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Vishay General Semiconductor - Diodes Division SMBJ43CAHE3/5B
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- Part No.:
- SMBJ43CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHE3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
SMBJ43CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤69.4 V at 8.6 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ43CAHE3/5B datasheet, SMBJ43CAHE3/5B pinout, SMBJ43CAHE3/5B application, or SMBJ43CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This device operates as a voltage-clamping transient suppressor using an avalanche diode structure. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity sensitivity, and its glass-passivated junction ensures stable breakdown characteristics under repetitive surge stress.
The SMBJ43CAHE3/5B is rated for 600 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with derating above 25 °C per Fig. 2. It meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and carries UL recognition QVGQ2 (E136766) for both uni- and bidirectional configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–48 V nominal systems |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - guaranteed breakdown window ensuring predictable turn-on during overvoltage events |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamped voltage during full-rated 600 W transient, limiting downstream IC stress |
| PPPM | 600 W - peak pulse power handling per standard 10/1000 µs waveform; validates robustness against lightning-induced surges |
| TJ max. | +150 °C - maximum junction temperature enabling operation in high-ambient industrial environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm copper pads; informs heatsinking requirements |
| UL Recognition | QVGQ2 (E136766) - Underwriters Laboratories listing for surge protectors, supporting safety certification of end equipment |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; symmetric conduction path relative to cathode |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance clamp path to ground or reference rail; identical functional role as anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for under-hood and ADAS sensor modules |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly laid out, reducing need for secondary protection stages |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for high-speed interfaces |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without dry-pack or baking; compatible with automated pick-and-place and reflow profiles up to 260 °C |
| UL 497B recognized | Supports end-equipment compliance with telecom and industrial safety standards without additional third-party testing |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting 4–20 mA current loop transmitters and RS-485 nodes from ESD and inductive switching spikes in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential bus lines or between signal and ground. Use Value: Limits transient voltage to ≤69.4 V during 8.6 A surges, preserving integrity of isolated signal conditioners and ADC front-ends. |
Use Scenario: Shielding Ethernet PHYs and DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of gas discharge tubes or polymer PTCs in hybrid protection circuits. Use Value: Responds in <1 ps to clamp 10/1000 µs transients, preventing latch-up in 2.5 V/3.3 V PHY ICs with tight VI/O margins. |
| Automotive Body Control Module | Consumer Power Adapter Input |
Use Scenario: Safeguarding LIN bus transceivers and LED driver inputs against load dump and jump-start voltage spikes in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector entry point, referenced to chassis ground. Use Value: AEC-Q101 qualification ensures survivability across −40 to +125 °C ambient, while 600 W rating handles ISO 7637-2 Pulse 5a/b energy. |
Use Scenario: Suppressing line-to-line and line-to-ground surges on AC-DC adapter primary-side rectifier outputs. IC Role / Device Role / Timing Role: Secondary clamping device after MOVs, absorbing residual high-frequency ringback energy. Use Value: Low clamping voltage (69.4 V) prevents overstress of 800 V-rated bridge rectifiers and improves overall surge pass/fail margin. |
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-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in circuit performance or layout; differs only in material composition for environmental compliance | Select when halogen-free BOM requirements apply per IPC-1752A or OEM green directives |
| SMAJ43CAHE3/A | Lower 400 W peak pulse power; SMA (DO-214AC) package with higher RθJA (140 °C/W) | Reduced surge handling margin; requires larger copper area or lower ambient for same thermal performance | Choose only if space-constrained layouts preclude SMB footprint and 400 W rating suffices for target threat level |
Compared with SMBJ43CAHE3/5B, the M3/5B alternative offers identical protection performance with halogen-free construction, while the SMAJ43CAHE3/A trades 33 % lower pulse power and inferior thermal dissipation for smaller board area - neither is pin-compatible due to differing package outlines (SMB vs. SMA).
Availability
SMBJ43CAHE3/5B is available at Aetrix Electronics and suitable for industrial sensor interface, telecom line protection, automotive body control module, and consumer power adapter input applications requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ43CAHE3/5B 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 optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is critical.
FAQ
What does the "CA" suffix indicate in SMBJ43CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration: SMBJ43CAHE3/5B conducts and clamps symmetrically in both polarities, making it suitable for AC signal lines, differential buses like RS-485, or ungrounded power rails. Unlike unidirectional "A" variants, it has no cathode band marking and exhibits matched VBR in either direction - confirmed in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of Vishay document 88392.
Is SMBJ43CAHE3/5B qualified for automotive use?
Yes, SMBJ43CAHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix per Vishay's ordering nomenclature. This qualification covers stress tests including HTGB, H3TRB, and surge endurance under temperature cycling, validating its suitability for automotive body electronics, infotainment interfaces, and ADAS sensor modules - explicitly noted in the Mechanical Data section of document 88392.
What is the maximum clamping voltage for SMBJ43CAHE3/5B at its rated surge current?
The maximum clamping voltage (VC) for SMBJ43CAHE3/5B is 69.4 V at 8.6 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (row SMBJ43A) of Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
How does the HE3 suffix differ from E3 or M3 in SMBJ43CAHE3/5B?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, whereas "E3" is RoHS-compliant commercial grade only, and "M3" adds halogen-free compliance. All three share identical electrical specs and SMB package, but only HE3 and HM3 variants meet automotive reliability requirements - confirmed in the Ordering Information and Mechanical Data sections of document 88392.
Can SMBJ43CAHE3/5B be used in place of a unidirectional TVS like SMBJ43AHE3/5B?
No - SMBJ43CAHE3/5B is electrically and physically incompatible with unidirectional variants. Its bidirectional structure lacks polarity marking and delivers symmetrical clamping, while SMBJ43AHE3/5B has a defined cathode band and only clamps in reverse bias. Substitution would compromise protection on DC-biased lines and violate design intent per Vishay's "Polarity" note in document 88392.
SMBJ43CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 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)
SMBJ43CAHE3/5B FAQ
1.How can I place an order for SMBJ43CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHE3/5B 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 SMBJ43CAHE3/5B reliable?
The price and inventory of SMBJ43CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHE3/5B?
SMBJ43CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHE3/5B 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 SMBJ43CAHE3/5B?
For technical support, including SMBJ43CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ43CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHE3/5B 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 SMBJ43CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHE3/5B?
All SMBJ43CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHE3/5B, 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 SMBJ43CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ43CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHE3/5B Tags
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