My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ170C-E3/52
;;2.jpg)
- Part No.:
- SMBJ170C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170C-E3/52.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,050
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ170C-E3/52 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 power rails and signal lines. It features a 170 V standoff voltage (VWM), 189–209 V breakdown range (VBR at 1 mA), 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives to safeguard MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMBJ170C-E3/52 datasheet, SMBJ170C-E3/52 pinout, SMBJ170C-E3/52 application, or SMBJ170C-E3/52 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 170 V), but triggers avalanche conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤275 V at 2.2 A. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Designed for single-polarity DC rail protection, SMBJ170C-E3/52 uses cathode-band polarity marking and delivers sub-nanosecond response time. It is rated for operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets upper limit for protected circuit's steady-state rail. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system overvoltage tolerance. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge; must stay below protected device's absolute max rating. |
| PPPM | 600 W - Peak pulse power handling capability; defines survivability against standardized lightning/inductive transients. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on recommended 5.0 mm × 5.0 mm pad layout; critical for thermal derating above 25 °C. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports fault-current withstand in power-stage protection. |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient industrial environments with appropriate layout. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 170 V rail); conducts surge current to ground when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients common in industrial motor control and power supply outputs without failure. |
| Glass passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under repeated surge stress. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without preconditioning or special handling. |
| RoHS-compliant, matte tin plating | Guarantees solderability and intermetallic formation control per JESD 22-B102 and J-STD-002. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive downstream ICs. |
Applications
| Industrial Motor Drive Protection | DC Power Rail Clamp |
|---|---|
|
Use Scenario: Protecting gate driver ICs and bootstrap circuits in 3-phase IGBT inverters subjected to inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between high-side gate drive rail and ground, triggered within <1 ns upon overvoltage event. Use Value: Limits gate-source voltage to ≤275 V, preventing destructive breakdown of 600 V-class gate drivers while surviving 600 W surges. |
Use Scenario: Safeguarding 170 V DC bus in telecom rectifier modules against load-dump and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across bus input, conducting only during transient excursions beyond 170 V. Use Value: Maintains system uptime by absorbing 10/1000 µs transients up to 2.2 A without degradation, verified per IEC 61000-4-5. |
| Automotive HVAC Blower Control | Industrial PLC Analog Input Protection |
|
Use Scenario: Securing 12–24 V control signals driving brushed DC blower motors in automotive cabin systems. IC Role / Device Role / Timing Role: Unidirectional TVS on motor driver output line, referenced to chassis ground with cathode tied to signal line. Use Value: Withstands ISO 7637-2 Pulse 1/2a/5a transients and provides AEC-Q101-qualified reliability when ordered as HE3 variant. |
Use Scenario: Shielding 4–20 mA current-loop inputs in programmable logic controllers from field-wiring ESD and surge coupling. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 170 V) shunt element placed across input terminals to divert transients before front-end op-amps. Use Value: Prevents input stage latch-up or damage while maintaining signal integrity due to minimal capacitance (<100 pF at 0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ170A | Same VWM (170 V), slightly higher VC (285 V @ 2.1 A), identical SMB package and 600 W rating. | Higher clamping voltage reduces protection margin for 300 V-rated components; suitable where layout allows tighter VC tolerance. | Select SMAJ170A if sourcing diversification is required and clamping margin permits. |
| ON Semiconductor 1.5SMC170A | Same VWM/VBR specs, identical 600 W rating, but larger SMC (DO-214AB) package (4.5 mm × 3.9 mm vs. SMB's 4.6 mm × 3.9 mm). | Requires PCB footprint revision; offers marginally better thermal dissipation (RθJA ≈ 85 °C/W) but sacrifices board space efficiency. | Choose 1.5SMC170A only if thermal constraints exceed SMBJ170C-E3/52's 100 °C/W limit and layout allows SMC pad change. |
Compared with SMAJ170A and 1.5SMC170A, SMBJ170C-E3/52 delivers the lowest clamping voltage (275 V) in the smallest standard footprint, optimizing protection margin and board area - critical for space-constrained industrial and automotive modules.
Availability
SMBJ170C-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom rectifier modules, automotive HVAC controls, and PLC analog input protection requiring stable component supply, RoHS compliance, and AEC-Q101 qualification (via HE3 variant).
Supply support for SMBJ170C-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 automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and telecom infrastructure where robustness and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ170C-E3/52 and why does it matter?
The SMBJ170C-E3/52 has a maximum clamping voltage (VC) of 275 V at 2.2 A peak pulse current (10/1000 µs). This value defines the highest voltage that will appear across the protected circuit during a surge event. It matters because it must remain safely below the absolute maximum voltage rating of downstream components - for example, ensuring gate drivers rated for 300 V are not overstressed. The 275 V clamping level of SMBJ170C-E3/52 provides a 25 V design margin, directly supporting robust system-level surge immunity.
Is SMBJ170C-E3/52 suitable for automotive applications?
Yes - the base SMBJ170C-E3/52 is commercial-grade and RoHS-compliant, but Vishay offers the AEC-Q101-qualified variant SMBJ170C-HE3 (with "HE3" suffix) for automotive use. That version undergoes extended reliability testing including temperature cycling, humidity bias, and surge endurance per AEC-Q101. For HVAC blower control or body electronics where qualification is required, specify SMBJ170C-HE3 instead of SMBJ170C-E3/52.
How does the SMBJ170C-E3/52 differ from bidirectional versions like SMBJ170CA?
SMBJ170C-E3/52 is unidirectional, meaning it conducts only when the cathode is positive relative to the anode - ideal for DC rail protection with defined polarity. Bidirectional variants like SMBJ170CA suppress surges in both directions and lack polarity marking. SMBJ170C-E3/52 offers lower leakage (<1 µA at 170 V) and supports forward surge current (IFSM = 100 A), whereas SMBJ170CA does not specify forward surge rating and exhibits symmetric leakage in both polarities.
What PCB layout guidance applies to SMBJ170C-E3/52 for optimal thermal performance?
For optimal thermal performance, mount SMBJ170C-E3/52 on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Use internal or external copper planes connected via multiple thermal vias to enhance heat spreading. Avoid narrow traces between the device and ground/power planes - low-inductance, wide copper pours reduce dynamic impedance during surge events and keep RθJA near the rated 100 °C/W. This layout directly impacts sustained surge survivability and junction temperature rise.
Can SMBJ170C-E3/52 be used in parallel for higher power handling?
No - SMBJ170C-E3/52 is not recommended for parallel operation due to mismatch in VBR (189–209 V range) and dynamic impedance, which causes uneven current sharing during transients and risks thermal runaway in one device. For higher power needs, select a single higher-rated TVS (e.g., 1500 W discrete or module) or redesign the protection topology using staged clamping. Parallel use of SMBJ170C-E3/52 would compromise reliability and invalidate its 600 W rating.
SMBJ170C-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:
- -
- 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-E3/52 FAQ
1.How can I place an order for SMBJ170C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170C-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 SMBJ170C-E3/52 reliable?
The price and inventory of SMBJ170C-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 SMBJ170C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170C-E3/52?
SMBJ170C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170C-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 SMBJ170C-E3/52?
For technical support, including SMBJ170C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170C-E3/52 requirements.
6.How does Aetrix verify that SMBJ170C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170C-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 SMBJ170C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170C-E3/52?
All SMBJ170C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170C-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 SMBJ170C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ170C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170C-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
