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Vishay General Semiconductor - Diodes Division SMBG30CAHE3/52
- Part No.:
- SMBG30CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30CAHE3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,229
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Product details
Overview
SMBG30CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), <1.0 μA reverse leakage at VWM, and 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMBG30CAHE3/52 datasheet, SMBG30CAHE3/52 pinout, SMBG30CAHE3/52 application, or SMBG30CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped bidirectional protector: symmetrical avalanche breakdown in both polarities enables suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage across -55 °C to +150 °C operating range.
The SMBG30CAHE3/52 delivers 600 W peak pulse power under 10/1000 μs waveform with 0.01 % duty cycle, supported by thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W - enabling robust surge handling in space-constrained surface-mount layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events above system rail. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage seen by protected circuit during 600 W transient; limits stress on downstream ICs or MOSFETs. |
| IPPM | 12.4 A - Peak pulse current capability under 10/1000 μs waveform; determines survivability against ISO 7637-2 Pulse 1/2a/5a surges. |
| PPPM | 600 W - Peak pulse power rating; validates suitability for automotive load-dump and inductive-switching transient suppression. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| Leakage @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance sensor paths. |
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 compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical conduction path with cathode. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; completes bidirectional clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
| 600 W peak pulse power (10/1000 μs) | Withstands repetitive ISO 7637-2 and IEC 61000-4-5 surge events without degradation in automotive and industrial settings. |
| Low profile SMBG package | Enables high-density PCB layout with 0.2" × 0.2" pad footprint; compatible with standard SMT reflow profiles up to 260 °C peak. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of moisture-induced parameter drift in humid environments. |
| MSL Level 1 (J-STD-020) | Zero floor life limitation; allows indefinite storage and use without baking prior to assembly - reduces manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or IC input pins to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor signal chains while maintaining <1.0 μA leakage to avoid offset errors. | Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, Profibus) against induced surges from motor drives or relay switching. IC Role / Device Role / Timing Role: Primary line-level transient suppressor mounted at board edge, shunting surge energy before it reaches isolation barriers or controller GPIOs. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements without adding bulkier MOV-based solutions. |
| Power Supply Rail Protection | Consumer Device USB Port |
Use Scenario: Clamping 12 V/24 V DC power rails in industrial cameras and embedded gateways exposed to inductive kickback from solenoids or fans. IC Role / Device Role / Timing Role: Secondary overvoltage limiter downstream of primary DC-DC converters, activated only during fault conditions exceeding VWM. Use Value: Limits rail collapse and prevents cascading failure of PMICs or microcontrollers during sustained overvoltage events up to 600 W. | Use Scenario: ESD and surge protection for USB 2.0 data lines and VBUS in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with D+/D− and VBUS traces to meet IEC 61000-4-2 Level 4 (±15 kV air) requirements. Use Value: Maintains signal integrity with minimal capacitance impact while providing 600 W transient absorption - critical for full-speed USB timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG30CA-E3/52 | Same electrical specs and SMBG package; lacks AEC-Q101 qualification; RoHS-compliant but industrial-grade only. | Not approved for automotive production; suitable for commercial/industrial designs where qualification is not mandated. | Select SMBG30CAHE3/52 when AEC-Q101 compliance is required; choose SMBG30CA-E3/52 for cost-sensitive non-automotive applications. |
| SMAJ30CA | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM = 400 W; RθJA = 140 °C/W. | Lower surge handling margin; limited to lighter-duty transients; less thermal robustness on same PCB area. | Use SMAJ30CA only if board space is severely constrained and peak surge energy remains ≤400 W. |
Compared with SMBG30CA-E3/52, the SMBG30CAHE3/52 adds AEC-Q101 qualification for automotive reliability, while versus SMAJ30CA it provides 50 % higher peak pulse power and superior thermal dissipation - making it the preferred choice for demanding automotive and industrial surge environments.
Availability
SMBG30CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and power supply rail clamping requiring stable component supply across long-lifecycle programs.
Supply support for SMBG30CAHE3/52 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, precision, and automotive-grade validation.
The SMBG series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low leakage, and repeatable clamping performance are mandatory.
FAQ
What does the 'HE3' suffix indicate in SMBG30CAHE3/52?
The 'HE3' suffix in SMBG30CAHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads. It distinguishes this variant from non-automotive versions like SMBG30CA-E3/52 (RoHS, industrial grade only) and confirms compliance with JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 handling requirements.
Is SMBG30CAHE3/52 unidirectional or bidirectional?
SMBG30CAHE3/52 is a bidirectional transient voltage suppressor, as confirmed by the 'CA' suffix in its part number and verified in Vishay's datasheet Section 1 ("Devices for Bidirectional Applications"). It provides symmetrical clamping for both positive and negative transients without polarity marking on the SMBG package.
What is the maximum clamping voltage of SMBG30CAHE3/52 and at what current?
The maximum clamping voltage (VC) of SMBG30CAHE3/52 is 48.4 V, measured at the peak pulse current (IPPM) of 12.4 A under a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMBG30CAHE3/52 replace SMBG30AHE3/52 in a design?
No - SMBG30CAHE3/52 and SMBG30AHE3/52 are not interchangeable. The 'CA' suffix indicates bidirectional operation, while 'A' denotes unidirectional. SMBG30AHE3/52 has a cathode band marking and conducts only in one direction; substituting it with SMBG30CAHE3/52 would eliminate polarity-dependent forward conduction needed in DC power rail applications.
What PCB pad layout is recommended for optimal thermal performance of SMBG30CAHE3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMBG30CAHE3/52 to achieve rated 600 W peak pulse power and thermal resistance RθJA = 100 °C/W. Reducing pad size de-rates both power handling and surge current capability, as shown in Figure 2 of datasheet 88456.
SMBG30CAHE3/52 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG30CAHE3/52 FAQ
1.How can I place an order for SMBG30CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30CAHE3/52 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 SMBG30CAHE3/52 reliable?
The price and inventory of SMBG30CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG30CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG30CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30CAHE3/52?
SMBG30CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30CAHE3/52 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 SMBG30CAHE3/52?
For technical support, including SMBG30CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30CAHE3/52 requirements.
6.How does Aetrix verify that SMBG30CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG30CAHE3/52 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 SMBG30CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG30CAHE3/52?
All SMBG30CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30CAHE3/52, 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 SMBG30CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG30CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30CAHE3/52 Tags
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