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Vishay General Semiconductor - Diodes Division SMBJ170HE3/5B
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- Part No.:
- SMBJ170HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170HE3/5B.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,419
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Product details
Overview
SMBJ170HE3/5B 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 stand-off voltage (VWM), 189–209 V breakdown voltage (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 - deployed in industrial motor drives to safeguard MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMBJ170HE3/5B datasheet, SMBJ170HE3/5B pinout, SMBJ170HE3/5B application, or SMBJ170HE3/5B equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification status, clamping performance under repetitive surge duty cycle (0.01%), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA reverse leakage at VWM), then rapidly avalanches below 275 V to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance across temperature (-55 °C to +150 °C).
The SMBJ170HE3/5B is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports RoHS-compliant and halogen-free variants (HE3 suffix denotes AEC-Q101 qualification), and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors - with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 170 V nominal systems. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed avalanche onset range; ensures predictable triggering above system operating voltage. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during 10/1000 µs transient; limits stress on protected MOSFET or controller IC. |
| PPPM | 600 W - Peak pulse power handling capability; sustains short-duration surges without degradation under 0.01% duty cycle. |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); validates robustness against motor commutation spikes. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in enclosed industrial enclosures without active cooling. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point | Connected to protected circuit node (e.g., DC bus or signal line); clamps to cathode when voltage exceeds VBR. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes shunt path for transient current diversion. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for industrial control units requiring extended lifetime validation. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or solenoid switching without failure under defined duty cycle. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping - critical for protecting 200 V-rated MOSFETs in 170 V DC-link applications. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter drift <±5% over 10-year field life at rated conditions. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of IGBT gate driver inputs against voltage spikes induced by fast-switching inverter stages. IC Role / Device Role / Timing Role: Shunt TVS placed between gate and source, triggered within <1 ns to clamp transients below driver IC absolute maximum rating. Use Value: Prevents gate oxide rupture in 600 V IGBTs by limiting transient voltage to ≤275 V while sustaining 2.2 A surge current. |
Use Scenario: Input-stage surge suppression on -48 V DC telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side distribution rail, coordinated with upstream MOVs and gas discharge tubes. Use Value: Provides precise 170 V standoff and sub-275 V clamping to avoid brownout during surge events while maintaining system uptime. |
| Automotive Body Control Modules | Industrial PLC I/O Terminals |
|
Use Scenario: Protection of LIN bus transceivers and microcontroller GPIOs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS on supply rail and data lines, leveraging AEC-Q101 qualification for automotive environmental compliance. Use Value: Survives repeated 12 V/24 V load dump tests (ISO 16750-2) without parameter shift or catastrophic failure. |
Use Scenario: Field-side analog input protection in programmable logic controllers interfacing with 4–20 mA sensors in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on sensor loop return path, absorbing ESD and inductive kickback from solenoid valves. Use Value: Maintains <1.0 µA leakage at 170 V to avoid measurement error in precision current-loop circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMB package. | Lacks automotive qualification - unsuitable for automotive BOMs requiring AEC-Q101 traceability. | Select SMBJ170HE3/5B when automotive or extended reliability validation is required; otherwise SMBJ170A-E3/5B offers cost advantage. |
| SMLJ170AHE3/5B | Higher 1500 W PPPM rating, same VWM/VC, but in larger SMC (DO-214AB) package - 2.5× footprint area. | Requires PCB layout change; suited for higher-energy surge environments where 600 W is marginal. | Choose SMLJ170AHE3/5B only if system-level surge testing exceeds SMBJ170HE3/5B's 600 W limit - otherwise SMBJ170HE3/5B saves board space. |
Compared with SMBJ170A-E3/5B, SMBJ170HE3/5B adds AEC-Q101 qualification without electrical trade-offs; versus SMLJ170AHE3/5B, it delivers identical clamping performance in 40% smaller footprint but with lower surge energy capacity - making SMBJ170HE3/5B optimal for space-constrained industrial and automotive modules needing certified reliability.
Availability
SMBJ170HE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC I/O terminals requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ170HE3/5B 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 targets high-reliability transient suppression in harsh environments - engineered for consistent clamping performance, low leakage, and robust surge endurance across automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMBJ170HE3/5B at its rated peak pulse current?
The SMBJ170HE3/5B 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 guarantees that protected circuitry sees no more than 275 V during transient events - a critical parameter for ensuring compatibility with 200 V-rated power semiconductors. The SMBJ170HE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ170HE3/5B suitable for automotive applications?
Yes, SMBJ170HE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per automotive requirements. The SMBJ170HE3/5B is explicitly recommended for body control modules, infotainment power rails, and LIN/CAN interface protection where qualification evidence is mandatory - unlike commercial-grade variants such as SMBJ170A-E3/5B.
What is the reverse leakage current specification for SMBJ170HE3/5B at its stand-off voltage?
At its 170 V stand-off voltage (VWM), the SMBJ170HE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, per the electrical characteristics table in Vishay document 88392. This ultra-low leakage ensures minimal power loss and avoids interference in high-impedance sensing circuits - a key requirement for precision analog inputs in PLCs and telecom monitoring systems. The SMBJ170HE3/5B maintains leakage <5.0 µA up to +125 °C.
Does SMBJ170HE3/5B have a bidirectional variant?
No, SMBJ170HE3/5B is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ170CA), which provide symmetrical clamping in both polarities and omit polarity markings. The SMBJ170HE3/5B's unidirectional architecture makes it ideal for DC rail protection where polarity is fixed - offering tighter VBR tolerance and lower leakage than equivalent bidirectional types.
What is the thermal resistance and how does it affect SMBJ170HE3/5B's power derating?
The SMBJ170HE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value directly governs power derating: at 75 °C ambient, its 5.0 W steady-state power dissipation (PD) must be reduced to ~2.5 W to maintain TJ ≤ 150 °C. Derating curves in Figure 2 of datasheet 88392 confirm linear reduction above 25 °C - essential for thermal design in sealed industrial enclosures. The SMBJ170HE3/5B's RθJA is validated for its specific SMB package and pad layout.
SMBJ170HE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 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)
SMBJ170HE3/5B FAQ
1.How can I place an order for SMBJ170HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170HE3/5B 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 SMBJ170HE3/5B reliable?
The price and inventory of SMBJ170HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ170HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170HE3/5B?
SMBJ170HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170HE3/5B 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 SMBJ170HE3/5B?
For technical support, including SMBJ170HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170HE3/5B requirements.
6.How does Aetrix verify that SMBJ170HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ170HE3/5B 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 SMBJ170HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ170HE3/5B?
All SMBJ170HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170HE3/5B, 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 SMBJ170HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ170HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170HE3/5B Tags
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