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Vishay General Semiconductor - Diodes Division SMAJ43C-E3/61
- Part No.:
- SMAJ43C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43C-E3/61.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ43C-E3/61 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, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect sensor interfaces and automotive control modules against inductive switching spikes.
For engineers reviewing the SMAJ43C-E3/61 datasheet, SMAJ43C-E3/61 pinout, SMAJ43C-E3/61 application, or SMAJ43C-E3/61 equivalent, key selection criteria include bi-directional clamping capability, low leakage (<1 µA at 43 V), RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 47.8 V and 58.4 V at 1 mA test current. Its clamping behavior is characterized by low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The device is rated for 150 °C maximum junction temperature and exhibits thermal resistance of 120 °C/W (junction-to-ambient) when mounted per recommended 0.2" × 0.2" copper pad layout. It meets JESD201 Class 1A whisker resistance and is qualified to AEC-Q101 when ordered with HE3 suffix - though SMAJ43C-E3/61 is commercial-grade (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VC @ IPPM | 76.7 V at 5.2 A - clamped voltage during 10/1000 µs surge; determines protected IC's voltage stress limit. |
| PPPM | 400 W - peak pulse power handling (derated above 78 V); supports robust surge immunity in industrial environments. |
| IPPM | 5.2 A - maximum non-repetitive surge current; sets minimum PCB trace width and fuse coordination requirements. |
| ID @ VWM | <1 µA - reverse leakage at stand-off voltage; ensures negligible power loss and signal integrity in high-impedance circuits. |
| TJ Range | −55 °C to +150 °C - operational and storage temperature range; suitable for under-hood automotive and industrial control applications. |
| Package | DO-214AC (SMA) - surface-mount package with 2.54 mm lead pitch; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two coplanar matte tin-plated leads; polarity unmarked for bi-directional types (SMAJ43C); cathode band omitted per specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No polarity dependence - either terminal serves as input/output for transient energy diversion to ground or rail. |
| Case / Body | Thermal and mechanical interface | Non-conductive epoxy body; requires 5.0 × 5.0 mm copper pads per terminal for rated 400 W pulse dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, sensor bridges) without polarity concerns. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing on 12 V systems with margin. |
| Low leakage (<1 µA @ 43 V) | Prevents DC loading on high-impedance analog inputs (e.g., thermistor, RTD, or Hall-effect sensor outputs). |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-bake requirement and enables direct placement into standard lead-free reflow processes. |
| Glass-passivated junction | Ensures stable VBR and low parameter drift over temperature and lifetime in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting engine coolant temperature and manifold absolute pressure (MAP) sensor signal lines from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and chassis ground, responding within <1 ns to divert surge energy. Use Value: Maintains signal integrity below 76.7 V clamping threshold while drawing <1 µA leakage at 43 V nominal supply - critical for 12-bit ADC accuracy. |
Use Scenario: Safeguarding differential RS-485 transceivers (e.g., SN65HVD230) in factory automation PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground transient suppressor on A/B bus pairs, operating symmetrically across ±43 V common-mode range. Use Value: Withstands repetitive 400 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards. |
| Consumer Appliance Control Board | Telecom Power Input Stage |
Use Scenario: Shielding microcontroller GPIOs and relay driver inputs in washing machine control boards from inductive kickback during solenoid actuation. IC Role / Device Role / Timing Role: Fast-response shunt protector placed directly at connector entry point, clamping transients before reaching logic-level circuitry. Use Value: 5.2 A peak current rating allows coordination with 1 A slow-blow fuses; DO-214AC footprint enables high-density layout on cost-sensitive consumer PCBs. |
Use Scenario: Front-end surge suppression on 48 V telecom power input rails feeding PoE injectors and remote radio units. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection scheme, limiting voltage to 76.7 V before downstream MOVs or GDTs activate. Use Value: 43 V VWM provides optimal margin above 48 V nominal with 10 % tolerance (up to 52.8 V), avoiding false triggering during normal operation. |
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 | Identical electrical specs and packaging; CA suffix denotes same bi-directional functionality as C suffix per Vishay documentation. | No functional difference - CA and C are interchangeable per Vishay's naming convention for bi-directional variants. | Select SMAJ43CA-E3/61 only if legacy BOM or distributor inventory mandates CA suffix; otherwise SMAJ43C-E3/61 is functionally identical. |
| SMBJ43C-E3/52 | Same VWM (43 V) and VC (76.7 V), but higher PPPM (600 W) and larger SMB (DO-214AA) package with 3.94 mm lead pitch. | Requires PCB layout change due to larger footprint and different thermal pad area; suited for higher-energy surge environments. | Choose SMBJ43C-E3/52 when system-level surge testing exceeds 400 W requirements or when board space permits larger package for improved thermal margin. |
Compared with SMAJ43C-E3/61, SMAJ43CA-E3/61 offers no electrical or mechanical distinction, while SMBJ43C-E3/52 delivers 50 % higher pulse power at the cost of increased board area and altered thermal design - making SMAJ43C-E3/61 optimal for space-constrained 400 W-class protection.
