My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG40CA-E3/52
- Part No.:
- SMBG40CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40CA-E3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,913
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG40CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 64.5 V at 9.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40CA-E3/52 datasheet, SMBG40CA-E3/52 pinout, SMBG40CA-E3/52 application, or SMBG40CA-E3/52 equivalent, key selection criteria include bidirectional surge immunity, low clamping ratio (VC/VWM ≈ 1.61), junction temperature range (−55 °C to +150 °C), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its VWM. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity marking requirements and simplifying layout for AC-coupled or floating lines.
Engineered for high-reliability environments, it delivers 600 W peak pulse power under IEC 61000-4-5 surge conditions, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, enabling stable operation up to 150 °C junction temperature without derating on standard PCB land patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 36 V nominal systems. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamping voltage limits downstream IC stress during 600 W 10/1000 µs surges. |
| PPPM | 600 W - Peak surge power handling per IEC 61000-4-5 Level 4; validated with 0.01% duty cycle repetition. |
| TJ max | +150 °C - Enables use in under-hood automotive modules and industrial motor drives without thermal derating. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics, including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Shunts positive-going surges to ground via low-impedance path; symmetric with cathode under reverse bias. |
| Cathode | Transient current entry (negative half-cycle) | Shunts negative-going surges to ground; identical electrical behavior to anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and leakage under humidity and thermal cycling per J-STD-020 MSL level 1. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) up to Level 4 without degradation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 30 kV), improving protection margin for sensitive inputs. |
| AEC-Q101 qualification | Validates suitability for automotive infotainment, ADAS sensor interfaces, and body control modules requiring zero-failure field performance. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and inductive switching spikes in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional shunt clamp absorbing ±100 V transients while maintaining signal integrity on 12 V supply rails. Use Value: Prevents latch-up or permanent damage to transceivers like TJA1042 during ISO 7637-2 Pulse 5a (load dump) events. | Use Scenario: Safeguarding RS-485/CAN FD physical layer nodes in factory automation PLCs exposed to motor drive noise. IC Role / Device Role / Timing Role: Fast-response voltage limiter placed across differential bus lines (CAN_H/CAN_L) to clamp common-mode surges. Use Value: Maintains <10 ns response time and <65 V clamping to keep bus receivers within absolute maximum ratings during 4 kV EFT bursts. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V DC outputs of wall adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) bidirectional clamp preventing output rail collapse during 1 kV ring wave transients. Use Value: Limits output overshoot to <65 V, protecting downstream USB-PD controllers and PMICs without affecting regulation bandwidth. | Use Scenario: Primary protection for ADSL/VDSL line drivers interfacing twisted-pair telco lines vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: First-stage shunt device across tip/ring pair, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Clamps 6 kV/0.5 J surges to <65 V within 1 ns, preserving line driver ICs such as MAX232A and reducing bit error rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-E3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 10.6 A; identical SMB package. | Optimized for higher surge current tolerance in same footprint; suitable where peak current exceeds 9.3 A. | Select SMBJ40CA-E3/52 if system-level testing shows >9.3 A surge current compliance margin is required. |
| SMCJ40CA-E3/52 | Same electrical specs but larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. 100 °C/W; 1500 W PPPM. | Used where higher thermal mass and power dissipation are needed, e.g., 48 V telecom power rails. | Choose SMCJ40CA-E3/52 only when board space allows larger footprint and thermal design requires <50 °C/W junction-to-ambient resistance. |
Compared with SMBG40CA-E3/52, SMBJ40CA-E3/52 offers identical protection thresholds in the same SMBG outline but with marginally higher surge current headroom, while SMCJ40CA-E3/52 trades compactness for 2.5× higher power handling and superior thermal performance-making SMBG40CA-E3/52 optimal for space-constrained automotive and consumer modules demanding AEC-Q101 compliance.
Availability
SMBG40CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, and telecom line interface applications requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 traceability.
Supply support for SMBG40CA-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 TVS devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBG series was developed specifically for high-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where low profile, automated assembly, and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMBG40CA-E3/52 at its rated peak pulse current?
The SMBG40CA-E3/52 has a maximum clamping voltage (VC) of 64.5 V at its peak pulse current (IPPM) of 9.3 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lots, ensuring consistent protection margin for downstream circuitry. The clamping ratio (VC/VWM) is approximately 1.61, confirming efficient voltage limiting for 40 V nominal systems.
Is SMBG40CA-E3/52 suitable for automotive applications?
Yes, SMBG40CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its glass-passivated junction, MSL level 1 moisture sensitivity, and −55 °C to +150 °C operating range meet stringent automotive reliability requirements. The SMBG40CA-E3/52 is commonly deployed in LIN bus nodes and camera module power rails where transient immunity must survive load dump and jump-start conditions.
How does the bidirectional design of SMBG40CA-E3/52 affect PCB layout?
The SMBG40CA-E3/52 has no polarity marking and identical electrical characteristics in both directions, eliminating orientation constraints during placement. This simplifies PCB routing for AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating supplies. Unlike unidirectional TVS diodes, the SMBG40CA-E3/52 requires no cathode band alignment, reducing assembly errors and enabling symmetric pad layouts that improve thermal symmetry and surge current sharing.
What is the thermal resistance of SMBG40CA-E3/52, and how does it impact power dissipation?
SMBG40CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value defines the temperature rise per watt of average power; for example, sustained 0.5 W dissipation raises junction temperature by ~50 °C above ambient. The SMBG40CA-E3/52 is intended for transient (not continuous) power handling, so this RθJA ensures safe operation during short-duration surges without thermal runaway.
Does SMBG40CA-E3/52 require external current-limiting components?
No, SMBG40CA-E3/52 operates as a self-limiting shunt device and does not require series resistors or fuses for basic transient suppression. Its low dynamic impedance ensures rapid clamping without external intervention. However, in high-energy applications (e.g., ISO 7637-2 Pulse 5), coordination with upstream GDTs or PTCs may be used for staged protection-this is system-dependent and not a requirement of the SMBG40CA-E3/52 itself.
SMBG40CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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 (SMBG)
SMBG40CA-E3/52 FAQ
1.How can I place an order for SMBG40CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40CA-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 SMBG40CA-E3/52 reliable?
The price and inventory of SMBG40CA-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 SMBG40CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40CA-E3/52?
SMBG40CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40CA-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 SMBG40CA-E3/52?
For technical support, including SMBG40CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40CA-E3/52 requirements.
6.How does Aetrix verify that SMBG40CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40CA-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 SMBG40CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40CA-E3/52?
All SMBG40CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40CA-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 SMBG40CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG40CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40CA-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
