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Vishay General Semiconductor - Diodes Division SMBJ24CHE3/5B
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- Part No.:
- SMBJ24CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CHE3/5B.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
SMBJ24CHE3/5B 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 DC power rails and signal lines. It features a 24 V standoff 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 sensor interface circuits.
For engineers reviewing the SMBJ24CHE3/5B datasheet, SMBJ24CHE3/5B pinout, SMBJ24CHE3/5B application, or SMBJ24CHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct replacement guidance for circuit-level ESD and lightning transient protection design.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 24 V, it avalanches to limit transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the SMB package supports automated placement and meets MSL Level 1 reflow profile (260 °C peak).
The device sustains 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), exhibits 0.096 %/°C temperature coefficient of VBR, and achieves 20 °C/W junction-to-lead thermal resistance - enabling reliable operation up to TJ = +150 °C in compact PCB layouts with minimal copper pad area (0.2" × 0.2").
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 predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 600 W 10/1000 µs surge; limits downstream IC stress below 40 V threshold. |
| PPPM | 600 W - Peak pulse power handling per JEDEC standard; validates protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth). |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); supports motor driver and relay coil suppression without failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; allows accurate thermal modeling with PCB copper pad heatsinking. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; completes clamping loop during transient events. |
| Cathode | High-side protected node | Connected to protected line (e.g., 24 V supply or signal input); band marking identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| 600 W peak pulse power (10/1000 µs) | Provides immunity against severe transients such as load dump (ISO 7637-2 Pulse 5a) and IEC 61000-4-5 combination wave surges. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) over lifetime, critical for low-power always-on circuits. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly at 260 °C peak temperature. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive microcontrollers and CAN transceivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VIN and GND, activated within <1 ns upon overvoltage detection. Use Value: Limits clamped voltage to ≤38.9 V during 15.4 A surges, preventing damage to downstream PMICs and MCU power domains rated for 40 V max. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA transmitter lines) in programmable logic controllers (PLCs) exposed to field wiring surges. IC Role / Device Role / Timing Role: Unidirectional clamp on signal return path, absorbing induced common-mode transients from nearby motor drives. Use Value: Maintains signal integrity with <1.0 µA leakage at 24 V, avoiding offset errors in precision current loops while surviving repetitive 600 W pulses. |
| DC Motor Drive Protection | Telecom Power Entry |
|
Use Scenario: Suppressing inductive kickback from brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, conducting reverse surge current during MOSFET turn-off. Use Value: Withstands 100 A single-pulse surge (8.3 ms), eliminating need for external snubbers and reducing BOM count in H-bridge designs. |
Use Scenario: Primary overvoltage protection at 24 V DC input of telecom remote radio units (RRUs) mounted on cell towers. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via outdoor cabling, coordinated with upstream MOVs. Use Value: Fast response (<1 ns) and low clamping ratio (VC/VWM = 1.62) ensure secondary protection stages remain untriggered during marginal events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3/5B | No AEC-Q101 qualification; identical electrical specs and SMB package. | Restricted to commercial/industrial use; not approved for automotive production. | Select SMBJ24AHE3/5B only if AEC-Q101 compliance is unnecessary and cost optimization is prioritized. |
| SMAJ24AHE3/A | Lower 400 W PPPM; SMA (DO-214AC) package with smaller footprint and higher RθJA (140 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surges. | Choose SMAJ24AHE3/A only for space-constrained consumer devices where 600 W surge immunity is not required. |
Compared with SMBJ24AHE3/5B and SMAJ24AHE3/A, SMBJ24CHE3/5B uniquely combines AEC-Q101 qualification, 600 W surge capability, and SMB package thermal performance - making it the sole option qualified for automotive-grade 24 V rail protection requiring full ISO 7637-2 compliance.
Availability
SMBJ24CHE3/5B is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, DC motor drive circuits, and telecom power entry protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ24CHE3/5B 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 automotive-grade validation.
The SMBJ series targets high-energy transient suppression in harsh environments, with SMBJ24CHE3/5B specifically engineered for AEC-Q101-compliant 24 V automotive and industrial power rail protection.
FAQ
What is the clamping voltage of SMBJ24CHE3/5B at its rated peak pulse current?
The SMBJ24CHE3/5B has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during a 600 W transient event. The SMBJ24CHE3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBJ24CHE3/5B qualified for automotive applications?
Yes, SMBJ24CHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating SMBJ24CHE3/5B for use in engine compartments, body control modules, and other automotive subsystems requiring certified reliability.
What does the "5B" in SMBJ24CHE3/5B indicate?
The "5B" in SMBJ24CHE3/5B denotes the preferred package code specifying 13-inch diameter plastic tape and reel packaging with a base quantity of 3200 units. This format is optimized for high-volume SMT assembly lines and differs from "52" (7-inch reel, 750 units). The "HE3" suffix confirms RoHS-compliant construction with AEC-Q101 qualification, distinguishing SMBJ24CHE3/5B from commercial-grade variants like SMBJ24AHE3/5B.
How does SMBJ24CHE3/5B compare to bidirectional TVS diodes in the same family?
SMBJ24CHE3/5B is unidirectional and intended for DC rail protection where polarity is fixed; bidirectional equivalents (e.g., SMBJ24CHE3/5B's counterpart SMBJ24CHE3/5B-CA) are used for AC or floating signal lines. The unidirectional SMBJ24CHE3/5B offers lower leakage (<1.0 µA at 24 V) and higher surge current capability in one polarity, whereas bidirectional versions exhibit symmetrical clamping but double the leakage in each direction. SMBJ24CHE3/5B is not interchangeable with CA-suffix parts without circuit redesign.
What is the thermal resistance from junction to ambient for SMBJ24CHE3/5B?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ24CHE3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test board conditions and informs derating calculations - for example, at 50 °C ambient, the device can dissipate 5.0 W continuously. For higher power handling, PCB copper area and multilayer thermal vias must be optimized beyond the minimum pad layout.
SMBJ24CHE3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ24CHE3/5B FAQ
1.How can I place an order for SMBJ24CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CHE3/5B 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 SMBJ24CHE3/5B reliable?
The price and inventory of SMBJ24CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ24CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CHE3/5B?
SMBJ24CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CHE3/5B 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 SMBJ24CHE3/5B?
For technical support, including SMBJ24CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CHE3/5B requirements.
6.How does Aetrix verify that SMBJ24CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ24CHE3/5B 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 SMBJ24CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ24CHE3/5B?
All SMBJ24CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CHE3/5B, 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 SMBJ24CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ24CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CHE3/5B Tags
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