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Vishay General Semiconductor - Diodes Division SMBJ170CAHE3/5B
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- Part No.:
- SMBJ170CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHE3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,768
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Product details
Overview
SMBJ170CAHE3/5B from Vishay General Semiconductor is a bidirectional 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), 209–231 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 µs), 2.2 A maximum reverse leakage at VWM, and 275 V clamping voltage at 2.2 A peak pulse current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ170CAHE3/5B datasheet, SMBJ170CAHE3/5B pinout, SMBJ170CAHE3/5B application, or SMBJ170CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 150 °C max junction temperature, UL 497B recognition, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, leveraging an avalanche breakdown mechanism to divert transient energy away from downstream ICs. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity sensitivity in AC-coupled or floating signal paths.
The SMBJ170CAHE3/5B uses a glass-passivated silicon junction and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow tolerance. Its thermal resistance (RθJA = 100 °C/W) and low incremental surge resistance support reliable operation under repetitive 0.01% duty-cycle transients when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 209 V / 231 V at 1 mA - Confirmed breakdown threshold range ensuring robust margin above VWM |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 600 W - Peak pulse power handling per single transient event, validated per Fig. 1 curve |
| ID @ VWM | 2.2 µA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Enables use in high-temperature industrial and automotive under-hood environments |
| Package | SMB (DO-214AA) - Standardized 2-pin SMT footprint compatible with JEDEC MS-012AC outline |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current regardless of polarity; connects to line under protection |
| Cathode | Transient current exit (bidirectional) | Completes surge path to ground or return; symmetric with anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals or floating buses without polarity constraints |
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, TCT, and ESD |
| UL 497B recognized | Meets Underwriters Laboratories safety standard for telecom/data line protectors (File E136766) |
| 600 W 10/1000 µs rating | Handles high-energy transients common in industrial motor drives and relay switching |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without preconditioning or baking |
Applications
| Industrial Sensor Interface | Telecom Data Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to inductive kickback in factory automation cabinets. IC Role / Device Role / Timing Role: Voltage clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤275 V, preventing ADC saturation and latch-up while maintaining <2.2 µA leakage at 170 V DC bias. | Use Scenario: Safeguarding RS-485 transceiver I/O pins against lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp on differential bus lines, referenced to local ground. Use Value: Clamps ±275 V transients within nanoseconds, preserving signal integrity across 10 Mbps data rates without adding capacitance-sensitive loading. |
| Automotive Body Control Module | Power Supply Input Stage |
Use Scenario: Suppressing load-dump spikes on 12 V supply rails feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary TVS on main power input, upstream of DC/DC converter and LDOs. Use Value: Withstands 600 W pulses and operates up to +150 °C ambient, meeting ISO 7637-2 Pulse 5a requirements when paired with appropriate fuse coordination. | Use Scenario: Guarding AC-DC adapter secondary-side outputs against cross-regulation surges and ESD events. IC Role / Device Role / Timing Role: Final-stage transient suppressor on regulated 5 V/12 V/24 V outputs before connector interface. Use Value: Provides 275 V clamping with <2.2 µA leakage, avoiding regulation drift while enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV) |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated | Choose SMBJ170CA-M3/5B when halogen-free bill-of-materials is required by OEM specification |
| SMCJ170CAHE3/5B | Same VWM/VBR/VC, but SMC (DO-214AB) package - 20 % larger footprint, 1500 W PPPM | Higher power handling supports more severe surge environments (e.g., outdoor power systems) | Choose SMCJ170CAHE3/5B only if board space allows and 1500 W surge rating is needed beyond 600 W |
Compared with SMBJ170CAHE3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ variant trades compactness for higher surge capacity - making SMBJ170CAHE3/5B optimal for space-constrained, AEC-Q101-compliant designs needing 600 W clamping.
Availability
SMBJ170CAHE3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom data line protection, and automotive body control modules requiring stable component supply and long-term lifecycle continuity.
Supply support for SMBJ170CAHE3/5B 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMBJ series targets high-reliability transient suppression in harsh environments, with design focus on fast response, low clamping ratio, and robust SMT manufacturability for industrial and automotive end equipment.
FAQ
What is the clamping voltage of SMBJ170CAHE3/5B at its rated peak pulse current?
The SMBJ170CAHE3/5B has a maximum clamping voltage (VC) of 275 V at its specified peak pulse current (IPPM) of 2.2 A, measured using the standardized 10/1000 µs waveform. This value is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ170CAHE3/5B suitable for automotive applications?
Yes, SMBJ170CAHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix per Vishay's ordering nomenclature and confirmed in the Mechanical Data section (page 2, note 1). It undergoes stress testing for high-temperature operating life, temperature cycling, and ESD immunity required for automotive electronics. The SMBJ170CAHE3/5B is commonly used in body control modules, infotainment power rails, and sensor interfaces where transient immunity and reliability are critical.
How does the bidirectional configuration of SMBJ170CAHE3/5B affect its circuit implementation?
The bidirectional configuration of SMBJ170CAHE3/5B means it functions identically for positive and negative transients, with no cathode band marking and symmetrical VBR characteristics in both directions. This eliminates polarity concerns during placement and enables direct use on AC-coupled lines, differential buses like RS-485, or floating grounds. Unlike unidirectional variants, the SMBJ170CAHE3/5B does not conduct forward current - its conduction is strictly avalanche-based in either polarity above VBR.
What is the maximum operating temperature for SMBJ170CAHE3/5B?
The SMBJ170CAHE3/5B has a maximum junction temperature (TJ) of +150 °C, as specified in the Maximum Ratings table (page 1). This rating enables reliable operation in under-hood automotive environments and high-ambient industrial enclosures. Derating curves in Figure 2 show that its peak pulse power must be reduced linearly above 25 °C ambient, reaching ~400 W at +100 °C case temperature - a key consideration when designing thermal relief into PCB layouts for the SMBJ170CAHE3/5B.
Does SMBJ170CAHE3/5B meet any safety certifications?
Yes, SMBJ170CAHE3/5B carries Underwriters Laboratories (UL) recognition under standard UL 497B for protectors, with file number E136766, covering both unidirectional and bidirectional configurations. This certification validates its suitability for telecom and data line protection applications requiring third-party safety compliance. The device also meets MSL Level 1 per J-STD-020 and is RoHS-compliant, as confirmed by the "HE3" suffix and documentation in Vishay document 88392.
SMBJ170CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMBJ170CAHE3/5B FAQ
1.How can I place an order for SMBJ170CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHE3/5B 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 SMBJ170CAHE3/5B reliable?
The price and inventory of SMBJ170CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHE3/5B?
SMBJ170CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHE3/5B 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 SMBJ170CAHE3/5B?
For technical support, including SMBJ170CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ170CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHE3/5B 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 SMBJ170CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHE3/5B?
All SMBJ170CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHE3/5B, 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 SMBJ170CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ170CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHE3/5B Tags
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