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Vishay General Semiconductor - Diodes Division SMBJ170D-M3/H
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- Part No.:
- SMBJ170D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170D-M3/H.pdf
- Description:
- TVS DIODE 170VWM 270VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,412
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Product details
Overview
SMBJ170D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 170 V stand-off voltage (VWM), 192–206 V breakdown voltage (VBR) at 1 mA, 2.23 A peak pulse current (IPPM), and 270 V clamping voltage (VC) under 10/1000 μs surge. It delivers 600 W peak pulse power for protecting MOSFETs and signal lines in industrial power supplies.
For engineers reviewing the SMBJ170D-M3/H datasheet, SMBJ170D-M3/H pinout, SMBJ170D-M3/H application, or SMBJ170D-M3/H equivalent, key selection criteria include unidirectional polarity, 170 V reverse stand-off rating, 270 V clamping performance at rated surge, thermal resistance of 125 °C/W (junction-to-ambient), and M3/H halogen-free RoHS-compliant tape-and-reel packaging for automated SMT assembly.
Technical Context
This TVS diode operates as a clamping-type overvoltage protection device, triggered when reverse voltage exceeds its 192–206 V breakdown range. It responds within picoseconds to transients induced by inductive switching or ESD events, limiting downstream voltage to ≤270 V at 2.23 A IPPM.
Designed for unidirectional DC line protection, it features a cathode band marking, 0.5 μA max reverse leakage at 170 V, and thermal derating per Fig. 2 - power dissipation drops from 1.0 W at 25 °C ambient to zero at 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 192 V / 206 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 270 V at 2.23 A - clamping voltage defines worst-case stress on protected IC or MOSFET during surge |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform, enabling robust lightning/surge immunity |
| RθJA | 125 °C/W - thermal resistance limits junction temperature rise under 1.0 W steady-state dissipation |
| Leakage ID | ≤0.5 μA at 170 V - negligible standby current avoids system power loss or false triggering |
| Polarity | Unidirectional - cathode-band marked device intended for DC-biased line protection only |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; forms current path during reverse-bias clamping |
| Cathode | High-side connection point | Marked with band; connects to protected line; blocks current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking |
| 600 W PPPM (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) in properly designed layouts |
| Low 0.5 μA leakage at VWM | Prevents measurable loading on high-impedance sensor or reference circuits |
| MSL Level 1 rating | Allows single-pass reflow without baking, reducing manufacturing complexity and cost |
| Halogen-free M3 construction | Meets IPC-1752A material declaration requirements for green electronics compliance |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense inputs against transients from contactor switching and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between high-side MOSFET gate and source, or across DC bus sense resistors. Use Value: Limits transient overshoot to ≤270 V, preventing gate oxide rupture in 200 V-rated SiC MOSFETs and maintaining ADC accuracy. | Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs feeding backplane distribution. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, upstream of POL converters and hot-swap controllers. Use Value: Absorbs 600 W surges while holding clamped voltage below 270 V, ensuring downstream 300 V-rated capacitors remain within safe operating area. |
| Medical Imaging Power Modules | Renewable Energy Inverters |
Use Scenario: Protection of isolated feedback optocouplers and auxiliary bias windings in X-ray generator HV supplies. IC Role / Device Role / Timing Role: Secondary-side TVS on auxiliary 15–24 V bias rails, guarding against reflected transients from primary-side IGBT switching. Use Value: Sub-μA leakage avoids drift in precision current mirrors; 192–206 V VBR aligns with 200 V-rated optocoupler CTR degradation thresholds. | Use Scenario: DC-link overvoltage clamping in solar string inverters exposed to lightning-induced surges on long PV array wiring. IC Role / Device Role / Timing Role: Parallel-connected unidirectional TVS on 1000 V DC-link, coordinated with MOVs for staged energy absorption. Use Value: 270 V clamping at 2.23 A enables effective pre-clamp before MOV activation, reducing stress on IGBT modules during Category III surges. |
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-M3/H | Bidirectional variant; symmetric VBR/VWM (170 V both polarities); no cathode band | Required where AC-coupled or floating signal lines need protection in both directions | Select SMBJ170A-M3/H only if bidirectional clamping is mandated by circuit topology; not drop-in for unidirectional designs |
| SMCJ170A | Larger SMC (DO-214AB) package; higher 1500 W PPPM; same 170 V VWM but 200–216 V VBR range | Used where board space allows larger footprint and higher surge margin is required (e.g., outdoor equipment) | SMCJ170A offers 2.5× pulse power but requires PCB redesign; not pin-compatible due to different pad layout and body size |
Compared with SMBJ170D-M3/H, SMBJ170A-M3/H supports AC signal paths but lacks polarity-specific blocking, while SMCJ170A provides greater surge headroom at the cost of footprint and thermal resistance - making SMBJ170D-M3/H optimal for space-constrained, DC-biased industrial controls requiring precise 170 V standoff.
