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Vishay General Semiconductor - Diodes Division SMBJ170A-E3/5B
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- Part No.:
- SMBJ170A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170A-E3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,839
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Product details
Overview
SMBJ170A-E3/5B 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 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ170A-E3/5B datasheet, SMBJ170A-E3/5B pinout, SMBJ170A-E3/5B application, or SMBJ170A-E3/5B equivalent, this page delivers verified electrical parameters, thermal behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and real-world protection use cases - all aligned with Vishay's 88392 specification revision (Jan 2024).
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device triggered by transient overvoltage events exceeding its reverse stand-off voltage of 170 V. Its silicon junction exhibits low incremental surge resistance and sub-nanosecond response time, enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), has a maximum junction temperature of +150 °C, and achieves thermal resistance of 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads - confirming suitability for compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 170 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown) | 189–209 V at 1 mA - guaranteed conduction onset range for reliable overvoltage triggering |
| VC (Clamping) | 275 V at IPPM = 2.2 A - peak voltage seen by protected circuit during 10/1000 µs transient |
| PPPM | 600 W - surge energy handling capacity with 0.01 % duty cycle, critical for repetitive transient environments |
| IFSM | 100 A - single half-sine surge current rating, supporting robust protection against motor or relay switching events |
| TJ max. | +150 °C - enables operation in high-temperature industrial enclosures without derating penalties |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; defines directionality of clamping action |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential rail; conducts when transient exceeds VWM, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables protection against high-energy transients (e.g., ISO 7637-2 Pulse 5a) without thermal runaway |
| 275 V clamping at 2.2 A | Limits voltage stress on downstream 200 V-rated MOSFETs or 300 V-rated capacitors during surge events |
| 100 A IFSM rating | Supports protection of high-current DC bus lines subject to inductive kickback from solenoids or motors |
| MSL Level 1 moisture sensitivity | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and process complexity |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance for long-term reliability |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and DC-link sensing circuits against voltage spikes from IGBT switching and transformer leakage inverter stages. IC Role / Device Role / Timing Role: Unidirectional clamping element placed across DC bus or gate resistor network to limit transient overshoot. Use Value: Prevents false triggering or avalanche failure in 600 V IGBTs by holding transient voltage below 275 V during 10/1000 µs surges. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side distribution rails feeding PMICs and FPGA power sequencing ICs. Use Value: Maintains system uptime by absorbing 600 W surges without degradation, meeting GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Standoff-clamp TVS on power input and data lines, coordinated with upstream fuses for fault isolation. Use Value: Survives 12 V system load dump pulses (ISO 16750-2) up to 35 V for 400 ms while maintaining <1 µA leakage at 170 V. |
Use Scenario: Shielding analog front-end amplifiers and ADC inputs in pressure/temperature sensor modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) unidirectional suppressor placed directly at connector interface before signal conditioning stage. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <275 V within <1 ns, preserving 16-bit measurement accuracy in 0.1% tolerance bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy | Direct substitution if halogen-free materials required; same thermal and clamping performance |
| SMCJ170A-E3/57 | Higher-power SMC (DO-214AB) package with 1500 W PPPM, same VWM/VC ratings | Used where higher surge margin or improved thermal dissipation is needed in space-permitting designs | Choose when system-level surge testing exceeds 600 W or board layout allows larger footprint |
Compared with SMBJ170A-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the SMCJ170A-E3/57 provides 2.5× higher surge power handling in a larger package - enabling design flexibility between footprint-constrained and high-reliability surge environments.
Availability
SMBJ170A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and full traceability.
Supply support for SMBJ170A-E3/5B 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive electronics where consistent clamping and long-term stability are mission-critical.
FAQ
What is the maximum clamping voltage of SMBJ170A-E3/5B under standard test conditions?
The SMBJ170A-E3/5B has a maximum clamping voltage (VC) of 275 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 2.2 A. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170A-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ170A-E3/5B suitable for automotive applications?
The SMBJ170A-E3/5B is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the automotive variant SMBJ170AHE3_B/I with identical electrical characteristics and AEC-Q101 qualification. For non-automotive industrial or telecom use, the SMBJ170A-E3/5B meets all functional requirements - including 100 A IFSM, 600 W PPPM, and 150 °C TJ max - but lacks automotive-specific qualification documentation.
What does the "E3/5B" suffix indicate in SMBJ170A-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance. The "5B" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units - optimized for high-volume SMT placement. This differs from "52" (7-inch reel, 750 units) and "HE3" (AEC-Q101 qualified version).
How does SMBJ170A-E3/5B compare to bidirectional TVS diodes like SMBJ170CA?
The SMBJ170A-E3/5B is unidirectional and intended for DC line protection where polarity is fixed; it conducts only in reverse bias above VWM. In contrast, SMBJ170CA is bidirectional with symmetrical clamping in both directions, suited for AC lines or differential signal pairs. Both share identical VWM (170 V), VC (275 V), and PPPM (600 W), but SMBJ170A-E3/5B offers lower leakage (<1 µA at 170 V) and supports forward surge current (IFSM = 100 A), which SMBJ170CA does not specify.
What is the thermal resistance of SMBJ170A-E3/5B, and how does it affect PCB layout?
The SMBJ170A-E3/5B 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. To maintain safe junction temperatures during repeated surges, designers must provide adequate copper area and avoid excessive trace length. Reducing pad size or omitting thermal vias increases RθJA, potentially causing premature thermal shutdown or parametric shift - the SMBJ170A-E3/5B datasheet specifies derating curves in Figure 2 for elevated ambient conditions.
SMBJ170A-E3/5B 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- 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)
SMBJ170A-E3/5B FAQ
1.How can I place an order for SMBJ170A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170A-E3/5B 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 SMBJ170A-E3/5B reliable?
The price and inventory of SMBJ170A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170A-E3/5B?
SMBJ170A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170A-E3/5B 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 SMBJ170A-E3/5B?
For technical support, including SMBJ170A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170A-E3/5B requirements.
6.How does Aetrix verify that SMBJ170A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170A-E3/5B 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 SMBJ170A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170A-E3/5B?
All SMBJ170A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170A-E3/5B, 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 SMBJ170A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ170A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170A-E3/5B Tags
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