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Vishay General Semiconductor - Diodes Division SMBJ170-E3/52
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- Part No.:
- SMBJ170-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170-E3/52.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
SMBJ170-E3/52 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, 600 W peak pulse power (10/1000 µs), and clamps to ≤275 V at 2.2 A peak surge current - protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the SMBJ170-E3/52 datasheet, SMBJ170-E3/52 pinout, SMBJ170-E3/52 application, or SMBJ170-E3/52 equivalent, key selection criteria include unidirectional polarity, 170 V reverse stand-off rating, 275 V maximum clamping voltage at rated IPPM, thermal resistance (RθJA = 100 °C/W), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping protection device in parallel with sensitive circuit nodes. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle. The device is rated for TJ = −55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Designed for unidirectional operation, SMBJ170-E3/52 uses cathode-band marking and exhibits 1.0 µA max reverse leakage at VWM. Its 5.0 W steady-state power dissipation (at TA = 50 °C on infinite heatsink) and 100 °C/W junction-to-ambient thermal resistance define PCB pad layout requirements - minimum 0.2" × 0.2" copper pads per terminal are specified for derated performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 189 V / 209 V at IT = 1 mA - ensures reliable breakdown onset within defined tolerance band |
| VC @ IPPM | ≤275 V at 2.2 A - clamping voltage limits stress on downstream components during surge events |
| PPPM | 600 W (10/1000 µs waveform) - defines transient energy absorption capability under standard test condition |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| RθJA | 100 °C/W - dictates required PCB copper area and thermal management for sustained operation |
| Polarity | Unidirectional - requires correct cathode orientation in series with protected line |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads; compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Current exit point during forward conduction; marked with band | Connected to higher-potential side (e.g., VBUS or signal line) - clamps when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating in standard layouts |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over temperature and lifetime cycling |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance without halogen restrictions or automotive qualification overhead |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive switching) |
Applications
| Industrial Power Supply Protection | Telecom DC Feeder Line Protection |
|---|---|
Use Scenario: Protecting 170 V DC input rails in programmable logic controller (PLC) power modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach upstream rectifiers and downstream DC/DC controllers. Use Value: Limits voltage excursion to ≤275 V during 600 W surges, preventing damage to 200 V-rated electrolytic capacitors and MOSFET gate oxides. |
Use Scenario: Safeguarding -48 V telecom central office feeder lines against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at line entry point to absorb common-mode energy while preserving signal integrity on differential pairs. Use Value: 1.0 µA leakage at 170 V VWM avoids loading of high-impedance monitoring circuits; 100 °C/W RθJA allows use on standard FR-4 without thermal vias. |
| Automotive Body Control Module (BCM) Input Protection | Sensor Signal Line Protection (Industrial) |
Use Scenario: Protecting 12 V–24 V auxiliary inputs in BCMs exposed to ISO 7637-2 pulse 5a/b transients. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary LC filters, sized for residual overshoot suppression. Use Value: 275 V clamping voltage provides margin below 300 V system-level insulation ratings; E3 suffix ensures compatibility with commercial-grade manufacturing flows. |
Use Scenario: Shielding analog outputs of pressure sensors in factory automation systems from EFT bursts on 4–20 mA loops. IC Role / Device Role / Timing Role: Low-leakage TVS placed across loop terminals to shunt fast transients without perturbing precision current sourcing. Use Value: ≤1.0 µA ID at VWM prevents offset error in 16-bit DAC output stages; SMB footprint enables dense placement near connector entry points. |
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-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No functional difference; selected where halogen-free materials are mandated in final assembly | Choose when compliance with JEDEC J-STD-20 or IPC-1752A halogen content thresholds is required |
| SMBJ170AHE3_B/I | AEC-Q101 qualified version with same VWM/VBR/VC but automotive-grade traceability and extended temperature validation | Required for automotive body electronics where component-level qualification per AEC-Q101 is mandatory | Specify only when automotive OEM or Tier-1 program mandates AEC-Q101; otherwise SMBJ170-E3/52 suffices for industrial/commercial use |
Compared with SMBJ170A-M3/52 and SMBJ170AHE3_B/I, SMBJ170-E3/52 offers identical clamping performance and thermal behavior at lower cost and broader availability for non-automotive applications - making it optimal for industrial power, telecom infrastructure, and consumer electronics where halogen-free or automotive qualification are not required.
Availability
SMBJ170-E3/52 is available at Aetrix Electronics and suitable for industrial power supply protection, telecom DC feeder line hardening, and sensor interface surge suppression requiring stable component supply, consistent RoHS compliance, and support for high-volume SMT assembly.
Supply support for SMBJ170-E3/52 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, TVS devices, and MOSFETs with emphasis on reliability, power efficiency, and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for industrial, telecom, and computing applications - balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ170-E3/52 under rated surge conditions?
The SMBJ170-E3/52 has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current (IPPM) of 2.2 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMBJ170-E3/52 suitable for bidirectional transient protection?
No, SMBJ170-E3/52 is a unidirectional TVS diode, as indicated by its "A" suffix and cathode-band marking. For bidirectional protection, Vishay offers the SMBJ170CA variant. Using SMBJ170-E3/52 in bidirectional applications would result in forward conduction during negative transients, potentially causing failure or unintended circuit behavior.
What does the "E3/52" suffix indicate in SMBJ170-E3/52?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/52" specifies packaging in 7-inch plastic tape-and-reel format with a base quantity of 750 units. This configuration supports standard pick-and-place equipment and aligns with IPC-7351B land patterns for SMB (DO-214AA) footprints.
How does SMBJ170-E3/52 handle repeated surge events?
SMBJ170-E3/52 is rated for repetitive 10/1000 µs surges at a 0.01% duty cycle - meaning it can sustain repeated pulses if average power remains within its 5.0 W steady-state dissipation limit at TA = 50 °C. Derating per Figure 2 of the datasheet is required above 25 °C ambient to maintain reliability across thermal cycles.
What is the thermal resistance from junction to ambient for SMBJ170-E3/52?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ170-E3/52 is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional thermal vias or heatsinking - design adjustments are needed if power dissipation exceeds 0.5 W in enclosed environments.
SMBJ170-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170-E3/52 FAQ
1.How can I place an order for SMBJ170-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170-E3/52 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 SMBJ170-E3/52 reliable?
The price and inventory of SMBJ170-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170-E3/52?
SMBJ170-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170-E3/52 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 SMBJ170-E3/52?
For technical support, including SMBJ170-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170-E3/52 requirements.
6.How does Aetrix verify that SMBJ170-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170-E3/52 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 SMBJ170-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170-E3/52?
All SMBJ170-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170-E3/52, 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 SMBJ170-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ170-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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