Availability
SMBJ170D-M3/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, medical imaging modules, and renewable energy inverters requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ170D-M3/H 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 qualification.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in industrial, telecom, and medical power systems where precise clamping and low leakage are critical.
FAQ
What is the breakdown voltage range for SMBJ170D-M3/H?
The SMBJ170D-M3/H has a guaranteed breakdown voltage (VBR) range of 192 V to 206 V at 1 mA test current, reflecting ±3.5 % tolerance. This tight specification ensures consistent clamping behavior across production units and simplifies coordination with system overvoltage protection thresholds in industrial power designs using the SMBJ170D-M3/H.
Does SMBJ170D-M3/H support bidirectional transient suppression?
No, SMBJ170D-M3/H is strictly unidirectional - it conducts only when reverse-biased beyond its 192–206 V VBR. For bidirectional protection, Vishay offers the SMBJ170A-M3/H variant. The "D" suffix in SMBJ170D-M3/H explicitly denotes unidirectional polarity, confirmed by the cathode band marking on the SMB package body.
What is the maximum clamping voltage of SMBJ170D-M3/H under surge conditions?
The SMBJ170D-M3/H clamps to a maximum of 270 V when subjected to its rated 2.23 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This VC value defines the upper voltage limit imposed on protected circuitry during surge events and is validated per ANSI/IEEE C62.35 test methods for the SMBJ170D-M3/H.
Is SMBJ170D-M3/H compatible with lead-free reflow processes?
Yes, SMBJ170D-M3/H is rated MSL Level 1 per J-STD-020 and qualified for lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated terminals meet J-STD-002 solderability requirements, and the M3 suffix confirms compliance with JESD 201 Class 2 whisker resistance - all verified in the official Vishay documentation for SMBJ170D-M3/H.
How does the thermal resistance of SMBJ170D-M3/H affect its power handling?
SMBJ170D-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W on minimum recommended pad layout. At 25 °C ambient, this limits continuous power dissipation to 1.0 W; above that temperature, derating follows Fig. 5 - e.g., at 75 °C ambient, max PD drops to ~0.6 W. This directly constrains sustained leakage or fault-current duty cycles for the SMBJ170D-M3/H.
SMBJ170D-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 192V
- Voltage - Clamping (Max) @ Ipp:
- 270V
- Current - Peak Pulse (10/1000µs):
- 2.23A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170D-M3/H FAQ
1.How can I place an order for SMBJ170D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170D-M3/H 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 SMBJ170D-M3/H reliable?
The price and inventory of SMBJ170D-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ170D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170D-M3/H?
SMBJ170D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170D-M3/H 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 SMBJ170D-M3/H?
For technical support, including SMBJ170D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170D-M3/H requirements.
6.How does Aetrix verify that SMBJ170D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170D-M3/H 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 SMBJ170D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ170D-M3/H?
All SMBJ170D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170D-M3/H, 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 SMBJ170D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ170D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170D-M3/H Tags
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