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Vishay General Semiconductor - Diodes Division SMBJ170AHE3_A/H
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- Part No.:
- SMBJ170AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHE3_A/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,788
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Product details
Overview
SMBJ170AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping high-energy 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 and telecom infrastructure.
For engineers reviewing the SMBJ170AHE3_A/H datasheet, SMBJ170AHE3_A/H pinout, SMBJ170AHE3_A/H application, or SMBJ170AHE3_A/H equivalent, this part delivers AEC-Q101 qualified surge protection with low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly and high-reliability board-level ESD/transient immunity design.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device in reverse-biased configuration, activating only when transient voltage exceeds its VWM of 170 V and triggering avalanche conduction above VBR (min 189 V). Its 275 V clamping voltage at 2.2 A ensures downstream components remain below safe operating limits during standardized 10/1000 µs surges.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020, with lead-free, halogen-free (HE3 suffix), and automotive-qualified construction verified per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 189–209 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 275 V at IPPM = 2.2 A (10/1000 µs) - Actual voltage seen by protected circuit under rated surge; defines safe stress limit. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for transient suppression without failure under standard test waveform. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands non-repetitive line-frequency surge events common in AC input stages. |
| TJ max. | +150 °C - Enables use in high-temperature environments such as enclosed power converters or automotive under-hood modules. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 3.94 mm footprint and 2.2 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), cathode-band marked end denotes the cathode terminal. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point; completes clamping path during reverse transient. |
| Cathode | Protected line input | Connected to line being protected (e.g., DC bus or signal trace); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - supports under-hood and ADAS power rail protection. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω coupling) without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - critical for protecting 200 V-rated MOSFETs and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and reflow compatibility up to 260 °C peak - eliminates baking requirements in high-volume SMT lines. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and lifetime - reduces field failure risk in industrial equipment. |
Applications
| Industrial Motor Drives | Telecom DC Power Distribution |
|---|---|
|
Use Scenario: Protection of IGBT gate driver supply rails against switching-induced transients in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between isolated DC bias rail and ground. Use Value: Limits gate-source voltage spikes to ≤275 V, preventing unintended IGBT turn-on and ensuring reliable PWM control integrity. |
Use Scenario: Surge suppression on -48 V telecom backup power feeds entering base station RF modules. IC Role / Device Role / Timing Role: Primary transient shunt on input side of DC-DC converter front-end. Use Value: Clamps lightning-induced surges to safe levels within 1 ns, preserving converter controller ICs and enabling compliance with GR-1089-CORE. |
| Automotive Body Control Modules | Industrial PLC Analog Input Protection |
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail upstream of LDO regulators. Use Value: Survives ISO 7637-2 Pulse 5a (75 V/350 ms) with <1 µA leakage at 170 V - maintains system uptime during battery replacement events. |
Use Scenario: Shielding 4–20 mA current loop inputs from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (with series resistor) on signal line to ADC front-end. Use Value: Provides <10 pF junction capacitance at zero bias - avoids signal distortion in 10 kHz bandwidth analog channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHM3_A/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference - selected where halogen-free compliance is mandated by OEM environmental policy. | Direct substitution if halogen-free materials are required; no layout or validation changes needed. |
| SMCJ170AHE3_A/H | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (3.5 A). | Used where higher surge margin is needed (e.g., outdoor telecom cabinets or solar inverter DC inputs) and PCB space allows larger footprint. | Choose when surge energy exceeds 600 W requirement; requires PCB pad revision due to larger SMC outline. |
Compared with SMBJ170AHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ170AHE3_A/H provides 2.5× higher surge power handling in a physically larger package - enabling robustness upgrades without changing circuit topology.
Availability
SMBJ170AHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC power distribution, automotive body control modules, and PLC analog input protection requiring stable component supply and AEC-Q101-qualified surge immunity.
Supply support for SMBJ170AHE3_A/H 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 developed for high-power, surface-mount transient suppression in space-constrained industrial and automotive systems - delivering consistent clamping performance with automated assembly compatibility and extended thermal endurance.
FAQ
What is the maximum clamping voltage of SMBJ170AHE3_A/H at its rated peak pulse current?
The SMBJ170AHE3_A/H has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current of 2.2 A using the 10/1000 µs waveform. This value is measured under standardized test conditions with specified mounting (0.2" × 0.2" copper pads) and confirms the upper voltage limit imposed on protected circuits during transient events. The SMBJ170AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ170AHE3_A/H qualified for automotive applications?
Yes, SMBJ170AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making SMBJ170AHE3_A/H suitable for automotive body electronics, powertrain subsystems, and ADAS power rail protection where reliability under harsh conditions is mandatory.
What is the standoff voltage and how does it relate to system design for SMBJ170AHE3_A/H?
The standoff voltage (VWM) of SMBJ170AHE3_A/H is 170 V - the maximum continuous reverse voltage the device can block without exceeding 1 µA leakage current. In system design, VWM must exceed the normal operating voltage of the protected line (e.g., 150 V DC bus) with sufficient margin to avoid false triggering, while remaining below VBR to ensure controlled avalanche activation only during transients. This balance defines the usable voltage window for reliable SMBJ170AHE3_A/H deployment.
Does SMBJ170AHE3_A/H have polarity marking, and how is it identified?
Yes, SMBJ170AHE3_A/H is unidirectional and features a visible cathode band on the SMB (DO-214AA) package body - located at the cathode end. Per Vishay's mechanical drawings and datasheet notes, this band aligns with the cathode terminal, which must be connected to the line being protected, while the anode connects to ground or reference potential. Correct orientation is essential for proper clamping function; reverse installation renders the device ineffective against positive transients.
What is the thermal resistance and how does it affect SMBJ170AHE3_A/H layout?
SMBJ170AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, PCB layout must provide adequate copper area and minimize trace resistance - undersized pads or thin traces will elevate junction temperature and reduce surge endurance. Thermal performance directly impacts long-term reliability in high-ambient environments.
SMBJ170AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170AHE3_A/H FAQ
1.How can I place an order for SMBJ170AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHE3_A/H 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 SMBJ170AHE3_A/H reliable?
The price and inventory of SMBJ170AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ170AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHE3_A/H?
SMBJ170AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHE3_A/H 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 SMBJ170AHE3_A/H?
For technical support, including SMBJ170AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ170AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHE3_A/H 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 SMBJ170AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ170AHE3_A/H?
All SMBJ170AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHE3_A/H, 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 SMBJ170AHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ170AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHE3_A/H Tags
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