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Vishay General Semiconductor - Diodes Division SMBJ170AHE3/52
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- Part No.:
- SMBJ170AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHE3/52.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,235
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Product details
Overview
SMBJ170AHE3/52 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ170AHE3/52 datasheet, SMBJ170AHE3/52 pinout, SMBJ170AHE3/52 application, or SMBJ170AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with DC power rails or parallel to sensitive inputs. Its glass-passivated junction enables fast response (<1 ns) to ESD and lightning-induced surges, while its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The SMBJ170AHE3/52 is rated for 5.0 W steady-state power dissipation at TA = 50 °C and supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine). Its MSL Level 1 moisture sensitivity and matte tin-plated leads meet J-STD-002 solderability requirements for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 189 V / 209 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 275 V at IPPM = 2.2 A (10/1000 µs) - Clamped voltage seen by downstream circuitry; determines residual stress on protected ICs. |
| PPPM | 600 W - Peak transient energy absorption capability; validates suitability for IEC 61000-4-5 Level 4 surge immunity. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments without derating. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode during reverse surge. |
| Cathode | Current exit terminal; marked with band | Connected to higher-potential side (e.g., VIN rail); reverse-biased during normal operation; conducts during overvoltage to shunt surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without degradation across 1000+ cycles. |
| Glass passivated chip junction | Ensures stable leakage performance (<1.0 µA at VWM) and long-term reliability under humidity and thermal stress. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring extended temperature and lifetime validation. |
| MSL Level 1, peak reflow 260 °C | Enables single-pass lead-free reflow without baking; compatible with standard SMT production lines. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and industrial surge protection devices; simplifies end-equipment certification. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate drivers and microcontroller I/O lines from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and external load interface to clamp negative-going transients below absolute maximum ratings. Use Value: Limits clamped voltage to 275 V, preventing latch-up or oxide damage in 3.3 V/5 V logic circuits exposed to >100 V spikes. |
Use Scenario: Safeguarding LIN bus transceivers and power supply inputs against load dump and jump-start surges in vehicle body electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V rail input to absorb 35 V/100 ms load dump pulses without triggering crowbar protection. Use Value: Withstands 100 A IFSM surge and maintains <1 µA leakage at 170 V, ensuring no battery drain during sleep mode. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protecting PoE-powered equipment front-end rectifiers and DC-DC controllers from lightning-induced common-mode surges on Ethernet pairs. IC Role / Device Role / Timing Role: Unidirectional TVS on secondary-side DC output of isolated flyback converter to suppress differential-mode transients before LDO regulation. Use Value: 275 V clamping voltage prevents overvoltage on 24 V nominal outputs, maintaining regulation integrity during 1 kV/0.5 J surges. |
Use Scenario: Shielding analog front-ends of pressure/temperature sensors from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA loop inputs to suppress ±8 kV contact ESD without distorting low-frequency sensor signals. Use Value: Junction capacitance <100 pF at zero bias ensures minimal signal attenuation below 10 kHz, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is required for final product certification. | Direct substitution where halogen-free bill-of-materials is mandated. |
| SMCJ170AHE3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 100 °C/W. | Higher thermal mass supports higher average surge repetition rates; requires larger PCB footprint. | Preferred for high-duty-cycle surge environments where SMB thermal limits may be exceeded. |
Compared with SMBJ170AHE3/52, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ170AHE3/52 delivers superior thermal handling at the cost of board space-making it suitable for applications with frequent surge exposure or limited heatsinking.
Availability
SMBJ170AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ170AHE3/52 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 is engineered for high-energy transient suppression in space-constrained SMT designs, targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and UL recognition.
FAQ
What is the maximum clamping voltage of SMBJ170AHE3/52 under standard test conditions?
The SMBJ170AHE3/52 has a maximum clamping voltage (VC) of 275 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 2.2 A. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ170AHE3/52 suitable for automotive applications?
Yes, SMBJ170AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via the HE3 suffix. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC standards. The SMBJ170AHE3/52 is deployed in body control modules, lighting drivers, and power distribution units where transient immunity and long-term reliability are critical.
What does the "HE3" suffix indicate in SMBJ170AHE3/52?
The "HE3" suffix in SMBJ170AHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3 parts and confirms compliance with automotive reliability standards, UL 497B recognition, and JESD201 Class 2 whisker resistance. The SMBJ170AHE3/52 is not interchangeable with non-HE3 variants in automotive designs without requalification.
How does SMBJ170AHE3/52 differ from bidirectional TVS diodes like SMBJ170CA?
The SMBJ170AHE3/52 is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBJ170CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SMBJ170AHE3/52 provides lower leakage (<1.0 µA at 170 V) and supports forward surge current (IFSM = 100 A), making it appropriate for DC rail protection. Bidirectional types are reserved for AC or floating signal lines.
What PCB pad layout is recommended for optimal thermal performance of SMBJ170AHE3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for SMBJ170AHE3/52 to achieve the published RθJA of 100 °C/W. Reducing pad size increases thermal resistance and reduces surge current handling. The SMBJ170AHE3/52 datasheet provides exact mounting dimensions and recommends solder mask defined pads to prevent bridging during reflow.
SMBJ170AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ170AHE3/52 FAQ
1.How can I place an order for SMBJ170AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHE3/52 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 SMBJ170AHE3/52 reliable?
The price and inventory of SMBJ170AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHE3/52?
SMBJ170AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHE3/52 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 SMBJ170AHE3/52?
For technical support, including SMBJ170AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHE3/52 requirements.
6.How does Aetrix verify that SMBJ170AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHE3/52 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 SMBJ170AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170AHE3/52?
All SMBJ170AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHE3/52, 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 SMBJ170AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ170AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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