Availability
SMAJ43C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer appliance control boards requiring stable component supply and RoHS-compliant SMT assembly.
Supply support for SMAJ43C-E3/61 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 application-specific performance.
The SMAJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-speed transient suppression in automotive, industrial, and telecom systems where precise clamping and long-term stability are critical.
FAQ
What is the clamping voltage of the SMAJ43C-E3/61 under a 10/1000 µs surge?
The SMAJ43C-E3/61 has a maximum clamping voltage (VC) of 76.7 V at 5.2 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 3 of Vishay document 88390, and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ43C-E3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ43C-E3/61 suitable for bi-directional signal line protection?
Yes, SMAJ43C-E3/61 is explicitly a bi-directional TVS diode, as indicated by the "C" suffix and confirmed in the "DEVICES FOR BI-DIRECTION APPLICATIONS" section of Vishay document 88390. Its electrical characteristics apply identically in both directions, with no polarity marking on the DO-214AC package - making it ideal for protecting AC-coupled interfaces like RS-485, CAN, or audio lines where signal polarity reverses.
What is the maximum reverse leakage current for SMAJ43C-E3/61 at its stand-off voltage?
The SMAJ43C-E3/61 exhibits a maximum reverse leakage current (ID) of 1 µA at its 43 V stand-off voltage (VWM), as specified in the Electrical Characteristics table on page 3 of Vishay document 88390. This ultra-low leakage ensures minimal impact on high-impedance sensor circuits and battery-powered systems where quiescent current must be tightly controlled.
Does SMAJ43C-E3/61 meet automotive qualification standards?
The SMAJ43C-E3/61 is commercial-grade (E3 suffix) and not AEC-Q101 qualified; however, Vishay offers the SMAJ43CHE3/61 variant with HE3 suffix for automotive applications. Per document 88390, the HE3 version undergoes additional screening and is explicitly rated for AEC-Q101 - whereas SMAJ43C-E3/61 is intended for industrial and consumer use where extended temperature and reliability validation are not mandated.
What PCB pad layout is required to achieve the rated 400 W pulse power for SMAJ43C-E3/61?
To achieve the full 400 W peak pulse power rating, SMAJ43C-E3/61 must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the "MAXIMUM RATINGS" footnote (2) on page 1 of Vishay document 88390. Smaller pads result in thermal derating - for example, the device is rated at 300 W above 78 V, but SMAJ43C-E3/61 remains at 400 W since its VWM is 43 V.
SMAJ43C-E3/61 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ43C-E3/61 FAQ
1.How can I place an order for SMAJ43C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43C-E3/61 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 SMAJ43C-E3/61 reliable?
The price and inventory of SMAJ43C-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43C-E3/61?
SMAJ43C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43C-E3/61 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 SMAJ43C-E3/61?
For technical support, including SMAJ43C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43C-E3/61 requirements.
6.How does Aetrix verify that SMAJ43C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43C-E3/61 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 SMAJ43C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43C-E3/61?
All SMAJ43C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43C-E3/61, 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 SMAJ43C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ43C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43C-E3/61 Tags
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