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Vishay General Semiconductor - Diodes Division SMBJ170CA-E3/52
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- Part No.:
- SMBJ170CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CA-E3/52.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,310
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Product details
Overview
SMBJ170CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 170 V standoff voltage (VWM), 189–209 V breakdown range (VBR at 1 mA), and clamps transients to ≤275 V at 2.2 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ170CA-E3/52 datasheet, SMBJ170CA-E3/52 pinout, SMBJ170CA-E3/52 application, or SMBJ170CA-E3/52 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, RoHS-compliant commercial-grade packaging, and direct alternatives with documented VWM/VC/IPPM alignment.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding VWM, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns.
Rated for 600 W peak pulse power (10/1000 µs), it sustains repetitive surges at 0.01% duty cycle and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Junction temperature range spans −55 °C to +150 °C, and thermal resistance is 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 189–209 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on across temperature and unit variation |
| VC (Clamping Voltage) | ≤275 V at IPPM = 2.2 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; determines stress on downstream ICs |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 µs transient; validates suitability for IEC 61000-4-5 Level 4 surges |
| IPPM (Peak Pulse Current) | 2.2 A - maximum non-repetitive surge current it can safely clamp; used with PCB trace impedance to estimate let-through energy |
| TJmax | +150 °C - maximum junction temperature; sets thermal design limits for ambient + power dissipation in continuous operation |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on recommended pad layout; required for calculating safe power derating above 25 °C |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions beyond −VBR; symmetric with cathode for full AC protection |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions beyond +VBR; identical clamping performance as anode terminal |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded lines without external polarity management |
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements up to Level 4 (4 kV line-to-line) |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection fidelity for high-speed interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; supports high-yield automated SMT assembly |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU; suitable for consumer, industrial, and telecom equipment with no halogen restrictions |
Applications
| Industrial Motor Drive Control | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensors from inductive kickback during MOSFET/IGBT switching in variable-frequency drives. IC Role / Device Role / Timing Role: Shunt TVS placed across DC bus or gate-source terminals to clamp voltage spikes before they exceed MOSFET VDSS or op-amp input ratings. Use Value: Limits transient voltage to ≤275 V, preventing cumulative gate oxide degradation and ensuring >10-year field reliability under 100,000+ switching cycles. |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against lightning-induced surges on outdoor telecom wiring. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential pair (A/B lines) and common-mode path to absorb common- and differential-mode transients. Use Value: Maintains signal integrity by clamping within 1 ns while surviving repeated 600 W surges - critical for maintaining link uptime in remote base stations. |
| Automotive Body Control Module (BCM) | Consumer Appliance Power Supply Input |
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V supply rails feeding microcontrollers and CAN transceivers in BCMs. IC Role / Device Role / Timing Role: Primary front-end TVS on main power input, coordinated with upstream fuse and downstream LC filtering to meet ISO 7637-2 Pulse 5a/b requirements. Use Value: Clamps 12 V rail to <275 V during 35 V/100 ms load dump, preventing brownout resets and latch-up in 3.3 V logic domains. |
Use Scenario: Protecting AC-DC adapter primary-side rectifiers and secondary-side DC outputs from ESD and mains-borne surges in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Secondary-side TVS on 24 V control rail to prevent latch-up in relay drivers and sensor ADCs during user-accessible port contact events. Use Value: Withstands >20 kV HBM ESD per IEC 61000-4-2 and maintains <1 µA leakage at 170 V - eliminating standby power drift in always-on modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA-M3/52 | Halogen-free, RoHS-compliant variant; identical VWM, VBR, VC, and PPPM specs; same SMB package and MSL rating | Required where halogen-free material declaration is mandated (e.g., EU public infrastructure tenders) | Select when compliance documentation must explicitly state "halogen-free" per IEC 61249-2-21 |
| SMCJ170CA-E3/52 | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; rated for 1500 W PPPM and 12.3 A IPPM (10/1000 µs) | Used where higher surge energy handling is needed (e.g., outdoor power distribution nodes), accepting larger board area | Choose only if system-level testing confirms ≥1500 W surge exposure; otherwise SMBJ170CA-E3/52 offers optimal size/power density |
Compared with SMBJ170CA-M3/52, the E3 suffix provides standard RoHS compliance without halogen reporting overhead; versus SMCJ170CA-E3/52, SMBJ170CA-E3/52 delivers identical clamping performance in 40% less PCB area - making it preferred for space-constrained industrial and telecom modules.
Availability
SMBJ170CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive body control modules, and consumer appliance power supplies requiring stable component supply and long-term obsolescence management.
Supply support for SMBJ170CA-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMBJ series targets surface-mount transient suppression in cost-sensitive, high-volume applications - balancing 600 W surge capability, compact SMB footprint, and commercial-grade manufacturability for industrial and telecom end equipment.
FAQ
What is the clamping voltage of SMBJ170CA-E3/52 at its rated peak pulse current?
The SMBJ170CA-E3/52 clamps to a maximum of 275 V when subjected to its specified peak pulse current of 2.2 A under the 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170CA-E3/52 maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is SMBJ170CA-E3/52 suitable for automotive applications?
The SMBJ170CA-E3/52 is a commercial-grade part (E3 suffix) and not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ170CAHE3_B/H variant, which carries the HE3 suffix and full AEC-Q101 qualification. The SMBJ170CA-E3/52 may be used in non-safety-critical automotive subsystems only after thorough system-level validation - but SMBJ170CA-E3/52 itself does not carry automotive qualification documentation or extended temperature screening.
How does the bidirectional design of SMBJ170CA-E3/52 affect its circuit placement?
The SMBJ170CA-E3/52 has no polarity marking and conducts identically in both directions, allowing placement across any two nodes subject to bidirectional overvoltage risk - such as differential data lines (RS-485, CAN), AC power inputs, or floating sensor bridges. Unlike unidirectional TVS diodes, SMBJ170CA-E3/52 eliminates orientation errors during automated placement and avoids the need for dual-device solutions on symmetric paths.
What is the thermal resistance of SMBJ170CA-E3/52, and how does it impact power derating?
The SMBJ170CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly governs power derating: at 75 °C ambient, its 5.0 W steady-state power dissipation drops to ~2.5 W. Engineers must apply Figure 2 from Vishay document 88392 to adjust IPPM ratings for elevated board temperatures - critical for enclosed industrial enclosures.
Does SMBJ170CA-E3/52 meet UL recognition standards?
Yes, the SMBJ170CA-E3/52 is Underwriters Laboratories (UL) recognized under file number E136766 for both unidirectional and bidirectional transient protectors per UL 497B. This certification covers safety compliance for use in telecommunications and industrial equipment. The UL mark applies to the entire SMBJ5.0A–SMBJ188A family, including SMBJ170CA-E3/52, and is valid for both commercial (E3/M3) and automotive (HE3/HM3) variants.
SMBJ170CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170CA-E3/52 FAQ
1.How can I place an order for SMBJ170CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CA-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 SMBJ170CA-E3/52 reliable?
The price and inventory of SMBJ170CA-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 SMBJ170CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CA-E3/52?
SMBJ170CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CA-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 SMBJ170CA-E3/52?
For technical support, including SMBJ170CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ170CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170CA-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 SMBJ170CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170CA-E3/52?
All SMBJ170CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CA-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 SMBJ170CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ170CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CA-E3/52 Tags
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