breakdown threshold ensures reliable turn-on during fast transients without premature conduction. |
| VC @ IPPM | 69.4 V at 21.6 A (10/1000 µs) - Clamping voltage limits stress on protected ICs; enables design margin below 75 V absolute maximum ratings. |
| PPPM | 1500 W - Peak surge power handling capability for standardized lightning/surge immunity testing per IEC 61000-4-5. |
| TJ max | +150 °C - Junction temperature limit supporting under-hood automotive environments and high-ambient industrial applications. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm pads; informs derating above 25 °C ambient. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules requiring long-term reliability under temperature cycling, humidity, and mechanical shock. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by a single band on the body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR; polarity-critical for unidirectional operation. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| MSL Level 1 rating | Allows unlimited floor life and reflow soldering at 260 °C peak without baking, simplifying SMT manufacturing flow. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, load dump), improving protection fidelity. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules where failure modes are safety-critical. |
| 1500 W peak pulse power | Supports compliance with ISO 16750-2 (load dump) and IEC 61000-4-5 (surge) test levels up to 4 kV/2 Ω. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 48 V battery rail in vehicle ECUs subjected to ISO 16750-2 load dump transients up to 60 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamping diode placed between input rail and ground, activated within <1 ns upon exceeding VBR. Use Value: Limits voltage seen by downstream DC/DC controllers to ≤69.4 V, preventing latch-up or oxide breakdown in 75 V-rated regulators. |
Use Scenario: Analog output line (0–10 V) from pressure sensor in factory automation PLC, exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-mode protector shunting transient energy away from ADC input and op-amp buffer stages. Use Value: Maintains signal integrity by clamping spikes to <70 V while adding only 1.0 µA leakage at 43 V, avoiding measurement offset. |
| Telecom DC Power Feeder Protection | Consumer Device USB VBUS Surge Guard |
Use Scenario: –48 V DC power feed in telecom base station remote radio units, vulnerable to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input stage, coordinated with upstream fuses and secondary MOVs. Use Value: Absorbs 1500 W surge energy without degradation, enabling single-stage protection architecture and reducing BOM count. |
Use Scenario: VBUS line in portable medical monitor with USB-C charging port, subject to ESD ±15 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after connector to divert ESD current before reaching USB controller IC. Use Value: Sub-ns response and 69.4 V clamping prevent damage to 5 V tolerant USB PHYs while meeting UL 497B surge protector recognition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3_A/I | Lower PPPM (600 W), same VWM/VBR/VC specs, SMB (DO-214AA) package - 30% smaller footprint, higher RθJA (110 °C/W). | Better suited for space-constrained consumer PCBs; less effective for sustained surges due to lower energy rating. | Select when board area is critical and surge duty cycle is light (e.g., ESD-only); avoid for load dump or lightning scenarios. |
| SMCJ43CAHE3_A/I | Bidirectional variant - identical VWM/VBR/VC/PPPM, but symmetric clamping in both polarities; no cathode marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where reverse polarity transients occur. | Choose only if bidirectional protection is mandated; unidirectional SMCJ43AHE3_A/I offers lower cost and simpler layout for DC rails. |
Compared with SMBJ43AHE3_A/I, the SMCJ43AHE3_A/I delivers 2.5× higher surge energy handling and superior thermal dissipation; versus SMCJ43CAHE3_A/I, it provides optimized cost and layout simplicity for unidirectional DC protection without sacrificing clamping performance.
Availability
SMCJ43AHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom DC feeder applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMCJ43AHE3_A/I 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments; engineered for AEC-Q101 compliance and standardized surge immunity testing in automotive, industrial, and infrastructure systems.
FAQ
What is the clamping voltage of the SMCJ43AHE3_A/I at its rated peak pulse current?
The SMCJ43AHE3_A/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 21.6 A using the standard 10/1000 µs waveform. This value is measured under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ43AHE3_A/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMCJ43AHE3_A/I suitable for automotive applications?
Yes, the SMCJ43AHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant and automotive-grade construction. It meets requirements for temperature cycling, humidity resistance, and mechanical shock relevant to engine control units, body electronics, and ADAS modules. The SMCJ43AHE3_A/I is validated for operation from –55 °C to +150 °C and supports ISO 16750-2 load dump immunity in 48 V systems.
How does the SMCJ43AHE3_A/I differ from the bidirectional SMCJ43CAHE3_A/I?
The SMCJ43AHE3_A/I is unidirectional with a cathode band marking and conducts only in reverse bias above VBR, while the SMCJ43CAHE3_A/I is bidirectional - clamping symmetrically in both polarities with no polarity marking. Both share identical VWM (43 V), VBR (47.8–52.8 V), VC (69.4 V), and PPPM (1500 W), but the SMCJ43AHE3_A/I is preferred for DC power rail protection where polarity is fixed, offering lower cost and simplified layout versus the bidirectional variant.
What is the thermal resistance of the SMCJ43AHE3_A/I, and how does it affect layout?
The SMCJ43AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value directly impacts power derating: at 75 °C ambient, its 6.5 W steady-state power dissipation must be reduced to ~4.3 W to maintain TJ ≤ 150 °C. Layout must replicate the specified pad dimensions and avoid thermal isolation to ensure accurate thermal performance. The SMCJ43AHE3_A/I's RθJL of 15 °C/W further supports heat transfer through leads to internal ground planes.
Does the SMCJ43AHE3_A/I require special handling during PCB assembly?
No special handling beyond standard SMT practices is required for the SMCJ43AHE3_A/I. It is rated MSL Level 1 per J-STD-020, permitting unlimited floor life and reflow soldering at a peak temperature of 260 °C without pre-baking. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and whisker resistance meets JESD 201 Class 2. The SMCJ43AHE3_A/I is fully compatible with automated pick-and-place and lead-free reflow profiles used in high-volume automotive and industrial manufacturing.
SMCJ43AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SMCJ43AHE3_A/I FAQ
1.How can I place an order for SMCJ43AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHE3_A/I 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 SMCJ43AHE3_A/I reliable?
The price and inventory of SMCJ43AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ43AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHE3_A/I?
SMCJ43AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHE3_A/I 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 SMCJ43AHE3_A/I?
For technical support, including SMCJ43AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ43AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHE3_A/I 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 SMCJ43AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ43AHE3_A/I?
All SMCJ43AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHE3_A/I, 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 SMCJ43AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ43AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHE3_A/I Tags
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