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Vishay General Semiconductor - Diodes Division SMBJ15D-M3/I
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- Part No.:
- SMBJ15D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15D-M3/I.pdf
- Description:
- TVS DIODE 15VWM 24VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,484
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Product details
Overview
SMBJ15D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 15 V stand-off voltage (VWM), 17.0–18.2 V breakdown voltage (VBR) at 1 mA, 24.0 V clamping voltage (VC) at 25.0 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in DC power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ15D-M3/I datasheet, SMBJ15D-M3/I pinout, SMBJ15D-M3/I application, or SMBJ15D-M3/I equivalent, this page delivers verified electrical parameters, package mapping to SMB (DO-214AA), polarity marking convention, clamping performance under surge conditions, and validated alternatives for circuit-level ESD and lightning-induced transient suppression.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (17.0–18.2 V), it avalanches to limit transient energy across protected nodes. Its low incremental surge resistance and fast response time ensure sub-nanosecond turn-on during ESD or inductive switching events.
Designed for surface-mount assembly on standard PCB pads, SMBJ15D-M3/I complies with MSL level 1 per J-STD-020, supports reflow up to 260 °C peak, and uses matte tin-plated leads solderable per J-STD-002. The cathode band denotes polarity, critical for correct orientation in DC-biased protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - maximum continuous reverse operating voltage before leakage rises significantly; sets upper limit for normal DC bias operation. |
| VBR (Breakdown Voltage) | 17.0–18.2 V at 1.0 mA - precise avalanche initiation range enabling tight overvoltage margin control in 12 V systems. |
| VC (Clamping Voltage) | 24.0 V at 25.0 A IPPM - peak voltage seen by protected IC during 10/1000 μs surge; ensures downstream logic remains below absolute max ratings. |
| PPPM (Peak Pulse Power) | 600 W - surge energy handling capacity under standardized 10/1000 μs waveform; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| ID (Reverse Leakage) | ≤0.5 μA at VWM - negligible standby current draw, preserving battery life and avoiding false triggering in low-power sensor nodes. |
| TJ max | 150 °C - maximum junction temperature rating supporting operation in industrial enclosures without forced cooling. |
| RθJA | 125 °C/W - thermal resistance from junction to ambient on minimum recommended pad layout; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, M3 industrial grade. Cathode indicated by molded band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes shunt path during avalanche conduction. |
| Cathode | High-side surge input terminal | Marked with band; connects to line being protected (e.g., 12 V rail or RS-485 A/B); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables predictable clamping threshold across production lots, reducing design margin uncertainty in 12 V automotive or industrial power domains. |
| 600 W PPPM (10/1000 μs) | Supports compliance with IEC 61000-4-5 surge immunity requirements for Class B/C equipment without external series impedance. |
| Low leakage (≤0.5 μA) | Prevents measurable loading on high-impedance sensor outputs or battery-backed circuits during normal operation. |
| MSL Level 1, 260 °C peak reflow | Allows single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination risk. |
| SMB footprint compatibility | Shares land pattern with industry-standard DO-214AA devices, enabling drop-in replacement in existing layouts for legacy TVS upgrades. |
Applications
| Industrial Sensor Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure/temperature sensors exposed to load dump transients in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between sensor output and ground, activated only during positive-going surges exceeding 15 V. Use Value: Limits voltage excursion to ≤24.0 V during 25 A 10/1000 μs surge, preventing damage to 24 V-tolerant ADC inputs while adding <1 pF capacitance. |
Use Scenario: Safeguarding LIN bus transceiver power supply pins against battery disconnection spikes in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V VCC rail, clamping transients induced by relay coil de-energization within 1 ns. Use Value: Maintains system uptime by suppressing >100 V spikes to safe levels without latch-up or degradation after repeated 600 W pulses. |
| Telecom Power Interface | Consumer USB-C Port Protection |
|
Use Scenario: Shielding PoE-powered Ethernet switch port DC-DC converter inputs from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage unidirectional TVS on 48 V input rail, coordinated with upstream fuse and downstream MOV for staged energy absorption. Use Value: Handles 600 W peak power without thermal runaway, enabling compact design versus higher-wattage alternatives requiring heatsinking. |
Use Scenario: Guarding VBUS line of USB-C receptacles against ESD events and hot-swap overshoot in portable docking stations. IC Role / Device Role / Timing Role: Fast-response shunt element placed immediately adjacent to connector, referenced to system ground with minimal loop inductance. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <24 V within nanoseconds, protecting USB PD controller and power delivery ICs from latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-M3/I | Same VWM (15 V), identical SMB package, but ±5 % VBR tolerance (vs. ±3.5 % for SMBJ15D-M3/I). | Acceptable where tighter clamping consistency is not required; slightly lower cost in high-volume consumer designs. | Select SMBJ15A-M3/I only if VBR variation up to 19.0 V is acceptable in your 12 V system margin analysis. |
| SMCJ15A-M3/I | Same VWM and polarity, but SMC (DO-214AB) package - larger footprint, 1500 W PPPM rating, higher VC (24.4 V at 64.5 A). | Better suited for higher-energy threats (e.g., IEC 61000-4-5 Level 4), but requires PCB redesign due to 2.5× larger body size. | Choose SMCJ15A-M3/I when surge threat level exceeds 600 W or when long-term reliability under repetitive surges demands higher thermal mass. |
Compared with SMBJ15A-M3/I, SMBJ15D-M3/I offers tighter VBR control for precision clamping; compared with SMCJ15A-M3/I, it provides space-constrained protection without sacrificing core 15 V standoff or 24 V clamping performance.
