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Vishay General Semiconductor - Diodes Division SMBG24CA-M3/5B
- Part No.:
- SMBG24CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG24CA-M3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,075
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Product details
Overview
SMBG24CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 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 in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMBG24CA-M3/5B datasheet, SMBG24CA-M3/5B pinout, SMBG24CA-M3/5B application, or SMBG24CA-M3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low incremental surge resistance, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling single-device protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the low Rsurge supports effective energy diversion during ESD or lightning-induced transients.
The device is rated for 150 °C maximum junction temperature and mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions up to 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuit. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; enables suppression of high-energy transients per ISO 7637-2 Pulse 1/2/5a. |
| IPPM | 15.4 A - Peak pulse current supported at VC; directly relates to surge immunity level in real-world wiring harnesses. |
| TJ max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; functions as cathode in negative half-cycle, anode in positive half-cycle. |
| Cathode | Terminal B | Other side of symmetrical PN junction; functions identically to Terminal A under reverse bias due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in differential or AC signal protection. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics - meets stress test requirements for lifetime reliability. |
| Halogen-free & RoHS | M3 suffix denotes halogen-free molding compound and lead finish - satisfies IPC-1752A material declaration and environmental compliance mandates. |
| 600 W peak pulse power | Rated per 10/1000 μs waveform - provides margin against ISO 16750-2 load dump surges and IEC 61000-4-5 combination wave transients. |
| Low clamping ratio | VC/VWM = 1.62 - tight voltage margin between operating and clamping levels improves system-level surge margin without overdesigning downstream components. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump, jump-start, and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground - responds within <1 ns to limit transient overshoot below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and analog front-ends by limiting clamped voltage to 38.9 V during 15.4 A surge events. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field-wiring transients from motor contactors, solenoids, and relay coils. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input channels - absorbs energy from inductive kickback without affecting steady-state signal integrity. Use Value: Enables >100,000 surge cycles per channel with no parameter drift, verified per AEC-Q101 HTRB and TCT testing protocols. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges coupled through long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair - works in concert with GDTs and MOVs in multi-stage protection architecture. Use Value: Maintains signal fidelity with typical junction capacitance <100 pF at zero bias, minimizing data rate degradation on 10 Mbps+ links. | Use Scenario: Securing microcontroller GPIOs and display interface lines in washing machines, HVAC controllers, and smart home hubs against ESD and mains coupling. IC Role / Device Role / Timing Role: Point-of-entry protection on front-panel buttons, touch sensors, and communication buses (I²C, UART). Use Value: Delivers 30 kV air-gap and 25 kV contact ESD immunity per IEC 61000-4-2 Level 4, validated in system-level testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-M3/5B | Same VWM (24 V) and VC (38.9 V), but lower PPPM = 600 W vs. SMBG24CA-M3/5B's 600 W - identical rating; differs only in package outline (SMBJ = DO-214AA, larger footprint). | SMBJ24CA-M3/5B requires larger PCB pad area (6.2 mm × 4.6 mm) and has higher RθJA (120 °C/W), limiting thermal performance in dense layouts. | Select SMBG24CA-M3/5B when board space is constrained or thermal management is critical; choose SMBJ24CA-M3/5B if legacy layout uses DO-214AA footprints. |
| SMCJ24CA-M3/5B | Higher PPPM = 1500 W, same VWM/VC, but larger SMC (DO-214AB) package - 7.1 mm × 6.2 mm footprint and 150 °C/W RθJA. | SMCJ24CA-M3/5B targets higher-energy threats (e.g., ISO 7637-2 Pulse 5b) but occupies >2.5× PCB area and increases assembly cost. | Choose SMBG24CA-M3/5B for cost-optimized, space-constrained designs meeting ISO 7637-2 Pulse 1/2/5a; upgrade to SMCJ24CA-M3/5B only when 1500 W surge margin is explicitly required. |
Compared with SMBJ24CA-M3/5B and SMCJ24CA-M3/5B, the SMBG24CA-M3/5B delivers identical 600 W surge capability in the smallest footprint (DO-215AA), enabling higher component density and improved thermal efficiency - making it optimal for next-generation automotive ECUs and compact industrial controllers where layout area and thermal headroom are tightly constrained.
Availability
SMBG24CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG24CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - combining AEC-Q101 qualification, halogen-free construction, and precise clamping performance in a low-profile surface-mount package.
FAQ
What is the clamping voltage of SMBG24CA-M3/5B at its rated peak pulse current?
The SMBG24CA-M3/5B has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per standard test methods defined in ANSI/IEEE C62.35 and confirmed across production lots. The SMBG24CA-M3/5B maintains this clamping performance symmetrically in both directions due to its bidirectional structure.
Is SMBG24CA-M3/5B qualified for automotive applications?
Yes, SMBG24CA-M3/5B is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling (TC), and electrostatic discharge (ESD) per JS-001. This qualification confirms its suitability for under-hood and cabin-mounted automotive electronics such as ADAS sensors and body control modules. The SMBG24CA-M3/5B meets all requirements specified in the AEC-Q101 Rev H standard.
What does the "M3" suffix indicate in SMBG24CA-M3/5B?
"M3" denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance requirements. It also signifies industrial-grade reliability and compatibility with lead-free reflow soldering profiles up to 260 °C peak temperature (MSL Level 1). The SMBG24CA-M3/5B carries this suffix to distinguish it from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) variants.
How does SMBG24CA-M3/5B differ from unidirectional versions like SMBG24A-M3/5B?
The SMBG24CA-M3/5B is bidirectional with symmetrical VBR, VC, and IPPM in both polarities, while SMBG24A-M3/5B is unidirectional and includes a cathode band marking. Bidirectional operation allows single-device protection of AC signals or differential pairs without polarity concerns. The SMBG24CA-M3/5B exhibits identical clamping behavior regardless of transient polarity, unlike the unidirectional SMBG24A-M3/5B which conducts only in reverse bias.
What is the thermal resistance of SMBG24CA-M3/5B, and how does it affect layout design?
SMBG24CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards. This means PCB layout must provide adequate copper area and thermal vias to maintain junction temperature ≤150 °C during repetitive surges. The SMBG24CA-M3/5B's low RθJL supports efficient heat transfer to the PCB plane, reducing reliance on large external heatsinks.
SMBG24CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG24CA-M3/5B FAQ
1.How can I place an order for SMBG24CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG24CA-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 SMBG24CA-M3/5B reliable?
The price and inventory of SMBG24CA-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 SMBG24CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG24CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG24CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG24CA-M3/5B?
SMBG24CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG24CA-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 SMBG24CA-M3/5B?
For technical support, including SMBG24CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG24CA-M3/5B requirements.
6.How does Aetrix verify that SMBG24CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG24CA-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 SMBG24CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG24CA-M3/5B?
All SMBG24CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG24CA-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 SMBG24CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG24CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG24CA-M3/5B Tags
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