My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ17A-M3/5B
;;2.jpg)
- Part No.:
- SMBJ17A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17A-M3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,576
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ17A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection on DC power rails and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1.0 mA), 27.6 V clamping voltage (VC) at 21.7 A peak pulse current, and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, microcontrollers, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ17A-M3/5B datasheet, SMBJ17A-M3/5B pinout, SMBJ17A-M3/5B application, or SMBJ17A-M3/5B equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS compliance per M3 suffix - critical for automotive-grade and high-reliability embedded designs.
Technical Context
This TVS diode operates as a clamping device: under normal conditions it presents high impedance (>1 GΩ) with only 1.0 µA leakage at 17 V; during transients exceeding VBR, it avalanches rapidly (<1 ns response) to limit voltage to ≤27.6 V while conducting up to 21.7 A. Its low incremental surge resistance ensures minimal voltage overshoot during ESD or lightning-induced surges.
Thermally, it uses a glass-passivated silicon junction in an SMB package with RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation up to 150 °C junction temperature. The cathode band marking confirms unidirectional polarity, and its M3 suffix certifies halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1.0 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 27.6 V at 21.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines IC survivability. |
| IPPM (Peak Pulse Current) | 21.7 A - Maximum non-repetitive surge current the device can safely clamp without degradation. |
| PPPM (Peak Pulse Power) | 600 W - Energy-handling capacity for standardized 10/1000 µs transients; validates protection level per IEC 61000-4-5. |
| ID (Reverse Leakage) | ≤1.0 µA at 17 V - Negligible standby power loss and minimal loading on sensitive analog/sensor circuits. |
| TJmax | 150 °C - Enables use in under-hood automotive, industrial motor drives, and enclosed power converters. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by a single band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path); enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit terminal during reverse avalanche | Connected to protected line (e.g., 12 V rail); clamps transients to safe voltage by shunting surge current to anode/ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without failure. |
| 27.6 V clamping at 21.7 A | Ensures downstream 3.3 V/5 V logic and 20 V-rated MOSFETs remain within absolute maximum ratings during clamping. |
| 1.0 µA max reverse leakage at VWM | Prevents measurable current drain in battery-powered sensors or always-on monitoring circuits. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental mandates without compromising thermal or electrical performance. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting gate drivers and MCU I/O from inductive kickback during relay or solenoid switching in PLCs and VFDs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source, clamping negative-going transients below -0.7 V and positive surges to ≤27.6 V. Use Value: Prevents gate oxide rupture and logic upset by limiting transient voltage to <30 V while sustaining 21.7 A pulses without degradation. |
Use Scenario: Safeguarding LIN bus transceivers and power supply inputs in BCMs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Primary DC rail protector on 12 V input, positioned upstream of LDOs and CAN/LIN PHYs to absorb >400 W surges. Use Value: Maintains system uptime by clamping 12 V rail to 27.6 V during 100 ms load dump (ISO 7637-2 Pulse 5a), preventing brownout resets. |
| Consumer Power Adapter Output | Industrial Sensor Signal Conditioning |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs to meet UL 62368-1 surge immunity. IC Role / Device Role / Timing Role: Final-stage TVS across output capacitor, triggered only during fault conditions (e.g., feedback loop failure). Use Value: Limits output to 27.6 V during open-loop overvoltage, protecting connected smartphones and peripherals from damage. |
Use Scenario: Protecting 4–20 mA transmitter analog outputs and RS-485 data lines from ESD and field wiring transients in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) unidirectional clamp on signal line, referenced to local ground with fast <1 ns response. Use Value: Preserves signal integrity by suppressing ±8 kV contact ESD (IEC 61000-4-2) without distorting 10 kHz sensor bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-E3/5B | Same electrical specs and SMB package; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Approved for commercial-grade consumer electronics where halogen-free requirement is not mandated. | Select when cost sensitivity outweighs halogen-free compliance; identical layout and thermal behavior. |
| SMBJ17CA-M3/5B | Bidirectional variant: symmetric VBR (18.9–20.9 V), same VC (27.6 V), but supports AC or floating signal line protection. | Required for differential buses (e.g., RS-485), antenna ports, or any line lacking defined polarity reference. | Choose only if bidirectional clamping is needed; not a drop-in replacement due to polarity and circuit topology differences. |
Compared with SMBJ17A-M3/5B, the E3 variant trades halogen-free status for lower cost in non-automotive applications, while the 17CA variant enables AC-coupled protection but requires redesign of grounding and biasing - neither offers pin-compatible substitution without circuit review.
