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Vishay General Semiconductor - Diodes Division SMBJ40C-E3/52
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- Part No.:
- SMBJ40C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40C-E3/52.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,621
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Product details
Overview
SMBJ40C-E3/52 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), 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and industrial sensor interfaces.
For engineers reviewing the SMBJ40C-E3/52 datasheet, SMBJ40C-E3/52 pinout, SMBJ40C-E3/52 application, or SMBJ40C-E3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and precise mechanical mounting guidance per J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its breakdown voltage (VBR) is specified at 44.4–49.1 V with 1 mA test current, ensuring reliable turn-on before system-level damage thresholds are exceeded.
The device is rated for 150 °C maximum junction temperature and exhibits a thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes, though SMBJ40C-E3/52 itself is commercial-grade RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 40 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 44.4–49.1 V at 1 mA - Voltage at which device enters avalanche conduction; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 64.5 V at IPPM = 9.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survival. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized surge waveform; enables single-device protection for IEC 61000-4-5 Level 3. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Minimal standby power loss and negligible loading on sensitive analog/sensor circuits. |
| TJ max. | 150 °C - Enables operation in under-hood automotive or high-temperature industrial enclosures without thermal shutdown. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated assembly; 5.59 mm × 4.06 mm × 2.20 mm profile supports high-density PCB layouts. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL level 1 compliant (peak reflow 260 °C), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connected to protected line (e.g., +12 V rail); clamps positive transients to ground when voltage exceeds VBR. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping path during overvoltage events; must maintain low-inductance layout. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surges up to 1 kV/500 A open-circuit on 2 Ω source impedance. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices, preserving MOSFET gate oxide integrity. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved reliability in humid or thermally cycling environments versus epoxy-passivated alternatives. |
| MSL level 1 moisture sensitivity | Eliminates bake requirements prior to reflow; supports direct placement into high-volume SMT lines without handling delays. |
| RoHS-compliant, halogen-free option available | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC JS709B material restrictions for green manufacturing. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motors and solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between motor supply rail and chassis ground to clamp switching spikes. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or gate oxide rupture in half-bridge driver ICs rated for 75 V absolute maximum. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-clamp TVS on VCC line upstream of LDO regulator, absorbing 100 ms/12 V load dump surges. Use Value: Withstands 100 A IFSM surge (8.3 ms half-sine), enabling robustness beyond ISO 7637-2 Pulse 5a without external fusing. |
| Industrial Sensor Interfaces | Telecom Power Feeds |
|
Use Scenario: Shielding 24 V analog input channels (e.g., 4–20 mA loop receivers) from ESD and field wiring transients. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on signal line to preserve measurement accuracy while providing fast clamping. Use Value: Sub-100 ps response time prevents ESD-induced latch-up in precision op-amps and ADC front-ends. |
Use Scenario: Overvoltage protection on -48 V telecom DC distribution lines feeding remote radio units. IC Role / Device Role / Timing Role: Unidirectional TVS configured anode-to-rail to clamp negative-going surges on negative supply rail. Use Value: 64.5 V clamping voltage ensures protected equipment remains within -53 V to -45 V operational window during lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-E3/52 | Identical VWM (40 V), VC (64.5 V), and PPPM (600 W); same SMB package and RoHS/E3 compliance. | No functional difference; "A" suffix denotes unidirectional variant - identical to "C" in this family per Vishay documentation. | Select SMBJ40A-E3/52 if legacy BOM references "A" suffix; electrically and mechanically interchangeable with SMBJ40C-E3/52. |
| SMCJ40A-E3/52 | Same VWM and VC, but SMC (DO-214AB) package - 7.11 mm × 6.22 mm footprint, 1500 W PPPM rating. | Higher power handling suits 400 V surge tests (IEC 61000-4-5 Level 4); requires larger PCB area and different pad layout. | Choose SMCJ40A-E3/52 only when 1500 W surge immunity is required; not a drop-in replacement due to larger package and thermal mass. |
Compared with SMBJ40C-E3/52, SMBJ40A-E3/52 offers identical protection performance in the same compact SMB footprint, while SMCJ40A-E3/52 trades board space for 2.5× higher surge capacity - making the former ideal for space-constrained designs and the latter for high-energy threat environments.
Availability
SMBJ40C-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply across multi-year production cycles.
Supply support for SMBJ40C-E3/52 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, power efficiency, and automotive-grade qualification.
The SMBJ series targets cost-sensitive, high-volume applications demanding robust transient suppression in compact surface-mount packages - optimized for automated manufacturing and harsh-environment deployment.
FAQ
What is the clamping voltage of SMBJ40C-E3/52 at its rated peak pulse current?
The SMBJ40C-E3/52 has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current (IPPM) of 9.3 A under the standard 10/1000 µs waveform. This value is measured at the device terminals with specified PCB pad layout (0.2" × 0.2" copper), and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ40C-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
SMBJ40C-E3/52 is RoHS-compliant and commercial-grade, but not AEC-Q101 qualified. For automotive use, select the Vishay variant SMBJ40CHE3_B or SMBJ40CHM3_B, which carry the HE3/HM3 suffix and are explicitly qualified to AEC-Q101. The "E3/52" suffix alone indicates commercial temperature range (-55 °C to +150 °C) without automotive stress testing.
How does the SMBJ40C-E3/52 differ from SMBJ40A-E3/52?
Vishay documentation confirms that SMBJ40C-E3/52 and SMBJ40A-E3/52 are functionally identical unidirectional TVS diodes - both share the same VWM (40 V), VBR (44.4–49.1 V), VC (64.5 V), PPPM (600 W), and SMB package. The "C" and "A" suffixes denote the same unidirectional configuration in this family; no electrical or mechanical distinction exists between them.
What is the maximum reverse leakage current for SMBJ40C-E3/52 at its stand-off voltage?
The SMBJ40C-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 40 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss and avoids interference with high-impedance sensor inputs or battery-powered circuits where quiescent current is critical.
Can SMBJ40C-E3/52 be used in bidirectional protection configurations?
No - SMBJ40C-E3/52 is a unidirectional TVS diode, marked with a cathode band and intended for clamping positive transients to ground. For bidirectional protection, Vishay specifies the CA suffix (e.g., SMBJ40CA), which uses a symmetrical structure to suppress both positive and negative transients without polarity dependence.
SMBJ40C-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ40C-E3/52 FAQ
1.How can I place an order for SMBJ40C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40C-E3/52 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 SMBJ40C-E3/52 reliable?
The price and inventory of SMBJ40C-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ40C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40C-E3/52?
SMBJ40C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40C-E3/52 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 SMBJ40C-E3/52?
For technical support, including SMBJ40C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40C-E3/52 requirements.
6.How does Aetrix verify that SMBJ40C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ40C-E3/52 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 SMBJ40C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ40C-E3/52?
All SMBJ40C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40C-E3/52, 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 SMBJ40C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ40C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40C-E3/52 Tags
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