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Vishay General Semiconductor - Diodes Division SMBJ43AHM3/H
- Part No.:
- SMBJ43AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHM3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,667
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Product details
Overview
SMBJ43AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (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.
For engineers reviewing the SMBJ43AHM3/H datasheet, SMBJ43AHM3/H pinout, SMBJ43AHM3/H application, or SMBJ43AHM3/H equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in industrial control systems, automotive ECUs, and telecom interface circuits where fast response (<1 ps), low clamping ratio, and AEC-Q101 qualification are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive surge conditions. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–55 °C to +150 °C) support reliable operation in compact PCB layouts with minimal copper pad area (0.2" × 0.2").
The SMBJ43AHM3/H delivers 600 W peak pulse power per 10/1000 µs waveform at 25 °C, derating linearly above TA = 25 °C per Figure 2, and maintains ≤1.0 µA reverse leakage at VWM, ensuring minimal standby power loss in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail protection threshold. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Ensures consistent avalanche initiation across production lots and temperature. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to <70 V. |
| PPPM | 600 W - Peak transient energy absorption capability; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables handling of accidental reverse-polarity events. |
| Junction Temp | –55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1 (JEDEC J-STD-020), RoHS-compliant and halogen-free (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge events. |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 43 V rail); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 4 kV surge tests on 50 Ω source impedance. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage stress on downstream MOSFETs or ICs during clamping, improving system reliability. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 42 V battery-supplied microcontrollers and CAN transceivers in start-stop systems against load dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND, responding within <1 ps to limit voltage overshoot. Use Value: Prevents latch-up or permanent damage to 48 V-rated MCUs by clamping transients to ≤69.4 V while sustaining 600 W surge energy. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Standoff protection element on field-side signal lines, conducting only during >43 V transients. Use Value: Maintains <1 µA leakage at 24 V nominal, eliminating false triggering while clamping 1 kV/500 A surges to safe levels. |
| Telecom Interface Surge Suppression | Consumer Power Adapter Output Protection |
|
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or MOV stages. Use Value: Fast response and low VC ensure signal integrity is preserved during surge events without data corruption. |
Use Scenario: Securing the 43 V output of USB-PD 3.1 extended power range (EPR) adapters against output short-circuit transients. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp on regulated DC output, placed after DC-DC converter and filter. Use Value: Halogen-free HM3 construction meets IEC 62368-1 flammability and environmental compliance for end-user devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and SMB package. | Suitable for commercial-grade industrial or computing applications where automotive qualification is unnecessary. | Select SMBJ43AHE3/H for cost-sensitive non-automotive designs requiring identical clamping performance. |
| SMAJ43AHE3/A | Lower 400 W PPPM; SMA (DO-214AC) package (smaller footprint, higher RθJA = 140 °C/W); same VWM/VBR. | Used where board space is constrained and surge energy is limited to ≤400 W (e.g., low-power IoT sensors). | Choose SMAJ43AHE3/A only if layout space is critical and full 600 W surge immunity is not required. |
Compared with SMBJ43AHE3/H and SMAJ43AHE3/A, the SMBJ43AHM3/H provides halogen-free construction and AEC-Q101 validation-critical for automotive Tier-1 suppliers-while maintaining identical clamping performance and SMB footprint compatibility.
Availability
SMBJ43AHM3/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and telecom interface surge protection requiring stable component supply, long-lifecycle assurance, and traceable halogen-free sourcing.
Supply support for SMBJ43AHM3/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMBJ series is engineered for robust transient suppression in harsh environments, with emphasis on AEC-Q101 qualification, stable clamping, and automated manufacturability in surface-mount packages.
FAQ
What is the clamping voltage of SMBJ43AHM3/H at its rated peak pulse current?
The SMBJ43AHM3/H has a maximum clamping voltage (VC) of 69.4 V at 8.6 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during surge events. The SMBJ43AHM3/H maintains this clamping performance across its specified operating temperature range.
Is SMBJ43AHM3/H suitable for automotive applications?
Yes, SMBJ43AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via the HM3 suffix. It meets stringent reliability requirements for under-hood and chassis-mounted electronics, including thermal cycling, humidity resistance, and surge endurance. The SMBJ43AHM3/H is commonly deployed in engine control units, body control modules, and ADAS camera power supplies.
How does the HM3 suffix differ from the HE3 suffix in SMBJ43A variants?
The HM3 suffix indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 denotes RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both share identical electrical specifications and SMB package dimensions, but SMBJ43AHM3/H satisfies stricter environmental mandates for automotive and green electronics programs.
What is the reverse leakage current of SMBJ43AHM3/H at its stand-off voltage?
At VWM = 43 V and TA = 25 °C, the SMBJ43AHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensing nodes. The SMBJ43AHM3/H maintains this specification across its full operating temperature range.
Can SMBJ43AHM3/H be used in bidirectional protection circuits?
No, SMBJ43AHM3/H is a unidirectional TVS diode, identified by its cathode band marking. For bidirectional protection, Vishay specifies the CA-suffixed variant (e.g., SMBJ43CA). Using SMBJ43AHM3/H in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to suppress.
SMBJ43AHM3/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:
- 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):
- 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)
SMBJ43AHM3/H FAQ
1.How can I place an order for SMBJ43AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHM3/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 SMBJ43AHM3/H reliable?
The price and inventory of SMBJ43AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ43AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHM3/H?
SMBJ43AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHM3/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 SMBJ43AHM3/H?
For technical support, including SMBJ43AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHM3/H requirements.
6.How does Aetrix verify that SMBJ43AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHM3/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 SMBJ43AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ43AHM3/H?
All SMBJ43AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHM3/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 SMBJ43AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ43AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AHM3/H Tags
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