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Vishay General Semiconductor - Diodes Division SMCJ170CHE3/57T
- Part No.:
- SMCJ170CHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CHE3/57T.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,721
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Product details
Overview
SMCJ170CHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge protection in 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 ECUs against lightning-induced transients and inductive switching spikes.
For engineers reviewing the SMCJ170CHE3/57T datasheet, SMCJ170CHE3/57T pinout, SMCJ170CHE3/57T application, or SMCJ170CHE3/57T equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification for automotive use, RoHS-compliant HE3 suffix with JESD 201 Class 2 whisker resistance, and thermal derating behavior above 25 °C ambient.
Technical Context
The SMCJ170CHE3/57T operates as a unidirectional avalanche diode, conducting only in reverse bias when transient voltage exceeds VBR, with low incremental surge resistance ensuring stable clamping during 1500 W pulses. Its glass-passivated junction enables fast response time (<1 ns) and repeatable breakdown characteristics across temperature.
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 75 °C/W junction-to-ambient thermal resistance and supports operating junction temperatures from –55 °C to +150 °C. 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 |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 275 V at 5.5 A - Clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush tolerance in power rail protection. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance to ambient on standard PCB pad layout; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
SMCJ170CHE3/57T uses the DO-214AB (SMCJ) surface-mount package: molded epoxy case with matte tin-plated leads, 0.320" body length, cathode band marking on one end. Terminals are solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (cathode-banded side is cathode) | Connected to ground or low-impedance return in unidirectional TVS configuration; polarity must match circuit topology. |
| Cathode | Reverse-biased surge conduction node | Connected to protected line (e.g., 12 V rail); conducts transient energy to ground when VLINE > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; supports Tier-1 ECU designs. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| Low incremental surge resistance | Minimizes VC rise during high-current transients, reducing voltage overshoot on protected ICs and MOSFETs. |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without moisture-related popcorn failure risk. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, critical for long-life automotive and industrial deployments. |
Applications
| Automotive Power Rail Protection | Industrial DC-DC Converter Input |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power supplies in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients exceeding 170 V. Use Value: Limits clamped voltage to ≤275 V during 1500 W surges, preventing damage to 36 V-rated LDOs and MCU voltage regulators. |
Use Scenario: Safeguarding isolated DC-DC converter primary-side inputs in factory automation PLCs exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Surge suppression device mounted directly at converter input terminals to absorb repetitive 10/1000 µs transients. Use Value: Withstands 200 A single-half-sine forward surge and maintains <1 µA leakage at 170 V, preserving efficiency in always-on systems. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Stage |
Use Scenario: Shielding RS-485 transceiver power pins in base station backhaul modules from induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between VCC and GND to suppress common-mode transients coupled onto supply rails. Use Value: Delivers 1500 W pulse power handling and 75 °C/W thermal resistance, enabling reliable operation without external heatsinks. |
Use Scenario: Protecting gate drivers and half-bridge MOSFETs in smart washing machine motor inverters from inductive kickback during PWM commutation. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed across DC bus rails to limit voltage spikes during switching transitions. Use Value: Achieves <1 ns response time and 275 V clamping at 5.5 A, preventing dv/dt-induced shoot-through and gate oxide rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR range but reduced surge capacity. | Suitable for space-constrained consumer electronics with lower surge threat levels (IEC 61000-4-5 Level 2). | Select when board area is limited and peak surge energy does not exceed 400 W. |
| SMCJ170A-E3/57T | Commercial-grade (E3 suffix), no AEC-Q101 qualification or JESD 201 Class 2 whisker testing; identical electrical specs and DO-214AB package. | Applicable in non-automotive industrial or computing applications where automotive reliability is not mandated. | Choose for cost-sensitive designs where AEC-Q101 and whisker resistance are not required. |
Compared with SMCJ170CHE3/57T, SMAJ170AHE3/A trades surge robustness for footprint reduction, while SMCJ170A-E3/57T retains mechanical and electrical equivalence but omits automotive qualification - making the HE3 variant uniquely suited for safety-critical vehicular deployments requiring traceable reliability validation.
Availability
SMCJ170CHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial DC-DC converters, and telecom line interface protection requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCJ170CHE3/57T 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where consistent clamping performance and long-term stability under thermal cycling are mandatory.
FAQ
What is the clamping voltage of the SMCJ170CHE3/57T at its rated peak pulse current?
The SMCJ170CHE3/57T has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMCJ170CHE3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ170CHE3/57T qualified for automotive applications?
Yes, the SMCJ170CHE3/57T is AEC-Q101 qualified, as confirmed by Vishay's documentation and the HE3 suffix designation. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - validating its suitability for under-hood and cabin-mounted automotive electronics. The SMCJ170CHE3/57T meets these requirements without derating in standard mounting configurations.
What does the "HE3" suffix indicate in SMCJ170CHE3/57T?
The "HE3" suffix in SMCJ170CHE3/57T denotes two key attributes: "H" indicates AEC-Q101 qualification, and "E3" specifies RoHS-compliant matte tin plating with JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade "E3" parts and confirms compliance with automotive reliability standards. The SMCJ170CHE3/57T is therefore traceable to automotive-grade process controls and screening protocols.
How does the thermal performance of SMCJ170CHE3/57T affect its surge capability?
The SMCJ170CHE3/57T exhibits 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads. Its peak pulse power rating of 1500 W is specified at TA = 25 °C and must be derated linearly above that temperature per Figure 2 in the datasheet. At 100 °C ambient, the SMCJ170CHE3/57T retains ~50 % of its rated PPPM, making thermal layout critical for repeated surge duty cycles.
Can SMCJ170CHE3/57T be used in bi-directional protection circuits?
No, the SMCJ170CHE3/57T is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and presence of cathode band marking. Bi-directional operation requires the "CA" variant (e.g., SMCJ170CA), which lacks polarity marking and conducts symmetrically in both directions. Using SMCJ170CHE3/57T in bi-directional configurations risks forward conduction and failure during positive transients.
SMCJ170CHE3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ170CHE3/57T FAQ
1.How can I place an order for SMCJ170CHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CHE3/57T 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 SMCJ170CHE3/57T reliable?
The price and inventory of SMCJ170CHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170CHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CHE3/57T?
SMCJ170CHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CHE3/57T 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 SMCJ170CHE3/57T?
For technical support, including SMCJ170CHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CHE3/57T requirements.
6.How does Aetrix verify that SMCJ170CHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170CHE3/57T 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 SMCJ170CHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170CHE3/57T?
All SMCJ170CHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CHE3/57T, 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 SMCJ170CHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ170CHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CHE3/57T Tags
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