My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ43-E3/57T
- Part No.:
- SMCJ43-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,785
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ43-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR), 69.4 V clamping voltage at 21.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ43-E3/57T datasheet, SMCJ43-E3/57T pinout, SMCJ43-E3/57T application, or SMCJ43-E3/57T equivalent, this device is selected for high-energy surge immunity in automotive power supplies, industrial sensor interfaces, and DC-DC converter input protection where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
The SMCJ43-E3/57T operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
It is rated for 150 °C maximum junction temperature, 75 °C/W junction-to-ambient thermal resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The E3 suffix confirms RoHS compliance and JESD201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Tight 10.4% tolerance ensures predictable turn-on across production lots. |
| VC (Clamping Voltage) | 69.4 V at 21.6 A (10/1000 µs) - Limits downstream voltage stress during surge events. |
| PPPM (Peak Pulse Power) | 1500 W - Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in automotive systems. |
| ID (Reverse Leakage) | 1.0 µA max at 43 V - Negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
| TJ Max | 150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | DO-214AB (SMCJ) - Surface-mount footprint compatible with automated assembly; 8.0 mm × 8.0 mm copper pad layout recommended. |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads; cathode indicated by band on one end; terminals are anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; completes conduction loop during reverse-bias clamping. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +12 V rail); carries full surge current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability under thermal cycling and humidity stress. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ≈ 1.37) versus competing TVS devices, reducing voltage overshoot on protected ICs. |
| Glass passivated junction | Improves long-term stability of VBR and leakage under high-temperature/humidity bias conditions (e.g., 85 °C/85% RH). |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD22-B102; compatible with no-clean and water-soluble flux chemistries. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 12 V rail to ≤69.4 V during 1500 W surges, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding 4–20 mA current-loop sensor inputs from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: TVS connected across sensor input terminals to divert fast transients before they reach op-amp front-end. Use Value: Sub-1 ns response time and 1.0 µA leakage preserve analog accuracy while surviving ±15 kV contact ESD per IEC 61000-4-2. |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
|
Use Scenario: Safeguarding isolated flyback or buck converter inputs in PoE-powered equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-side TVS placed upstream of input filter capacitor and rectifier bridge. Use Value: 1500 W PPPM rating handles multi-pulse surge events defined in IEC 61000-4-5 (10/700 µs), maintaining regulation integrity. |
Use Scenario: Front-end protection of -48 V telecom rectifier outputs against induced surges from nearby AC mains switching. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at rectifier output terminals to clamp negative-going transients. Use Value: 43 V VWM allows use on -48 V systems with sufficient margin; 69.4 V VC prevents latch-up in downstream hot-swap controllers. |
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-E3/5AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR/VC. | Not suitable for automotive load dump; limited to low-energy ESD and inductive spikes in space-constrained consumer PCBs. | Select SMCJ43-E3/57T when 1500 W surge handling and AEC-Q101 qualification are mandatory. |
| SMCJ43AHE3/57T | Identical electrical specs and package, but HE3 suffix denotes AEC-Q101 qualification (vs. E3's commercial grade); same 1500 W PPPM and 69.4 V VC. | No functional difference in circuit behavior; HE3 version undergoes extended automotive qualification testing (e.g., HTOL, TC, UHAST). | Choose SMCJ43-E3/57T for cost-sensitive industrial designs; choose SMCJ43AHE3/57T for automotive OEM programs requiring full AEC-Q101 documentation. |
Compared with SMAJ43A-E3/5AT and SMCJ43AHE3/57T, the SMCJ43-E3/57T delivers optimal balance of high-power surge capability, industrial-grade reliability, and surface-mount manufacturability-making it the preferred choice for 12–48 V DC systems requiring robust, standardized TVS protection without automotive certification overhead.
Availability
SMCJ43-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom power supply protection requiring stable component supply and consistent surge performance across production batches.
Supply support for SMCJ43-E3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where failure modes must be mitigated without compromising signal integrity or thermal stability.
FAQ
What is the clamping voltage of the SMCJ43-E3/57T at its rated peak pulse current?
The SMCJ43-E3/57T has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on the protected circuit during surge events. The SMCJ43-E3/57T maintains this clamping performance across its specified operating temperature range.
Is the SMCJ43-E3/57T suitable for automotive applications?
The SMCJ43-E3/57T is RoHS-compliant and manufactured to Vishay's commercial-grade specifications (E3 suffix). While it shares the same DO-214AB package and electrical characteristics as AEC-Q101-qualified variants like SMCJ43AHE3/57T, the SMCJ43-E3/57T itself is not AEC-Q101 certified. For automotive use, confirm qualification status with Vishay documentation or select the HE3-suffixed part. The SMCJ43-E3/57T remains appropriate for industrial and telecom applications requiring high-surge capability.
What does the "57T" in SMCJ43-E3/57T indicate?
The "57T" suffix in SMCJ43-E3/57T specifies the packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format supports automated pick-and-place assembly. The "E3" denotes RoHS compliance and JESD201 Class 1A whisker resistance. Together, SMCJ43-E3/57T identifies a fully traceable, surface-mount-ready TVS diode optimized for high-volume manufacturing.
How does the SMCJ43-E3/57T differ from bi-directional SMCJ43CA variants?
The SMCJ43-E3/57T is unidirectional, meaning it conducts only in reverse bias and requires correct polarity installation (cathode toward protected line). In contrast, SMCJ43CA is bi-directional, functioning identically in both directions with no polarity marking. The SMCJ43-E3/57T offers lower leakage and slightly tighter VBR tolerance than its CA counterpart, making it preferable for DC rail protection where polarity is fixed and leakage sensitivity matters.
What thermal derating applies to the SMCJ43-E3/57T above 25 °C ambient?
The SMCJ43-E3/57T exhibits linear thermal derating above TA = 25 °C, per Figure 2 in Vishay document 88394. Its 1500 W peak pulse power rating decreases by approximately 1.2% per °C rise, reaching ~6.5 W steady-state power dissipation at TA = 50 °C. Effective heat sinking via 8.0 mm × 8.0 mm copper pads per terminal is critical to maintain performance; junction-to-ambient thermal resistance is 75 °C/W under those conditions.
SMCJ43-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- 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 (SMCJ)
SMCJ43-E3/57T FAQ
1.How can I place an order for SMCJ43-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43-E3/57T 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 SMCJ43-E3/57T reliable?
The price and inventory of SMCJ43-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43-E3/57T?
SMCJ43-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43-E3/57T 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 SMCJ43-E3/57T?
For technical support, including SMCJ43-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43-E3/57T requirements.
6.How does Aetrix verify that SMCJ43-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43-E3/57T 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 SMCJ43-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43-E3/57T?
All SMCJ43-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43-E3/57T, 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 SMCJ43-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ43-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43-E3/57T 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 …