Availability
SMBJ15D-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power supplies, and USB-C port protection requiring stable component supply and consistent surge performance across production batches.
Supply support for SMBJ15D-M3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMBJ series is engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - balancing low clamping voltage, tight VBR tolerance, and robust reflow survivability in DO-214AA packages.
FAQ
What is the clamping voltage of SMBJ15D-M3/I at its rated peak pulse current?
The SMBJ15D-M3/I has a maximum clamping voltage (VC) of 24.0 V at 25.0 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value defines the highest voltage imposed on protected circuitry during a full-rated surge event and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ15D-M3/I maintains this clamping performance consistently across its qualified temperature range.
Is SMBJ15D-M3/I unidirectional or bidirectional, and how is polarity identified?
SMBJ15D-M3/I is a unidirectional transient voltage suppressor, meaning it conducts only in reverse bias above its breakdown voltage. Polarity is marked by a cathode band on the device body - the banded end connects to the line being protected (e.g., 12 V rail), while the unbanded end connects to ground. This orientation is essential for proper operation; reversing it would prevent clamping during positive transients.
What package type does SMBJ15D-M3/I use, and what are its key mechanical attributes?
SMBJ15D-M3/I uses the SMB (DO-214AA) surface-mount package: 4.57 mm × 3.94 mm × 2.20 mm body size, matte tin-plated leads, UL 94 V-0 molding compound, and M3 industrial-grade construction. It meets JESD 201 class 2 whisker resistance and is rated MSL level 1 for reflow up to 260 °C peak - enabling reliable automated assembly without moisture sensitivity concerns.
How does the ±3.5 % VBR tolerance of SMBJ15D-M3/I impact circuit design?
The ±3.5 % breakdown voltage tolerance (17.0–18.2 V at 1 mA) allows precise margining between the SMBJ15D-M3/I's clamping onset and the protected IC's absolute maximum voltage rating. For example, in a 12 V system with a 20 V-rated microcontroller I/O, this tight tolerance ensures clamping initiates reliably before reaching dangerous levels - unlike wider-tolerance variants that could delay conduction or trigger prematurely.
Can SMBJ15D-M3/I be used in bidirectional signal line protection?
No - SMBJ15D-M3/I is strictly unidirectional and unsuitable for AC or bidirectional signal lines (e.g., RS-485, CAN, USB D+/D−) without additional circuitry. For such applications, Vishay's SMBJ15CD-M3/I (bidirectional variant) must be selected instead, as it provides symmetrical clamping in both polarities. Using SMBJ15D-M3/I on bidirectional lines risks failure during negative transients due to lack of forward conduction path.
SMBJ15D-M3/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):
- 17V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 25A
- 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)
SMBJ15D-M3/I FAQ
1.How can I place an order for SMBJ15D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15D-M3/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 SMBJ15D-M3/I reliable?
The price and inventory of SMBJ15D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ15D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15D-M3/I?
SMBJ15D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15D-M3/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 SMBJ15D-M3/I?
For technical support, including SMBJ15D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15D-M3/I requirements.
6.How does Aetrix verify that SMBJ15D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15D-M3/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 SMBJ15D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ15D-M3/I?
All SMBJ15D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15D-M3/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 SMBJ15D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ15D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15D-M3/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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