My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ43CA-E3/61
- Part No.:
- SMAJ43CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CA-E3/61.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:11,194
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ43CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 5.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ43CA-E3/61 datasheet, SMAJ43CA-E3/61 pinout, SMAJ43CA-E3/61 application, or SMAJ43CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.37), AEC-Q101 qualification eligibility (via HE3 suffix variants), UL 497B recognition, and compatibility with automated SMT placement on DO-214AC (SMA) footprint.
Technical Context
This device operates as a silicon avalanche diode optimized for fast transient suppression: it responds in <1 ps to ESD and surge events, exhibits low incremental surge resistance (typical <0.3 Ω), and maintains stable clamping performance across -55 °C to +150 °C junction temperature range. Its bidirectional symmetry ensures identical electrical behavior in both polarities, eliminating polarity concerns during board layout.
The SMAJ43CA-E3/61 leverages glass-passivated junction technology for robust reliability and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It delivers 400 W peak pulse power up to 78 V; above that threshold, derated to 300 W - a critical design constraint when protecting 48 V industrial buses or 42 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - precise avalanche onset range ensuring predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 69.4 V at 5.8 A IPPM - peak voltage seen by protected circuit under 10/1000 μs surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - energy-handling capacity for standardized lightning/surge waveforms |
| ID (Max Reverse Leakage) | 1.0 μA at VWM - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max. | +150 °C - enables deployment in under-hood automotive or high-temperature industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as current entry/exit point during bidirectional clamping; no PCB orientation dependency |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed copper pad area provides primary thermal path to PCB; requires 5.0 mm × 5.0 mm copper per terminal per datasheet fig. 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line) when properly mounted on recommended copper pads |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring safety agency compliance |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications including body electronics and ADAS sensor interfaces |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without moisture sensitivity handling requirements |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load dump and inductive switching spikes in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point before LDO regulator input. Use Value: Limits transient voltage to ≤69.4 V during 12 V system load dump (ISO 7637-2 Pulse 5a), preventing latch-up or gate oxide damage in downstream 5 V logic. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on isolated input optocoupler supply rail. Use Value: Maintains <1.0 μA leakage at 24 V nominal, minimizing false triggering while clamping 1 kV/500 A surges per IEC 61000-4-5. |
| Telecom Base Station Sensor Interface | Consumer Appliance Motor Driver Feedback |
Use Scenario: Safeguarding RS-485 transceivers and temperature/humidity sensor analog outputs in outdoor telecom cabinets exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Secondary-level protection device located after gas discharge tube (GDT) primary stage. Use Value: Provides sub-nanosecond response to fast-rising transients missed by GDTs, clamping residual overshoot to safe levels for ±5 V differential receivers. |
Use Scenario: Suppressing commutation spikes on hall-effect sensor supply lines in BLDC motor drives embedded in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Localized TVS placed adjacent to sensor IC power pins, decoupled with 100 nF ceramic capacitor. Use Value: Withstands repetitive 400 W pulses from PWM-driven inductive loads without degradation, ensuring >10-year field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and package | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects) | Choose SMAJ43CA-M3/61 when environmental compliance exceeds commercial-grade requirements |
| SMAJ43AHE3_A/H | AEC-Q101 qualified version with same VWM/VC/PPPM but extended qualification testing (HTOL, TC, UHAST) | Required for automotive applications subject to OEM PPAP submission and long-term reliability validation | Specify SMAJ43AHE3_A/H only when automotive qualification is contractually required |
Compared with SMAJ43CA-E3/61, the M3 variant adds halogen-free construction without altering surge performance, while the HE3 variant adds automotive-grade reliability validation - neither offers pin-compatible upgrades but serve distinct compliance-driven selection paths.
Availability
SMAJ43CA-E3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, telecom sensor interfaces, and consumer appliance motor control systems requiring stable component supply and full traceability.
Supply support for SMAJ43CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and telecom markets - engineered for robustness under repetitive surge stress and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of the SMAJ43CA-E3/61 under a 10/1000 μs surge?
The SMAJ43CA-E3/61 has a maximum clamping voltage (VC) of 69.4 V at 5.8 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMAJ43CA-E3/61 suitable for automotive applications?
The SMAJ43CA-E3/61 itself is commercial-grade; however, its automotive-qualified counterpart SMAJ43AHE3_A/H is AEC-Q101 certified. For non-automotive use, SMAJ43CA-E3/61 remains valid in under-hood-adjacent industrial environments due to its -55 °C to +150 °C operating range and MSL Level 1 reflow compatibility - but formal automotive deployment requires the HE3-suffixed variant.
How does the bidirectional design of the SMAJ43CA-E3/61 affect PCB layout?
The SMAJ43CA-E3/61 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment - either terminal may connect to line or return. This simplifies routing on dense boards and eliminates risk of assembly error, unlike unidirectional TVS diodes which mandate cathode-band alignment with system ground reference.
What is the thermal resistance of the SMAJ43CA-E3/61, and how does it impact power dissipation?
The SMAJ43CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. At its rated 3.3 W steady-state power dissipation, this results in ~396 °C junction rise above ambient - confirming it must operate under pulsed conditions only. Continuous DC power handling is limited to milliwatts; all surge energy must be transient and non-repetitive per datasheet fig. 2 derating curves.
Does the SMAJ43CA-E3/61 meet any safety certifications?
Yes - the SMAJ43CA-E3/61 is Underwriters Laboratory (UL) recognized under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for telecommunications primary protector classification. This certification validates its suitability in safety-critical surge protection circuits where third-party agency approval is mandatory, such as in network equipment and industrial gateways.
SMAJ43CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SMAJ43CA-E3/61 FAQ
1.How can I place an order for SMAJ43CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CA-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 SMAJ43CA-E3/61 reliable?
The price and inventory of SMAJ43CA-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 SMAJ43CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CA-E3/61?
SMAJ43CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CA-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 SMAJ43CA-E3/61?
For technical support, including SMAJ43CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ43CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43CA-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 SMAJ43CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43CA-E3/61?
All SMAJ43CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CA-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 SMAJ43CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ43CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43CA-E3/61 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
