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Vishay General Semiconductor - Diodes Division SMBJ15AHE3_B/I
- Part No.:
- SMBJ15AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15AHE3_B/I.pdf
- Description:
- 600W,15V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,149
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Product details
Overview
SMBJ15AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. 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 capability with 10/1000 µs waveform - deployed in automotive power rail protection, industrial sensor interface circuits, and DC-DC converter input stages.
For engineers reviewing the SMBJ15AHE3_B/I datasheet, SMBJ15AHE3_B/I pinout, SMBJ15AHE3_B/I application, or SMBJ15AHE3_B/I equivalent, this device is selected for robust ESD and surge immunity in AEC-Q101-compliant systems where low clamping voltage, fast response (<1 ns), and stable thermal performance up to 150 °C junction temperature are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 16.7–18.5 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at 15 V) and repeatable clamping behavior under repetitive surge conditions.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation on standard 0.2" × 0.2" copper pads without forced cooling. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
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 at 1 mA - Confirmed avalanche onset range; ensures predictable triggering during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V at 24.6 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capacity per IEC 61000-4-5 Level 4 surge testing. |
| IPPM (Peak Pulse Current) | 24.6 A - Maximum non-repetitive surge current handled without degradation; validated per Fig. 1 derating curve. |
| TJ max. | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount footprint with 5.59 mm × 4.06 mm body; compatible with automated placement and reflow soldering (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Surge sensing node | Connected to protected line (e.g., 12 V rail); avalanche conduction initiates here when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies; meets stress test requirements for temperature cycling, HTRB, and surge endurance. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to ±1 kV open-circuit / ±500 A short-circuit without failure. |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage exposure to protected ICs - e.g., keeps microcontroller I/O pins below absolute maximum ratings during load dump. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) across -55 °C to +150 °C; prevents parameter drift in harsh environments. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; supports high-yield manufacturing for automotive Tier 1 suppliers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 load dump pulses (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp transients before they reach LDOs or MCU power pins. Use Value: Limits peak voltage to 24.4 V during 24.6 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic rails downstream. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules from EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA current loop output lines to suppress fast transients without distorting signal integrity. Use Value: Clamps sub-100 ns ESD events to <25 V while maintaining <1 µA leakage at 15 V, preserving sensor accuracy and long-term calibration stability. |
| DC-DC Converter Input Stage | Telecom Power Supply Front-End |
|
Use Scenario: Safeguarding buck converter inputs in PoE-powered devices against induced surges from Ethernet cable coupling. IC Role / Device Role / Timing Role: Primary transient shunt on 48 V input rail upstream of input filter capacitor and controller IC. Use Value: Absorbs 600 W surge energy within 1000 µs window, reducing voltage overshoot to <25 V and avoiding overvoltage shutdown of controller ICs. |
Use Scenario: Secondary-level surge suppression in AC/DC adapters for VoIP phones subjected to lightning-induced surges on AC mains. IC Role / Device Role / Timing Role: Final-stage TVS on DC output (e.g., 12 V) to protect connected phone circuitry after primary MOV and fuse stages. Use Value: Provides precise 24.4 V clamping with minimal leakage, ensuring no standby current drain while meeting UL 497B protector classification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15AHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected only when halogen-free material compliance is mandated by OEM environmental policy. | Choose SMBJ15AHM3_B/I if RoHS + halogen-free certification is required; otherwise SMBJ15AHE3_B/I satisfies standard automotive and industrial use cases. |
| SMAJ15AHE3/A | Lower power rating (400 W vs. 600 W), smaller SMA (DO-214AC) package, higher RθJA (150 °C/W), same VWM/VC values. | Suitable for space-constrained consumer electronics but not recommended for automotive or industrial surge levels exceeding 400 W. | Select SMBJ15AHE3_B/I over SMAJ15AHE3/A when full 600 W IEC 61000-4-5 compliance or AEC-Q101 validation is required. |
Compared with SMBJ15AHM3_B/I, SMBJ15AHE3_B/I offers identical protection performance with standard RoHS compliance; versus SMAJ15AHE3/A, it delivers 50 % higher surge power handling and superior thermal robustness - making it the preferred choice for mission-critical automotive and industrial deployments.
Availability
SMBJ15AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply front-ends requiring stable component supply with AEC-Q101 traceability and long-lifecycle support.
Supply support for SMBJ15AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping, low leakage, and AEC-Q101 validation across voltage grades from 5.0 V to 188 V.
FAQ
What is the clamping voltage of SMBJ15AHE3_B/I at its rated peak pulse current?
The SMBJ15AHE3_B/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 24.6 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and reflects the actual voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ15AHE3_B/I suitable for automotive applications?
Yes, SMBJ15AHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS compliance and automotive-grade reliability testing. It is deployed in engine control modules, body electronics, and ADAS power supplies where sustained operation from -55 °C to +150 °C and immunity to load dump and ISO 7637-2 transients are required - confirmed in Vishay's qualification report referenced in document 88392.
What does the "B/I" suffix mean in SMBJ15AHE3_B/I?
The "B/I" suffix in SMBJ15AHE3_B/I denotes packaging configuration: "B" indicates tape-and-reel format with embossed carrier tape, and "I" specifies a 13-inch reel containing 3200 units. This matches Vishay's ordering code convention in Table "ORDERING INFORMATION" (page 3 of document 88392), ensuring compatibility with high-speed pick-and-place equipment used in automotive electronics manufacturing.
How does SMBJ15AHE3_B/I differ from bidirectional variants like SMBJ15CA?
SMBJ15AHE3_B/I is unidirectional and features a cathode band marking, intended for DC line protection where polarity is fixed. In contrast, SMBJ15CA is bidirectional with no polarity marking and symmetric clamping in both directions - used in AC-coupled or floating signal lines. Electrical differences include higher ID leakage for SMBJ15CA at low VWM, and distinct VBR symmetry; SMBJ15AHE3_B/I must not be substituted for SMBJ15CA without verifying circuit polarity and surge directionality.
What is the thermal resistance of SMBJ15AHE3_B/I, and how does it affect PCB layout?
SMBJ15AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in the "THERMAL CHARACTERISTICS" table (page 3 of document 88392). To maintain safe junction temperatures during repetitive surges, PCB layout must replicate this pad area; reducing pad size increases thermal impedance and risks exceeding the 150 °C TJ limit during sustained transient activity.
SMBJ15AHE3_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:
- 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:
- 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)
SMBJ15AHE3_B/I FAQ
1.How can I place an order for SMBJ15AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15AHE3_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 SMBJ15AHE3_B/I reliable?
The price and inventory of SMBJ15AHE3_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 SMBJ15AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ15AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15AHE3_B/I?
SMBJ15AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15AHE3_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 SMBJ15AHE3_B/I?
For technical support, including SMBJ15AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ15AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15AHE3_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 SMBJ15AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ15AHE3_B/I?
All SMBJ15AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15AHE3_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 SMBJ15AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ15AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15AHE3_B/I Tags
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