My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ43CA-M3/61
- Part No.:
- SMAJ43CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CA-M3/61.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,348
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ43CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 5.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ43CA-M3/61 datasheet, SMAJ43CA-M3/61 pinout, SMAJ43CA-M3/61 application, or SMAJ43CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.61), AEC-Q101 qualification eligibility (via HM3 suffix), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), then rapidly avalanches below its 47.8–52.8 V breakdown range (VBR at 1 mA) to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above), with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), enabling reliable operation up to +150 °C junction temperature when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - guaranteed avalanche onset window defining protection threshold |
| VC @ IPPM | 69.4 V at 5.8 A - clamped voltage during 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 400 W - peak transient power handling capacity with standard lightning/surge waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power impact on sensitive analog/sensor circuits |
| TJ max | +150 °C - maximum junction temperature supporting operation in under-hood automotive environments |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with IPC-7351B standard |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity not marked on bidirectional types (SMAJ43CA); terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current in either polarity - no cathode band marking required |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or return rail during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge (4 kV/2 Ω) on 50 Ω source impedance test setups |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without baking - simplifies SMT manufacturing |
| Halogen-free & RoHS-compliant (M3) | Fulfills EU Directive 2011/65/EU and JEDEC JS709E material requirements for green electronics |
| AEC-Q101 qualification option | HM3 variant available for automotive applications requiring stress-tested reliability per JESD22-A108 |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between signal line and chassis ground, responding within <1 ns to limit voltage excursion. Use Value: Maintains signal integrity by clamping transients to ≤69.4 V while drawing only 1.0 μA leakage at 43 V nominal bus voltage. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across input terminals, absorbing repetitive 400 W surges without degradation. Use Value: Eliminates need for external series impedance or dual unidirectional devices - reduces BOM count and PCB area. |
| Consumer Power Adapter ESD | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and AC/DC wall adapters exposed to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Final-stage transient suppressor after primary regulation, clamping output rail spikes before reaching connected devices. Use Value: Achieves 69.4 V clamping at 5.8 A with 0.01% duty cycle rating - exceeds IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) immunity requirements. |
Use Scenario: Protecting Ethernet PHY interfaces, RS-485 transceivers, and DSL line drivers from lightning-induced longitudinal surges on twisted-pair cables. IC Role / Device Role / Timing Role: Bidirectional shunt device across differential pair or line-to-ground, symmetrically limiting both polarities. Use Value: Matches telecom surge standards (GR-1089-CORE) with 43 V standoff and 69.4 V clamping - preserves signal swing margin for 3.3 V/5 V logic interfaces. |
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 | RoHS-compliant commercial grade; no halogen-free certification; same electrical specs and package | Preferred for non-automotive industrial/commercial designs where halogen-free is not mandated | Select E3 for cost-sensitive applications without green-material compliance requirements |
| SMAJ43CAHM3_A/H | AEC-Q101 qualified; halogen-free; identical clamping and surge ratings; same SMA package | Required for automotive ECUs, ADAS sensors, and infotainment systems needing automotive-grade reliability | Choose HM3 variant when qualifying for ISO/TS 16949 production or automotive OEM sourcing |
Compared with SMAJ43CA-M3/61, the E3 version offers identical protection performance at lower material cost but lacks halogen-free compliance, while the HM3 variant adds AEC-Q101 qualification for automotive use - neither is pin-compatible with unidirectional variants like SMAJ43A-M3/61 due to polarity architecture differences.
Availability
SMAJ43CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapter secondary-side protection, and telecom line interface designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ43CA-M3/61 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 is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-energy surge immunity and long-term stability are critical design requirements.
FAQ
What is the clamping voltage of SMAJ43CA-M3/61 under a 10/1000 μs surge?
The SMAJ43CA-M3/61 has a maximum clamping voltage (VC) of 69.4 V at 5.8 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per Fig. 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMAJ43CA-M3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ43CA-M3/61 suitable for automotive applications?
SMAJ43CA-M3/61 itself is a commercial-grade, halogen-free, RoHS-compliant part - not AEC-Q101 qualified. However, the functionally identical SMAJ43CAHM3_A/H variant is AEC-Q101 qualified and shares the same electrical specs and SMA package. For automotive use, specify the HM3 suffix; the SMAJ43CA-M3/61 remains appropriate for non-automotive industrial or consumer applications requiring halogen-free compliance.
What does the "CA" suffix indicate in SMAJ43CA-M3/61?
The "CA" suffix in SMAJ43CA-M3/61 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants (e.g., SMAJ43A), the CA version has no polarity marking and functions identically regardless of voltage polarity applied across its terminals. This makes SMAJ43CA-M3/61 ideal for AC-coupled or floating signal lines.
What is the maximum leakage current of SMAJ43CA-M3/61 at its stand-off voltage?
The SMAJ43CA-M3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 43 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal distortion in high-impedance sensor or communication circuits. The SMAJ43CA-M3/61 maintains this specification across its full operating temperature range per Vishay's published electrical characteristics table.
Does SMAJ43CA-M3/61 require special PCB layout considerations?
Yes - Vishay specifies that SMAJ43CA-M3/61 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power. Smaller pads reduce thermal dissipation and cause premature failure under surge conditions. The SMAJ43CA-M3/61 also requires short, low-inductance traces to ground to preserve sub-nanosecond response time and avoid voltage overshoot during fast transients.
SMAJ43CA-M3/61 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-M3/61 FAQ
1.How can I place an order for SMAJ43CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CA-M3/61 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-M3/61 reliable?
The price and inventory of SMAJ43CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CA-M3/61?
SMAJ43CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CA-M3/61 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-M3/61?
For technical support, including SMAJ43CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ43CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43CA-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43CA-M3/61?
All SMAJ43CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CA-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ43CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43CA-M3/61 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 …
