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Vishay General Semiconductor - Diodes Division SMBG24A-M3/5B
- Part No.:
- SMBG24A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG24A-M3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,517
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Product details
Overview
SMBG24A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed on automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMBG24A-M3/5B datasheet, SMBG24A-M3/5B pinout, SMBG24A-M3/5B application, or SMBG24A-M3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 24 V and rapidly transitions to low-impedance conduction above its 26.7 V minimum breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable surge response under repetitive transients.
The SMBG24A-M3/5B delivers 38.9 V clamping at 15.4 A (10/1000 μs), achieving low incremental surge resistance and fast response time - critical for protecting MOSFET gates, microcontroller I/O pins, and CAN/LIN bus interfaces against ESD, load dump, and inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuit. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage limits transient energy delivered to downstream ICs; enables design margin for 3.3 V/5 V logic protection. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform supports automotive load-dump immunity per ISO 7637-2. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures without derating. |
| Package | SMBG (DO-215AA) - Surface-mount package with 0.235" × 0.255" footprint; optimized for automated placement and thermal dissipation via 5.0 mm × 5.0 mm copper pads. |
Pinout & Package
Package: SMBG (DO-215AA), unidirectional configuration with cathode band marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; completes clamping loop during overvoltage events. |
| Cathode | High-side input terminal | Connected to protected line (e.g., sensor output or power rail); marked by visible band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS compliant (M3) | Meets JEDEC JESD201 Class 2 whisker resistance and environmental compliance requirements for industrial and automotive supply chains. |
| 600 W peak pulse power (10/1000 μs) | Supports ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge immunity up to Level 4 without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping - preserves timing margins and prevents latch-up in adjacent CMOS devices. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and MCU ADC input to limit transient excursions to ≤38.9 V. Use Value: Prevents ADC saturation and input-stage damage while maintaining signal integrity across -40 °C to +125 °C ambient. | Use Scenario: Safeguarding RS-485 transceiver data lines in programmable logic controllers subjected to EFT bursts and field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-connected TVS on differential pair, referenced to local ground, absorbing ±1 kV EFT per IEC 61000-4-4. Use Value: Maintains data integrity without adding capacitance-induced jitter - typical junction capacitance <100 pF at 0 V bias. |
| DC Power Rail Protection | MOSFET Gate Protection |
Use Scenario: Secondary overvoltage clamp on 24 V DC distribution bus feeding multiple subsystems in factory automation equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting transients exceeding 24 V before they propagate to downstream DC-DC converters and regulators. Use Value: Limits bus voltage excursion to 38.9 V during 600 W surge events, preventing catastrophic failure of 36 V-rated components. | Use Scenario: Gate-source protection of N-channel power MOSFETs driving solenoids or relays in automotive body control units. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly across gate and source terminals to clamp Miller-induced spikes during switching. Use Value: Suppresses >20 V gate overvoltage spikes within nanoseconds, avoiding oxide breakdown and ensuring long-term FET reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-M3/5B | Same VWM (24 V), but lower PPPM = 600 W (same rating), higher VC = 38.9 V (identical), identical SMB package and M3 suffix. | No functional difference; SMBJ and SMBG share same electrical specs for 24 V grade - SMBG offers tighter VBR tolerance (26.7–29.5 V vs. SMBJ24A's 26.7–30.6 V). | Select SMBG24A-M3/5B when tighter VBR consistency is required for precise clamping threshold control. |
| 1.5SMC24AHE3/A | Higher package thermal resistance (RθJA ≈ 125 °C/W vs. SMBG's 100 °C/W); same VWM, VBR, and VC; AEC-Q101 qualified (HE3 suffix). | SMC package has larger footprint (7.11 mm × 6.22 mm) and lower mounting density; suited for high-energy surges where board space allows. | Choose 1.5SMC24AHE3/A only if layout permits larger SMC footprint and higher thermal mass is needed for sustained surge duty cycles. |
Compared with SMBJ24A-M3/5B and 1.5SMC24AHE3/A, SMBG24A-M3/5B provides identical clamping performance in a smaller DO-215AA outline with superior thermal resistance and tighter VBR distribution - optimizing PCB area and surge margin in space-constrained automotive and industrial modules.
Availability
SMBG24A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and DC power rail safeguarding requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SMBG24A-M3/5B 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMBG series was developed for high-reliability surface-mount transient suppression in automotive and industrial systems - prioritizing AEC-Q101 qualification, tight parametric control, and compatibility with high-speed automated assembly.
FAQ
What is the maximum clamping voltage of SMBG24A-M3/5B at its rated peak pulse current?
The SMBG24A-M3/5B has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMBG24A-M3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG24A-M3/5B suitable for automotive applications?
Yes, SMBG24A-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass-passivated junctions, halogen-free molding compound (M3 suffix), and validated performance across -55 °C to +150 °C junction temperature. The SMBG24A-M3/5B meets requirements for load dump, ESD, and EFT immunity in vehicle subsystems.
What does the "M3" suffix indicate in SMBG24A-M3/5B?
The "M3" suffix in SMBG24A-M3/5B denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It also signifies industrial-grade qualification and compatibility with lead-free reflow profiles up to 260 °C peak (MSL Level 1). The M3 variant is distinct from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) versions.
How does SMBG24A-M3/5B differ from bidirectional TVS diodes like SMBG24CA-M3/5B?
SMBG24A-M3/5B is unidirectional and intended for DC-biased lines where polarity is fixed (e.g., 24 V supply rails or sensor outputs referenced to ground). In contrast, SMBG24CA-M3/5B is bidirectional and used on AC-coupled or floating lines such as data buses. The SMBG24A-M3/5B has a cathode band marking and conducts only in reverse bias; SMBG24CA-M3/5B has no polarity marking and clamps symmetrically in both directions.
What is the recommended PCB pad layout for SMBG24A-M3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBG24A-M3/5B to achieve rated 600 W pulse power and thermal performance. The pad layout must follow the DO-215AA outline in the datasheet (Document Number 88456), with controlled solder mask clearance to maximize thermal conduction. Use of internal ground planes and thermal vias beneath pads further enhances surge energy dissipation for the SMBG24A-M3/5B.
SMBG24A-M3/5B 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMBG24A-M3/5B FAQ
1.How can I place an order for SMBG24A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG24A-M3/5B 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 SMBG24A-M3/5B reliable?
The price and inventory of SMBG24A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG24A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG24A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG24A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG24A-M3/5B?
SMBG24A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG24A-M3/5B 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 SMBG24A-M3/5B?
For technical support, including SMBG24A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG24A-M3/5B requirements.
6.How does Aetrix verify that SMBG24A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG24A-M3/5B 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 SMBG24A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG24A-M3/5B?
All SMBG24A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG24A-M3/5B, 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 SMBG24A-M3/5B part is unused and in its original packaging.
Return procedure for SMBG24A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG24A-M3/5B Tags
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