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Vishay General Semiconductor - Diodes Division SMBJ43AHE3_B/H
- Part No.:
- SMBJ43AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHE3_B/H.pdf
- Description:
- 600W,43V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ43AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range at 1 mA, 69.4 V maximum clamping voltage at 8.6 A peak pulse current, and 600 W peak pulse power handling per 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ43AHE3_B/H datasheet, SMBJ43AHE3_B/H pinout, SMBJ43AHE3_B/H application, or SMBJ43AHE3_B/H equivalent, key selection criteria include its AEC-Q101 qualification status, unidirectional polarity with cathode band marking, low thermal resistance (RθJL = 20 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), enabling suppression of transients induced by inductive load switching and ESD events.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMBJ43AHE3_B/H supports automotive-grade reliability. It delivers 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and exhibits low incremental surge resistance for minimal voltage overshoot during high-current surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR @ IT = 1 mA | 47.8–52.8 V - Breakdown voltage range confirming reliable avalanche initiation across production lot. |
| VC @ IPPM = 8.6 A | 69.4 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power rating defining transient energy absorption capability without failure. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance enabling efficient heat transfer to PCB copper pads. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine), supporting inrush and fault-current tolerance. |
| TJ max. | +150 °C - Maximum junction temperature allowing operation in under-hood automotive environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode | Avalanche conduction node / Clamping output | Marked with band; connected to protected line (e.g., 43 V rail); conducts during overvoltage to clamp voltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring long-term reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 µs) | Enables protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events without derating in standard layouts. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across temperature and lifetime, critical for low-power sensor interfaces. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-induced damage or parametric shift. |
| UL 497B recognized (QVGQ2) | Meets safety requirements for telecom and industrial surge protectors, simplifying system-level certification. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protecting 43 V supply rail and CAN transceiver I/O lines from load dump and inductive kickback in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and ground, responding within picoseconds to suppress >100 V transients. Use Value: Limits voltage seen by MCU and transceiver to ≤69.4 V, preventing latch-up and gate oxide damage while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controller cards exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input optocoupler terminals to shunt transient energy before it reaches isolation barrier. Use Value: Withstands 600 W pulses without degradation, ensuring >100,000 surge cycles and eliminating need for external series impedance in Class I input designs. |
| Telecom Power Feeding Interface | Consumer Appliance Motor Drive Board |
|
Use Scenario: Protecting PoE-powered remote units' 43 V auxiliary supply from lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC bus, coordinated with upstream gas discharge tube for staged protection. Use Value: Low clamping voltage (69.4 V) prevents overvoltage stress on DC-DC controllers rated for 75 V max input, preserving efficiency and lifetime. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers on washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS mounted directly at connector or MOSFET source pin to minimize inductance and maximize clamping speed. Use Value: RθJL = 20 °C/W enables direct thermal coupling to copper pour, sustaining repeated 100 A surge events without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 programs). | Choose SMBJ43AHM3_B/H when halogen-free bill-of-materials is required; otherwise SMBJ43AHE3_B/H is fully interchangeable. |
| SMAJ43AHE3/A | Same VWM/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM = 400 W and higher RθJA = 140 °C/W. | Not suitable for 600 W surge environments; limited to space-constrained, lower-energy applications like USB port protection. | Select SMAJ43AHE3/A only if board area is critical and surge threat level is ≤400 W; SMBJ43AHE3_B/H remains preferred for full 600 W capability. |
Compared with SMBJ43AHM3_B/H, SMBJ43AHE3_B/H offers identical performance with standard RoHS compliance; versus SMAJ43AHE3/A, it provides 50% higher surge power handling and superior thermal dissipation - essential for industrial and automotive deployments demanding sustained reliability.
Availability
SMBJ43AHE3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, telecom power feeding interfaces, and consumer appliance motor drive boards requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ43AHE3_B/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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMBJ43AHE3_B/H at its rated peak pulse current?
The SMBJ43AHE3_B/H has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 8.6 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is guaranteed across the full operating temperature range. The SMBJ43AHE3_B/H maintains this clamping performance without degradation under repetitive surge conditions up to 0.01% duty cycle.
Is SMBJ43AHE3_B/H suitable for automotive applications?
Yes, SMBJ43AHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use, with ordering code suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It meets stringent requirements for thermal cycling, mechanical shock, and long-term reliability in under-hood and cabin environments. The SMBJ43AHE3_B/H is commonly deployed in body control modules, lighting drivers, and infotainment power supplies where load dump and jump-start transients occur.
How does the SMBJ43AHE3_B/H differ from bidirectional TVS diodes like SMBJ43CA?
The SMBJ43AHE3_B/H is unidirectional and features a cathode band marking, conducting only in reverse bias above VBR; it blocks forward current beyond ~3.5 V. In contrast, SMBJ43CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. SMBJ43AHE3_B/H is used where DC bias exists (e.g., 43 V supply rails), while SMBJ43CA suits AC-coupled or floating signal lines. Electrical parameters such as VC and PPPM are identical, but conduction behavior differs fundamentally.
What is the thermal resistance from junction to ambient for SMBJ43AHE3_B/H?
The SMBJ43AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - a layout defined in the Vishay datasheet. However, its much lower junction-to-lead resistance (RθJL = 20 °C/W) indicates superior heat transfer to PCB copper pours or thermal vias. For sustained surge duty, optimizing pad size and via count is essential to maintain TJ ≤ 150 °C, especially in enclosed automotive enclosures.
Does SMBJ43AHE3_B/H meet UL safety standards?
Yes, SMBJ43AHE3_B/H carries Underwriters Laboratories recognition under UL 497B (QVGQ2 file E136766) for surge protective components, covering both unidirectional and bidirectional variants in the SMBJ family. This certification validates its suitability in safety-critical telecom, industrial, and building automation systems where third-party verification of transient suppression performance and flammability (UL 94 V-0 molding compound) is mandatory. The SMBJ43AHE3_B/H is rated for use in primary and secondary circuits per UL 497B Annex D.
SMBJ43AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ43AHE3_B/H FAQ
1.How can I place an order for SMBJ43AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHE3_B/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 SMBJ43AHE3_B/H reliable?
The price and inventory of SMBJ43AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ43AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHE3_B/H?
SMBJ43AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHE3_B/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 SMBJ43AHE3_B/H?
For technical support, including SMBJ43AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ43AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHE3_B/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 SMBJ43AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ43AHE3_B/H?
All SMBJ43AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHE3_B/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 SMBJ43AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ43AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AHE3_B/H Tags
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