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Vishay General Semiconductor - Diodes Division SMAJ43CHE3/61
- Part No.:
- SMAJ43CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CHE3/61.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,710
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Product details
Overview
SMAJ43CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping ESD and surge transients on signal/power lines. It features 43 V stand-off voltage (VWM), 76.7 V maximum clamping voltage (VC) at 5.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface protection per AEC-Q101.
For engineers reviewing the SMAJ43CHE3/61 datasheet, SMAJ43CHE3/61 pinout, SMAJ43CHE3/61 application, or SMAJ43CHE3/61 equivalent, this device serves as a high-reliability, RoHS-compliant TVS for bidirectional overvoltage protection in automotive-grade embedded systems where low leakage (<1 µA at VWM), fast response, and MSL Level 1 solderability are required.
Technical Context
This bi-directional TVS operates symmetrically in both polarities with identical breakdown (47.8–58.4 V), clamping (76.7 V), and leakage (<1 µA) characteristics. Its glass-passivated junction ensures stable performance across -55 °C to +150 °C operating temperature range and supports repetitive surge events at 0.01% duty cycle.
The device uses a planar silicon avalanche structure optimized for low incremental surge resistance and fast response time (<1 ns). It meets J-STD-020 MSL Level 1, withstands 260 °C solder dip for 40 s, and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and "high reliability/automotive grade" designation in Vishay documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36–42 V nominal systems. |
| VC @ IPPM | 76.7 V - Clamped voltage at 5.2 A peak pulse current; limits downstream IC stress during 10/1000 µs surges. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); enables robust protection against IEC 61000-4-5 Level 3/4 surges. |
| IPPM | 5.2 A - Peak pulse current capability at VC; determines minimum trace width and PCB layout margin for surge path. |
| ID @ VWM | <1 µA - Reverse leakage at 43 V; ensures negligible standby power loss and signal integrity in high-impedance circuits. |
| TJ Range | -55 °C to +150 °C - Full automotive temperature range support; validated for under-hood and ADAS module deployment. |
| Package | DO-214AC (SMA) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AC (SMA) package: two-terminal, bi-directional device with no polarity marking; symmetrical construction means either terminal functions identically as anode or cathode depending on applied voltage polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal conducts when reverse-biased beyond VBR; no fixed polarity - used interchangeably in AC or differential signal paths. |
| Terminal 2 | Anode/Cathode (bidirectional) | Identical role to Terminal 1; enables placement without orientation check during SMT assembly and simplifies PCB routing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity, and mechanical shock - eliminates need for additional qualification testing. |
| Bi-directional symmetry | Identical VBR, VC, and IPPM in both directions - protects AC-coupled lines (e.g., CAN, LIN, sensor bridges) without polarity constraints. |
| MSL Level 1 rating | Zero floor life limitation; can be stored indefinitely before reflow - reduces inventory management overhead and moisture-sensitive handling costs. |
| Glass-passivated junction | Enhanced long-term stability and reduced parameter drift under thermal stress - critical for 15-year automotive service life requirements. |
| RoHS & WEEE compliant | Lead-free matte tin plating (J-STD-002/JESD22-B102) and halogen-free molding compound - meets global environmental compliance mandates. |
Applications
| Automotive Sensor Interface | CAN Bus Transient Protection |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure, temperature, or position sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤76.7 V while maintaining <1 µA leakage - preserves measurement accuracy and prevents ADC saturation or latch-up. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) in body control modules. IC Role / Device Role / Timing Role: Low-capacitance TVS connected line-to-line and line-to-ground to absorb common-mode and differential transients. Use Value: Clamps surges within <1 ns while adding <1 pF capacitance - avoids CAN bit timing distortion and maintains >1 Mbps data integrity. |
| Industrial PLC Analog Input | Telecom Line Card Surge Suppression |
|
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field-induced lightning surges and inductive switching spikes. IC Role / Device Role / Timing Role: Primary front-end TVS mounted directly at connector entry point, upstream of signal conditioning circuitry. Use Value: Withstands 400 W pulses without degradation and operates up to +150 °C - ensures uptime in uncooled cabinet environments. |
