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Vishay General Semiconductor - Diodes Division SMBJ170HE3/52
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- Part No.:
- SMBJ170HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170HE3/52.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,700
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Product details
Overview
SMBJ170HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ170HE3/52 datasheet, SMBJ170HE3/52 pinout, SMBJ170HE3/52 application, or SMBJ170HE3/52 equivalent, this device is selected for robust overvoltage protection in automotive-grade power rails, industrial sensor interfaces, and telecom line-level circuits where AEC-Q101 qualification, low clamping ratio, and fast response time are critical.
Technical Context
The SMBJ170HE3/52 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables consistent clamping performance under repetitive transient stress.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it delivers thermal resistance of 100 °C/W (junction-to-ambient) and supports operating junction temperatures from –55 °C to +150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 12 V–48 V DC systems with high-voltage transients. |
| VBR min/max | 189 V / 209 V at 1 mA - Confirmed breakdown range ensures predictable turn-on behavior across temperature and unit variation. |
| VC @ IPPM | 275 V at 2.2 A - Clamping voltage during 10/1000 µs surge; limits downstream voltage stress to <275 V under rated 600 W pulse. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity marked by cathode band on one end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to system ground or low-side return path; establishes reference for clamping action during positive transients on cathode side. |
| Cathode | Transient voltage input / clamping node | Connected to protected line (e.g., power rail or signal); conducts avalanche current to anode when voltage exceeds VBR, limiting VC to ≤275 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, and ESD. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 10/1000 µs surge waveforms up to 4 kV open-circuit voltage without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping-critical for protecting MOSFET gates and IC inputs rated ≤300 V. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, with <0.1 %/°C drift coefficient and no parameter shift after 1000 surge cycles. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs and ADAS modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp negative-going spikes and suppress positive surges above 170 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤275 V, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Connected across signal and return lines to absorb fast-rising transients before they reach precision op-amps or ADC front-ends. Use Value: Maintains signal fidelity with <1.0 µA leakage at 170 V, avoiding offset errors in µA-level current sensing paths. |
| Telecom Line-Level Surge Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding Ethernet PHY power supplies and PoE injectors against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Mounted on primary-side DC bus to clamp common-mode transients before isolation barriers or DC-DC stages. Use Value: Delivers 600 W pulse handling with 275 V clamping-enabling compliance with ITU-T K.21 Basic Protection Level. |
Use Scenario: Protecting high-side and low-side gate drivers in BLDC inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Placed across gate-source terminals of SiC MOSFETs to clamp dv/dt-induced overshoot exceeding 170 V. Use Value: Fast avalanche response (<1 ns) prevents false turn-on and gate oxide stress during high-frequency PWM operation. |
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-E3/52 | Same VWM (170 V), VBR (189–209 V), and VC (275 V), but lacks AEC-Q101 qualification and RoHS-compliant HE3 marking. | Approved for commercial/industrial use only; not validated for automotive temperature cycling or humidity testing. | Select SMBJ170A-E3/52 only if AEC-Q101 is not required and cost optimization is prioritized. |
| SMCJ170AHE3/A | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields lower RθJA (50 °C/W vs. 100 °C/W). | Better suited for high-duty-cycle surge environments (e.g., frequent motor starts) where sustained power dissipation matters. | Choose SMCJ170AHE3/A when board space allows and thermal derating margin must exceed 2× that of SMBJ170HE3/52. |
Compared with SMBJ170A-E3/52, SMBJ170HE3/52 adds automotive qualification without sacrificing clamping performance; versus SMCJ170AHE3/A, it trades thermal headroom for compact SMB footprint-ideal for space-constrained automotive modules.
Availability
SMBJ170HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ170HE3/52 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, ruggedness, and application-specific validation.
The SMBJ series was developed for high-reliability transient suppression in harsh environments-including automotive, industrial, and telecom-where precise clamping, AEC-Q101 compliance, and surface-mount manufacturability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ170HE3/52 under rated surge conditions?
The SMBJ170HE3/52 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 per JEDEC standards and guarantees that downstream circuitry will not experience voltages exceeding 275 V during transient events within the device's specified power rating.
Is SMBJ170HE3/52 suitable for automotive applications?
Yes, SMBJ170HE3/52 is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliance and automotive-grade validation. It meets stress tests including high-temperature operating life, temperature cycling, and ESD robustness-making it appropriate for engine control, body electronics, and ADAS subsystems where reliability under thermal and electrical stress is essential.
How does the SMBJ170HE3/52 differ from the SMBJ170A-E3/52?
The SMBJ170HE3/52 differs from SMBJ170A-E3/52 primarily in qualification and marking: SMBJ170HE3/52 is AEC-Q101 qualified and RoHS-compliant with HE3 suffix, whereas SMBJ170A-E3/52 is commercial-grade only (E3 suffix). Electrical parameters-including VWM, VBR, VC, and PPPM-are identical between both versions.
What is the reverse leakage current specification for SMBJ170HE3/52 at its stand-off voltage?
The SMBJ170HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its 170 V stand-off voltage (VWM) and tested at 25 °C. This low leakage preserves signal integrity in high-impedance monitoring circuits and minimizes standby power loss in always-on automotive modules.
Can SMBJ170HE3/52 be used in bidirectional protection configurations?
No, SMBJ170HE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ170CA variant. Using SMBJ170HE3/52 in reverse-biased configurations risks permanent damage due to forward conduction beyond its 3.5 V VF limit at high currents.
SMBJ170HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 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)
SMBJ170HE3/52 FAQ
1.How can I place an order for SMBJ170HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170HE3/52 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 SMBJ170HE3/52 reliable?
The price and inventory of SMBJ170HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170HE3/52?
SMBJ170HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170HE3/52 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 SMBJ170HE3/52?
For technical support, including SMBJ170HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170HE3/52 requirements.
6.How does Aetrix verify that SMBJ170HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170HE3/52 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 SMBJ170HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170HE3/52?
All SMBJ170HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170HE3/52, 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 SMBJ170HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ170HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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