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Vishay General Semiconductor - Diodes Division SMBJ43CAHM3_A/H
- Part No.:
- SMBJ43CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHM3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,420
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Product details
Overview
SMBJ43CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR), 69.4 V clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ43CAHM3_A/H datasheet, SMBJ43CAHM3_A/H pinout, SMBJ43CAHM3_A/H application, or SMBJ43CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism to shunt surge energy away from protected circuitry. Its bidirectional symmetry enables use without polarity consideration across AC-coupled or differential signal paths, and its low incremental surge resistance ensures minimal voltage overshoot under fast-rising transients (e.g., ESD, inductive switching).
The SMBJ43CAHM3_A/H is rated for junction temperatures from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its glass-passivated junction and matte tin-plated leads comply with J-STD-002 solderability and JESD22-B102 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC signal rail margin. |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - guaranteed avalanche onset window; ensures consistent triggering across production lots. |
| VC @ IPPM | 69.4 V at 8.6 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - peak transient power handling capacity; supports IEC 61000-4-5 Level 4 surge immunity design. |
| ID @ VWM | 1.0 µA - reverse leakage at standoff voltage; negligible loading on high-impedance sensor or communication lines. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard PCB pad; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals accept either orientation in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction | Both terminals function identically; no cathode band marking - eliminates orientation errors during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe surges per IEC 61000-4-5, reducing need for cascaded protection stages. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ADAS sensor modules. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E; supports environmentally regulated industrial and medical product certifications. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns or baking requirements. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes let-through voltage during transients - critical for protecting 3.3 V or 5 V logic interfaces downstream. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in factory automation systems. IC Role / Device Role: Bidirectional TVS placed across differential pair or supply rail to clamp ±1 kV transients. Use Value: Prevents latch-up or permanent damage to precision ADCs and isolated signal conditioners operating at 24 V nominal rails. |
Use Scenario: Safeguarding LIN bus nodes and door module microcontrollers against battery line transients during jump-start or alternator load dump. IC Role / Device Role: Standoff-rated TVS on 12 V power input and LIN signal line, leveraging AEC-Q101 qualification. Use Value: Maintains functional safety integrity without requiring additional filtering or redundancy in Class B automotive applications. |
| Telecom Power Supply Input | Consumer USB-C Port Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role: Parallel-connected TVS on DC output rails feeding PoE injectors and remote radio units. Use Value: Absorbs 600 W pulses without degradation, enabling compact board area vs. multi-stage MOV+TVS solutions. |
Use Scenario: Bidirectional clamping on USB-C CC and VBUS lines to meet IEC 61000-4-2 ±15 kV air/±8 kV contact ESD requirements. IC Role / Device Role: Low-capacitance TVS integrated into Type-C connector subassembly for portable audio/video devices. Use Value: Sub-1 µA leakage preserves battery life; 69.4 V clamping avoids false overvoltage shutdown in 20 V PD negotiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Acceptable for commercial/industrial use where automotive reliability is not required. | Select when cost sensitivity outweighs halogen-free or automotive qualification needs. |
| SMAJ43CAHM3 | Lower PPPM (400 W); same VWM/VBR/VC; SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable only for lower-energy transients or space-constrained designs with adequate thermal relief. | Choose only if board area is critical and surge threat level is ≤ IEC 61000-4-5 Level 3. |
Compared with SMBJ43CAHE3_A/H and SMAJ43CAHM3, the SMBJ43CAHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 600 W surge rating in the SMB footprint - making it the optimal choice for automotive and high-reliability industrial deployments where long-term material compliance and surge margin are non-negotiable.
Availability
SMBJ43CAHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply, long-lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ43CAHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series targets high-energy transient suppression in harsh environments; designed for automotive, industrial, and telecom applications demanding AEC-Q101 validation, robust surge handling, and consistent clamping behavior.
FAQ
What does the "CA" suffix indicate in SMBJ43CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ43CAHM3_A/H provides symmetrical clamping for both positive and negative transients without polarity dependency. This differs from unidirectional variants (e.g., SMBJ43AHM3_A/H) that require correct cathode orientation and only suppress one polarity. The CA version is ideal for AC signal lines, differential buses, and floating power domains.
Is SMBJ43CAHM3_A/H suitable for automotive applications?
Yes - SMBJ43CAHM3_A/H carries the HM3 suffix, confirming halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22-A114, making it approved for use in automotive body electronics, infotainment power supplies, and sensor front-ends per ISO 16750-2 load dump requirements.
What is the maximum clamping voltage of SMBJ43CAHM3_A/H and why does it matter?
The maximum clamping voltage (VC) of SMBJ43CAHM3_A/H is 69.4 V at 8.6 A peak pulse current (IPPM) under 10/1000 µs waveform. This value defines the highest voltage seen by protected circuitry during a surge event - directly determining whether downstream ICs (e.g., 75 V-rated regulators or 60 V MOSFETs) remain within safe operating limits. Lower VC improves system robustness without increasing component count.
How does the SMB (DO-214AA) package of SMBJ43CAHM3_A/H compare to SMA (DO-214AC)?
The SMB package used in SMBJ43CAHM3_A/H offers higher power handling (600 W vs. SMAJ's 400 W) and lower thermal resistance (RθJA = 100 °C/W vs. SMA's 140 °C/W) due to larger copper pad area and improved heat spreading. Its 0.205" × 0.130" footprint provides better mechanical stability than SMA in vibration-prone environments like automotive chassis mounting - critical for long-term reliability.
Does SMBJ43CAHM3_A/H require a heatsink for standard operation?
No - SMBJ43CAHM3_A/H is designed for operation without external heatsinking when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet. Its RθJA of 100 °C/W allows full 600 W pulse dissipation within junction temperature limits (≤150 °C) under typical PCB thermal conditions. Heatsinks are unnecessary unless ambient exceeds 70 °C or duty cycle increases beyond 0.01%.
SMBJ43CAHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ43CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHM3_A/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_A/H reliable?
The price and inventory of SMBJ43CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHM3_A/H?
SMBJ43CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHM3_A/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_A/H?
For technical support, including SMBJ43CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ43CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHM3_A/H?
All SMBJ43CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ43CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHM3_A/H Tags
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