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Vishay General Semiconductor - Diodes Division SMBG24A/52
- Part No.:
- SMBG24A/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG24A/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,975
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Product details
Overview
SMBG24A/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform).
For engineers reviewing the SMBG24A/52 datasheet, SMBG24A/52 pinout, SMBG24A/52 application, or SMBG24A/52 equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, DC-DC converter input stages, and MOSFET gate drive circuits where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
The SMBG24A/52 operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transients. Its unidirectional polarity enables integration into DC-biased lines without reverse conduction concerns, and its thermal resistance (RθJA = 100 °C/W) supports operation up to 150 °C junction temperature under defined PCB pad layout (0.2" × 0.2" copper per terminal).
It meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive surge) immunity requirements when applied with appropriate series impedance. The device is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 1.0 µA max reverse leakage at VWM - critical for low-power sensor supply rail integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Ensures reliable avalanche initiation across process variation and temperature. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage limits downstream component stress during 600 W transient events. |
| PPPM | 600 W (10/1000 µs) - Sustains high-energy surges common in automotive load-dump and inductive kickback scenarios. |
| IFSM | 100 A (8.3 ms half-sine) - Withstands repetitive motor-driver or relay-coil turn-off surges without degradation. |
| TJ max | +150 °C - Enables use in under-hood automotive modules and industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing leaded case with matte tin-plated terminals, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode indicated by band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line's low-side or ground reference; must be routed with low-inductance trace. |
| Cathode (banded end) | Avalanche clamping node | Connected to protected line's high-side (e.g., +24 V rail); determines unidirectional clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles automotive load-dump pulses (ISO 7637-2 Pulse 5a) without failure when mounted per recommended pad layout. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body controllers, and ADAS sensor modules. |
| Glass-passivated junction | Ensures stable VBR and low leakage over 15+ years in humid, high-vibration environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., >1 kV/µs ESD events), improving system-level immunity. |
| MSL Level 1 rating | Allows standard SMT reflow without baking; compatible with high-volume automated assembly lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load-dump transients (up to 60 V, 400 ms) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector entry point, shunting surge energy to chassis ground before reaching LDOs and microcontrollers. Use Value: Limits rail voltage to ≤38.9 V during 600 W transients, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional protection is not used; SMBG24A/52 serves as unidirectional clamp on powered side of loop, blocking reverse transients while allowing normal forward bias. Use Value: Maintains <1.0 µA leakage at 24 V, preserving loop accuracy; clamps EFT bursts (IEC 61000-4-4) within 1 ns to prevent ADC saturation. |
| DC-DC Converter Input Stage | MOSFET Gate Drive Line Protection |
Use Scenario: Input overvoltage suppression for 24 V input/5 V output buck converters in telecom power supplies subject to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Placed upstream of input capacitor and controller IC, acting as first-line defense against >30 V transients exceeding converter's absolute maximum rating. Use Value: 26.7–29.5 V VBR ensures clean turn-on before controller IC fails; 38.9 V clamping prevents input-stage MOSFET avalanche breakdown. |
Use Scenario: Protecting high-side N-channel MOSFET gate drivers in half-bridge motor controllers from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Connected between gate and source, clamping negative-going spikes that could exceed gate oxide rating (±20 V typical). Use Value: Sub-ns response prevents gate oxide puncture; 1.0 µA leakage avoids unintended gate discharge during PWM idle periods. |
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 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: DO-214AA (SMB); RθJA = 110 °C/W vs. 100 °C/W for SMBG. | Less effective thermal dissipation on identical PCB; requires larger copper area for same power handling. | Select SMBJ24A only if legacy SMB footprint is fixed and thermal margin ≥15 °C exists. |
| SMCJ24A | Higher PPPM = 1500 W, same VWM/VBR, DO-214AB (SMC) package; 2× larger footprint and 3× higher thermal mass. | Over-spec'd for 600 W needs; occupies 2.5× board area; suitable only where extreme surge margin is mandated. | Choose SMCJ24A only when ISO 7637-2 Pulse 5b (1000 W) compliance is required and space permits. |
Compared with SMBJ24A and SMCJ24A, SMBG24A/52 delivers optimal balance of 600 W surge capability, compact DO-215AA footprint, superior thermal resistance (100 °C/W), and AEC-Q101 qualification - making it the preferred choice for space-constrained automotive and industrial 24 V systems requiring validated reliability.
Availability
SMBG24A/52 is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial 4–20 mA sensor interfaces, DC-DC converter inputs, and MOSFET gate drive protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBG24A/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-grade qualification.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 validation, low-profile packaging, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of SMBG24A/52 and how is it measured?
The SMBG24A/52 has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards with the device mounted on 0.2" × 0.2" copper pads per terminal. The SMBG24A/52 maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C), ensuring predictable protection in harsh environments.
Is SMBG24A/52 suitable for bidirectional transient protection?
No - SMBG24A/52 is a unidirectional TVS diode, intended for DC-biased lines where reverse conduction must be blocked. For bidirectional protection, Vishay offers the SMBG24CA variant (with CA suffix), which provides symmetrical clamping in both polarities. Using SMBG24A/52 on AC or floating lines risks forward conduction and improper clamping behavior.
Does SMBG24A/52 meet automotive qualification standards?
Yes - SMBG24A/52 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ±8 kV, CDM ±1 kV). This qualification confirms its suitability for under-hood and chassis-mounted automotive applications such as body control modules and power distribution units.
What is the maximum reverse leakage current for SMBG24A/52 at rated VWM?
The SMBG24A/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM = 24 V) and TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes standby power loss in battery-powered 24 V systems - a key advantage over higher-leakage alternatives.
What package type and mounting specifications apply to SMBG24A/52?
SMBG24A/52 uses the DO-215AA (SMBG) package - a low-profile gull-wing SMD outline with 0.030" lead thickness and 0.155" × 0.130" body dimensions. It requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 600 W pulse handling and is rated MSL Level 1 (260 °C peak reflow), eliminating pre-bake requirements for standard SMT assembly.
SMBG24A/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:
- Obsolete
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG24A/52 FAQ
1.How can I place an order for SMBG24A/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG24A/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 SMBG24A/52 reliable?
The price and inventory of SMBG24A/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG24A/52 is usually 5 days.
3.What payment methods are accepted for SMBG24A/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG24A/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG24A/52?
SMBG24A/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG24A/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 SMBG24A/52?
For technical support, including SMBG24A/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG24A/52 requirements.
6.How does Aetrix verify that SMBG24A/52 is sourced from the original manufacturer or authorized distributors?
All SMBG24A/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 SMBG24A/52 meets industry standards.
7.What is the process for return or replacement of SMBG24A/52?
All SMBG24A/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG24A/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 SMBG24A/52 part is unused and in its original packaging.
Return procedure for SMBG24A/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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