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Vishay General Semiconductor - Diodes Division SMBJ15CA-E3/1
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- Part No.:
- SMBJ15CA-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-E3/1.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,411
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Product details
Overview
SMBJ15CA-E3/1 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMBJ) package, designed for clamping voltage transients on signal or power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform. Used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the SMBJ15CA-E3/1 datasheet, SMBJ15CA-E3/1 pinout, SMBJ15CA-E3/1 application, or SMBJ15CA-E3/1 equivalent, key selection criteria include bi-directional clamping capability, 15 V working voltage compatibility, DO-214AA thermal and mounting constraints, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 16.7 V and 18.5 V at 1 mA test current. Its low clamping ratio (VC/VWM ≈ 1.63) ensures effective overvoltage suppression during fast transients such as ESD or inductive switching spikes.
Thermal performance is defined by junction-to-ambient thermal resistance of 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and maximum junction temperature of +150 °C. The device meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Voltage at which device begins avalanche conduction; ensures reliable triggering above normal operating range. |
| VC (Clamping Voltage) | 24.4 V at IPPM = 24.6 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Maximum transient energy absorption capability under standardized 10/1000 μs waveform; defines robustness against common surges. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Minimal standby current draw; critical for low-power sensor interfaces and battery-operated systems. |
| TJ max | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules requiring extended temperature cycling, humidity, and mechanical stress compliance. |
Pinout & Package
Package: DO-214AA (SMBJ), surface-mount, bi-directional configuration with no polarity marking. Case dimensions: 4.06 mm × 5.21 mm × 2.13 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either terminal serves as input/output for transient suppression in AC or bidirectional DC paths. |
| Cathode Band (absent) | Polarity indicator | Not present on bi-directional variants like SMBJ15CA-E3/1; eliminates orientation dependency during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in standard PCB layouts. |
| AEC-Q101 qualified | Validates suitability for automotive powertrain, body control, and ADAS modules where reliability across -40 °C to +125 °C ambient is mandatory. |
| Low clamping voltage (24.4 V @ 24.6 A) | Keeps protected 15 V rail logic or analog circuits within safe operating area during surge events, minimizing risk of latch-up or damage. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures stable VBR and low leakage over time and temperature, critical for long-life industrial equipment deployments. |
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 and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump up to 60 V) while preserving <1 μA leakage at 15 V nominal supply. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor on each isolated input channel, mounted adjacent to optocoupler or Schmitt trigger input stage. Use Value: Limits clamped voltage to 24.4 V, ensuring compatibility with 28 V absolute maximum ratings of industrial interface ICs. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced surges on outdoor cabling in telecom base stations. IC Role / Device Role / Timing Role: Secondary-level protection device located after gas discharge tube (GDT) primary suppressor in multi-stage architecture. Use Value: Fast response (<1 ps) and low clamping enable coordination with upstream GDT to achieve <100 V let-through voltage per ITU-T K.21. |
Use Scenario: Preventing overvoltage damage to USB-C PD controller and load switch ICs during output short-circuit recovery in wall adapters. IC Role / Device Role / Timing Role: Output-side TVS placed between secondary-side rectifier and DC-DC post-regulator to absorb transformer leakage energy. Use Value: 600 W rating handles repetitive 10/1000 μs surges from transformer ringing without degradation over >100,000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CAHE3/1 | AEC-Q101 qualified variant with identical electrical specs; differs only in whisker test class (1A vs. 2) and qualification documentation scope. | Required for automotive OEM Tier-1 designs mandating full AEC-Q101 report submission; otherwise electrically interchangeable. | Select SMBJ15CAHE3/1 when formal automotive qualification evidence is contractually required; SMBJ15CA-E3/1 suffices for industrial or Tier-2 automotive use. |
| SMCJ15CA-E3/2 | Same VWM (15 V) and VC (24.4 V), but in larger DO-214AB (SMC) package with 1500 W PPPM rating and higher IPPM (62.9 A). | Used where higher surge endurance is needed (e.g., mains-connected equipment), but requires larger PCB footprint and different thermal layout. | Choose SMCJ15CA-E3/2 only if system-level surge testing exceeds 600 W; otherwise SMBJ15CA-E3/1 offers optimal size/power density for space-constrained boards. |
Compared with SMBJ15CAHE3/1, the SMBJ15CA-E3/1 omits formal AEC-Q101 reporting but retains identical electrical and thermal behavior; versus SMCJ15CA-E3/2, it trades surge capacity for 40 % smaller footprint and lower thermal mass-critical for high-density consumer and telecom PCBs.
Availability
SMBJ15CA-E3/1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMBJ15CA-E3/1 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series was developed for surface-mount transient suppression in space-constrained, high-reliability applications including automotive, industrial controls, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ15CA-E3/1 at its rated peak pulse current?
The SMBJ15CA-E3/1 has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ15CA-E3/1 maintains this clamping performance due to its glass-passivated avalanche junction and low incremental surge resistance.
Is SMBJ15CA-E3/1 suitable for automotive applications?
Yes, SMBJ15CA-E3/1 is RoHS-compliant and manufactured to Vishay's commercial-grade specifications, but it is not AEC-Q101 qualified. For automotive use, the functionally identical SMBJ15CAHE3/1 variant should be selected. The SMBJ15CA-E3/1 may be used in non-safety-critical automotive subsystems where formal qualification is not mandated, but design validation remains the customer's responsibility per Vishay's disclaimer policy.
How does the bi-directional configuration of SMBJ15CA-E3/1 affect PCB layout?
The SMBJ15CA-E3/1 has no polarity marking and functions identically in both directions, eliminating orientation constraints during pick-and-place assembly. This simplifies layout by removing the need for silkscreen polarity indicators or automated vision alignment checks. Engineers can place the SMBJ15CA-E3/1 symmetrically across differential pairs or AC-coupled lines without concern for terminal assignment, reducing design iteration time and manufacturing error rates.
What is the thermal resistance of SMBJ15CA-E3/1, and how does it impact power dissipation?
The SMBJ15CA-E3/1 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This means a 1 W steady-state power dissipation would raise junction temperature by ~100 °C above ambient. Since the device is intended for transient (not continuous) operation, this RθJA value primarily informs derating curves for repetitive surge duty cycles-not steady-state thermal design.
Does SMBJ15CA-E3/1 meet any industry-standard surge immunity requirements out of the box?
The SMBJ15CA-E3/1 itself is not certified to IEC 61000-4-2, -4-4, or -4-5, but its 600 W peak pulse power and 24.4 V clamping voltage enable system-level compliance when integrated into properly designed protection circuits. For example, paired with appropriate series impedance, the SMBJ15CA-E3/1 helps achieve IEC 61000-4-5 Level 3 (2 kV line-earth) in industrial equipment. Final validation must be performed at the system level per application-specific test plans.
SMBJ15CA-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ15CA-E3/1 FAQ
1.How can I place an order for SMBJ15CA-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-E3/1 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 SMBJ15CA-E3/1 reliable?
The price and inventory of SMBJ15CA-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CA-E3/1 is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-E3/1?
SMBJ15CA-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-E3/1 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 SMBJ15CA-E3/1?
For technical support, including SMBJ15CA-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-E3/1 requirements.
6.How does Aetrix verify that SMBJ15CA-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-E3/1 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 SMBJ15CA-E3/1 meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-E3/1?
All SMBJ15CA-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-E3/1, 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 SMBJ15CA-E3/1 part is unused and in its original packaging.
Return procedure for SMBJ15CA-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-E3/1 Tags
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