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Vishay General Semiconductor - Diodes Division SMBJ170AHE3/5B
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- Part No.:
- SMBJ170AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHE3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,908
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Product details
Overview
SMBJ170AHE3/5B 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 DC 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 - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the SMBJ170AHE3/5B datasheet, SMBJ170AHE3/5B pinout, SMBJ170AHE3/5B application, or SMBJ170AHE3/5B equivalent, key selection criteria include its AEC-Q101 qualification status, low thermal resistance (RθJL = 20 °C/W), 150 °C max junction temperature, and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This TVS diode operates as a clamping device: 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 fast response time (<1 ns).
The SMBJ170AHE3/5B is rated for repetitive 600 W surges (10/1000 µs, 0.01% duty cycle), derated linearly above 25 °C ambient per Fig. 2, and supports peak forward surge current up to 100 A (8.3 ms half-sine). Polarity is marked by cathode band; terminals are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection threshold. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown range ensuring reliable triggering margin above VWM. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24–48 V systems. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in high-ambient industrial environments with minimal derating. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper pads without external heatsink. |
| AEC-Q101 | Qualified - Meets automotive-grade reliability requirements for temperature cycling, HTRB, and surge endurance. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band on body 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); not active during normal TVS clamping operation. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., +170 V rail); avalanche conduction occurs here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge life testing - suitable for under-hood and infotainment power rails. |
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe transients such as load dump (ISO 7637-2) and EFT bursts without cascaded staging. |
| Low RθJL = 20 °C/W | Minimizes junction temperature rise during repeated surges; sustains performance in compact PCB layouts with limited copper area. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability across humidity, bias stress, and thermal aging. |
| MSL Level 1 (260 °C reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Industrial Power Supply Protection | Telecom DC Feeder Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V DC input stage of programmable logic controllers (PLCs) against inductive switching spikes and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between +48 V rail and chassis ground, triggered within <1 ns to limit voltage to ≤275 V. Use Value: Prevents damage to upstream DC-DC controllers and downstream FPGA power domains during 100 A/10 ms surge events. |
Use Scenario: Safeguarding -48 V DC feeding circuits in central office line cards exposed to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Reverse-polarity connected TVS (cathode to -48 V rail) clamping positive transients to ground while blocking steady-state reverse bias. Use Value: Maintains system uptime by absorbing >600 W surges without degradation, meeting Telcordia GR-1089-CORE Level 3 immunity. |
| Automotive Body Control Module (BCM) | Sensor Signal Line Protection |
|
Use Scenario: Protecting 12 V/24 V supply inputs of BCMs in commercial vehicles subject to ISO 7637-2 Pulse 5a (load dump) up to 60 V. IC Role / Device Role / Timing Role: Primary TVS in series with fuse and LC filter; conducts full surge current to ground during 120 ms, 60 V transients. Use Value: AEC-Q101 qualification ensures survival through 1000+ load dump cycles without parameter drift or failure. |
Use Scenario: Shielding analog outputs of pressure sensors in HVAC control units from ESD and cable discharge events on 0–5 V output lines. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 50 pF at 0 V) placed directly at connector, clamping ±8 kV contact ESD per IEC 61000-4-2. Use Value: Preserves signal integrity with <0.5% gain error at 1 kHz while suppressing transients below ADC input damage threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-E3/5B | Commercial-grade version; lacks AEC-Q101 qualification and halogen-free certification. | Approved for non-automotive industrial use only; not validated for automotive temperature cycling or surge lifetime. | Select when cost sensitivity outweighs automotive qualification requirements and environmental compliance is not mandated. |
| SMCJ170AHE3/5B | Same electrical specs but in larger SMC (DO-214AB) package; higher PPPM = 1500 W, RθJL = 15 °C/W. | Better suited for high-energy surges where board space permits larger footprint and enhanced thermal dissipation. | Choose when system-level surge testing exceeds 600 W or when extended thermal margin is required in high-power enclosures. |
Compared with SMBJ170A-E3/5B, the SMBJ170AHE3/5B adds automotive qualification and halogen-free compliance without altering clamping behavior; versus SMCJ170AHE3/5B, it trades 900 W extra pulse power and lower thermal resistance for 30% smaller PCB area - critical in space-constrained modules.
Availability
SMBJ170AHE3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeder lines, automotive body control modules, and sensor interface protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ170AHE3/5B 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping performance and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ170AHE3/5B at its rated peak pulse current?
The SMBJ170AHE3/5B has a maximum clamping voltage (VC) of 275 V at its specified peak pulse current (IPPM) of 2.2 A, measured using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is confirmed in the Vishay datasheet Document Number 88392, page 2. The SMBJ170AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ170AHE3/5B suitable for automotive applications?
Yes, SMBJ170AHE3/5B is AEC-Q101 qualified, making it suitable for automotive applications including body control modules, infotainment power rails, and lighting drivers. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. Its 150 °C maximum junction temperature, robust surge endurance, and validation across temperature cycling and HTRB testing confirm its readiness for under-hood and cabin environments - a key distinction from commercial-grade variants like SMBJ170A-E3/5B.
What package type does SMBJ170AHE3/5B use, and what are its mounting requirements?
SMBJ170AHE3/5B uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.20 mm and a recommended 5.0 mm × 5.0 mm copper pad per terminal for optimal thermal performance. The cathode is marked by a black band. Mounting requires standard lead-free reflow per MSL Level 1 (peak 260 °C), and the matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards - all verified in the SMBJ170AHE3/5B datasheet.
How does SMBJ170AHE3/5B differ from bidirectional versions like SMBJ170CA?
SMBJ170AHE3/5B is unidirectional, with polarity defined by cathode marking and intended for DC line protection where reverse conduction must be blocked. In contrast, SMBJ170CA is bidirectional and symmetrical - suitable for AC lines or data buses requiring clamping in both polarities. The SMBJ170AHE3/5B exhibits forward voltage drop (~3.5 V at 50 A) and reverse leakage <1 µA at 170 V, whereas SMBJ170CA has identical VBR in both directions and no forward conduction path. Their pinouts are identical, but functional roles differ fundamentally.
What is the thermal resistance from junction to ambient (RθJA) for SMBJ170AHE3/5B?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ170AHE3/5B is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. However, its more critical thermal metric is junction-to-lead resistance (RθJL) of 20 °C/W, which governs heat transfer to the PCB traces. This value enables effective thermal management in compact layouts without forced airflow or heatsinks - a key design advantage confirmed in Vishay Document Number 88392, page 3.
SMBJ170AHE3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ170AHE3/5B FAQ
1.How can I place an order for SMBJ170AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHE3/5B 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 SMBJ170AHE3/5B reliable?
The price and inventory of SMBJ170AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHE3/5B?
SMBJ170AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHE3/5B 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 SMBJ170AHE3/5B?
For technical support, including SMBJ170AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHE3/5B requirements.
6.How does Aetrix verify that SMBJ170AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHE3/5B 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 SMBJ170AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170AHE3/5B?
All SMBJ170AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHE3/5B, 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 SMBJ170AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ170AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHE3/5B Tags
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