My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ43A-M3/61
- Part No.:
- SMAJ43A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43A-M3/61.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,083
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ43A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 43 V stand-off 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 industrial and automotive electronics.
For engineers reviewing the SMAJ43A-M3/61 datasheet, SMAJ43A-M3/61 pinout, SMAJ43A-M3/61 application, or SMAJ43A-M3/61 equivalent, this device delivers verified surge protection performance in compact SMA packaging with halogen-free, RoHS-compliant construction and AEC-Q101 qualification available via HM3 suffix variants.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, responding within <1 ps to ESD and lightning-induced transients. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance (rd ≈ 4.2 Ω), enabling precise voltage limiting during 400 W pulses.
Thermal design relies on RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. Polarity is marked by cathode band; no marking on bidirectional versions.
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 - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage |
| VC (Clamping Voltage) | 69.4 V at IPPM = 5.8 A - Measured peak voltage during 10/1000 μs surge; determines protected circuit's maximum overvoltage stress |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per single 10/1000 μs transient; derates to 300 W above 78 V |
| IPPM (Peak Pulse Current) | 5.8 A - Maximum non-repetitive surge current supported at rated clamping voltage; defines PCB trace and layout current-handling requirement |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated placement and reflow |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse-battery events) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates breakdown when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating in standard layouts |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global industrial and automotive supply chains |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns |
| 150 °C max junction temperature | Validates operation in engine control units, motor drives, and other high-temperature embedded systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients up to 35 V and ISO 7637-2 pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Clamps to 69.4 V at 5.8 A, maintaining safe headroom below typical 80 V automotive IC absolute maximum ratings. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal pairs to suppress sub-ns transients without distorting mV-level signals. Use Value: Sub-100 pF junction capacitance at VWM preserves signal integrity while delivering 400 W transient immunity. |
| DC Motor Drive Board Protection | Telecom Power Supply Input Stage |
|
Use Scenario: Safeguarding H-bridge gate drivers and current-sense amplifiers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Fast-response TVS across motor supply rails to absorb stored inductive energy during MOSFET turn-off. Use Value: <1 ps response time and 4.2 Ω dynamic impedance limit voltage overshoot to ≤69.4 V during 100 ns edge transitions. |
Use Scenario: Front-end surge suppression on 48 V telecom rectifier inputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection network, coordinating with GDTs and MOVs. Use Value: 400 W rating allows coordination with upstream components to handle 10/1000 μs surges up to 4 kV without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3) | Preferred for commercial-grade applications where halogen-free is not mandated | Select E3 for cost-sensitive non-automotive designs; M3 required for strict environmental compliance |
| SMAJ43CA-M3/61 | Bidirectional version; symmetric VBR (47.8–52.8 V) in both directions; same VC and PPPM | Required for AC-coupled or floating signal lines where polarity reversal occurs | Choose CA variant only when protecting bidirectional buses (e.g., RS-485, CAN) or ungrounded sensors |
Compared with SMAJ43A-E3/61, the M3 suffix adds halogen-free compliance without performance trade-offs; versus SMAJ43CA-M3/61, the unidirectional SMAJ43A-M3/61 provides tighter leakage control and avoids unnecessary bidirectional conduction in DC power rails.
Availability
SMAJ43A-M3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC motor controllers, and telecom power supplies requiring stable component supply with halogen-free compliance and AEC-Q101 traceability.
Supply support for SMAJ43A-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, power efficiency, and automotive qualification.
The SMAJ series targets board-level transient protection in space-constrained applications, delivering standardized 400 W surge capability across 5.0–188 V VWM range in industry-standard SMA packages.
FAQ
What is the clamping voltage of SMAJ43A-M3/61 at its rated peak pulse current?
The SMAJ43A-M3/61 has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 5.8 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ43A-M3/61 maintains this clamping performance due to its low dynamic impedance and stable avalanche characteristics.
Is SMAJ43A-M3/61 suitable for automotive applications?
Yes, SMAJ43A-M3/61 is halogen-free and RoHS-compliant, and the HM3 variant (e.g., SMAJ43A-HM3/61) is explicitly AEC-Q101 qualified for automotive use. While the base M3 suffix denotes commercial-grade qualification, its 150 °C junction rating, robust surge capability, and compatibility with automotive PCB assembly processes make it suitable for non-safety-critical automotive subsystems. For full qualification, specify the HM3 suffix when ordering SMAJ43A-M3/61 derivatives.
How does the SMAJ43A-M3/61 differ from SMAJ43CA-M3/61?
The SMAJ43A-M3/61 is unidirectional, with cathode marking and asymmetric conduction (forward bias conducts, reverse bias clamps above VBR). The SMAJ43CA-M3/61 is bidirectional, offering identical clamping in both polarities - ideal for AC or floating lines. Both share the same VWM (43 V), VBR, VC, and PPPM, but SMAJ43A-M3/61 exhibits lower reverse leakage (<1 μA at 43 V) and is preferred for DC power rail protection. The SMAJ43A-M3/61 must not be substituted for CA types in bidirectional signal paths.
What is the thermal resistance of SMAJ43A-M3/61, and how does it affect layout?
The SMAJ43A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and junction-to-lead resistance (RθJL) of 30 °C/W. This means that at 3.3 W steady-state dissipation, junction temperature rises ~400 °C above ambient - confirming that the device is intended for transient-only duty, not continuous power. Layout must provide minimum recommended pad area to achieve rated surge performance; undersized pads increase RθJA and risk thermal failure during repetitive surges. The SMAJ43A-M3/61 requires no heatsink but depends critically on PCB copper mass for thermal management.
Does SMAJ43A-M3/61 meet any international surge immunity standards?
The SMAJ43A-M3/61 is engineered to meet key surge immunity requirements including IEC 61000-4-5 (lightning surge, 4 kV/2 Ω combination wave) and ISO 7637-2 (automotive transients, Pulse 1, 2a, 3a/b, and 5a). Its 400 W peak pulse power rating with 10/1000 μs waveform directly supports Level 4 testing per IEC 61000-4-5. While the device itself is not "certified" to these standards, its published electrical characteristics - especially VC, IPPM, and response time - are validated to enable compliant system-level designs. System validation remains the responsibility of the end designer, but the SMAJ43A-M3/61 provides the foundational clamping performance needed to pass those tests.
SMAJ43A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ43A-M3/61 FAQ
1.How can I place an order for SMAJ43A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43A-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 SMAJ43A-M3/61 reliable?
The price and inventory of SMAJ43A-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 SMAJ43A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43A-M3/61?
SMAJ43A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43A-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 SMAJ43A-M3/61?
For technical support, including SMAJ43A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43A-M3/61 requirements.
6.How does Aetrix verify that SMAJ43A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43A-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 SMAJ43A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43A-M3/61?
All SMAJ43A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43A-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 SMAJ43A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ43A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43A-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 …
