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Vishay General Semiconductor - Diodes Division SMCJ170HE3/57T
- Part No.:
- SMCJ170HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170HE3/57T.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,220
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Product details
Overview
SMCJ170HE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of power 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 5.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, DC-DC converters, and automotive power rails against ESD and load dump transients.
For engineers reviewing the SMCJ170HE3/57T datasheet, SMCJ170HE3/57T pinout, SMCJ170HE3/57T application, or SMCJ170HE3/57T equivalent, this AEC-Q101 qualified, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive body control modules, industrial motor drives, and high-reliability 24 V/48 V power systems.
Technical Context
The SMCJ170HE3/57T operates as a silicon avalanche diode with unidirectional polarity, leveraging glass-passivated junction technology for stable breakdown behavior and fast response (<1 ns). Its thermal resistance (RθJA = 75 °C/W) and junction-to-lead resistance (RθJL = 15 °C/W) support reliable power dissipation under repetitive surge conditions when mounted on 8.0 mm × 8.0 mm copper pads.
It complies with ANSI/IEEE C62.35 for transient suppressor definitions and meets UL 497B recognition (QVGQ2, E136766) for protector classification. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, distinguishing it from commercial-grade E3 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 170 V - maximum continuous reverse operating voltage before significant leakage; sets protection threshold for 24 V/48 V systems. |
| Breakdown Voltage (VBR) | 189–209 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| Clamping Voltage (VC) | 275 V at 5.5 A (10/1000 µs) - peak voltage seen by protected circuit; defines worst-case stress on downstream components. |
| Peak Pulse Power (PPPM) | 1500 W - energy-handling capacity for standardized 10/1000 µs surges; supports ISO 7637-2 Pulse 1/2/5a compliance. |
| Operating Temperature | −55 °C to +150 °C - full automotive-grade junction temperature range; enables under-hood deployment. |
| Leakage Current (ID) | 1.0 µA max at VWM - negligible standby power loss; avoids interference in high-impedance sensing circuits. |
| Package | DO-214AB (SMCJ) - industry-standard surface-mount outline with 0.320" body length; compatible with automated pick-and-place. |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads, matte tin-plated terminals solderable per J-STD-002/JESD 22-B102, polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage rail; completes conduction path during reverse-biased transient clamp. |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., battery rail); blocks normal operation but avalanches during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power supplies, with extended temperature cycling and humidity testing. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to environmental degradation, critical for 15+ year automotive service life. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without pre-baking; eliminates moisture-related popcorning risk in high-volume SMT lines. |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Load Dump (Pulse 5a) up to 120 V superimposed on 24 V systems without failure. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - reduces stress margin required for protected ICs like gate drivers and microcontrollers. |
Applications
| Automotive Power Rail Protection | Industrial DC Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground, clamping surges within nanoseconds. Use Value: Limits peak voltage to ≤275 V, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Safeguarding H-bridge driver inputs against inductive kickback from brushed DC motors in factory automation. IC Role / Device Role / Timing Role: Standoff protection device absorbing flyback energy during MOSFET turn-off. Use Value: Clamps 100 V+ spikes to <275 V within <1 ns, avoiding latch-up or gate oxide rupture in half-bridge drivers. |
| Telecom Power Supply Inputs | Renewable Energy Charge Controllers |
Use Scenario: Shielding 48 V telecom rectifier outputs from lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary-level surge suppression ahead of DC-DC converters and PMICs. Use Value: Handles 1500 W pulses without degradation, maintaining system uptime in harsh outdoor environments. |
Use Scenario: Protecting solar charge controller inputs from voltage reversals and grid-switching transients in off-grid inverters. IC Role / Device Role / Timing Role: Reverse-polarity and overvoltage guard on PV string input terminals. Use Value: Withstands bidirectional stress via unidirectional configuration with series blocking diode; rated for −40 °C to +105 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3/52T | Lower PPPM (600 W), smaller SMB package (DO-214AA), same VWM/VBR/VC specs. | Suitable for space-constrained PCBs with lower surge exposure (e.g., consumer IoT sensors). | Select when board area is limited and peak surge energy does not exceed 600 W. |
| SMCJ170A-E3/57T | Same package and electrical specs, but commercial-grade (E3) - no AEC-Q101 qualification or JESD 201 Class 2 whisker test. | Acceptable for non-automotive industrial use where qualification documentation is not mandated. | Choose only if AEC-Q101 compliance and automotive traceability are not required. |
Compared with SMCJ170HE3/57T, SMBJ170AHE3/52T trades surge capacity for footprint reduction, while SMCJ170A-E3/57T omits automotive qualification - making SMCJ170HE3/57T the sole choice for AEC-Q101–mandated 24 V/48 V power rail protection requiring 1500 W handling.
