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Vishay General Semiconductor - Diodes Division SMBJ12CHE3/5B
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- Part No.:
- SMBJ12CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CHE3/5B.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
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Product details
Overview
SMBJ12CHE3/5B 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 12 V stand-off voltage (VWM), 19.9 V maximum clamping voltage (VC) at 30.2 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform), making it suitable for protecting MOSFET gates and sensor I/O in industrial motor drives.
For engineers reviewing the SMBJ12CHE3/5B datasheet, SMBJ12CHE3/5B pinout, SMBJ12CHE3/5B application, or SMBJ12CHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown above its stand-off voltage. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5.0 μA at VWM), while the low incremental surge resistance enables rapid energy absorption during transient events.
The SMBJ12CHE3/5B is rated for 600 W peak pulse power under 10/1000 μs waveform with 0.01% duty cycle, and supports repetitive surge handling when thermally managed on recommended 5.0 mm × 5.0 mm copper pads. Its 13.3–14.7 V breakdown voltage (VBR) at 1.0 mA test current confirms tight parametric control for reliable overvoltage thresholding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VC @ IPPM | 19.9 V - Clamped voltage seen by protected circuit at 30.2 A surge; determines downstream component stress level. |
| IPPM | 30.2 A - Peak surge current capability under 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| PPPM | 600 W - Transient power dissipation capacity; enables single-device protection of 12 V rail without external current limiting. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard PCB pad; informs minimum copper area needed for sustained surge duty. |
| Leakage @ VWM | <5.0 μA - Reverse leakage current at stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
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 body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V supply or signal); initiates clamping when reverse voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 4 kV surge (line-earth) without derating or parallel devices. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and long-term parameter stability across thermal and humidity stress. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound for stringent environmental programs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and logic inputs against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source to clamp negative-going transients below –0.7 V and positive spikes above 12 V. Use Value: Prevents gate oxide damage and false triggering in 12 V control circuits exposed to >100 V switching transients. |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins in door module assemblies. IC Role / Device Role / Timing Role: Standoff clamping device on 12 V supply rail and bidirectional data lines to absorb load dump and ESD events. Use Value: Maintains system uptime during ISO 7637-2 Pulse 1 (–150 V/50 ms) and IEC 61000-4-2 ±8 kV contact discharge. |
| Consumer Power Adapters | Industrial Sensor Signal Conditioning |
Use Scenario: Secondary-side overvoltage suppression on 12 V output rails of AC/DC adapters powering smart home hubs. IC Role / Device Role / Timing Role: Fast-response shunt protector placed after secondary rectifier to limit transient overshoot during no-load to full-load transitions. Use Value: Limits output voltage excursion to ≤19.9 V during 600 W surge, preventing damage to downstream DC-DC converters and USB-PD controllers. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers) against field wiring surges in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤5 μA) clamping element placed before op-amp input stage to prevent saturation and latch-up. Use Value: Preserves signal integrity by clamping transients within 1 ns response time while adding <0.5 pF parasitic capacitance at 0 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/5B | Commercial-grade version; lacks AEC-Q101 qualification and has wider VBR tolerance (13.3–14.7 V vs. HE3's tighter spec). | Approved for non-automotive industrial use only; not validated for automotive temperature cycling or humidity testing. | Select SMBJ12A-E3/5B for cost-sensitive consumer or commercial designs where automotive qualification is unnecessary. |
| SMAJ12AHE3-A | Lower power rating (400 W), smaller SMA (DO-214AC) package, higher RθJA (140 °C/W), same VWM/VC specs. | Used where board space is constrained but surge energy is limited to ≤400 W; unsuitable for repeated 600 W events. | Choose SMAJ12AHE3-A only when footprint reduction outweighs power handling needs and thermal derating is acceptable. |
Compared with SMBJ12A-E3/5B, the SMBJ12CHE3/5B provides automotive-grade reliability and tighter parametric control; versus SMAJ12AHE3-A, it delivers 50% higher surge power handling and superior thermal performance in identical PCB layouts.
Availability
SMBJ12CHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ12CHE3/5B 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 high-reliability, high-efficiency solutions.
The SMBJ series was developed for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure immunity and long-term parameter stability are critical.
FAQ
What is the clamping voltage of SMBJ12CHE3/5B at its rated peak pulse current?
The SMBJ12CHE3/5B exhibits a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current of 30.2 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ12CHE3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBJ12CHE3/5B qualified for automotive applications?
Yes, SMBJ12CHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and footnote (1) in the thermal characteristics table. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22 standards. The SMBJ12CHE3/5B is approved for use in automotive body electronics, infotainment power supplies, and sensor interfaces where reliability under extended temperature and vibration is required.
What does the "5B" in SMBJ12CHE3/5B indicate?
The "5B" in SMBJ12CHE3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This differs from "52", which denotes a 7-inch reel with 750 units. The "HE3" portion indicates RoHS-compliant construction with AEC-Q101 qualification, while "SMBJ12C" identifies the 12 V unidirectional TVS variant in the SMBJ family. The SMBJ12CHE3/5B thus combines automotive qualification, environmental compliance, and high-volume automated assembly readiness.
How does SMBJ12CHE3/5B differ from SMBJ12A-E3/5B?
The SMBJ12CHE3/5B differs from SMBJ12A-E3/5B primarily in qualification and parametric control: SMBJ12CHE3/5B carries AEC-Q101 qualification and tighter VBR tolerance (13.3–14.7 V), whereas SMBJ12A-E3/5B is commercial-grade with broader VBR (13.3–15.9 V per datasheet row) and no automotive validation. Both share identical SMB package, 600 W rating, and RoHS compliance, but only SMBJ12CHE3/5B is approved for automotive under-hood and chassis applications.
What is the maximum operating temperature for SMBJ12CHE3/5B?
The SMBJ12CHE3/5B has a maximum operating junction temperature (TJ) of +150 °C and a storage temperature range of –55 to +150 °C. This rating is validated per AEC-Q101 stress testing and allows deployment in high-ambient environments such as engine compartments, industrial motor enclosures, and sealed power supplies. Derating of peak pulse power applies above TA = 25 °C per Figure 2 in Vishay document 88392, and the SMBJ12CHE3/5B must be mounted on minimum recommended copper pads to sustain thermal performance.
SMBJ12CHE3/5B 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 27.3A
- 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)
SMBJ12CHE3/5B FAQ
1.How can I place an order for SMBJ12CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CHE3/5B 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 SMBJ12CHE3/5B reliable?
The price and inventory of SMBJ12CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ12CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CHE3/5B?
SMBJ12CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CHE3/5B 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 SMBJ12CHE3/5B?
For technical support, including SMBJ12CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CHE3/5B requirements.
6.How does Aetrix verify that SMBJ12CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ12CHE3/5B 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 SMBJ12CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ12CHE3/5B?
All SMBJ12CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CHE3/5B, 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 SMBJ12CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ12CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CHE3/5B Tags
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