Availability
SMBJ17A-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, halogen-free compliance, and IEC 61000-4-5 surge immunity.
Supply support for SMBJ17A-M3/5B 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 was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and computing systems demanding AEC-Q101 readiness and robust surge handling.
FAQ
What is the clamping voltage of SMBJ17A-M3/5B at its rated peak pulse current?
The SMBJ17A-M3/5B has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 21.7 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry will not experience voltages exceeding 27.6 V during such transient events. The SMBJ17A-M3/5B achieves this clamping performance while maintaining low incremental surge resistance, ensuring consistent voltage limiting across multiple surge events.
Is SMBJ17A-M3/5B suitable for automotive applications?
Yes, SMBJ17A-M3/5B is halogen-free and RoHS-compliant per its M3 suffix, and the underlying SMBJ17A device is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes. While the M3/5B variant itself is commercial-grade, its electrical specs, thermal rating (TJmax = 150 °C), and mechanical robustness align with under-hood and body electronics requirements. For certified automotive use, specify SMBJ17A-HM3/5B - the SMBJ17A-M3/5B remains suitable for non-safety-critical automotive subsystems where qualification documentation is not mandatory.
How does the SMBJ17A-M3/5B differ from the SMBJ17CA-M3/5B?
The SMBJ17A-M3/5B is unidirectional, with a cathode band indicating polarity and optimized for DC rail protection where current flows in one direction. In contrast, SMBJ17CA-M3/5B is bidirectional, offering symmetrical breakdown and clamping in both polarities - essential for AC signals or floating lines like RS-485. Their VBR, VC, and PPPM match, but they are not interchangeable without modifying circuit grounding and biasing. The SMBJ17A-M3/5B cannot replace SMBJ17CA-M3/5B in bidirectional applications, and vice versa.
What is the reverse leakage current specification for SMBJ17A-M3/5B at its standoff voltage?
The SMBJ17A-M3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated standoff voltage (VWM) of 17 V and ambient temperature of 25 °C. This ultra-low leakage ensures minimal power loss in battery-backed or energy-sensitive systems and avoids loading precision analog sensor outputs. The value is confirmed in Vishay's official datasheet (Document Number: 88392, Rev. 09-Jan-2024) and remains stable up to 125 °C junction temperature, supporting reliable operation in thermally demanding environments.
What package type does SMBJ17A-M3/5B use, and what are its key mounting characteristics?
SMBJ17A-M3/5B uses the SMB (DO-214AA) surface-mount package: dimensions 4.57 mm × 3.94 mm × 2.20 mm, with coplanar matte tin-plated leads compliant with J-STD-002 solderability standards. It meets MSL Level 1 moisture sensitivity and withstands peak reflow temperatures up to 260 °C. The cathode is marked by a visible band, and thermal performance is characterized by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) - confirming suitability for automated placement and high-volume PCB assembly without derating concerns.
SMBJ17A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
SMBJ17A-M3/5B FAQ
1.How can I place an order for SMBJ17A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17A-M3/5B 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 SMBJ17A-M3/5B reliable?
The price and inventory of SMBJ17A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17A-M3/5B?
SMBJ17A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17A-M3/5B 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 SMBJ17A-M3/5B?
For technical support, including SMBJ17A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17A-M3/5B requirements.
6.How does Aetrix verify that SMBJ17A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17A-M3/5B 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 SMBJ17A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17A-M3/5B?
All SMBJ17A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17A-M3/5B, 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 SMBJ17A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ17A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17A-M3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
