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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3/I
- Part No.:
- SMBJ170CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,582
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Product details
Overview
SMBJ170CAHM3/I 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), 189–209 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤275 V at 2.2 A peak surge current - deployed in industrial sensor interfaces and DC power rail protection.
For engineers reviewing the SMBJ170CAHM3/I datasheet, SMBJ170CAHM3/I pinout, SMBJ170CAHM3/I application, or SMBJ170CAHM3/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, bidirectional clamping performance, and real-world use cases in automotive-grade power supply protection and I/O line surge suppression.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR over temperature, with a +0.108 %/°C temperature coefficient and 150 °C maximum junction temperature rating.
The device delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with low incremental surge resistance and sub-nanosecond response time. It is rated for repetitive surge duty cycle of 0.01 % 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 clamping initiates; defines safe DC/AC RMS working range. |
| VBR min/max | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤275 V at 2.2 A - Clamped voltage under full-rated surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W (10/1000 µs) - Peak transient energy absorption capacity; supports robust protection against lightning-induced surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at stand-off voltage; negligible power loss and minimal impact on high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial ambient environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during clamping. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or ungrounded sensors without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V DC rails when properly laid out. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring reliability under thermal cycling and vibration. |
| MSL Level 1 | Zero floor life limitation; supports standard SMT reflow without baking or special handling. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance requirements. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop transmitters and RS-485 nodes from ESD and load-dump transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or between signal and ground to clamp ±2 kV ESD (IEC 61000-4-2) and inductive switching spikes. Use Value: Maintains signal integrity below 275 V clamping level while drawing <1 µA leakage at 170 V nominal bus voltage. |
Use Scenario: Safeguarding 12 V supply input of BCM microcontrollers and CAN transceivers against ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Primary front-end TVS on main power rail, positioned upstream of DC/DC converter and LDO regulators. Use Value: Absorbs up to 600 W surge energy without degradation, supporting AEC-Q101-compliant system-level validation. |
| Telecom PoE Midspan Port Protection | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Shielding Power over Ethernet (PoE) midspan injectors from induced surges on 48 V DC pairs during lightning proximity events. IC Role / Device Role / Timing Role: Bidirectional TVS across each data pair and between power pair and ground in IEEE 802.3af/at-compliant designs. Use Value: Symmetric clamping ensures equal protection for positive/negative data polarity; 170 V VWM avoids false triggering during normal PoE negotiation. |
Use Scenario: Protecting voltage-sense inputs monitoring 200–400 V DC link in solar inverters from grid-switching transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: High-VWM TVS placed directly at ADC input divider network to prevent overvoltage damage to precision analog front-end. Use Value: 209 V VBR upper limit ensures margin above 170 V VWM while maintaining fast response (<1 ns) to fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHE3/I | Same electrical specs and SMB package; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use where automotive qualification is not required. | Select when cost sensitivity outweighs halogen-free or automotive compliance needs. |
| SMAJ170CAHM3 | Lower 400 W PPPM rating; SMA (DO-214AC) package with smaller 4.5 mm × 2.7 mm footprint; identical VWM/VBR. | Preferred for space-constrained layouts where 200 W lower surge margin is acceptable. | Choose only if PCB area is critical and surge threat level is limited to IEC 61000-4-5 Level 3. |
Compared with SMBJ170CAHM3/I, the HE3/I variant trades halogen-free content and AEC-Q101 for lower cost, while the SMAJ170CAHM3 reduces surge capability and physical size - making SMBJ170CAHM3/I the optimal choice for automotive-qualified, high-energy, halogen-free designs.
Availability
SMBJ170CAHM3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom PoE midspan protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ170CAHM3/I 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 targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping ratio, and compatibility with automated manufacturing for automotive, industrial, and telecom end equipment.
FAQ
What is the clamping voltage of SMBJ170CAHM3/I at its rated peak pulse current?
The SMBJ170CAHM3/I clamps to a maximum of 275 V at its rated peak pulse current of 2.2 A under the 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88392, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170CAHM3/I maintains this clamping performance across its specified operating temperature range.
Is SMBJ170CAHM3/I qualified for automotive applications?
Yes, SMBJ170CAHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMBJ5.0A–SMBJ188A datasheet. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating SMBJ170CAHM3/I for use in automotive body electronics, infotainment power supplies, and sensor front-ends where reliability under extended thermal and vibration profiles is mandatory.
What does the "CA" suffix indicate in SMBJ170CAHM3/I?
The "CA" suffix in SMBJ170CAHM3/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., SMBJ170A), SMBJ170CAHM3/I has no cathode band marking and functions identically whether voltage stress is applied anode-to-cathode or cathode-to-anode - essential for protecting AC-coupled lines, differential buses, or floating grounds without polarity constraints.
How does the thermal resistance of SMBJ170CAHM3/I affect its power handling?
SMBJ170CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended copper pads. This means that at 5.0 W steady-state dissipation, the junction temperature rises ~500 °C above ambient - far exceeding its 150 °C maximum rating. Therefore, SMBJ170CAHM3/I is intended for transient-only operation (e.g., 600 W for <1 ms), not continuous power dissipation. Its RθJL of 20 °C/W supports short-duration surge energy transfer to PCB copper.
What is the reverse leakage current specification for SMBJ170CAHM3/I at its stand-off voltage?
The SMBJ170CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 170 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance sensing circuits and prevents measurable power loss in always-on 12–48 V systems. The value is verified per Vishay's electrical characteristics table and remains within specification up to 125 °C ambient per derating curves in the datasheet.
SMBJ170CAHM3/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ170CAHM3/I FAQ
1.How can I place an order for SMBJ170CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3/I 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 SMBJ170CAHM3/I reliable?
The price and inventory of SMBJ170CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3/I?
SMBJ170CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3/I 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 SMBJ170CAHM3/I?
For technical support, including SMBJ170CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3/I requirements.
6.How does Aetrix verify that SMBJ170CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3/I 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 SMBJ170CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3/I?
All SMBJ170CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3/I, 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 SMBJ170CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHM3/I Tags
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