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Vishay General Semiconductor - Diodes Division SMBJ15CA-E3/5B
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- Part No.:
- SMBJ15CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,535
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Product details
Overview
SMBJ15CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V standoff 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 SMBJ15CA-E3/5B datasheet, SMBJ15CA-E3/5B pinout, SMBJ15CA-E3/5B application, or SMBJ15CA-E3/5B equivalent, this device is selected for bidirectional surge suppression where low clamping ratio, fast response time, and AEC-Q101 qualification readiness are critical - especially in automotive sensor modules, industrial I/O protection, and telecom line interface circuits.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 16.7 V (min) and 18.5 V (max) at 1.0 mA test current. Its clamping behavior is characterized by low incremental surge resistance and sub-nanosecond response time, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
The device complies with ANSI/IEEE C62.35 standards for transient suppressors and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C lead-free reflow compatibility. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 16.7–18.5 V @ 1.0 mA - Confirmed bidirectional avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V @ 24.6 A - Peak voltage seen by protected circuit during 10/1000 µs surge; enables safe margin for 15 V-rated ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability under standardized 10/1000 µs waveform; supports repetitive surge duty cycle ≤ 0.01 %. |
| IPPM (Peak Pulse Current) | 24.6 A - Maximum non-repetitive surge current the device can divert without failure; validated per Fig. 1 & 3 in datasheet. |
| TJmax | 150 °C - Maximum allowable junction temperature; enables use in high-ambient industrial and under-hood automotive environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.155" footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminal structure with two terminals (Anode/Cathode interchangeable in AC operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One side of symmetrical PN junction; connects to protected line or node requiring bidirectional clamping. |
| Terminal 2 | Cathode (bidirectional) | Other side of symmetrical PN junction; completes low-impedance path to ground or reference rail during either polarity surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN bus, or differential sensor outputs. |
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation when mounted per recommended 0.2" × 0.2" copper pads. |
| Low clamping voltage (24.4 V) | Provides 63 % clamping ratio (VC/VWM), minimizing stress on downstream 15 V-rated components such as microcontrollers or analog front-ends. |
| MSL Level 1, 260 °C reflow | Supports lead-free assembly without preconditioning; eliminates moisture-related popcorning risk in high-volume manufacturing. |
| AEC-Q101 qualification path | Base P/NHE3/HM3 variants available - confirms suitability for automotive applications including body control modules and ADAS sensor interfaces. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: Protecting 15 V supply rails and analog output lines of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and MCU ADC input or power rail and ground, clamping transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 15 V-tolerant op-amps and SAR ADCs during 1 kV EFT bursts per IEC 61000-4-4. |
Use Scenario: Safeguarding digital inputs (e.g., door lock switch signals) in BCMs connected to chassis-ground-referenced switches subject to load dump and jump-start surges. IC Role / Device Role / Timing Role: TVS installed across input pin and chassis ground to shunt >100 V transients while maintaining signal integrity during normal 0–12 V logic transitions. Use Value: Ensures functional safety compliance (ISO 26262 ASIL-B) by limiting voltage excursion to <25 V during ISO 7637-2 Pulse 5a (load dump). |
| Telecom Line Interface (RS-485) | Consumer Appliance Motor Control Board |
|
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., SN65HVD72) on building automation networks vulnerable to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode to ground, suppressing common- and differential-mode transients simultaneously. Use Value: Maintains data integrity up to 10 Mbps by limiting differential overshoot to <25 V, preventing receiver saturation or false edge detection. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers on washing machine motor control boards from commutation spikes generated by universal motor brushes. IC Role / Device Role / Timing Role: TVS located at motor driver IC power input and microcontroller I/O pins, clamping 600 V/10 A spikes from inductive kickback. Use Value: Extends field reliability by eliminating intermittent resets and MOSFET failures caused by repeated 100 ns–1 µs transients exceeding 30 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same thermal and surge ratings. | No difference in circuit function or layout; selected when halogen-free material compliance is required for end-product certification. | Choose SMBJ15CA-M3/5B for EU EcoDesign or Japan J-Moss compliance where halogen content must be minimized. |
| SMAJ15CA-E3/61 | Lower peak pulse power (400 W vs. 600 W); smaller SMA (DO-214AC) package with higher RθJA (140 °C/W); VC = 24.4 V @ 16.7 A. | Not suitable for high-energy transients (e.g., ISO 7637-2 Pulse 5a); limited to lower-power signal-line protection where board space is constrained. | Select SMAJ15CA-E3/61 only when PCB area is critical and surge threat level is limited to IEC 61000-4-2/4-4 Level 3. |
Compared with SMBJ15CA-E3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMAJ15CA-E3/61 trades 33 % lower surge capacity and higher thermal resistance for a 30 % smaller footprint - making SMBJ15CA-E3/5B the preferred choice for industrial-grade energy handling and thermal stability.
Availability
SMBJ15CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ15CA-E3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ15CA-E3/5B at its rated peak pulse current?
The SMBJ15CA-E3/5B has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 24.6 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88392 and reflects worst-case device behavior at TA = 25 °C with proper PCB pad layout.
Is SMBJ15CA-E3/5B suitable for automotive applications?
SMBJ15CA-E3/5B itself is commercial-grade (RoHS-compliant, not AEC-Q101 qualified), but it shares identical electrical and mechanical specifications with the AEC-Q101-qualified variant SMBJ15CAHE3_B/I. Engineers may use SMBJ15CA-E3/5B in non-safety-critical automotive subsystems, though formal qualification requires the HE3 suffix version.
How does the bidirectional design of SMBJ15CA-E3/5B affect its placement on a PCB?
The SMBJ15CA-E3/5B has no polarity marking and functions identically in either orientation, simplifying layout for AC-coupled or floating nodes. Unlike unidirectional TVS diodes, it requires no cathode-band alignment - enabling direct replacement in differential signal paths such as RS-485 or CAN without redesigning trace routing.
What is the thermal resistance of SMBJ15CA-E3/5B, and how does it impact power derating?
SMBJ15CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per datasheet note. This value drives derating above 25 °C ambient: for example, at 70 °C ambient, its continuous power dissipation drops from 5.0 W to ~2.8 W, though transient surge capability remains unaffected.
Can SMBJ15CA-E3/5B replace SMBJ15A-E3/5B in an existing design?
No - SMBJ15CA-E3/5B is bidirectional, while SMBJ15A-E3/5B is unidirectional. Substituting them without circuit review risks improper clamping during positive-going transients on grounded lines. The CA variant is appropriate only where symmetrical protection is required, such as across differential pairs or AC signal paths.
SMBJ15CA-E3/5B 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:
- -
- 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-E3/5B FAQ
1.How can I place an order for SMBJ15CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-E3/5B 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 SMBJ15CA-E3/5B reliable?
The price and inventory of SMBJ15CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-E3/5B?
SMBJ15CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-E3/5B 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 SMBJ15CA-E3/5B?
For technical support, including SMBJ15CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ15CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-E3/5B 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 SMBJ15CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-E3/5B?
All SMBJ15CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-E3/5B, 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 SMBJ15CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ15CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-E3/5B Tags
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