My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ43AHE3/57T
- Part No.:
- SMCJ43AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHE3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ43AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) 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 at 1 mA), 69.4 V clamping voltage (VC) at 21.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial motor drives, and telecom power supplies.
For engineers reviewing the SMCJ43AHE3/57T datasheet, SMCJ43AHE3/57T pinout, SMCJ43AHE3/57T application, or SMCJ43AHE3/57T equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, 150 °C max junction temperature, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 43 V), then rapidly switches to low-impedance conduction when transients exceed VBR, clamping the protected line to ≤69.4 V. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMC package supports 200 A non-repetitive forward surge current (IFSM) and meets MSL level 1 reflow requirements (260 °C peak).
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation in thermally constrained automotive and industrial environments without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown threshold defining turn-on precision |
| VC @ IPPM | 69.4 V at 21.6 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting inductive load switching |
| TJ max | +150 °C - maximum junction temperature enabling under-hood automotive use |
| Leakage @ VWM | 1.0 µA - minimal standby power loss and signal integrity impact |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional clamping | Connected to protected line; conducts when line voltage exceeds VBR relative to anode |
| Anode (non-banded end) | Reference/ground return path | Typically tied to system ground or lower-potential rail; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter consistency across life cycle |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 compliance | Enables standard reflow assembly without moisture sensitivity concerns (260 °C peak) |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Supply |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontroller inputs and CAN transceiver power rails from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp absorbing >100 V transients within nanoseconds to prevent latch-up or gate oxide damage. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (load dump) due to 1500 W PPPM and 69.4 V clamping at 21.6 A. | Use Scenario: Safeguarding DC bus monitoring circuitry and gate drivers against inductive kickback from IGBT switching. IC Role / Device Role / Timing Role: Standby-mode protector placed across 48 V auxiliary supply, triggered only during fault events. Use Value: Limits voltage excursion to ≤69.4 V during 200 A IFSM surges, preserving ADC reference stability and optocoupler isolation integrity. |
| Telecom Base Station Power Input | Consumer Appliance Mainboard USB Port |
Use Scenario: Front-end protection of AC/DC converter primary-side control ICs against lightning-induced surges on -48 V telecom feeds. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of input filter capacitors and controller ICs. Use Value: Withstands 1500 W pulses while maintaining <1 µA leakage at 43 V, minimizing standby power loss in always-on systems. | Use Scenario: Reverse-polarity and ESD protection for 5 V USB VBUS line in smart home hubs and display controllers. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, blocking negative excursions and clamping positive spikes above 43 V. Use Value: Provides 69.4 V clamping with 1.0 µA leakage, ensuring USB enumeration reliability and preventing PHY damage during hot-plug events. |
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 | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not suitable for 1500 W load dump; limited to low-energy ESD/signal-line protection | Select when board space is critical and surge energy is ≤400 W |
| SMCJ43CAHE3/57T | Bidirectional variant; same VWM/VC but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal occurs | Choose for RS-485, Ethernet PHY, or sensor bridge applications needing bidirectional protection |
Compared with SMAJ43A-E3/61 and SMCJ43CAHE3/57T, the SMCJ43AHE3/57T delivers 3.75× higher surge power handling in the same SMC footprint and enables unidirectional DC rail protection without polarity ambiguity - making it optimal for automotive and industrial 12–48 V power domains.
Availability
SMCJ43AHE3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive power supplies, telecom base station inputs, and consumer appliance mainboards requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMCJ43AHE3/57T 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, efficiency, and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against load dump, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the SMCJ43AHE3/57T at its rated peak pulse current?
The SMCJ43AHE3/57T has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during a full-rated transient event and is confirmed in the Vishay datasheet Document Number 88394, page 2.
Is the SMCJ43AHE3/57T qualified for automotive applications?
Yes, the SMCJ43AHE3/57T is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive electronics such as ECUs and body control modules.
What does the "57T" suffix indicate in SMCJ43AHE3/57T?
The "57T" suffix denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format is optimized for high-volume automated SMT placement and is specified in the Vishay ordering information table (Document Number 88394, page 3).
How does the SMCJ43AHE3/57T differ from the bidirectional SMCJ43CAHE3/57T?
The SMCJ43AHE3/57T is unidirectional, with a cathode band marking and clamping action only for positive transients relative to ground. In contrast, SMCJ43CAHE3/57T is bidirectional, offering symmetrical clamping for both polarities - essential for AC signals or floating nodes. Both share identical VWM, VC, and PPPM, but differ in polarity behavior and marking.
What is the maximum operating junction temperature for the SMCJ43AHE3/57T?
The SMCJ43AHE3/57T has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Absolute Maximum Ratings table (Document Number 88394, page 2). This rating supports deployment in high-ambient environments such as engine compartments and enclosed industrial cabinets without derating below full power.
SMCJ43AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43AHE3/57T FAQ
1.How can I place an order for SMCJ43AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHE3/57T 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 SMCJ43AHE3/57T reliable?
The price and inventory of SMCJ43AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHE3/57T?
SMCJ43AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHE3/57T 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 SMCJ43AHE3/57T?
For technical support, including SMCJ43AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHE3/57T requirements.
6.How does Aetrix verify that SMCJ43AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHE3/57T 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 SMCJ43AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43AHE3/57T?
All SMCJ43AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHE3/57T, 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 SMCJ43AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ43AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHE3/57T 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 …
