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Vishay General Semiconductor - Diodes Division SMBJ43CAHE3_A/H
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- Part No.:
- SMBJ43CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHE3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
SMBJ43CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection on signal and power lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR at 1 mA), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ43CAHE3_A/H datasheet, SMBJ43CAHE3_A/H pinout, SMBJ43CAHE3_A/H application, or SMBJ43CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), low leakage (<1 µA at VWM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream ICs. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity dependency.
Designed for fast response (<1 ns), it handles repetitive 10/1000 µs surges at 0.01% duty cycle and meets UL 497B recognition (QVGQ2). The glass-passivated junction and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance standards.
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 window |
| VC @ IPPM | 69.4 V at 8.6 A - clamping voltage limiting protected circuit stress during 10/1000 µs transients |
| PPPM | 600 W - peak pulse power handling capacity per single 10/1000 µs surge event |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserving signal integrity in high-impedance lines |
| TJ max | +150 °C - maximum junction temperature enabling operation in harsh industrial environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm copper pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical dual-terminal construction with cathode/anode terminals functionally interchangeable in AC-coupled applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity - no fixed polarity assignment |
| Terminal 2 | Cathode / Anode (bidirectional) | Complementary terminal completing symmetrical clamping path - identical electrical behavior to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A108 |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 5.0 mm × 5.0 mm copper pads |
| Low clamping ratio (VC/VBR) | 1.45 typical - minimizes voltage overshoot across protected ICs during fast transients |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - compatible with standard reflow profiles up to 260 °C peak |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules exposed to relay coil switching transients. IC Role / Device Role / Timing Role: Shunt TVS device placed directly at connector entry point to clamp induced spikes before reaching ADC input or op-amp buffer. Use Value: Limits transient voltage to ≤69.4 V, preventing latch-up or gate oxide damage in 3.3 V/5 V signal chain components. | Use Scenario: Safeguarding RS-485 transceiver inputs in base station remote radio units subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential bus lines, absorbing common-mode and differential-mode transients simultaneously. Use Value: Maintains signal integrity during 10/1000 µs surges up to 8.6 A while adding <0.5 pF capacitance to preserve data rates up to 25 Mbps. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding LIN bus communication lines in door module ECUs against load dump and ISO 7637-2 pulse 5a/b events. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS placed adjacent to LIN transceiver IC to absorb repetitive 100 V/50 ms transients. Use Value: Enables compliance with automotive EMC requirements without derating - stable performance across -40 °C to +125 °C ambient. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in smart washing machines where brush arcing generates 100–500 V spikes. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) shunt suppressor on motor control signal lines to prevent false triggering or reset events. Use Value: Eliminates need for external RC snubbers by clamping sub-100 ns spikes to safe levels while consuming negligible quiescent power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference - differs only in material composition and packaging tape/reel format | Select when halogen-free compliance is required per IPC-1752A or customer sustainability mandates |
| SMCJ43CAHE3_A/H | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating | Higher power handling supports longer-duration surges (e.g., IEC 61000-4-4 EFT bursts) but requires larger PCB area | Choose when system-level surge testing exceeds 600 W capability or when board layout allows larger footprint |
Compared with SMBJ43CA-M3/52, SMBJ43CAHE3_A/H offers identical protection performance with standard RoHS compliance; versus SMCJ43CAHE3_A/H, it trades 40% lower peak power for 35% smaller PCB footprint - optimal for space-constrained industrial controllers.
Availability
SMBJ43CAHE3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance motor drive circuits requiring stable component supply and AEC-Q101-qualified reliability.
Supply support for SMBJ43CAHE3_A/H 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 high-reliability, automotive-qualified, and industry-standard solutions.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where repeatable clamping performance and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMBJ43CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration: SMBJ43CAHE3_A/H provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional variants (e.g., SMBJ43A), it has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals - essential for AC-coupled or differential signal lines.
Is SMBJ43CAHE3_A/H qualified for automotive applications?
Yes, SMBJ43CAHE3_A/H is AEC-Q101 qualified, verified per stress test conditions including HTGB, H3TRB, and temperature cycling. Its HE3 suffix explicitly indicates RoHS-compliant and AEC-Q101-qualified status, making it suitable for automotive body electronics, infotainment interfaces, and powertrain subsystems where reliability under thermal and mechanical stress is mandatory.
What is the maximum clamping voltage of SMBJ43CAHE3_A/H and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ43CAHE3_A/H is 69.4 V, measured at the peak pulse current (IPPM) of 8.6 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the thermal resistance of SMBJ43CAHE3_A/H affect PCB layout?
SMBJ43CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under full 600 W pulse loading, designers must ensure adequate copper area and avoid excessive trace length - undersized pads increase thermal impedance and risk thermal runaway during repetitive surges.
Can SMBJ43CAHE3_A/H replace SMBJ43A in an existing design?
No - SMBJ43CAHE3_A/H is bidirectional while SMBJ43A is unidirectional; they are not functionally interchangeable without circuit review. SMBJ43A includes a cathode band and conducts only in reverse bias, whereas SMBJ43CAHE3_A/H clamps symmetrically in both directions. Substitution requires verifying that bidirectional behavior won't cause unintended conduction in DC-biased paths or violate system-level polarity assumptions.
SMBJ43CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 8.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ43CAHE3_A/H FAQ
1.How can I place an order for SMBJ43CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHE3_A/H 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 SMBJ43CAHE3_A/H reliable?
The price and inventory of SMBJ43CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHE3_A/H?
SMBJ43CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHE3_A/H 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 SMBJ43CAHE3_A/H?
For technical support, including SMBJ43CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ43CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHE3_A/H 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 SMBJ43CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHE3_A/H?
All SMBJ43CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHE3_A/H, 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 SMBJ43CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ43CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHE3_A/H Tags
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