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Vishay General Semiconductor - Diodes Division SMBJ170CAHE3/52
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- Part No.:
- SMBJ170CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHE3/52.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
SMBJ170CAHE3/52 from Vishay General Semiconductor is a bidirectional 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, 600 W peak pulse power (10/1000 µs), clamping voltage of 275 V at 2.2 A, and operates across -55 °C to +150 °C junction temperature range - deployed in industrial sensor signal lines and automotive power supply rails.
For engineers reviewing the SMBJ170CAHE3/52 datasheet, SMBJ170CAHE3/52 pinout, SMBJ170CAHE3/52 application, or SMBJ170CAHE3/52 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance under surge conditions, thermal resistance data (RθJA = 100 °C/W), and bidirectional TVS selection guidance for ESD and lightning-induced transients.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and low incremental surge resistance, enabling effective suppression of fast-rising transients such as ESD (IEC 61000-4-2) and inductive switching spikes. Its symmetrical I-V characteristic ensures identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints.
The device is rated for 600 W peak pulse power with 10/1000 µs waveform at 0.01% duty cycle, derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge events when thermally managed on ≥5.0 mm × 5.0 mm copper pads per terminal. It meets MSL Level 1 per J-STD-020 and is AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit of normal circuit operation. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Breakdown threshold range where device transitions from high-impedance to low-impedance clamping state. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 600 W - Peak transient energy absorption capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IDR @ VWM | 1.0 µA max - Reverse leakage current at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits. |
| TJ Range | -55 °C to +150 °C - Extended junction temperature range enables deployment in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard PCB pad; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals simplify PCB layout and eliminate cathode/anode orientation concerns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; voltage clamping occurs regardless of polarity - ideal for AC-coupled or floating signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against IEC 61000-4-5 surge events up to Level 3 without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Confirms reliability for automotive applications including engine control units and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without moisture sensitivity handling or baking requirements. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
Applications
| Industrial Sensor Interfaces | Automotive Power Supply Rails |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors and CAN/LIN bus transceivers from load dump and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal/power lines to shunt transient energy before it reaches precision ADCs or isolated interface ICs. Use Value: Maintains signal integrity during 100 V/µs transients by limiting voltage excursion to ≤275 V, preventing sensor output saturation or communication dropout. |
Use Scenario: Safeguarding 12 V battery-fed ECUs (e.g., lighting controllers, HVAC modules) against ISO 7637-2 Pulse 5a (load dump) events up to 60 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp parallel to input filter capacitor, activated within picoseconds to divert surge current away from LDO regulators and microcontrollers. Use Value: Withstands 2.2 A peak surge at 275 V clamping, enabling compliance with automotive load-dump immunity requirements without upstream fuse coordination. |
| Telecom Line Protection | Consumer Power Adapters |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on RJ45 ports in outdoor access points and base stations. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) front-end, providing fast-response clamping for residual transients below 1 kV. Use Value: Low 1.0 µA leakage at 170 V VWM prevents DC bias shift in transformer-coupled data lines while clamping sub-microsecond EFT bursts. |
Use Scenario: Overvoltage protection on secondary-side DC outputs of USB-C PD adapters and wireless charging transmitters. IC Role / Device Role / Timing Role: Final-stage clamp on regulated 9–20 V output rails to absorb coupling noise from primary-side switching and external ESD events. Use Value: 170 V VWM allows safe operation across full USB PD 3.1 variable output range while delivering 600 W surge margin for accidental 240 VAC cross-conduction faults. |
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 electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct drop-in replacement where halogen-free bill-of-materials is required. |
| SMCJ170CAHE3/52 | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher surge capacity suits applications with repeated high-energy transients (e.g., motor drives), but requires larger PCB footprint. | Choose when system-level surge testing exceeds 600 W or when extended thermal mass improves long-term reliability under cyclic stress. |
Compared with SMBJ170CAHE3/52, the M3/52 variant offers identical protection performance with halogen-free construction, while the SMCJ170CAHE3/52 provides 2.5× higher surge power handling in a physically larger package - enabling design flexibility between space-constrained layouts and high-reliability surge environments.
Availability
SMBJ170CAHE3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive power supply rails, telecom line protection, and consumer power adapter designs requiring stable component supply, AEC-Q101 qualification, and consistent TVS performance across production batches.
Supply support for SMBJ170CAHE3/52 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-speed transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMBJ170CAHE3/52 at its rated peak pulse current?
The SMBJ170CAHE3/52 has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 2.2 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value is critical for determining the maximum overvoltage stress imposed on downstream components during transient events, and it is guaranteed across the full operating temperature range per the Vishay datasheet revision 09-Jan-2024.
Is SMBJ170CAHE3/52 suitable for automotive applications?
Yes, SMBJ170CAHE3/52 is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and documented in Vishay's official datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock - validating its use in automotive powertrain, chassis, and body electronics where reliability under harsh thermal and vibration conditions is mandatory.
How does the bidirectional configuration of SMBJ170CAHE3/52 affect PCB layout?
The SMBJ170CAHE3/52 has no polarity marking and exhibits symmetrical electrical behavior in both directions, meaning either terminal can serve as anode or cathode. This eliminates orientation constraints during placement, simplifies automated assembly, and avoids layout errors common with unidirectional TVS diodes - especially beneficial in differential or AC-coupled signal paths like RS-485, CAN, or Ethernet interfaces.
What is the maximum reverse leakage current for SMBJ170CAHE3/52 at its stand-off voltage?
The SMBJ170CAHE3/52 specifies a maximum reverse leakage current (IDR) of 1.0 µA at its 170 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensing circuits and minimizes standby power loss in battery-powered systems - a key advantage over higher-leakage alternatives in precision analog or low-power IoT applications.
Can SMBJ170CAHE3/52 be used in place of a unidirectional TVS diode?
No - SMBJ170CAHE3/52 is strictly bidirectional and lacks polarity-dependent forward conduction. It cannot replace a unidirectional TVS (e.g., SMBJ170AHE3/52) in DC-biased circuits where forward voltage drop or rectification behavior is required. Substitution would compromise protection in single-polarity applications and may cause unintended conduction during normal operation; always match device polarity to circuit topology.
SMBJ170CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170CAHE3/52 FAQ
1.How can I place an order for SMBJ170CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHE3/52 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 SMBJ170CAHE3/52 reliable?
The price and inventory of SMBJ170CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHE3/52?
SMBJ170CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHE3/52 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 SMBJ170CAHE3/52?
For technical support, including SMBJ170CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ170CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHE3/52 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 SMBJ170CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHE3/52?
All SMBJ170CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHE3/52, 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 SMBJ170CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ170CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHE3/52 Tags
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