Availability
SMCJ170HE3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and telecom power supply designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for SMCJ170HE3/57T 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 reliability, tight VBR tolerances, and repeatable clamping performance under thermal stress.
FAQ
What is the clamping voltage of the SMCJ170HE3/57T at its rated peak pulse current?
The SMCJ170HE3/57T has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMCJ170HE3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ170HE3/57T suitable for automotive applications?
Yes, the SMCJ170HE3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its −55 °C to +150 °C operating junction temperature range, JESD 201 Class 2 whisker resistance, and UL 497B recognition (file E136766) confirm compliance with automotive reliability standards. The SMCJ170HE3/57T is commonly deployed in body control modules, battery management systems, and ADAS power supplies where sustained surge immunity is mandatory.
How does the SMCJ170HE3/57T differ from the commercial-grade SMCJ170A-E3/57T?
The SMCJ170HE3/57T differs from SMCJ170A-E3/57T primarily in qualification and process control: the HE3 suffix denotes AEC-Q101 qualification, JESD 201 Class 2 whisker testing, and enhanced traceability for automotive production. Electrically, both share identical VWM (170 V), VBR (189–209 V), VC (275 V), and PPPM (1500 W) specifications. The SMCJ170HE3/57T is required where automotive PPAP documentation and long-term reliability validation are mandated - unlike the commercial-grade SMCJ170A-E3/57T.
What is the thermal resistance of the SMCJ170HE3/57T, and how does it affect layout design?
The SMCJ170HE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. These values dictate that effective heat spreading is essential for repeated surge duty cycles; designers must allocate sufficient copper area and avoid thermal bottlenecks in the ground plane. The SMCJ170HE3/57T's RθJL enables efficient conduction into the PCB, reducing localized heating during transient events.
Can the SMCJ170HE3/57T be used in bi-directional protection circuits?
No, the SMCJ170HE3/57T is a unidirectional TVS diode, identifiable by its cathode band marking and specified VBR/VWM parameters for reverse-biased operation only. For bi-directional protection, Vishay offers the SMCJ170CA variant (e.g., SMCJ170CAHE3/57T), which provides symmetrical clamping in both polarities. Using the SMCJ170HE3/57T in a bi-directional configuration would result in forward conduction and potential failure during positive transients - the SMCJ170HE3/57T must be oriented with cathode toward the protected line.
SMCJ170HE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 4.9A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ170HE3/57T FAQ
1.How can I place an order for SMCJ170HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170HE3/57T 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 SMCJ170HE3/57T reliable?
The price and inventory of SMCJ170HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170HE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170HE3/57T?
SMCJ170HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170HE3/57T 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 SMCJ170HE3/57T?
For technical support, including SMCJ170HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170HE3/57T requirements.
6.How does Aetrix verify that SMCJ170HE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170HE3/57T 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 SMCJ170HE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170HE3/57T?
All SMCJ170HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170HE3/57T, 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 SMCJ170HE3/57T part is unused and in its original packaging.
Return procedure for SMCJ170HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170HE3/57T Tags
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