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Vishay General Semiconductor - Diodes Division SMBJ15A/54
- Part No.:
- SMBJ15A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15A/54.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
SMBJ15A/54 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 15 V standoff voltage (VWM), 16.7–18.5 V breakdown range at 1 mA, clamps transients to ≤24.4 V at 24.6 A peak pulse current (10/1000 µs), and delivers 600 W peak pulse power - deployed in automotive body control modules, industrial PLC I/O protection, and telecom power supply inputs.
For engineers reviewing the SMBJ15A/54 datasheet, SMBJ15A/54 pinout, SMBJ15A/54 application, or SMBJ15A/54 equivalent, this page provides verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The SMBJ15A/54 operates as a unidirectional avalanche diode with cathode-band polarity marking. Its silicon junction is glass passivated for stable leakage performance and long-term reliability under repetitive surge stress. The device responds in <1 ps to transient events and maintains low incremental surge resistance (<0.5 Ω typical) during clamping.
Thermal management relies on its SMB (DO-214AA) package with RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W. It supports continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for protected line voltage. |
| VBR min/max | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 24.6 A (10/1000 µs) - Clamped voltage seen by downstream circuitry; defines worst-case stress on protected ICs. |
| PPPM | 600 W - Peak transient power dissipation capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| IFSM | 100 A (8.3 ms half-sine) - Surge current handling for AC line fault conditions; supports input rectifier stage protection. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments without derating. |
| Leakage ID | 1.0 µA at 15 V - Ultra-low reverse leakage preserves battery life in always-on systems and avoids false triggering. |
Pinout & Package
Package: SMB (DO-214AA) - Surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during transient clamp event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to 4 kV in 2 Ω source impedance configurations. |
| Low clamping voltage ratio (VC/VWM ≈ 1.63) | Minimizes voltage overshoot across protected components - critical for safeguarding 16 V-rated automotive MCUs and CAN transceivers. |
| AEC-Q101 qualified option available | HE3/HM3 suffix variants meet automotive qualification for use in engine control units, ADAS sensors, and infotainment power supplies. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly using J-STD-002 solderability standards. |
| Glass passivated junction | Ensures stable VBR and leakage over 10+ years in harsh environments - validated for >1000 surge cycles at rated IPPM. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protects 12 V supply rail in BCM against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 12 V input and local LDO regulator input. Use Value: Limits transient voltage to ≤24.4 V, preventing damage to 3.3 V/5 V microcontrollers and LIN transceivers downstream. |
Use Scenario: Shields 24 V digital input channel from field-wiring induced surges (IEC 61000-4-4 EFT, IEC 61000-4-5 surge). IC Role / Device Role / Timing Role: Primary front-end clamp before optocoupler or Schmitt-trigger input buffer. Use Value: Absorbs 600 W pulses without degradation, maintaining signal integrity and enabling >100 k-cycle field reliability. |
| Telecom Power Supply Input | Consumer Appliance Motor Driver |
|
Use Scenario: Safeguards AC/DC adapter output against lightning-induced surges entering via PoE or external DC jack. IC Role / Device Role / Timing Role: Secondary-side TVS on +48 V or +24 V output rail before DC-DC converter stage. Use Value: Clamps to 24.4 V within nanoseconds, preventing latch-up or gate oxide rupture in downstream PMICs and FET drivers. |
Use Scenario: Suppresses inductive kickback from brushed DC motor commutation in washing machine or HVAC blower circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge high-side FET drain-source. Use Value: Handles repetitive 100 A surge peaks (8.3 ms) without parameter shift, extending motor driver IC lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Bidirectional variant with same VWM (15 V), symmetric clamping in both polarities; VC = 24.4 V at ±24.6 A. | Required for AC-coupled signal lines (e.g., RS-485, USB D+/D−) where polarity reversal occurs. | Select SMBJ15CA only when bidirectional protection is mandated; SMBJ15A/54 is optimal for DC rails with defined polarity. |
| SMAJ15A | Lower peak power rating (400 W vs. 600 W); identical VWM, VBR, and VC, but smaller SMA (DO-214AC) package with higher RθJA (140 °C/W). | Suitable for space-constrained consumer boards with lower surge threat levels (IEC 61000-4-5 Level 2). | Choose SMAJ15A only if board area is critical and surge energy is limited; SMBJ15A/54 provides 50 % higher energy margin and better thermal performance. |
Compared with SMBJ15CA and SMAJ15A, the SMBJ15A/54 delivers superior single-polarity surge handling (600 W), lower thermal resistance, and automotive-qualified variants - making it the preferred choice for high-reliability 12–24 V DC systems requiring sustained surge immunity.
