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Vishay General Semiconductor - Diodes Division SMBJ40CHE3/52
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- Part No.:
- SMBJ40CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CHE3/52.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,759
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Product details
Overview
SMBJ40CHE3/52 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 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and telecom power supplies.
For engineers reviewing the SMBJ40CHE3/52 datasheet, SMBJ40CHE3/52 pinout, SMBJ40CHE3/52 application, or SMBJ40CHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, 150 °C max junction temperature, 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, leveraging a glass-passivated silicon junction to deliver fast response (<1 ps) to transient events such as ESD, inductive switching spikes, and lightning-induced surges. Its cathode-band polarity marking enables unambiguous orientation during placement, and it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak tolerance.
The device is rated for repetitive 600 W pulse power under 0.01% duty cycle conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It supports surge currents up to 9.3 A (10/1000 µs) while maintaining clamping below 64.5 V - critical for safeguarding 3.3 V, 5 V, and 24 V logic and power ICs against ISO 7637-2 and IEC 61000-4-5 threats.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 40 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 48 V systems. |
| VBR (Breakdown Voltage) | 44.4–49.1 V at 1 mA - Confirmed breakdown threshold ensuring reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 64.5 V at 9.3 A (10/1000 µs) - Actual voltage seen by protected circuit during worst-case surge; limits stress on downstream MOSFETs or controllers. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for transient suppression without failure under standardized surge waveforms. |
| IPPM (Peak Pulse Current) | 9.3 A - Maximum non-repetitive surge current the device safely clamps; derived from VC and PPPM (P = V × I). |
| TJmax | 150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and cathode band marking on the anode side for unidirectional polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line (e.g., GND or return path) | Enables unidirectional clamping from cathode to anode; must be tied to system reference plane to absorb negative transients. |
| Cathode | Current exit terminal during reverse-biased clamping; connected to higher-potential side (e.g., VIN, signal line) | Acts as the protected node interface; clamps positive transients to VC when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood ECUs and ADAS power domains. |
| 600 W peak pulse power (10/1000 µs) | Provides robust immunity against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 Level 3 surges without degradation. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) across -55 °C to +150 °C operating range. |
| MSL Level 1 (260 °C peak) | Supports single-reflow Pb-free assembly without moisture sensitivity concerns or pre-bake requirements. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping - critical for protecting 40 V-rated MOSFETs and gate drivers. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects 12 V/24 V supply inputs in BCMs from load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients before regulation. Use Value: Limits voltage to ≤64.5 V during 100 V/50 ms load dump events, preventing LDO overvoltage failure and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, placed before series current-limiting resistor. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to <65 V within nanoseconds, preserving optocoupler CTR and enabling >100,000 surge cycles. |
| Telecom DC Power Feeder | Motor Drive Gate Driver Supply |
|
Use Scenario: Guards -48 V telecom power feeders against lightning-induced common-mode surges on outdoor plant interfaces. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each conductor (with grounding to chassis), referenced to telecom earth ground. Use Value: Withstands repeated 10/1000 µs surges up to 600 W without parameter shift, maintaining isolation integrity per GR-1089-CORE. |
Use Scenario: Protects isolated 15 V gate driver supply rails in 3-phase inverters from Miller-induced dv/dt coupling and shoot-through transients. IC Role / Device Role / Timing Role: Local clamping device mounted directly at gate driver IC VDD pin, minimizing loop inductance. Use Value: Sub-10 ns response ensures clamping occurs before gate oxide breakdown, supporting 650 V SiC MOSFETs with <100 ns turn-off times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3/52 | Same electrical specs and AEC-Q101 qualification, but base P/N lacks "C" suffix - identical unidirectional configuration and SMB package. | No functional difference; "SMBJ40AHE3/52" is legacy ordering code for same device - used interchangeably in BOMs. | Select SMBJ40CHE3/52 when referencing Vishay's current documentation; both share full cross-compatibility and traceability. |
| SMAJ40AHE3/A | Lower 400 W PPPM, SMA (DO-214AC) package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VBR/VC ratings. | Suitable only for lower-energy transients or space-constrained designs where 600 W headroom is not required. | Choose SMBJ40CHE3/52 for higher surge robustness and thermal margin; SMAJ40AHE3/A fits tighter layouts but sacrifices 33% pulse power capacity. |
Compared with SMBJ40AHE3/52, SMBJ40CHE3/52 offers identical performance and qualification - the "C" denotes updated internal revision tracking. Against SMAJ40AHE3/A, SMBJ40CHE3/52 delivers 50% higher surge energy handling and superior thermal dissipation due to larger SMB package and lower junction-to-ambient resistance.
Availability
SMBJ40CHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMBJ40CHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where sustained surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ40CHE3/52 at its rated peak pulse current?
The SMBJ40CHE3/52 has a maximum clamping voltage (VC) of 64.5 V at 9.3 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ40CHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ40CHE3/52 qualified for automotive applications?
Yes, SMBJ40CHE3/52 is AEC-Q101 qualified, verified per the full stress test suite including HTGB, H3TRB, TC, and ESD. Its construction - glass-passivated junction, MSL Level 1 rating, and 150 °C TJmax - meets automotive environmental requirements. The "HE3" suffix explicitly denotes AEC-Q101 qualification, making SMBJ40CHE3/52 suitable for body control modules, infotainment power rails, and ADAS sensor interfaces.
What does the "C" in SMBJ40CHE3/52 signify?
The "C" in SMBJ40CHE3/52 is a Vishay internal revision identifier denoting an updated manufacturing process or material lot control - not a functional change. Electrical specifications, package dimensions, AEC-Q101 qualification status, and reliability data remain identical to SMBJ40AHE3/52. The SMBJ40CHE3/52 is fully interchangeable in design and procurement, with no impact on schematic, layout, or qualification testing.
How does SMBJ40CHE3/52 differ from bidirectional variants like SMBJ40CHE3/52CA?
SMBJ40CHE3/52 is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where transients are predominantly one-polarity (e.g., load dump). Bidirectional variants (e.g., SMBJ40CHE3/52CA) suppress both positive and negative transients symmetrically and lack polarity marking. They are used in AC-coupled signal lines or floating buses - SMBJ40CHE3/52 cannot substitute for CA versions without circuit redesign.
What is the maximum reverse leakage current of SMBJ40CHE3/52 at its stand-off voltage?
At VWM = 40 V and TA = 25 °C, the SMBJ40CHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing circuits. Leakage remains below 5 µA up to 125 °C, supporting stable operation in extended-temperature industrial deployments.
SMBJ40CHE3/52 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- 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)
SMBJ40CHE3/52 FAQ
1.How can I place an order for SMBJ40CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CHE3/52 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 SMBJ40CHE3/52 reliable?
The price and inventory of SMBJ40CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ40CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CHE3/52?
SMBJ40CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CHE3/52 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 SMBJ40CHE3/52?
For technical support, including SMBJ40CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CHE3/52 requirements.
6.How does Aetrix verify that SMBJ40CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ40CHE3/52 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 SMBJ40CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ40CHE3/52?
All SMBJ40CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CHE3/52, 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 SMBJ40CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ40CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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