My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ43A-M3/57T
- Part No.:
- SMCJ43A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43A-M3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ43A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 43 V standoff voltage, 69.4 V clamping voltage at 21.6 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power supplies.
For engineers reviewing the SMCJ43A-M3/57T datasheet, SMCJ43A-M3/57T pinout, SMCJ43A-M3/57T application, or SMCJ43A-M3/57T equivalent, this page delivers verified electrical parameters, thermal behavior, polarity marking, JEDEC-compliant packaging, and AEC-Q101-qualified alternatives - all critical for ESD/surge design validation and BOM selection.
Technical Context
The SMCJ43A-M3/57T operates as a unidirectional avalanche-clamping device with a breakdown voltage range of 47.8 V to 52.8 V at 1 mA test current and a maximum reverse leakage current of 1.0 μA at 43 V standoff. Its low incremental surge resistance and fast response time enable effective suppression of 10/1000 μs waveform transients without thermal runaway.
Thermally, it features a junction-to-ambient thermal resistance of 75 °C/W and a junction-to-lead resistance of 15 °C/W, supporting operation from –55 °C to +150 °C. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the halogen-free M3 suffix confirms RoHS compliance per JEDEC JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed avalanche initiation range under standardized DC test |
| VC (Clamping Voltage) | 69.4 V at 21.6 A (10/1000 μs) - Peak voltage seen by protected circuit during rated surge |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under standard 10/1000 μs waveform |
| IPPM (Peak Pulse Current) | 21.6 A - Maximum non-repetitive surge current the device safely clamps |
| TJ max. | +150 °C - Maximum junction temperature enabling reliable operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
SMCJ43A-M3/57T uses the SMC (DO-214AB) package: a surface-mount, low-profile, molded plastic case with matte tin-plated leads. Polarity is marked by a cathode band on the body; the banded end is the cathode terminal. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for full 1500 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in reverse-biased protection configuration | Connected to protected line (e.g., VIN, signal trace); clamps to ground when transient exceeds VWM |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without derating in standard layout |
| 69.4 V clamping at 21.6 A | Limits downstream voltage stress on 48 V-rated components such as automotive gate drivers and CAN transceivers |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive environmental requirements and supports lead-free reflow profiles up to 260 °C peak |
| AEC-Q101 qualification available | Validated reliability for automotive powertrain and chassis applications where failure modes must be rigorously controlled |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive analog front-ends |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: 12 V/24 V battery rail protection in engine control units exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 120 V/350 ms load dump events to ≤69.4 V, preventing damage to upstream PMICs and microcontrollers. | Use Scenario: Analog output line (e.g., 4–20 mA current loop) from pressure sensor in factory automation PLC modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor output trace before isolation amplifier input. Use Value: Suppresses 1 kV EFT bursts per IEC 61000-4-4 while maintaining <1.0 μA leakage at 24 V supply, preserving signal accuracy. |
| Telecom DC Feeder Protection | Consumer Device USB Port Surge Shielding |
Use Scenario: -48 V DC power feed line in remote radio head (RRH) base station equipment. IC Role / Device Role / Timing Role: Bidirectional-capable variant used in unidirectional configuration across -48 V rail and return. Use Value: Handles 1500 W lightning-induced surges on outdoor feeder cables while meeting UL 497B protector classification. | Use Scenario: VBUS line protection in USB-C host port of smart home hub with external power adapter. IC Role / Device Role / Timing Role: Primary TVS between USB connector and USB controller's overvoltage protection input. Use Value: Limits 10/1000 μs surge to ≤69.4 V within 1 ns, preventing latch-up in USB PHY and preserving enumeration integrity. |
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-M3/57T | Lower 400 W peak pulse power; same VWM/VC but reduced IPPM (9.6 A) | Suitable only for lower-energy threats (IEC 61000-4-5 Level 2); not recommended for load dump | Select when space-constrained layouts require SMA package and surge threat level is ≤400 W |
| SMCJ43CA-M3/57T | Bidirectional version; identical VWM, VBR, and PPPM, but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) where polarity reversal occurs | Choose for bidirectional protection needs; note that cathode band marking is omitted on bidirectional variants |
Compared with SMCJ43A-M3/57T, SMAJ43A-M3/57T offers footprint compatibility in smaller SMA packages but sacrifices 73% surge energy handling; SMCJ43CA-M3/57T retains full 1500 W capability and identical thermal performance but enables symmetrical clamping essential for differential or AC-signaled interfaces.
Availability
SMCJ43A-M3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC feeder safeguarding, and consumer USB port surge mitigation requiring stable component supply across production lifecycles.
Supply support for SMCJ43A-M3/57T 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-grade qualification.
The SMCJ series was engineered specifically for high-power transient suppression in harsh environments - delivering consistent clamping performance across temperature, validated for AEC-Q101 and UL 497B compliance in automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMCJ43A-M3/57T under a 10/1000 μs surge?
The SMCJ43A-M3/57T has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88394, ensuring predictable voltage limiting during real-world transients. The SMCJ43A-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ43A-M3/57T suitable for automotive applications?
Yes - the SMCJ43A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and an AEC-Q101-qualified version is available under ordering codes like SMCJ43A-HM3_X. While the base SMCJ43A-M3/57T itself is commercial-grade, its thermal rating (TJ max = +150 °C), robust surge capability (1500 W), and UL 497B recognition make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails. Always verify qualification status via the specific ordering code.
How does the SMCJ43A-M3/57T differ from the bidirectional SMCJ43CA-M3/57T?
The SMCJ43A-M3/57T is unidirectional with a cathode band marking and conducts only in reverse breakdown; the SMCJ43CA-M3/57T is bidirectional, lacking polarity marking and clamping symmetrically in both directions. Both share identical VWM (43 V), VBR, PPPM (1500 W), and package. The SMCJ43A-M3/57T is used on DC rails with defined polarity; the SMCJ43CA-M3/57T is selected for AC-coupled or floating lines like RS-485 or Ethernet where voltage reversals occur.
What is the thermal resistance of the SMCJ43A-M3/57T, and how does it affect PCB layout?
The SMCJ43A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To achieve rated 1500 W pulse power, the datasheet mandates 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Reducing pad area increases RθJA, derating peak power - e.g., 50% pad area may reduce usable PPPM by ~30%. The SMCJ43A-M3/57T must be placed away from heat sources and adjacent thermal vias are recommended for sustained surge duty cycles.
Does the SMCJ43A-M3/57T have a specified junction capacitance?
No - junction capacitance (CJ) is not specified for the SMCJ43A-M3/57T in the official Vishay datasheet (Document Number 88394). Capacitance data is provided only for lower-voltage SMCJ variants (e.g., SMCJ5.0A through SMCJ24A) in Figure 4. For high-frequency signal line protection above 1 MHz, designers should select lower-capacitance TVS families (e.g., TPSMD or µClamp series) or validate CJ experimentally. The SMCJ43A-M3/57T remains optimal for power rail and low-speed analog protection where capacitance is non-critical.
SMCJ43A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 21.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ43A-M3/57T FAQ
1.How can I place an order for SMCJ43A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43A-M3/57T 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 SMCJ43A-M3/57T reliable?
The price and inventory of SMCJ43A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43A-M3/57T?
SMCJ43A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43A-M3/57T 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 SMCJ43A-M3/57T?
For technical support, including SMCJ43A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43A-M3/57T requirements.
6.How does Aetrix verify that SMCJ43A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43A-M3/57T 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 SMCJ43A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43A-M3/57T?
All SMCJ43A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43A-M3/57T, 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 SMCJ43A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ43A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43A-M3/57T 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 …
