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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3_A/I
- Part No.:
- SMBJ170CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3_A/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,196
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Product details
Overview
SMBJ170CAHM3_A/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 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 - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ170CAHM3_A/I datasheet, SMBJ170CAHM3_A/I pinout, SMBJ170CAHM3_A/I application, or SMBJ170CAHM3_A/I equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 150 °C maximum junction temperature supports operation in high-ambient industrial environments.
The device meets MSL Level 1 per J-STD-020, with lead finish qualified to J-STD-002 and JESD22-B102 solderability standards. Its 20 °C/W junction-to-lead thermal resistance enables effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads - critical for sustaining repetitive surge events under 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 170 V DC bus or AC peak applications. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown range ensures reliable triggering across manufacturing lot and temperature variation. |
| VC @ IPPM | 275 V at 2.2 A - Clamping voltage during 10/1000 µs transient; limits downstream IC stress to ≤275 V under 600 W surge. |
| PPPM | 600 W - Peak pulse power handling capability with standard 10/1000 µs waveform; validated for lighting and inductive load switching events. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; determines allowable power derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive modules and industrial motor drives. |
| Construction | Halogen-free, RoHS-compliant, AEC-Q101 qualified - Meets automotive reliability requirements and environmental compliance mandates. |
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); cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode-band side not applicable) | One side of symmetrical PN junction; connects to either line in differential or AC path - no fixed polarity. |
| Anode | Terminal 2 (opposite end) | Second terminal of bidirectional structure; forms clamping path in both voltage polarities during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or dual-rail power supplies without external polarity management. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V–48 V systems when properly laid out. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics; includes HTOL, TC, UHAST, and ESD testing per stress test plan. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85% RH; compatible with standard SMT reflow profiles up to 260 °C peak. |
| Low leakage & stable VBR | <1.0 µA at 170 V and ±0.057%/°C tempco ensure minimal standby loss and predictable clamping across -55 °C to +150 °C. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from 24 V solenoid coils and relay loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across driver output and ground to clamp negative flyback and positive overshoot simultaneously. Use Value: Limits voltage excursion to ≤275 V during 10/1000 µs transients, preventing latch-up or oxide rupture in 3.3 V/5 V microcontrollers and isolated gate drivers. |
Use Scenario: Surge suppression on LIN bus and switched 12 V power inputs in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 1 (inductive decay) and Pulse 3a/b (switching noise) without degradation. Use Value: Maintains <1.0 µA leakage at 170 V standoff, ensuring low quiescent current in always-on vehicle networks while surviving 150 °C under-hood ambient. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for PoE-powered remote radios and base station control cards subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional clamping element on DC input rail, coordinated with upstream GDT or MOV for staged energy diversion. Use Value: 600 W rating and 275 V clamping enable coordination with Type 2 SPDs to meet IEC 61643-21 Class II requirements for telecom infrastructure. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers, thermocouple amplifiers) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point to shunt fast ESD (IEC 61000-4-2 ±8 kV contact) before signal conditioning stages. Use Value: Glass-passivated junction ensures <1.0 µA leakage at 170 V, preserving accuracy of µV-level sensor measurements while responding in <1 ns. |
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_A/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-AEC-Q101 qualified). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and full AEC-Q101 validation is unnecessary. |
| SMLJ170CAHM3_A/I | Same VWM/VC ratings but higher 1500 W PPPM rating in larger SMC (DO-214AB) package. | Requires larger PCB footprint and different thermal layout; suited for higher-energy surge environments (e.g., outdoor telecom). | Choose when system-level surge testing exceeds 600 W capability and board space allows SMC footprint. |
Compared with SMBJ170CAHM3_A/I, the HE3 variant trades AEC-Q101 qualification for lower cost in non-automotive settings, while the SMLJ170CAHM3_A/I offers 2.5× higher surge capacity at the expense of package size and thermal interface redesign.
Availability
SMBJ170CAHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ170CAHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series targets robust transient suppression in space-constrained, high-reliability applications - particularly automotive, industrial, and telecom systems demanding AEC-Q101 qualification and precise clamping behavior.
FAQ
What is the clamping voltage of SMBJ170CAHM3_A/I at its rated peak pulse current?
The SMBJ170CAHM3_A/I 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 ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170CAHM3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) and is validated for repetitive surge duty cycles up to 0.01%.
Is SMBJ170CAHM3_A/I suitable for automotive applications?
Yes, SMBJ170CAHM3_A/I is AEC-Q101 qualified and specifically designed for automotive use cases including body control modules, infotainment power rails, and LIN/CAN node protection. Its halogen-free, RoHS-compliant construction (HM3 suffix), MSL Level 1 moisture sensitivity rating, and 150 °C maximum junction temperature meet stringent automotive reliability requirements. The SMBJ170CAHM3_A/I undergoes HTOL, temperature cycling, and ESD testing per AEC-Q101 stress test plan.
How does the bidirectional nature of SMBJ170CAHM3_A/I affect its placement on a PCB?
The SMBJ170CAHM3_A/I has no polarity marking and functions identically in both directions, so it can be placed across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs (RS-485, CAN), AC power inputs, or dual-rail supplies. Unlike unidirectional TVS diodes, the SMBJ170CAHM3_A/I eliminates orientation errors during automated assembly and avoids the need for series-back-to-back configurations. Its DO-214AA package fits standard SMB footprints with 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal performance.
What is the maximum leakage current of SMBJ170CAHM3_A/I at its standoff voltage?
The SMBJ170CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 170 V standoff voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on systems and preserves signal integrity in high-impedance sensor interfaces. Leakage remains below 5.0 µA across the full -55 °C to +150 °C operating junction temperature range, supporting stable performance in harsh thermal environments.
Does SMBJ170CAHM3_A/I require heatsinking for standard surge conditions?
No external heatsink is required for SMBJ170CAHM3_A/I under standard single-pulse or low-duty-cycle surge conditions. Its RθJA of 100 °C/W is specified for mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - sufficient to handle 600 W peak pulses with 0.01% duty cycle. For repetitive surge applications, thermal design should verify junction temperature rise using PD = 5.0 W derating curves (Fig. 2 in datasheet). The SMBJ170CAHM3_A/I's RθJL of 20 °C/W further supports conduction cooling through PCB traces.
SMBJ170CAHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SMBJ170CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3_A/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_A/I reliable?
The price and inventory of SMBJ170CAHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3_A/I?
SMBJ170CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3_A/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_A/I?
For technical support, including SMBJ170CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ170CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3_A/I?
All SMBJ170CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHM3_A/I Tags
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