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Vishay General Semiconductor - Diodes Division SMBJ43HE3/5B
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- Part No.:
- SMBJ43HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43HE3/5B.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
SMBJ43HE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBJ43HE3/5B datasheet, SMBJ43HE3/5B pinout, SMBJ43HE3/5B application, or SMBJ43HE3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternatives for board-level ESD/surge hardening.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, activated when reverse voltage exceeds VBR (min 47.8 V), limiting transient energy to protect downstream ICs. Its low incremental surge resistance and <1 ps response time ensure effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Rated for -55 °C to +150 °C junction temperature, it leverages glass-passivated junction technology and meets MSL Level 1 per J-STD-020. The HE3 suffix confirms RoHS-compliant construction and AEC-Q101 qualification - critical for automotive-grade reliability in engine control units and ADAS sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Breakdown onset range; ensures consistent turn-on across production lots under standardized test current. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling capability; enables robust protection against 8/20 µs or 10/1000 µs transients without failure. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy inductive switching events. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Reverse voltage sensing / Clamping output node | Connected to protected line (e.g., CAN_H, 12 V rail); conducts avalanche current when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics; supports PPAP documentation requirements. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated surge events up to 600 W without parametric shift or catastrophic failure under defined test conditions. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - e.g., 69.4 V clamping vs. 47.8 V breakdown yields tight protection window. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related cracking or delamination risks. |
| Glass-passivated junction | Improves long-term stability and leakage performance under thermal cycling and humidity exposure versus epoxy-passivated variants. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching MCU ADC or comparator inputs. Use Value: Maintains signal integrity during 12 V system load dump events (up to 120 V/400 ms) while preserving <1 µA leakage at 43 V operating voltage. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Standoff-clamp device mounted directly at connector entry point to shunt surge energy before optocoupler or Schmitt trigger input stage. Use Value: Limits transient voltage to ≤69.4 V during 1 kV/500 A 10/1000 µs surge, preventing false triggering and latch-up in input conditioning circuitry. |
| Consumer Power Adapter Output | Telecom PoE Data Line |
|
Use Scenario: Secondary-side overvoltage protection on 5–48 V SMPS outputs exposed to capacitor discharge or feedback loop faults. IC Role / Device Role / Timing Role: Fast-acting clamp parallel to output capacitor, triggered only during abnormal overvoltage excursions beyond regulation tolerance. Use Value: Responds within picoseconds to limit output overshoot to 69.4 V, avoiding damage to connected USB-C PD controllers or battery management ICs. |
Use Scenario: Secondary protection on IEEE 802.3af/at Ethernet data pairs carrying power, supplementing primary PoE surge suppressors. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on each data line (e.g., TX+, RX−), referenced to local ground plane near PHY interface. Use Value: Adds <10 pF capacitance at 0 V bias and clamps common-mode surges to ≤69.4 V without degrading 100BASE-TX signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/5B | Commercial-grade (non-AEC-Q101), identical VWM, VBR, VC, and PPPM; same SMB package and pinout. | Lacks automotive qualification; suitable for industrial or consumer designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive compliance requirements and full temperature range validation is not needed. |
| SMCJ43AHE3/5B | Same AEC-Q101 qualification but in larger SMC (DO-214AB) package; higher PPPM = 1500 W, lower VC = 69.4 V @ 21.5 A. | Requires PCB layout change due to larger footprint; preferred where higher surge margin or lower clamping voltage is required. | Choose when system-level surge testing exceeds 600 W or when lower dynamic impedance improves clamping performance under multi-pulse stress. |
Compared with SMBJ43A-E3/5B, SMBJ43HE3/5B adds AEC-Q101 qualification for automotive use without altering electrical behavior; versus SMCJ43AHE3/5B, it trades surge capacity and thermal mass for space-constrained layouts where 600 W suffices.
Availability
SMBJ43HE3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input hardening, and telecom PoE data line safeguarding requiring stable component supply across extended production lifecycles.
Supply support for SMBJ43HE3/5B 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, efficiency, and application-specific optimization.
The SMBJ series targets board-level transient suppression in automotive, industrial, and communications systems - engineered for rapid response, repeatable clamping, and long-term stability under thermal and electrical stress.
FAQ
What is the clamping voltage of SMBJ43HE3/5B at its rated peak pulse current?
The SMBJ43HE3/5B exhibits 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 confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMBJ43HE3/5B maintains this clamping performance across its qualified operating temperature range.
Is SMBJ43HE3/5B suitable for automotive applications?
Yes, SMBJ43HE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix, and rated for operation from -55 °C to +150 °C junction temperature. It meets automotive requirements for transient immunity, thermal cycling, and long-term reliability in engine control modules, ADAS sensors, and body electronics. The SMBJ43HE3/5B is explicitly listed in Vishay's AEC-Q101 qualified product table with full test report traceability.
What is the standoff voltage and breakdown range for SMBJ43HE3/5B?
The SMBJ43HE3/5B has a reverse stand-off voltage (VWM) of 43 V and a minimum/maximum breakdown voltage (VBR) of 47.8 V / 52.8 V at 1 mA test current. This 4.8 V window ensures reliable non-conduction during normal operation while guaranteeing activation before damaging overvoltage occurs. These parameters are specified in the Electrical Characteristics table on page 2 of the Vishay SMBJ5.0A–SMBJ188A datasheet.
Does SMBJ43HE3/5B have a bidirectional variant?
No, SMBJ43HE3/5B is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., SMBJ43CA), which provide symmetrical clamping in both polarities. The "HE3" suffix denotes AEC-Q101 qualification and RoHS compliance but does not alter polarity - all "A"-suffixed parts like SMBJ43HE3/5B are unidirectional, with cathode marked by a band. Polarity is fixed and cannot be repurposed.
What package type and mounting specifications apply to SMBJ43HE3/5B?
SMBJ43HE3/5B uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.20 mm and matte tin-plated leads compliant with J-STD-002. It is rated MSL Level 1 and supports peak reflow temperatures up to 260 °C. The recommended pad layout is 5.0 mm × 5.0 mm copper per terminal, as specified in the Vishay datasheet figure on page 5 for thermal performance.
SMBJ43HE3/5B 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ43HE3/5B FAQ
1.How can I place an order for SMBJ43HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43HE3/5B 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 SMBJ43HE3/5B reliable?
The price and inventory of SMBJ43HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43HE3/5B?
SMBJ43HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43HE3/5B 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 SMBJ43HE3/5B?
For technical support, including SMBJ43HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43HE3/5B requirements.
6.How does Aetrix verify that SMBJ43HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43HE3/5B 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 SMBJ43HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43HE3/5B?
All SMBJ43HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43HE3/5B, 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 SMBJ43HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ43HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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