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Vishay General Semiconductor - Diodes Division SMBJ170C-E3/5B
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- Part No.:
- SMBJ170C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170C-E3/5B.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
SMBJ170C-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 capability with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ170C-E3/5B datasheet, SMBJ170C-E3/5B pinout, SMBJ170C-E3/5B application, or SMBJ170C-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and real-world implementation guidance for ESD and lightning-induced transient suppression.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs or MOSFETs. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design per Vishay's 5.0 mm × 5.0 mm recommendation.
The device is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge (IFSM), and exhibits a 0.108 %/°C temperature coefficient of VBR - enabling stable clamping across automotive and industrial ambient ranges without active biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 189 V / 209 V at 1 mA - guaranteed avalanche initiation range; determines minimum overvoltage level that triggers protection. |
| VC @ IPPM | 275 V at 2.2 A - maximum clamped voltage seen by protected circuit during 10/1000 µs surge; sets worst-case stress on downstream components. |
| PPPM | 600 W - peak transient power handling with 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - reverse leakage at rated stand-off voltage; ensures negligible standby power loss and no false triggering. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-temperature environments like motor control enclosures. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs required copper area for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential rail in unidirectional configuration; must be routed with low-inductance path for effective surge shunting. |
| Cathode | Current exit point during reverse avalanche | Connected to protected line (e.g., 170 V supply rail); polarity marking ensures correct orientation to avoid short-circuit failure. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 4 (4 kV line-earth). |
| 275 V clamping voltage at 2.2 A | Limits voltage overshoot to ≤1.6× VWM during surge, protecting 200 V-rated MOSFETs and gate drivers without additional series impedance. |
| MSL Level 1 (260 °C reflow) | Enables compatibility with standard lead-free SMT assembly processes without moisture-related popcorning or delamination. |
| 100 A IFSM (8.3 ms half-sine) | Supports single-event inrush or fault-current events in DC bus protection, such as motor stall or short-circuit recovery. |
| 0.108 %/°C VBR tempco | Ensures predictable clamping voltage shift across -40 °C to +125 °C ambient, critical for automotive under-hood applications. |
Applications
| Industrial Motor Drive DC Bus Protection | Telecom Power Supply Input Stage |
|---|---|
Use Scenario: Suppresses switching transients and regenerative energy spikes on 170 V DC bus in servo amplifier modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between bus rail and chassis ground, triggered within <1 ps of overvoltage onset. Use Value: Clamps transient excursions to ≤275 V, preventing gate oxide rupture in 200 V SiC MOSFETs and maintaining system uptime during load dump events. |
Use Scenario: Protects primary-side rectifier and controller ICs in 170 V telecom offline SMPS against lightning-induced surges on AC input. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted across bridge rectifier output, absorbing differential-mode surges before bulk capacitor. Use Value: Limits peak voltage to 275 V during 6 kV/0.5 J surges, avoiding overvoltage lockout and enabling compliance with GR-1089-CORE Section 4.5.2.2. |
| Automotive On-Board Charger (OBC) HV Interface | Industrial PLC Analog Input Protection |
Use Scenario: Shields isolated gate driver inputs and auxiliary power rails in 170 V OBC bidirectional converters from battery transients and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS connected between HV domain and isolation barrier, referenced to local ground plane. Use Value: Withstands 100 A surge pulses without degradation, meeting AEC-Q101 qualification requirements for automotive-grade reliability. |
Use Scenario: Guards 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS placed across input terminals, upstream of precision op-amp front-end. Use Value: Maintains signal integrity with sub-µA leakage at 170 V, eliminating offset drift while clamping 1 kV EFT bursts to safe levels. |
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-E3/5B | Identical electrical specs and package; differs only in suffix convention - "A" denotes unidirectional, "C" is legacy marking for same unidirectional variant per Vishay documentation. | No functional difference; both used interchangeably in production for 170 V rail protection. | Select SMBJ170C-E3/5B when matching legacy BOMs referencing "C" suffix; otherwise SMBJ170A-E3/5B is functionally identical and widely stocked. |
| SMCJ170A-E3/57T | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Better thermal performance and higher surge capacity; requires larger PCB footprint and different pad layout. | Choose SMCJ170A-E3/57T where >600 W surge margin or extended thermal cycling life is required; not drop-in due to package size mismatch. |
Compared with SMBJ170C-E3/5B, SMBJ170A-E3/5B offers identical protection performance in the same SMB footprint, while SMCJ170A-E3/57T trades compactness for higher surge endurance and improved thermal management - guiding selection based on space constraints versus surge margin requirements.
Availability
SMBJ170C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive on-board chargers, and PLC analog input protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMBJ170C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial, automotive, and telecom systems where robustness against lightning, EFT, and inductive switching surges is mission-critical.
FAQ
What is the clamping voltage of SMBJ170C-E3/5B at its rated peak pulse current?
The SMBJ170C-E3/5B has a maximum clamping voltage (VC) of 275 V at 2.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage imposed on the protected circuit during a full-rated surge event - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMBJ170C-E3/5B RoHS-compliant and halogen-free?
Yes, SMBJ170C-E3/5B carries the "E3" suffix, indicating it is RoHS-compliant and qualified to commercial grade standards per Vishay's ordering nomenclature. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., SMBJ170C-M3/5B) must be selected instead.
Does SMBJ170C-E3/5B meet AEC-Q101 automotive qualification?
No, SMBJ170C-E3/5B is not AEC-Q101 qualified. The automotive-grade version uses the "HE3" or "HM3" suffix (e.g., SMBJ170CHE3_B/I). SMBJ170C-E3/5B is rated for commercial temperature range (-55 °C to +150 °C) but lacks the extended reliability testing required for automotive applications.
What is the thermal resistance and recommended PCB layout for SMBJ170C-E3/5B?
SMBJ170C-E3/5B 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, as specified in Vishay's datasheet. Deviation from this pad size increases thermal impedance and reduces safe surge repetition rate - especially important in repetitive surge scenarios like motor commutation noise.
How does SMBJ170C-E3/5B differ from SMBJ170CA-E3/5B?
SMBJ170C-E3/5B is unidirectional, with polarity marked by a cathode band and intended for DC rail protection. SMBJ170CA-E3/5B is bidirectional - lacking polarity marking - and provides symmetrical clamping for AC-coupled or floating signal lines. Their VBR, VC, and PPPM values are identical, but circuit placement and grounding strategy differ fundamentally.
SMBJ170C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ170C-E3/5B FAQ
1.How can I place an order for SMBJ170C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170C-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 SMBJ170C-E3/5B reliable?
The price and inventory of SMBJ170C-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 SMBJ170C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170C-E3/5B?
SMBJ170C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170C-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 SMBJ170C-E3/5B?
For technical support, including SMBJ170C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170C-E3/5B requirements.
6.How does Aetrix verify that SMBJ170C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170C-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 SMBJ170C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170C-E3/5B?
All SMBJ170C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170C-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 SMBJ170C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ170C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170C-E3/5B Tags
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