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Vishay General Semiconductor - Diodes Division SMBJ15CAHE3_B/I
- Part No.:
- SMBJ15CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHE3_B/I.pdf
- Description:
- 600W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,706
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Product details
Overview
SMBJ15CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. 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 to protect MOSFETs and sensor signal lines in industrial motor drives.
For engineers reviewing the SMBJ15CAHE3_B/I datasheet, SMBJ15CAHE3_B/I pinout, SMBJ15CAHE3_B/I application, or SMBJ15CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism. Its bidirectional symmetry enables identical electrical behavior in both polarities, eliminating polarity-sensitive layout constraints. The glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
It delivers 600 W transient suppression under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and supports repetitive surge events when thermally managed per derating curves. Junction temperature range spans −55 °C to +150 °C, and it meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1.0 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V at IPPM = 24.6 A - Peak voltage seen by protected circuit during 600 W transient; determines stress on downstream components. |
| IPPM (Peak Pulse Current) | 24.6 A (10/1000 µs) - Maximum surge current the device safely shunts without degradation; derived from PPPM and VC. |
| RθJA (Junction-to-Ambient) | 100 °C/W - Thermal resistance with standard PCB pad layout; informs minimum copper area needed for sustained 5.0 W power dissipation. |
| TJmax | +150 °C - Maximum allowable junction temperature; sets upper limit for ambient + self-heating in high-duty-cycle applications. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; designated by HE3 suffix. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under positive transient | One side of symmetrical PN junction; conducts during positive half-cycle of bidirectional surge. |
| Cathode | Current entry terminal under negative transient | Other side of symmetrical PN junction; conducts during negative half-cycle; electrically identical to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for orientation-aware layout and enables protection of AC-coupled or floating signal paths. |
| 600 W peak pulse power | Rated per 10/1000 µs waveform - handles high-energy transients from inductive switching (e.g., relay coils, solenoids) without failure. |
| Low clamping ratio (VC/VWM = 1.63) | 24.4 V / 15 V - Minimizes overvoltage stress on protected ICs compared to alternatives with higher ratios. |
| AEC-Q101 qualified | Validated for automotive environments - supports deployment in engine control units, body electronics, and ADAS sensor interfaces without additional qualification. |
| MSL Level 1 moisture sensitivity | No dry-pack or bake required before SMT assembly - simplifies manufacturing flow and reduces handling cost. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against back-EMF spikes from brushed DC motors and solenoid valves. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across power rail or signal line to limit transient excursions within safe operating area of downstream ICs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V analog front-ends by limiting surges to ≤24.4 V, even during repeated 600 W events. |
Use Scenario: Shielding LIN bus transceivers and temperature/hall-effect sensors in engine compartments from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Fast-response TVS placed at connector entry point to absorb coupled transients before they reach AEC-Q100-compliant interface ICs. Use Value: Enables compliance with automotive EMC requirements due to sub-nanosecond response time and AEC-Q101 qualification of SMBJ15CAHE3_B/I. |
| Industrial PLC I/O Modules | Consumer Appliance Control Boards |
|
Use Scenario: Safeguarding digital input optocouplers and analog ADC inputs from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between signal line and ground, leveraging 15 V VWM to coexist with 24 V nominal industrial logic levels. Use Value: Maintains signal integrity during 1 kV/500 A surge tests (IEC 61000-4-5) while adding <1 pF junction capacitance to minimize signal distortion. |
Use Scenario: Protecting microcontroller GPIOs and touch controller inputs in washing machines and HVAC systems from ESD and relay bounce. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) bidirectional suppressor placed directly at MCU pin to prevent false triggering or port damage. Use Value: Delivers robust 30 kV air-gap ESD immunity (per IEC 61000-4-2) without loading 3.3 V logic rails, thanks to tight VBR tolerance (16.7–18.5 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-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/IPPM, RoHS-compliant, packaged in 7" tape. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not critical. |
| SAC15CA | Same VWM and bidirectional function but in smaller SOD-123FL package; lower PPPM (400 W), higher VC (27 V). | Reduced board space footprint but lower surge handling; limited to lower-energy transients. | Choose for space-constrained consumer applications where 400 W rating suffices and AEC-Q101 is unnecessary. |
Compared with SMBJ15CA-E3/52, SMBJ15CAHE3_B/I adds AEC-Q101 qualification and 13" tape packaging for high-volume automotive production; versus SAC15CA, it trades size for 50% higher surge capacity and tighter clamping, making it preferable for industrial motor control and harsh-environment sensor protection.
Availability
SMBJ15CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, PLC I/O modules, and consumer appliance control boards requiring stable component supply across multi-year production cycles.
Supply support for SMBJ15CAHE3_B/I 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, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in demanding environments, with design focus on automotive, industrial, and telecom infrastructure where robustness and repeatable clamping performance are essential.
FAQ
What is the clamping voltage of SMBJ15CAHE3_B/I at its rated peak pulse current?
The SMBJ15CAHE3_B/I has a maximum clamping voltage (VC) of 24.4 V at its specified peak pulse current (IPPM) of 24.6 A under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 and reflects the worst-case voltage imposed on protected circuitry during a full-rated surge event. The SMBJ15CAHE3_B/I maintains this clamping performance bidirectionally.
Is SMBJ15CAHE3_B/I suitable for automotive applications?
Yes, SMBJ15CAHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. It has undergone stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. This makes SMBJ15CAHE3_B/I appropriate for use in engine control units, body electronics, and ADAS sensor modules where automotive-grade component validation is mandatory.
How does the bidirectional configuration of SMBJ15CAHE3_B/I affect PCB layout?
The bidirectional configuration of SMBJ15CAHE3_B/I means it has no polarity marking and functions identically regardless of orientation on the PCB. This eliminates orientation-dependent placement errors during automated assembly and allows symmetric placement across differential or AC-coupled signal paths. Unlike unidirectional TVS diodes, SMBJ15CAHE3_B/I requires no cathode band alignment, simplifying layout and reducing assembly risk.
What is the thermal resistance of SMBJ15CAHE3_B/I, and how does it impact heatsinking?
SMBJ15CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no external heatsink; for continuous power dissipation near its 5.0 W rating, additional copper pour or thermal vias are advised. The SMBJ15CAHE3_B/I's RθJA directly determines allowable ambient temperature rise under steady-state conditions.
Does SMBJ15CAHE3_B/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ15CAHE3_B/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means the device can be stored indefinitely at standard ambient conditions without dry-packaging or baking prior to SMT assembly. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, ensuring reliable interconnect in lead-free processes - a key advantage of SMBJ15CAHE3_B/I in high-yield manufacturing.
SMBJ15CAHE3_B/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ15CAHE3_B/I FAQ
1.How can I place an order for SMBJ15CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHE3_B/I 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 SMBJ15CAHE3_B/I reliable?
The price and inventory of SMBJ15CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHE3_B/I?
SMBJ15CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHE3_B/I 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 SMBJ15CAHE3_B/I?
For technical support, including SMBJ15CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ15CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHE3_B/I 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 SMBJ15CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHE3_B/I?
All SMBJ15CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHE3_B/I, 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 SMBJ15CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ15CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHE3_B/I Tags
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