My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ43CAHE3/9AT
- Part No.:
- SMCJ43CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CAHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ43CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features a 43 V standoff voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ43CAHE3/9AT datasheet, SMCJ43CAHE3/9AT pinout, SMCJ43CAHE3/9AT application, or SMCJ43CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ43CAHE3/9AT implements a glass-passivated silicon avalanche junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bidirectional structure ensures symmetrical clamping in both polarities without polarity marking, meeting ANSI/IEEE C62.35 standards for surge suppression.
Thermally, it sustains 150 °C maximum junction temperature with derated pulse capability above 25 °C ambient, and achieves 75 °C/W junction-to-ambient thermal resistance on standard PCB layout - enabling robust operation in under-hood automotive environments and industrial control cabinets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–42 V nominal systems. |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - Verified breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamping voltage during 10/1000 μs surge; limits downstream IC stress to <70 V under worst-case 1500 W transient. |
| PPPM | 1500 W - Peak pulse power handling per single transient; supports IEC 61000-4-5 Level 4 (4 kV line-to-line) compliance with margin. |
| ID @ VWM | 1.0 μA - Reverse leakage at rated standoff; negligible power loss in battery-powered or high-impedance sensor circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables use in AEC-Q101-qualified automotive powertrain and chassis modules. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; allows efficient heat transfer to PCB copper pads without external heatsink. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); polarity unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge energy into device during negative polarity transients; symmetric with cathode for full bidirectional protection. |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge energy into device during positive polarity transients; no band marking distinguishes bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS sensor, and infotainment power rails. |
| 1500 W peak pulse rating | Withstands 10/1000 μs surges up to 21.6 A without degradation - sufficient for ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 combination wave testing. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to protected ICs; e.g., clamps 43 V system to ≤69.4 V - critical for 75 V-rated CAN transceivers and microcontrollers. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirement for high-volume SMT assembly. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics over lifetime; prevents parameter drift in humid or chemically aggressive under-hood environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control units against load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor line and ground, responding within picoseconds to transients exceeding 43 V. Use Value: Limits voltage seen by 5 V or 12 V sensor signal conditioning ICs to ≤69.4 V, preventing latch-up or gate oxide damage during 1500 W surges. |
Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary surge shunt on 24 V DC input terminals, absorbing repetitive 10/1000 μs transients from relay coil back-EMF and motor drive noise. Use Value: Maintains functional safety integrity by clamping transients before they reach optocoupler input stages - verified per IEC 61000-4-4/5 immunity requirements. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHY interface circuitry on base station equipment exposed to lightning-induced surges on PoE data lines. IC Role / Device Role / Timing Role: Secondary-level TVS mounted adjacent to RJ45 connector, clamping common-mode transients between differential pairs and chassis ground. Use Value: Provides 1500 W surge handling with <1.5 pF junction capacitance (typ.) - preserves signal integrity up to 100 MHz while meeting GR-1089-CORE telecom surge standards. |
Use Scenario: Protecting USB-C PD and 5 V/12 V output rails of wall-mounted AC/DC adapters against mains-borne surges and ESD events. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp on secondary-side DC output, activated only during abnormal line conditions beyond regulation tolerance. Use Value: Prevents catastrophic failure of downstream USB port controllers or charging ICs by limiting output overshoot to ≤69.4 V during 1 kV/0.5 J surges. |
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-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (120 °C/W) | Suitable for space-constrained consumer electronics but insufficient for automotive load dump or industrial 1500 W requirements | Select SMCJ43CAHE3/9AT when 1500 W surge rating, AEC-Q101 qualification, or thermal performance on 8 mm² pads is mandatory. |
| 1.5KE43CA | Through-hole TO-218 package, same electrical specs but incompatible with SMT assembly and higher profile | Used in legacy power supplies and test equipment where manual assembly or high-voltage creepage is prioritized over board density | Choose SMCJ43CAHE3/9AT for automated manufacturing, reduced board footprint, and compliance with modern automotive SMT standards. |
Compared with SMAJ43CA-E3/61T and 1.5KE43CA, the SMCJ43CAHE3/9AT uniquely delivers AEC-Q101 qualification, 1500 W surge capacity in SMC package, and thermal performance validated for automotive under-hood deployment - making it the only option meeting all three criteria simultaneously.
Availability
SMCJ43CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter outputs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ43CAHE3/9AT 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 and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 1500 W surge handling are mandatory.
FAQ
What is the clamping voltage of the SMCJ43CAHE3/9AT under a 10/1000 μs surge?
The SMCJ43CAHE3/9AT has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current (IPPM) for a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The clamping behavior is symmetrical in both directions due to its bidirectional construction, ensuring consistent protection regardless of transient polarity.
Is the SMCJ43CAHE3/9AT qualified for automotive applications?
Yes, the SMCJ43CAHE3/9AT is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for engine control units, ADAS sensors, and body electronics. The device operates reliably from –55 °C to +150 °C junction temperature, meeting automotive under-hood environmental requirements.
How does the SMCJ43CAHE3/9AT differ from unidirectional versions like SMCJ43AHE3/9AT?
The SMCJ43CAHE3/9AT is bidirectional with symmetrical breakdown and clamping in both polarities, while SMCJ43AHE3/9AT is unidirectional and features a cathode band marking. Electrically, the bidirectional version has identical VWM (43 V), VBR (47.8–52.8 V), and VC (69.4 V) ratings but supports AC-coupled or floating signal lines where polarity reversal may occur - such as in RS-485, CAN FD, or Ethernet PHY interfaces.
What is the thermal resistance and recommended pad layout for the SMCJ43CAHE3/9AT?
The SMCJ43CAHE3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Vishay specifies this pad layout in Document Number 88394 to ensure rated 1500 W pulse power dissipation and prevent thermal runaway during repetitive surge events.
Does the SMCJ43CAHE3/9AT have polarity markings on the package?
No, the SMCJ43CAHE3/9AT does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCJ43AHE3/9AT) that use a cathode band, the CA version relies on symmetrical internal structure - eliminating need for orientation during placement. This simplifies automated assembly and avoids misorientation risk in AC or differential signal paths.
SMCJ43CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ43CAHE3/9AT FAQ
1.How can I place an order for SMCJ43CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CAHE3/9AT 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 SMCJ43CAHE3/9AT reliable?
The price and inventory of SMCJ43CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ43CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CAHE3/9AT?
SMCJ43CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CAHE3/9AT 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 SMCJ43CAHE3/9AT?
For technical support, including SMCJ43CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ43CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ43CAHE3/9AT 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 SMCJ43CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ43CAHE3/9AT?
All SMCJ43CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CAHE3/9AT, 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 SMCJ43CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ43CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CAHE3/9AT 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 …
