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Vishay General Semiconductor - Diodes Division SMBJ15CAHE3/5B
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- Part No.:
- SMBJ15CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHE3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,428
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Product details
Overview
SMBJ15CAHE3/5B 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 or 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), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ15CAHE3/5B datasheet, SMBJ15CAHE3/5B pinout, SMBJ15CAHE3/5B application, or SMBJ15CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant matte tin-plated terminals solderable per J-STD-002.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 16.7–18.5 V (min/max) under 1 mA test current. Its low incremental surge resistance ensures stable clamping during fast transients, while the glass-passivated junction delivers consistent response time <1 ps and excellent reliability under repetitive surge stress.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak, and its SMB package supports automated placement. The AEC-Q101 qualification (indicated by HE3 suffix) confirms suitability for automotive-grade applications requiring enhanced robustness against ESD, EFT, and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 16.7–18.5 V @ IT = 1 mA - Confirmed bidirectional conduction threshold; ensures symmetrical protection behavior. |
| VC (Clamping Voltage) | 24.4 V @ IPPM = 24.6 A - Peak voltage seen by protected circuit during 600 W transient; critical for downstream IC survivability. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Sustains high-energy transients without failure; derates linearly above 25 °C ambient. |
| IPPM (Peak Pulse Current) | 24.6 A - Maximum non-repetitive surge current the device can divert while maintaining VC ≤ 24.4 V. |
| TJmax | +150 °C - Maximum junction temperature; enables operation in high-ambient environments such as engine control units or industrial drives. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements. |
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, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal serves as anode or cathode depending on transient polarity; eliminates orientation concerns during layout. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust suppression of high-energy transients from inductive switching or lightning surges without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including body control modules and ADAS sensor interfaces where reliability is mission-critical. |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V or 5 V logic lines within safe operating limits during surge events. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability across temperature and lifetime. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate drivers and microcontroller I/O lines from voltage spikes generated by relay coil de-energization or PWM motor current interruption. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector or IC input pins to limit transient excursions to ≤24.4 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic circuits while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding LIN bus transceivers and door module sensors against load dump and jump-start induced surges in 12 V vehicle systems. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on power and data lines, operating alongside ceramic capacitors for sub-100 ns response. Use Value: Meets ISO 7637-2 Pulse 1/2a/5a immunity requirements without requiring additional series impedance or filtering stages. |
| Telecom Power Supply Inputs | Consumer Sensor Signal Lines |
|
Use Scenario: Clamping induced transients on 48 V DC input rails of PoE-powered switches and base station power converters. IC Role / Device Role / Timing Role: Secondary-level surge protection after bulk MOVs, absorbing residual energy that passes through upstream stages. Use Value: Limits voltage overshoot to <25 V during 600 W surges, preventing overvoltage shutdown or capacitor degradation in DC-DC controllers. |
Use Scenario: Shielding analog outputs of temperature/humidity sensors from ESD events during handling or system integration. IC Role / Device Role / Timing Role: Low-capacitance (typ. 250 pF at 0 V) bidirectional clamp placed adjacent to sensor IC output pin. Use Value: Maintains signal fidelity up to 1 MHz while suppressing ±8 kV contact ESD per IEC 61000-4-2 without distorting low-level analog waveforms. |
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 | Same electrical specs and package; halogen-free, RoHS-compliant, commercial grade (not AEC-Q101 qualified). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive compliance needs and supply chain allows non-HE3 variants. |
| SMAJ15CAHE3/A | Lower peak pulse power (400 W vs. 600 W); SMA (DO-214AC) package with smaller footprint and higher RθJA (140 °C/W). | Reduced surge handling capacity; requires tighter thermal management and is less robust for high-energy transients. | Choose only if board space is constrained and worst-case surge energy remains below 400 W capability. |
Compared with SMBJ15CAHE3/5B, the M3/5B alternative offers identical protection performance without automotive qualification, while the SMAJ15CAHE3/A trades 33 % lower pulse power and inferior thermal performance for smaller size - neither is pin-compatible due to differing package outlines (SMB vs. SMA).
Availability
SMBJ15CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with full traceability and lifecycle support.
Supply support for SMBJ15CAHE3/5B 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, 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 ESD, EFT, and lightning surges is mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ15CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ15CAHE3/5B provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SMBJ15A). This eliminates polarity marking on PCBs and simplifies layout for AC-coupled or differential signal lines where transient direction is unpredictable.
Is SMBJ15CAHE3/5B suitable for automotive applications?
Yes - the "HE3" suffix confirms SMBJ15CAHE3/5B is AEC-Q101 qualified, having passed stress tests for temperature cycling, humidity, mechanical shock, and surge robustness required for automotive electronics. It is commonly used in body control modules, lighting controllers, and sensor interfaces meeting ISO 16750 and ISO 7637-2 standards.
What is the maximum clamping voltage of SMBJ15CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ15CAHE3/5B is 24.4 V at 24.6 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for determining safe voltage margins for downstream ICs protected by SMBJ15CAHE3/5B.
How does the SMB package of SMBJ15CAHE3/5B compare to SMA in terms of thermal performance?
SMBJ15CAHE3/5B in SMB (DO-214AA) package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads, whereas SMA-packaged equivalents like SMAJ15CAHE3/A exhibit ~140 °C/W. This 40 % lower thermal resistance allows SMBJ15CAHE3/5B to sustain higher surge repetition rates or operate reliably in hotter ambient environments.
Does SMBJ15CAHE3/5B require orientation during PCB placement?
No - SMBJ15CAHE3/5B is a bidirectional TVS diode with no polarity marking on the SMB package. Both terminals are functionally identical, so PCB layout does not require orientation alignment. This simplifies automated placement and reduces risk of assembly errors compared to unidirectional variants that must be oriented with the cathode band toward the protected line.
SMBJ15CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ15CAHE3/5B FAQ
1.How can I place an order for SMBJ15CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHE3/5B 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 SMBJ15CAHE3/5B reliable?
The price and inventory of SMBJ15CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHE3/5B?
SMBJ15CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHE3/5B 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 SMBJ15CAHE3/5B?
For technical support, including SMBJ15CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ15CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHE3/5B 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 SMBJ15CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHE3/5B?
All SMBJ15CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHE3/5B, 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 SMBJ15CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ15CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHE3/5B Tags
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