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Vishay General Semiconductor - Diodes Division SMBJ43CAHM3/H
- Part No.:
- SMBJ43CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHM3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
SMBJ43CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ43CAHM3/H datasheet, SMBJ43CAHM3/H pinout, SMBJ43CAHM3/H application, or SMBJ43CAHM3/H equivalent, this part serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for bidirectional transient suppression where precise clamping, low leakage (<1.0 μA at VWM), and MSL Level 1 moisture sensitivity are required.
Technical Context
This device operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1.0 ns), while the low incremental surge resistance supports consistent clamping under repetitive surge events.
The SMBJ43CAHM3/H is rated for -55 °C to +150 °C operating junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.057 %/°C temperature coefficient of VBR ensures predictable voltage drift across temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 47.8 V / 52.8 V at 1.0 mA test current - guaranteed breakdown window defining turn-on threshold |
| VC @ IPPM | 69.4 V at 8.6 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 600 W - peak transient energy absorption capacity per single 10/1000 μs pulse |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive or industrial ambient environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm max length and 2.20 mm max height |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (one direction) | Accepts positive-going surge relative to cathode; symmetrical with cathode in bidirectional mode |
| Cathode | Transient current entry (opposite direction) | Accepts negative-going surge relative to anode; functionally identical to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without external polarity management |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without baking - simplifies SMT manufacturing |
| AEC-Q101 qualification | Validated for automotive electronics including infotainment, body control, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and JEDEC J-STD-203 |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of encoder feedback lines and gate driver inputs against switching-induced transients in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector or IC input pins. Use Value: Limits induced spikes to ≤69.4 V, preventing latch-up or damage to 3.3 V/5 V interface ICs and isolated gate drivers. |
Use Scenario: Shielding CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary transient suppressor on signal lines between sensor harness and microcontroller ADC or transceiver. Use Value: Maintains signal fidelity with <1.0 μA leakage at 43 V, ensuring minimal offset error in precision analog front-ends. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Safeguarding 48 V PoE-powered Ethernet PHYs and DC-DC controllers from lightning-induced surges on data/power pairs. IC Role / Device Role / Timing Role: Secondary-level TVS on secondary-side DC rails and data line terminations. Use Value: Clamps 10/1000 μs transients to 69.4 V within nanoseconds, preserving PHY integrity during field-deployed surge events. |
Use Scenario: Bidirectional overvoltage protection on USB-C CC, SBU, and VCONN lines exposed to ESD and hot-plug transients. IC Role / Device Role / Timing Role: Fast-response clamping device placed adjacent to USB-C receptacle, before ESD diode arrays. Use Value: Provides 600 W surge margin beyond IEC 61000-4-2 ESD (±15 kV air), reducing need for multi-stage protection schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable where halogen content is unrestricted (e.g., commercial-grade telecom infrastructure) | Select SMBJ43CAHE3/H if halogen-free requirement is waived and cost optimization is prioritized |
| SMAJ43CAHM3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (140 °C/W) | Limited to lower-energy transients and less thermally demanding layouts | Choose SMAJ43CAHM3 only for space-constrained designs with verified thermal margin below 400 W |
Compared with SMBJ43CAHE3/H, the SMBJ43CAHM3/H adds halogen-free compliance without sacrificing clamping performance or qualification status; versus SMAJ43CAHM3, it delivers 50 % higher surge power handling and superior thermal dissipation in the same footprint family.
Availability
SMBJ43CAHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feeds requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ43CAHM3/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 reliability and application-specific validation.
The SMBJ series targets robust transient suppression in harsh environments, engineered for automotive, industrial, and telecom systems where AEC-Q101 qualification, MSL Level 1, and repeatable clamping are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ43CAHM3/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ43CAHM3/H provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., SMBJ43AHM3/H), it has no cathode band marking and functions identically in either polarity - essential for protecting AC-coupled or differential signal paths without polarity constraints.
Is SMBJ43CAHM3/H qualified for automotive use?
Yes, SMBJ43CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HM3" suffix with AEC-Q101 grade). This qualification validates its reliability for automotive applications including engine control units, body electronics, and ADAS sensor modules operating from -55 °C to +150 °C junction temperature.
What is the maximum clamping voltage of SMBJ43CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ43CAHM3/H is 69.4 V at 8.6 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the HM3 suffix differ from E3 or M3 in SMBJ43CAHM3/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. In contrast, "E3" is RoHS-compliant but not halogen-free, and "M3" is halogen-free and RoHS-compliant but lacks AEC-Q101 qualification. SMBJ43CAHM3/H meets all three criteria, making it suitable for automotive and green-electronics applications.
Can SMBJ43CAHM3/H be used in place of a unidirectional TVS like SMBJ43AHM3/H?
No - SMBJ43CAHM3/H is bidirectional and lacks polarity marking, whereas SMBJ43AHM3/H is unidirectional with a cathode band. Substituting SMBJ43CAHM3/H for SMBJ43AHM3/H may cause improper clamping in DC-biased circuits. Use SMBJ43CAHM3/H only where bidirectional protection is explicitly required and validated in the target circuit topology.
SMBJ43CAHM3/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:
- -
- 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:
- 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)
SMBJ43CAHM3/H FAQ
1.How can I place an order for SMBJ43CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHM3/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 SMBJ43CAHM3/H reliable?
The price and inventory of SMBJ43CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHM3/H?
SMBJ43CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHM3/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 SMBJ43CAHM3/H?
For technical support, including SMBJ43CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHM3/H requirements.
6.How does Aetrix verify that SMBJ43CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHM3/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 SMBJ43CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHM3/H?
All SMBJ43CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHM3/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 SMBJ43CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ43CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHM3/H Tags
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