My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG40A-M3/52
- Part No.:
- SMBG40A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40A-M3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,838
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG40A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 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 (10/1000 µs). It protects MOSFETs and ICs against inductive switching transients in automotive power electronics.
For engineers reviewing the SMBG40A-M3/52 datasheet, SMBG40A-M3/52 pinout, SMBG40A-M3/52 application, or SMBG40A-M3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance data, and real-world protection use cases - all confirmed from Vishay's official 88456 document (Rev. 09-Jan-2024).
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages before they damage downstream components. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at VWM), while its 100 °C/W junction-to-ambient thermal resistance requires appropriate PCB copper pad area (0.2" × 0.2") for full 600 W pulse handling.
Designed for industrial and automotive environments, SMBG40A-M3/52 meets AEC-Q101 stress testing requirements and supports repetitive surge events at 0.01 % duty cycle. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and its M3 suffix confirms halogen-free, RoHS-compliant construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Ensures reliable turn-on within tight tolerance for predictable protection threshold |
| VC @ IPPM | 64.5 V at 9.3 A - Limits voltage seen by protected circuit during worst-case 600 W transient |
| PPPM | 600 W (10/1000 µs) - Handles high-energy surges common in 12 V automotive load-dump and inductive switch-off |
| TJ max | +150 °C - Enables operation in under-hood automotive locations and industrial enclosures |
| RθJA | 100 °C/W - Requires minimum 5.0 mm × 5.0 mm copper pads per terminal to sustain full power rating |
| Leakage @ VWM | ≤1.0 µA - Minimizes standby power loss and avoids false triggering in low-current sensor circuits |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with cathode band marking on unidirectional devices. Dimensions: 6.48 mm × 3.94 mm × 2.41 mm (L × W × H); mounting pad layout defined per Vishay spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to system ground in standard unidirectional TVS configuration | Provides low-impedance path to ground when transient exceeds VBR; must be routed with low-inductance trace |
| Cathode | Marked end (band); connects to protected line (e.g., 12 V rail, signal input) | Defines polarity-sensitive placement - reversal prevents clamping and risks device failure |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Halogen-free, RoHS compliant (M3 suffix) | Meets global environmental regulations without compromising surge robustness or thermal performance |
| 600 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/5a-level transients in 12 V vehicle systems |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V supply lines feeding ECUs, body control modules, and lighting drivers from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients before LDO or DC-DC stage. Use Value: Clamps 12 V line to ≤64.5 V during 100 V/100 ms load-dump event, preventing regulator overvoltage shutdown and ensuring ECU uptime. | Use Scenario: Safeguarding gate driver inputs and feedback sensing nodes in variable-frequency AC motor drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface to absorb coupled transients before reaching isolated gate driver ICs. Use Value: Limits induced spikes to <65 V, preserving gate oxide integrity of 600 V IGBT drivers and maintaining PWM timing accuracy. |
| Telecom DC Power Feeds | Automotive Sensor Signal Lines |
Use Scenario: Shielding -48 V telecom power inputs from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of DC-DC converter to protect primary-side controller and isolation barrier. Use Value: Withstands 600 W pulses without degradation, enabling compliance with ITU-T K.20/21 immunity requirements for central office equipment. | Use Scenario: Guarding LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine compartments against ESD and ignition noise. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed at connector to avoid signal distortion on 20 kbps LIN lines. Use Value: Adds <1.0 µA leakage at 40 V, preserving sensor offset accuracy while clamping 8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG40A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable for industrial use where halogen content is unrestricted | Select E3 if halogen-free requirement is waived and cost optimization is prioritized |
| SMBG43A-M3/52 | Higher VWM (43 V), VBR 47.8–52.8 V, VC 69.4 V at 8.6 A | Better suited for 24 V systems or designs requiring higher margin above nominal rail | Choose SMBG43A-M3/52 only if system nominal voltage exceeds 40 V or clamping margin must exceed 25 V |
Compared with SMBG40A-M3/52, the E3 variant offers identical protection performance without halogen-free assurance, while SMBG43A-M3/52 shifts the clamping window upward - making it unsuitable as a drop-in replacement unless VWM margin analysis confirms compatibility with 40 V rail tolerances.
Availability
SMBG40A-M3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, telecom DC feed safeguarding, and automotive sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for SMBG40A-M3/52 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 automotive qualification.
The SMBG TransZORB® series was developed specifically for high-reliability transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of SMBG40A-M3/52 and under what test condition?
The SMBG40A-M3/52 has a maximum clamping voltage (VC) of 64.5 V, measured at a peak pulse current (IPPM) of 9.3 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBG40A-M3/52 suitable for automotive applications?
Yes, SMBG40A-M3/52 is AEC-Q101 qualified and explicitly designed for automotive use. Its construction includes halogen-free, RoHS-compliant materials (M3 suffix), MSL Level 1 reflow capability, and validated performance across –55 °C to +150 °C junction temperature - meeting requirements for engine control units, body electronics, and ADAS power rails.
How does the M3 suffix differ from E3 in SMBG40A-M3/52?
The M3 suffix in SMBG40A-M3/52 indicates halogen-free, RoHS-compliant, industrial-grade construction, whereas E3 denotes RoHS-compliant but non-halogen-free material. Both share identical electrical characteristics and packaging, but M3 satisfies stricter environmental mandates such as JEDEC J-STD-201 Class 2 whisker resistance and EU ELV Directive compliance.
What is the thermal resistance of SMBG40A-M3/52 and how does it affect layout?
SMBG40A-M3/52 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. To sustain full 600 W pulse capability, PCB layout must provide this minimum pad area; reducing pad size increases junction temperature and derates peak power handling per Vishay Figure 2.
Can SMBG40A-M3/52 be used in bidirectional configurations?
No - SMBG40A-M3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires a CA-suffixed part (e.g., SMBG40CA). Using SMBG40A-M3/52 in reverse-biased configurations will not provide symmetrical clamping and may result in catastrophic failure during positive transients on the anode side.
SMBG40A-M3/52 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:
- 1
- Bidirectional Channels:
- -
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG40A-M3/52 FAQ
1.How can I place an order for SMBG40A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40A-M3/52 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 SMBG40A-M3/52 reliable?
The price and inventory of SMBG40A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40A-M3/52?
SMBG40A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40A-M3/52 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 SMBG40A-M3/52?
For technical support, including SMBG40A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40A-M3/52 requirements.
6.How does Aetrix verify that SMBG40A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40A-M3/52 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 SMBG40A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40A-M3/52?
All SMBG40A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40A-M3/52, 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 SMBG40A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG40A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40A-M3/52 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 …