Use Scenario: Protecting Ethernet PHY interfaces and POTS line drivers in telecom access equipment from induced surges on outdoor copper lines. IC Role / Device Role / Timing Role: Bi-directional TVS deployed in series with common-mode chokes to suppress longitudinal and transverse mode transients. Use Value: Matches 43 V system isolation rating and delivers consistent clamping across production lots - reduces field failure root cause analysis effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA-E3/61 | Same VWM (43 V), VC (76.7 V), and DO-214AC package; differs only in suffix - CA denotes bi-directional commercial grade (non-AEC-Q101). | Not qualified for automotive use; lacks AEC-Q101 test reports and high-reliability process controls. | Select SMAJ43CA-E3/61 only for cost-sensitive industrial or consumer designs where automotive qualification is unnecessary. |
| SMAJ43AHE3/61 | Uni-directional variant with same VWM (43 V) but lower VC (69.4 V) and higher IPPM (5.8 A); identical AEC-Q101 qualification and HE3 suffix. | Requires correct polarity placement; unsuitable for AC or differential signals without external rectification or biasing. | Choose SMAJ43AHE3/61 only when protecting DC power rails or unidirectional signal paths where tighter clamping is prioritized over polarity flexibility. |
Compared with SMAJ43CHE3/61, SMAJ43CA-E3/61 offers identical electrical specs but no automotive qualification, while SMAJ43AHE3/61 trades bi-directionality for lower clamping voltage - making SMAJ43CHE3/61 the sole choice for AEC-Q101-compliant, polarity-agnostic surge protection.
Availability
SMAJ43CHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for SMAJ43CHE3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMAJ series was developed specifically for high-reliability transient suppression in harsh environments, targeting AEC-Q101 compliance and seamless integration into automotive ECUs, ADAS sensors, and industrial control hardware.
FAQ
What does the 'HE3' suffix indicate in SMAJ43CHE3/61?
The 'HE3' suffix in SMAJ43CHE3/61 signifies that the device is RoHS-compliant, high-reliability/automotive grade, and qualified to AEC-Q101 standards. It also denotes matte tin-plated leads meeting J-STD-002 and JESD22-B102 solderability requirements, plus JESD 201 Class 2 whisker resistance - all confirmed in Vishay Document 88390.
Is SMAJ43CHE3/61 unidirectional or bidirectional?
SMAJ43CHE3/61 is a bi-directional TVS diode, as indicated by the 'C' in its part number (SMAJ43C) and explicitly stated in Vishay's documentation: "For bi-directional use C or CA suffix". Its electrical characteristics - including VBR, VC, and IPPM - apply identically in both directions, with no polarity marking on the DO-214AC package.
What is the maximum clamping voltage of SMAJ43CHE3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ43CHE3/61 is 76.7 V at 5.2 A peak pulse current (IPPM) with a 10/1000 µs waveform, per Vishay Document 88390, page 3. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Does SMAJ43CHE3/61 meet automotive qualification standards?
Yes, SMAJ43CHE3/61 meets AEC-Q101 qualification requirements for automotive-grade discrete semiconductors. The 'HE3' suffix and Vishay's official documentation confirm high-reliability/automotive grade status, including validation for temperature cycling, mechanical shock, and humidity testing - essential for under-hood and safety-critical applications.
What is the thermal resistance of SMAJ43CHE3/61 from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMAJ43CHE3/61 is 120 °C/W, as specified in Vishay Document 88390, page 4. This value assumes mounting on 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal and is critical for calculating junction temperature rise during repetitive surge events.
SMAJ43CHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 5.2A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ43CHE3/61 FAQ
1.How can I place an order for SMAJ43CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CHE3/61 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 SMAJ43CHE3/61 reliable?
The price and inventory of SMAJ43CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CHE3/61?
SMAJ43CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CHE3/61 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 SMAJ43CHE3/61?
For technical support, including SMAJ43CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CHE3/61 requirements.
6.How does Aetrix verify that SMAJ43CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43CHE3/61 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 SMAJ43CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43CHE3/61?
All SMAJ43CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CHE3/61, 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 SMAJ43CHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ43CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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