My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ43C-E3/5A
- Part No.:
- SMAJ43C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43C-E3/5A.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ43C-E3/5A from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features a 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 protecting sensor interfaces and automotive control modules against ESD and inductive switching surges.
For engineers reviewing the SMAJ43C-E3/5A datasheet, SMAJ43C-E3/5A pinout, SMAJ43C-E3/5A application, or SMAJ43C-E3/5A equivalent, this device is evaluated for bi-directional surge protection in low-capacitance, high-reliability PCB layouts where polarity-agnostic clamping and JEDEC-compliant thermal performance are required.
Technical Context
This bi-directional TVS diode 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 under standardized 10/1000 µs surge waveforms, delivering consistent voltage limiting across temperature ranges from –55 °C to +150 °C.
The device exhibits low incremental surge resistance and fast response time (<1 ps), enabling effective suppression of ESD events (IEC 61000-4-2) and lightning-induced transients (IEC 61000-4-5). It meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating 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; ensures downstream ICs (e.g., CAN transceivers, MCU I/O) remain below absolute maximum ratings during surge. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); supports robust protection in automotive load-dump and industrial motor-drive environments. |
| IPPM | 5.2 A - Peak pulse current capability; correlates directly to energy absorption (≈ 2.08 J) under standard surge conditions. |
| TJ Range | –55 °C to +150 °C - Full operational junction temperature range; validated for under-hood automotive and industrial ambient conditions. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; requires minimum 5.0 × 5.0 mm copper pad per terminal for rated power dissipation. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking. Case conforms to UL 94 V-0 flammability rating; terminals are matte tin-plated for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either lead serves as input/output for surge current in either polarity - eliminates orientation errors during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus) without external polarity management. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity when mounted on recommended 5.0 × 5.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.78) | Minimizes overvoltage stress on protected circuitry - critical for 3.3 V/5 V logic interfacing with higher-voltage domains. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak, simplifying SMT manufacturing without dry-pack requirements. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting wheel speed sensor outputs exposed to alternator load dump and relay coil flyback in chassis harnesses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed at connector interface to limit transients to ≤76.7 V before reaching analog front-end amplifier. Use Value: Prevents latch-up or gate oxide damage in precision op-amps and ADC drivers while maintaining signal integrity across –40 °C to +125 °C operation. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) on factory-floor communication buses subject to ground potential shifts and EFT bursts. IC Role / Device Role / Timing Role: Line-side TVS absorbing common-mode surges on A/B differential pair without adding capacitance that degrades 10 Mbps signal integrity. Use Value: Maintains <15 pF junction capacitance at 0 V bias, preserving rise/fall times and minimizing bit error rate in long-distance (>1 km), multi-drop networks. |
| Consumer Power Adapter Input | Telecom DSL Line Card |
|
Use Scenario: Secondary-side surge protection on 48 V DC output rails of wall-mounted USB-C PD adapters subjected to conducted transients per IEC 61000-4-4. IC Role / Device Role / Timing Role: Fast-response shunt device clamping overvoltage spikes before they reach synchronous rectifier MOSFETs and post-regulation LDOs. Use Value: Withstands repetitive 300 W surges above 78 V and delivers stable clamping across 1000+ surge cycles without parameter drift. |
Use Scenario: Primary protection for ADSL/VDSL line interface circuits exposed to lightning-induced longitudinal surges on twisted-pair copper loops. IC Role / Device Role / Timing Role: First-stage bi-directional suppressor on tip/ring inputs, coordinated with gas discharge tube (GDT) for staged energy diversion. Use Value: Provides sub-nanosecond response to fast-rising transients while surviving 40 A 8.3 ms half-sine surge (IFSM) without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA-E3/5A | Identical electrical specs and package; "CA" suffix explicitly denotes bi-directional variant per Vishay naming convention (C = bi-directional, A = enhanced VBR tolerance). | No functional difference - used interchangeably in designs requiring documented bi-directional compliance per family datasheet Table 1. | Select SMAJ43CA-E3/5A when BOM traceability requires explicit "CA" designation matching reference design schematics. |
| SMBJ43C-E3/52 | Same VWM (43 V) and VC (76.7 V), but in larger DO-214AA (SMB) package with 600 W PPPM rating and higher IPPM (7.7 A). | Better suited for higher-energy threats (e.g., ISO 7637-2 Pulse 5a); requires larger PCB footprint and different thermal pad layout. | Choose SMBJ43C-E3/52 only when system-level testing confirms need for >400 W surge handling - otherwise SMAJ43C-E3/5A offers optimal size/power balance. |
Compared with SMAJ43CA-E3/5A, the SMAJ43C-E3/5A shares identical performance but uses legacy suffixing; versus SMBJ43C-E3/52, it trades 50 % higher peak power for 30 % smaller board area and lower thermal mass - critical for space-constrained automotive ECUs and portable telecom modules.