Availability
SMBJ15A/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMBJ15A/54 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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in automotive, industrial, and communications infrastructure - delivering consistent clamping performance across temperature and lifetime while meeting stringent AEC-Q101 and RoHS requirements.
FAQ
What is the maximum clamping voltage of SMBJ15A/54 under a 10/1000 µs surge?
The SMBJ15A/54 clamps to a maximum of 24.4 V when subjected to its rated peak pulse current of 24.6 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88392, ensuring predictable overvoltage limiting for downstream 24 V-tolerant ICs. The SMBJ15A/54 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBJ15A/54 suitable for automotive applications?
Yes - the SMBJ15A/54 itself is commercial-grade, but Vishay offers AEC-Q101-qualified versions under ordering codes SMBJ15AHE3 and SMBJ15AHM3 (with HE3/HM3 suffixes). These variants undergo stress testing per AEC-Q101 Rev D and are approved for under-hood and chassis-mounted automotive systems. The SMBJ15A/54 shares identical electrical specs and SMB package with these qualified parts, enabling drop-in validation.
How does SMBJ15A/54 differ from SMBJ15A without the "/54" suffix?
The "/54" suffix in SMBJ15A/54 denotes a specific tape-and-reel packaging configuration - 7" diameter reel, 750-unit quantity, with E3 (RoHS-compliant) termination. Electrically and mechanically, SMBJ15A/54 is identical to SMBJ15A-E3/52 or SMBJ15A-E3/5B. The core device remains the same unidirectional 15 V TVS diode in SMB (DO-214AA) package; only packaging and reel logistics differ.
What is the reverse leakage current of SMBJ15A/54 at its standoff voltage?
At VWM = 15 V and TA = 25 °C, the SMBJ15A/54 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage is critical for battery-powered systems and high-impedance sensor interfaces, minimizing standby power loss and avoiding false triggering in precision analog circuits. The SMBJ15A/54 maintains leakage <5 µA up to 80 % of VWM across its full temperature range.
Can SMBJ15A/54 be used in bidirectional signal protection?
No - SMBJ15A/54 is strictly unidirectional and must be installed with correct polarity (cathode toward the protected line). For bidirectional signal lines such as RS-485, CAN, or USB, the SMBJ15CA variant is required. Attempting to use SMBJ15A/54 on AC or polarity-agnostic signals will result in forward conduction during negative half-cycles, causing failure. Always verify polarity alignment before placement.
SMBJ15A/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ15A/54 FAQ
1.How can I place an order for SMBJ15A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15A/54 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 SMBJ15A/54 reliable?
The price and inventory of SMBJ15A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15A/54 is usually 5 days.
3.What payment methods are accepted for SMBJ15A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15A/54?
SMBJ15A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15A/54 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 SMBJ15A/54?
For technical support, including SMBJ15A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15A/54 requirements.
6.How does Aetrix verify that SMBJ15A/54 is sourced from the original manufacturer or authorized distributors?
All SMBJ15A/54 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 SMBJ15A/54 meets industry standards.
7.What is the process for return or replacement of SMBJ15A/54?
All SMBJ15A/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15A/54, 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 SMBJ15A/54 part is unused and in its original packaging.
Return procedure for SMBJ15A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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