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Vishay General Semiconductor - Diodes Division SMBJ170-E3/5B
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- Part No.:
- SMBJ170-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170-E3/5B.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,481
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Product details
Overview
SMBJ170-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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMBJ170-E3/5B datasheet, SMBJ170-E3/5B pinout, SMBJ170-E3/5B application, or SMBJ170-E3/5B equivalent, key selection criteria include clamping voltage margin vs. protected device's absolute maximum rating, thermal derating above 25 °C, unidirectional polarity alignment with DC bias, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device that remains high-impedance below VWM (170 V) and rapidly avalanches into low-impedance conduction when transient voltage exceeds VBR (min. 189 V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
The device delivers 600 W peak pulse power handling per 10/1000 µs waveform with 20 °C/W junction-to-lead thermal resistance, enabling effective energy absorption without thermal runaway when mounted per recommended pad layout. It meets MSL level 1 per J-STD-020 and is RoHS-compliant (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage with margin. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge; must stay below protected device's absolute maximum rating. |
| PPPM | 600 W - Peak transient energy absorption capability; defines survivability against standardized lightning/surge events. |
| ID @ VWM | <1.0 µA - Reverse leakage current at stand-off voltage; negligible power loss and no interference in high-impedance sensing paths. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in enclosed industrial enclosures with limited airflow. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when soldered to PCB copper pads. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts surge current toward ground when transient exceeds VBR. |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving clamping precision. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-related popcorning or delamination. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without halogen content restrictions or automotive qualification overhead. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Power Rails |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on +24 V rail before they reach DC-DC converter ICs. Use Value: Limits clamped voltage to 275 V, well below 40 V absolute max rating of upstream buck controller, preventing latch-up or gate oxide damage. |
Use Scenario: 12 V battery-fed power distribution network in BCM subjected to ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V). IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing negative transients on switched 12 V outputs driving solenoids and relays. Use Value: With 170 V VWM, it remains non-conductive during normal operation while clamping negative spikes to safe levels for MCU I/O and driver ICs. |
| Telecom Line Card Surge Protection | Motor Drive Gate Driver Power Supply |
|
Use Scenario: Primary-side protection on AC/DC adapter input feeding telecom line card with Ethernet PHY and PoE controller. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges coupled onto AC mains entering telecom infrastructure. Use Value: 600 W PPPM rating sustains multiple 10/1000 µs surges per IEC 61000-4-5, maintaining integrity across field-deployed units with >10-year service life. |
Use Scenario: +15 V isolated auxiliary supply for IGBT gate drivers in variable-frequency drives experiencing shoot-through transients. IC Role / Device Role / Timing Role: Clamps voltage overshoot on gate driver VCC rail caused by transformer leakage inductance ringing. Use Value: Fast response time and 275 V VC prevent overvoltage damage to gate driver ICs rated for 20 V absolute max, preserving switching reliability. |
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; identical electrical specs and SMB package. | No functional difference; selected where halogen-free material compliance is mandated by OEM sustainability policy. | Choose SMBJ170A-M3/5B when halogen-free bill-of-materials is required; otherwise SMBJ170-E3/5B is standard. |
| SMCJ170A-E3/57T | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W vs. 100 °C/W), lower IPPM (3.5 A vs. 2.2 A). | Better thermal mass for repetitive surges; requires larger PCB footprint and different pad layout. | Choose SMCJ170A-E3/57T only if higher surge repetition rate or longer pulse duration (>1000 µs) is expected; SMBJ170-E3/5B is optimal for space-constrained 10/1000 µs protection. |
Compared with SMBJ170A-M3/5B, SMBJ170-E3/5B offers identical protection performance with standard RoHS compliance; versus SMCJ170A-E3/57T, it trades off thermal mass for 40 % smaller footprint and tighter layout integration in compact power modules.
Availability
SMBJ170-E3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and motor drive gate driver protection requiring stable component supply and full traceability.
Supply support for SMBJ170-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in space-constrained surface-mount applications across industrial, automotive, and telecom systems, balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ170-E3/5B under standard test conditions?
The SMBJ170-E3/5B 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 components see no more than 275 V during surge events, provided the SMBJ170-E3/5B is correctly mounted on 0.2" × 0.2" copper pads.
Is SMBJ170-E3/5B suitable for bidirectional transient protection?
No, SMBJ170-E3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay offers the SMBJ170CA variant. Using SMBJ170-E3/5B on AC-coupled or floating lines risks forward conduction during negative half-cycles, potentially damaging the SMBJ170-E3/5B or disrupting circuit operation.
What does the "E3/5B" suffix indicate in SMBJ170-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5B" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This format supports high-speed pick-and-place assembly and complies with J-STD-002 solderability requirements, confirming the SMBJ170-E3/5B is ready for automated SMT production.
How does SMBJ170-E3/5B perform at elevated ambient temperatures?
SMBJ170-E3/5B exhibits derated peak pulse power above 25 °C, following the curve in Figure 2 of its datasheet: at 75 °C ambient, its PPPM drops to ~420 W (70 % of rated 600 W). Its 150 °C maximum junction temperature allows sustained operation in sealed enclosures, but thermal design must account for RθJA = 100 °C/W and mounting pad size to avoid exceeding TJ max.
Can SMBJ170-E3/5B replace SMBJ150A in an existing design?
No-SMBJ170-E3/5B has a higher 170 V stand-off voltage versus SMBJ150A's 150 V, meaning it will not clamp transients below 170 V. Substituting it risks allowing damaging overvoltages to reach protected ICs rated for ≤160 V. Always verify VWM alignment with system operating voltage and safety margins before interchanging SMBJ170-E3/5B with other members of the SMBJ family.
SMBJ170-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBJ170-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170-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 SMBJ170-E3/5B reliable?
The price and inventory of SMBJ170-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 SMBJ170-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170-E3/5B?
SMBJ170-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170-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 SMBJ170-E3/5B?
For technical support, including SMBJ170-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170-E3/5B requirements.
6.How does Aetrix verify that SMBJ170-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170-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 SMBJ170-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170-E3/5B?
All SMBJ170-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170-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 SMBJ170-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ170-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170-E3/5B Tags
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