Availability
SMAJ43C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer power adapter outputs, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ43C-E3/5A 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 engineered for automotive, industrial, and computing applications.
The SMAJ series is part of Vishay's TRANSZORB® TVS platform, developed specifically for surface-mount transient suppression in space-constrained, high-surge environments where bi-directional symmetry and JEDEC-compliant manufacturability are essential.
FAQ
What does the "C" suffix indicate in SMAJ43C-E3/5A?
The "C" suffix in SMAJ43C-E3/5A explicitly denotes a bi-directional configuration, meaning the device provides symmetrical clamping in both forward and reverse directions. This is confirmed in Vishay Document 88390, which states "For bi-directional use C or CA suffix" and lists electrical characteristics applying "in both directions." The SMAJ43C-E3/5A functions identically regardless of terminal orientation, eliminating polarity-dependent layout constraints during PCB design and assembly.
Is SMAJ43C-E3/5A RoHS compliant and qualified for automotive use?
SMAJ43C-E3/5A carries the "E3" suffix, indicating RoHS compliance per 2002/95/EC and WEEE 2002/96/EC directives. However, it is not AEC-Q101 qualified - that status applies only to variants with "HE3" suffix (e.g., SMAJ43CHE3/5A). The SMAJ43C-E3/5A is commercial-grade and rated for operation from –55 °C to +150 °C, making it suitable for under-hood automotive applications only when supported by system-level validation and derating.
What is the maximum clamping voltage of SMAJ43C-E3/5A and at what current is it measured?
The maximum clamping voltage (VC) of SMAJ43C-E3/5A is 76.7 V, measured at a peak pulse current (IPPM) of 5.2 A under the standardized 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table of Vishay Document 88390 and represents the upper limit of voltage seen by protected circuitry during worst-case surge events - a key parameter for ensuring downstream ICs remain within their absolute maximum ratings.
How does SMAJ43C-E3/5A differ from SMAJ43A-E3/5A?
SMAJ43C-E3/5A is bi-directional, while SMAJ43A-E3/5A is uni-directional. Their clamping voltages differ: SMAJ43C-E3/5A has VC = 76.7 V at 5.2 A, whereas SMAJ43A-E3/5A has VC = 69.4 V at 5.8 A. The "A" suffix indicates tighter VBR tolerance (±5 % vs. ±10 % for non-A parts), but the "C" suffix overrides directionality - so SMAJ43C-E3/5A cannot replace SMAJ43A-E3/5A in circuits requiring cathode-anode polarity control, such as DC power rail protection.
What PCB layout guidance applies to SMAJ43C-E3/5A for optimal thermal and surge performance?
For rated 400 W peak pulse power, SMAJ43C-E3/5A must be mounted on minimum 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88390. These pads ensure adequate heat dissipation and low-inductance surge current paths. Avoid narrow traces between the device and protected node; place SMAJ43C-E3/5A as close as possible to the connector or IC pin to minimize parasitic inductance that could elevate clamped voltage during fast transients.
SMAJ43C-E3/5A 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-E3/5A FAQ
1.How can I place an order for SMAJ43C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43C-E3/5A 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-E3/5A reliable?
The price and inventory of SMAJ43C-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ43C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43C-E3/5A?
SMAJ43C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43C-E3/5A 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-E3/5A?
For technical support, including SMAJ43C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43C-E3/5A requirements.
6.How does Aetrix verify that SMAJ43C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ43C-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ43C-E3/5A?
All SMAJ43C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43C-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ43C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43C-E3/5A 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 …
