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Vishay General Semiconductor - Diodes Division SMBJ15A-E3/52
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- Part No.:
- SMBJ15A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15A-E3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:137,463
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Product details
Overview
SMBJ15A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against inductive switching transients and lightning-induced surges. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ15A-E3/52 datasheet, SMBJ15A-E3/52 pinout, SMBJ15A-E3/52 application, or SMBJ15A-E3/52 equivalent, key selection considerations include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 16.7–18.5 V breakdown voltage range (IT = 1 mA), and AEC-Q101 qualification eligibility via HE3 suffix variants - critical for automotive-grade surge protection design.
Technical Context
This TVS diode operates as a clamping device: under normal conditions it presents high impedance (>1 MΩ) with only 1.0 µA leakage at 15 V, but triggers into low-impedance conduction when transient voltage exceeds its 16.7–18.5 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns).
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and TJ(max) = +150 °C, enabling reliable operation in ambient temperatures up to +125 °C when derated per Figure 2. The cathode-band-marked SMB package supports automated placement and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 16.7 V / 18.5 V at IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 24.6 A (10/1000 µs) - Clamped voltage seen by protected circuit; limits downstream stress during 600 W transient. |
| IPPM | 24.6 A - Peak surge current capability under standardized 10/1000 µs waveform; validates robustness against common ESD/lightning pulses. |
| PPPM | 600 W - Peak pulse power handling capacity; determines survivability of short-duration high-energy transients. |
| IR @ VWM | 1.0 µA max - Low reverse leakage ensures minimal standby power loss and signal integrity on protected lines. |
| TJ(max) | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-temperature industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by molded band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side (e.g., ground or return path); conducts during positive transients relative to cathode. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential line (e.g., VCC, signal rail); blocks normal operation but avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation across 0.01% duty cycle. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping - critical for safeguarding 3.3 V or 5 V logic interfaces downstream. |
| MSL Level 1 (J-STD-020), 260 °C reflow peak | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
| AEC-Q101 qualification option (HE3/HM3 suffix) | Validates reliability for automotive applications including body control modules and ADAS sensor power rails. |
| Glass passivated junction | Provides stable VBR tolerance, low leakage drift over time, and resistance to humidity-induced parameter shift. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop transmitters and analog sensor outputs from load-dump and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VDD and ground, clamping transients before they reach precision ADC or op-amp front-end. Use Value: Limits voltage excursion to ≤24.4 V during 24.6 A surges, preserving 16-bit measurement accuracy and preventing latch-up in signal conditioning ICs. |
Use Scenario: Safeguarding 12 V supply inputs of BCM microcontrollers and CAN transceivers against battery load-dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary clamping device on main power input, coordinated with upstream fuse and downstream LC filter. Use Value: Absorbs up to 600 W for 1 ms without failure, maintaining system uptime and avoiding reset or brownout during vehicle ignition cycles. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 bus lines in network edge devices exposed to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Secondary-level TVS on DC bias rails feeding magnetics or isolated transceivers, complementing primary gas discharge tube (GDT) protection. Use Value: Responds in <1 ns to clamp residual transients to 24.4 V, preventing damage to 3.3 V PHY ICs while maintaining signal integrity at 100 Mbps. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals or on H-bridge supply rail, diverting inductive energy back to source. Use Value: Withstands repetitive 24.6 A surges at 0.01% duty cycle, eliminating field failures caused by MOSFET avalanche stress during motor stop/start cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | Bidirectional variant; symmetric VBR (16.7–18.5 V) in both polarities; no cathode marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-232, USB D+/D−) where reverse transients must also be clamped. | Select SMBJ15CA-E3/52 only when bidirectional protection is mandated; SMBJ15A-E3/52 is optimal for DC rails with defined polarity. |
| SMAJ15A-E3/61 | Lower power rating: 400 W PPPM, higher VC = 24.4 V @ 16.7 A; SMA (DO-214AC) package, smaller footprint (4.32 × 2.62 mm). | Suitable for space-constrained consumer PCBs with lower surge exposure (e.g., USB-C port VCONN protection), not recommended for industrial 600 W requirements. | Choose SMAJ15A-E3/61 only if board area is critical and surge threat level is ≤400 W; SMBJ15A-E3/52 provides 50% higher energy margin. |
Compared with SMBJ15CA-E3/52 and SMAJ15A-E3/61, SMBJ15A-E3/52 delivers superior unidirectional surge handling (600 W), tighter thermal resistance (RθJA = 100 °C/W vs. SMA's 125 °C/W), and broader industrial temperature support - making it the preferred choice for high-reliability 12–24 V DC systems.
Availability
SMBJ15A-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line cards, and consumer appliance motor drives requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMBJ15A-E3/52 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 application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against lightning, ESD, and load-dump events is non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ15A-E3/52 under standard test conditions?
The SMBJ15A-E3/52 has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 24.6 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience more than 24.4 V during such a transient event. The SMBJ15A-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ15A-E3/52 suitable for automotive applications?
SMBJ15A-E3/52 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 and HM3 suffixes (e.g., SMBJ15AHE3_B). These variants undergo extended stress testing for temperature cycling, humidity, and mechanical shock - validating their use in automotive body control modules and infotainment power supplies. The SMBJ15A-E3/52 shares identical electrical specs and SMB package with those qualified parts.
How does the SMBJ15A-E3/52 differ from the SMBJ15CA-E3/52?
The SMBJ15A-E3/52 is unidirectional with cathode marking and blocks reverse current, while the SMBJ15CA-E3/52 is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VBR, VWM, and VC values are identical, but the CA version is required for AC signals or floating lines. The SMBJ15A-E3/52 is preferred for DC power rails where polarity is fixed and cost-sensitive designs avoid redundant bidirectional capability.
What is the thermal resistance and maximum junction temperature of SMBJ15A-E3/52?
The SMBJ15A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads, and a maximum junction temperature (TJ(max)) of +150 °C. This allows continuous operation at ambient temperatures up to +125 °C when derated per Figure 2 in the datasheet. The SMBJ15A-E3/52 achieves this with its low-profile SMB package and glass-passivated chip construction.
Does SMBJ15A-E3/52 meet RoHS and halogen-free requirements?
Yes - the "E3" suffix in SMBJ15A-E3/52 denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads. For halogen-free compliance, Vishay offers the M3 suffix variant (SMBJ15A-M3/52). Both meet JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability standards. The SMBJ15A-E3/52 is fully compatible with lead-free reflow profiles up to 260 °C peak.
SMBJ15A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- 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 (SMBJ)
SMBJ15A-E3/52 FAQ
1.How can I place an order for SMBJ15A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15A-E3/52 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 SMBJ15A-E3/52 reliable?
The price and inventory of SMBJ15A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ15A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15A-E3/52?
SMBJ15A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15A-E3/52 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 SMBJ15A-E3/52?
For technical support, including SMBJ15A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15A-E3/52 requirements.
6.How does Aetrix verify that SMBJ15A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ15A-E3/52 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 SMBJ15A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ15A-E3/52?
All SMBJ15A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15A-E3/52, 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 SMBJ15A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ15A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15A-E3/52 Tags
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