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Vishay General Semiconductor - Diodes Division SMBJ43CAHM3_B/I
- Part No.:
- SMBJ43CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHM3_B/I.pdf
- Description:
- 600W,43V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,927
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Product details
Overview
SMBJ43CAHM3_B/I 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 a 43 V stand-off 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 - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching spikes.
For engineers reviewing the SMBJ43CAHM3_B/I datasheet, SMBJ43CAHM3_B/I pinout, SMBJ43CAHM3_B/I application, or SMBJ43CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, 69.4 V maximum clamping voltage at rated surge current, AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the SMB package supports high thermal dissipation (RθJA = 100 °C/W) under transient conditions.
The device meets MSL Level 1 per J-STD-020 with a 260 °C reflow peak, and its 150 °C maximum junction temperature enables reliable operation in automotive and industrial environments. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification - verified for repetitive surge duty cycles up to 0.01 %.
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 window for design margining |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamping voltage limiting stress on downstream ICs during 10/1000 µs transients |
| PPPM | 600 W - peak pulse power handling capacity under standardized surge waveform |
| IPPM | 8.6 A - maximum non-repetitive surge current supported at VC |
| TJ max. | +150 °C - enables use in under-hood automotive or high-ambient industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMT footprint compatible with automated assembly |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking required. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with 0.086" (2.18 mm) minimum lead length and 0.220" (5.59 mm) maximum body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative transients and positive surges relative to cathode reference |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive transients and negative surges relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Halogen-free & RoHS | Meets environmental compliance requirements for modern industrial and consumer electronics manufacturing |
| 600 W 10/1000 µs rating | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) |
| MSL Level 1 | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture sensitivity risk |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing lines in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across MOSFET gate-source or op-amp input pins. Use Value: Limits voltage excursions to ≤69.4 V during 8.6 A surges, preventing latch-up or oxide breakdown in precision analog front-ends. | Use Scenario: Shielding CAN/LIN bus transceivers and temperature/pressure sensors in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential signal pairs or supply rails near connectors. Use Value: Maintains signal integrity during load-dump or jump-start events by clamping bidirectionally without polarity constraints. |
| Industrial PLC I/O Modules | Consumer Appliance Control Boards |
Use Scenario: Safeguarding digital input circuits receiving signals from external switches, relays, or proximity sensors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels subject to field wiring transients. Use Value: Withstands repeated 600 W surges while holding clamped voltage below 70 V, preserving microcontroller GPIO integrity. | Use Scenario: Protecting microcontroller reset lines, button inputs, and display backlight drivers in washing machines or HVAC controllers. IC Role / Device Role / Timing Role: Low-profile TVS mounted directly at board-level connectors and user interface points. Use Value: Halogen-free HM3 construction satisfies regional environmental mandates without compromising 69.4 V clamping performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CAHE3_B/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls where automotive qualification is unnecessary | Select when halogen-free content or automotive reliability validation is not required |
| SMBJ43CAHM3_B/H | Same electrical specs and AEC-Q101/halogen-free status, but supplied in 7" tape (750 pcs/reel) instead of 13" | Preferred for low-volume prototyping or small-batch production runs | Select when smaller reel size aligns with SMT line changeover frequency or inventory turnover goals |
Compared with SMBJ43CAHM3_B/I, the HE3 variant trades halogen-free content and automotive qualification for lower cost in commercial applications, while the HM3_B/H offers identical performance in a smaller reel format - enabling flexibility in procurement scale and compliance tier without redesign.
Availability
SMBJ43CAHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and PLC I/O modules requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ43CAHM3_B/I 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 performance.
The SMBJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial automation, and telecom infrastructure where repeatable clamping and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMBJ43CAHM3_B/I?
The "CA" suffix in SMBJ43CAHM3_B/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMBJ43A), SMBJ43CAHM3_B/I has no cathode marking and delivers identical VBR, VC, and IPPM characteristics regardless of voltage polarity - essential for protecting AC-coupled or floating signal paths where polarity reversal may occur.
Is SMBJ43CAHM3_B/I qualified for automotive applications?
Yes, SMBJ43CAHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure: the "HM3" suffix combines halogen-free, RoHS-compliant construction with AEC-Q101 validation. This qualification covers stress tests including temperature cycling, high-temperature operating life, and surge endurance - making SMBJ43CAHM3_B/I suitable for engine control units, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.
What is the maximum clamping voltage of SMBJ43CAHM3_B/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ43CAHM3_B/I is 69.4 V at its rated peak pulse current (IPPM) of 8.6 A, measured using the standard 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring sensitive components like microcontrollers or transceivers remain within safe operating limits when SMBJ43CAHM3_B/I is correctly applied with recommended PCB layout.
How does the HM3 suffix differ from E3 or HE3 in SMBJ43CAHM3_B/I?
The HM3 suffix in SMBJ43CAHM3_B/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS only, commercial grade), HE3 (RoHS + AEC-Q101, but not halogen-free), and M3 (halogen-free + RoHS, commercial grade). This makes SMBJ43CAHM3_B/I the only variant meeting all three criteria: environmental compliance, automotive reliability, and material safety - critical for Tier 1 automotive suppliers and regulated industrial OEMs.
What PCB layout guidance applies to SMBJ43CAHM3_B/I for optimal surge performance?
For optimal surge performance, SMBJ43CAHM3_B/I must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curves. Minimizing trace inductance between the TVS and protected node is essential - place SMBJ43CAHM3_B/I as close as possible to the connector or IC pin being protected, with short, wide traces and direct ground connections to reduce impedance. Avoid routing other signals near the TVS path to prevent coupling during clamping events.
SMBJ43CAHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_B/I FAQ
1.How can I place an order for SMBJ43CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHM3_B/I 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_B/I reliable?
The price and inventory of SMBJ43CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHM3_B/I?
SMBJ43CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHM3_B/I 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_B/I?
For technical support, including SMBJ43CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ43CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHM3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHM3_B/I?
All SMBJ43CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHM3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for SMBJ43CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHM3_B/I Tags
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