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Vishay General Semiconductor - Diodes Division SMBJ24HE3/52
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- Part No.:
- SMBJ24HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24HE3/52.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,391
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Product details
Overview
SMBJ24HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power interfaces.
For engineers reviewing the SMBJ24HE3/52 datasheet, SMBJ24HE3/52 pinout, SMBJ24HE3/52 application, or SMBJ24HE3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and real-world clamping behavior under surge conditions - all critical for ESD/surge co-design and layout-aware PCB protection.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 24 V, it avalanches into low-impedance conduction to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for unidirectional operation (cathode-banded polarity), SMBJ24HE3/52 complies with ANSI/IEEE C62.35 surge standards and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. It supports 100 A non-repetitive forward surge current (IFSM) and exhibits 0.096 %/°C temperature coefficient of VBR, enabling predictable performance across automotive and industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - Confirmed avalanche onset range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 600 W 10/1000 µs surge; limits stress on protected MOSFETs or regulators. |
| PPPM | 600 W - Peak pulse power handling capability; validates protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth). |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; completes clamping loop during transients. |
| Cathode | Reverse voltage sensing / Surge current sink | Banded end; connected to protected line (e.g., 24 V rail); conducts avalanche current to ground when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe lightning-induced surges per IEC 61000-4-5 without external series impedance. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including engine control units and body controllers requiring extended temperature and life-cycle reliability. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for sensitive gate drivers and ADC inputs. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal cycling stress. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: 24 V battery-supplied microcontroller power input in engine control module exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping TVS placed directly at MCU VIN pin to clamp transients before LDO regulator. Use Value: Limits voltage to ≤38.9 V during 15.4 A surge, preventing LDO overvoltage failure and ensuring MCU brown-out immunity. |
Use Scenario: 24 V digital input channel on programmable logic controller receiving signals from field sensors subject to inductive switching spikes. IC Role / Device Role / Timing Role: Front-end transient suppressor on input terminal block, upstream of optocoupler or Schmitt trigger. Use Value: Clamps 600 W surges within nanoseconds, preserving signal integrity and eliminating false triggering caused by >100 V spikes. |
| Telecom DC Power Feeding | Motor Drive Gate Driver Protection |
|
Use Scenario: -48 V DC power feed line in remote radio head (RRH) equipment subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS on positive rail referenced to chassis ground, coordinated with common-mode choke. Use Value: Withstands repeated 10/1000 µs surges up to 600 W while maintaining <1 µA leakage at –48 V, minimizing standby power loss. |
Use Scenario: High-side gate driver supply (VDD) in 3-phase inverter exposed to Miller-induced voltage spikes during IGBT switching. IC Role / Device Role / Timing Role: Local clamping device across gate driver VDD-GND to suppress dv/dt-induced overshoot. Use Value: Fast response time and low VC limit gate voltage excursions to safe levels (<40 V), preventing unintended IGBT turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMB package and pinout. | Approved for industrial/commercial use only; not validated for automotive temperature cycling or lifetime stress tests. | Select when AEC-Q101 qualification is unnecessary and cost optimization is prioritized for non-automotive designs. |
| SMAJ24AHE3/A | Lower PPPM = 400 W, SMA (DO-214AC) package, 1.5 mm shorter body, same VWM and VC. | Reduced surge margin; suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD, not IEC 61000-4-5 surges). | Choose for space-constrained layouts where 400 W protection suffices and board area is critical. |
Compared with SMBJ24A-E3/52, SMBJ24HE3/52 adds automotive qualification without sacrificing electrical specs; versus SMAJ24AHE3/A, it delivers 50 % higher surge power in a slightly larger but thermally superior SMB package - critical for high-reliability 24 V rail protection.
Availability
SMBJ24HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power feeding systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ24HE3/52 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, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where failure modes must be eliminated through AEC-Q101 qualification and robust thermal design.
FAQ
What is the clamping voltage of SMBJ24HE3/52 and how is it measured?
The SMBJ24HE3/52 has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards with the device mounted on 0.2" × 0.2" copper pads. The clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events - a key parameter for verifying compatibility with downstream IC absolute maximum ratings. SMBJ24HE3/52 maintains this clamping performance across its qualified temperature range.
Is SMBJ24HE3/52 suitable for automotive applications?
Yes, SMBJ24HE3/52 is AEC-Q101 qualified, explicitly validated for automotive use cases including engine control units, body electronics, and ADAS power supplies. The HE3 suffix denotes RoHS-compliant construction with AEC-Q101 qualification, covering temperature cycling, high-temperature reverse bias, and accelerated life testing. SMBJ24HE3/52 meets the reliability and traceability requirements for Tier 1 automotive suppliers and is rated for operation from –55 °C to +150 °C junction temperature - essential for under-hood deployment.
What is the difference between SMBJ24HE3/52 and SMBJ24A-E3/52?
The core electrical specifications - VWM = 24 V, VBR = 26.7–29.5 V, VC = 38.9 V, and PPPM = 600 W - are identical between SMBJ24HE3/52 and SMBJ24A-E3/52. The distinction lies in qualification: SMBJ24HE3/52 carries AEC-Q101 certification for automotive use, while SMBJ24A-E3/52 is commercial-grade only. Both share the same SMB (DO-214AA) package, pinout, and thermal characteristics. SMBJ24HE3/52 is required where automotive reliability standards apply; SMBJ24A-E3/52 suffices for industrial or consumer applications.
Does SMBJ24HE3/52 have polarity markings, and how is it installed?
Yes, SMBJ24HE3/52 is unidirectional and features a cathode band (black stripe) on the package body, marking the cathode terminal. During PCB layout, the banded end must connect to the line being protected (e.g., 24 V rail), while the anode connects to system ground. Incorrect orientation renders the device ineffective for reverse-transient suppression. The SMB (DO-214AA) outline and pad layout match JEDEC DO-214AA standards, and polarity alignment is verified via optical inspection per IPC-A-610.
What is the thermal resistance and how does it affect SMBJ24HE3/52 layout?
SMBJ24HE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes no additional heatsinking. Layout impact is direct: for sustained surge duty cycles or elevated ambient temperatures, increasing copper area or adding thermal vias reduces effective RθJA and prevents junction overheating. Derating curves in the SMBJ24HE3/52 datasheet show power capability drops linearly above 25 °C ambient - proper thermal design ensures SMBJ24HE3/52 remains within its 150 °C TJ limit.
SMBJ24HE3/52 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 14A
- 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)
SMBJ24HE3/52 FAQ
1.How can I place an order for SMBJ24HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24HE3/52 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 SMBJ24HE3/52 reliable?
The price and inventory of SMBJ24HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24HE3/52?
SMBJ24HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24HE3/52 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 SMBJ24HE3/52?
For technical support, including SMBJ24HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24HE3/52 requirements.
6.How does Aetrix verify that SMBJ24HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24HE3/52 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 SMBJ24HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24HE3/52?
All SMBJ24HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24HE3/52, 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 SMBJ24HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ24HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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