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Vishay General Semiconductor - Diodes Division SMBJ24HE3/5B
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- Part No.:
- SMBJ24HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24HE3/5B.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,398
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Product details
Overview
SMBJ24HE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤38.9 V at 15.4 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines of industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ24HE3/5B datasheet, SMBJ24HE3/5B pinout, SMBJ24HE3/5B application, or SMBJ24HE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, 600 W peak pulse power rating, low 0.096 %/°C VBR temperature coefficient, and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation, it remains high-impedance until voltage exceeds VWM (24 V), then rapidly avalanches to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
Thermally, it delivers 5.0 W steady-state power dissipation at TA = 50 °C with RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - Confirmed avalanche onset range; ensures consistent triggering across production lots and temperature. |
| VC @ IPPM | ≤38.9 V at 15.4 A - Clamped voltage under 10/1000 µs surge; guarantees downstream ICs see <39 V during worst-case transients. |
| PPPM | 600 W - Peak pulse power handling capability; supports repetitive surges up to 0.01 % duty cycle without degradation. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); protects against accidental polarity reversal events. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Leakage ID | ≤1.0 µA at VWM - Ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to system ground or lower-potential rail; completes clamping loop during overvoltage events. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 24 V supply or CAN_H); conducts only during avalanche breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress test requirements for temperature, humidity, and mechanical robustness. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or load dump without failure - suitable for 24 V commercial vehicle systems. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of parameter drift due to moisture ingress or contamination. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning; eliminates moisture-related popcorning during assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sub-5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to downstream regulators and MCU power domains rated for 40 V max. |
Use Scenario: Safeguarding gate drivers and feedback signal lines in variable-frequency drives subjected to IGBT switching noise. IC Role / Device Role / Timing Role: Transient suppression on isolated gate drive outputs and analog current sense paths. Use Value: Sub-1 ns response and low clamping voltage preserve timing integrity of PWM signals and prevent false fault detection in current sensing circuits. |
| Telecom Power Interface | Consumer Appliance Control Board |
|
Use Scenario: Shielding PoE-powered equipment front-end circuitry from induced surges on Ethernet cables and AC adapters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V auxiliary power input derived from midspan injectors. Use Value: 600 W rating absorbs multiple 10/1000 µs surges per IEC 61000-4-5 Level 3, ensuring field reliability without derating. |
Use Scenario: Securing microcontroller I/O pins and relay coil suppression on washing machine main control boards exposed to pump motor commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on 24 V solenoid driver outputs and Hall-effect sensor supply lines. Use Value: AEC-Q101 qualification ensures long-term stability in thermally cycled environments; low leakage avoids standby current penalties. |
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-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMB package. | Not approved for automotive production; suitable for industrial or consumer designs where automotive qualification is not mandated. | Select SMBJ24A-E3/5B when cost sensitivity outweighs automotive compliance requirements and lifecycle assurance is less critical. |
| SAC24-01ETG | Smaller SOD-123FL package; lower 400 W PPPM; VC = 38.5 V at 10.5 A; same VWM and VBR range. | Limited surge handling capacity; best suited for space-constrained, lower-energy applications like USB-C PD port protection. | Choose SAC24-01ETG only if board area is constrained and peak transient energy remains below 400 W - verify with actual surge test data. |
Compared with SMBJ24A-E3/5B, SMBJ24HE3/5B adds automotive-grade reliability validation without sacrificing clamping performance; versus SAC24-01ETG, it trades compactness for 50 % higher surge power headroom and proven thermal robustness in high-temperature mounting scenarios.
Availability
SMBJ24HE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power interface protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ24HE3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where voltage surges threaten functional safety and long-term operation.
FAQ
What is the maximum clamping voltage of SMBJ24HE3/5B under standard test conditions?
The SMBJ24HE3/5B exhibits a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM = 15.4 A) using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream circuit voltage margining in designs using the SMBJ24HE3/5B.
Is SMBJ24HE3/5B compatible with lead-free reflow soldering processes?
Yes, SMBJ24HE3/5B meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, making it fully compatible with standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, ensuring reliable wetting and intermetallic formation without preconditioning.
Does SMBJ24HE3/5B have automotive qualification, and what does HE3 signify?
Yes, SMBJ24HE3/5B is AEC-Q101 qualified - verified for automotive use across temperature cycling, humidity, mechanical shock, and lifetime reliability tests. The "HE3" suffix explicitly denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants like SMBJ24A-E3/5B.
How does the thermal resistance of SMBJ24HE3/5B affect its power handling in real-world PCB layouts?
SMBJ24HE3/5B has RθJA = 100 °C/W (typical) when mounted on minimum recommended copper pads (0.2" × 0.2"). In practice, this means a 5.0 W steady-state dissipation raises junction temperature by ~500 °C above ambient - so actual usable power is limited by layout: doubling copper area reduces RθJA significantly, enabling higher sustained power in SMBJ24HE3/5B deployments.
Can SMBJ24HE3/5B be used in bidirectional protection applications?
No, SMBJ24HE3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay offers the SMBJ24CA variant (e.g., SMBJ24CAHE3/5B), which provides symmetrical clamping in both polarities and uses different breakdown and clamping specifications - SMBJ24HE3/5B must not be substituted without circuit redesign.
SMBJ24HE3/5B 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):
- 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)
SMBJ24HE3/5B FAQ
1.How can I place an order for SMBJ24HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24HE3/5B 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 SMBJ24HE3/5B reliable?
The price and inventory of SMBJ24HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ24HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24HE3/5B?
SMBJ24HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24HE3/5B 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 SMBJ24HE3/5B?
For technical support, including SMBJ24HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24HE3/5B requirements.
6.How does Aetrix verify that SMBJ24HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ24HE3/5B 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 SMBJ24HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ24HE3/5B?
All SMBJ24HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24HE3/5B, 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 SMBJ24HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ24HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24HE3/5B Tags
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