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Vishay General Semiconductor - Diodes Division SMCJ170-E3/57T
- Part No.:
- SMCJ170-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170-E3/57T.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
SMCJ170-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) 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 range (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 - deployed in automotive power electronics and industrial motor drives.
For engineers reviewing the SMCJ170-E3/57T datasheet, SMCJ170-E3/57T pinout, SMCJ170-E3/57T application, or SMCJ170-E3/57T equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification, 150 °C junction temperature rating, RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity - all critical for high-reliability automotive and industrial PCB designs.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 170 V and rapidly transitions to low-impedance conduction above VBR (min 189 V), limiting transient energy to safe levels. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown behavior under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 standards for surge suppression and is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine). Thermal resistance is RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads), supporting operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines protected circuit's normal operating margin. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 275 V at 5.5 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against high-energy transients like load dump or inductive kick. |
| IFSM | 200 A - Single half-sine surge current rating (8.3 ms); validates survivability under automotive ISO 7637-2 Pulse 5a/b conditions. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive deployment without derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A108. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with molded UL 94 V-0 compound and matte tin-plated leads solderable per J-STD-002/JESD22-B102. Polarity indicated by cathode band; unidirectional configuration only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping loop when cathode is tied to protected line. |
| Cathode | Protected line interface | Connected to the rail or signal line requiring transient suppression; conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and life cycles. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics where failure modes must meet strict safety thresholds. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without pre-baking; eliminates moisture-related popcorning risk. |
| 1500 W peak pulse power | Provides headroom for high-energy transients common in 24 V/48 V vehicle systems and industrial PLC I/O modules. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or relay bounce), improving system-level immunity. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) and body control modules (BCMs) against load dump and jump-start surges. IC Role / Device Role: Primary clamping element placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤275 V, preventing damage to downstream DC-DC converters and microcontrollers rated for 300 V absolute maximum. |
Use Scenario: Safeguarding gate driver ICs and current sense amplifiers in variable-frequency drives exposed to inductive switching noise. IC Role / Device Role: Parallel-connected TVS on isolated gate drive supply rails and analog feedback paths. Use Value: Clamps sub-µs spikes from MOSFET/IGBT switching, preserving signal integrity and avoiding false triggering of protection circuits. |
| Telecom Power Interface | Renewable Energy Inverter Input |
|
Use Scenario: Shielding PoE-powered equipment front-ends from lightning-induced surges on Ethernet data lines and auxiliary DC inputs. IC Role / Device Role: Secondary-level TVS after primary gas discharge tube (GDT), providing fast-response clamping. Use Value: Responds within <1 ps to limit residual voltage to safe levels for IEEE 802.3af/at PHY transceivers and DC-DC controllers. |
Use Scenario: Protecting MPPT controller inputs in solar inverters subjected to grid-switching transients and nearby lightning strikes. IC Role / Device Role: Installed across PV string inputs upstream of boost converter stage. Use Value: Withstands repeated 1500 W pulses while maintaining VWM = 170 V compatibility with 1500 V-class photovoltaic arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/57T | Lower PPPM = 400 W; same VWM/VBR but higher VC = 275 V at 1.45 A; SMA package (smaller footprint, lower thermal mass). | Not suitable for automotive load dump; limited to low-energy signal-line protection in consumer or telecom gear. | Select only if board space is constrained and surge energy is ≤400 W; verify thermal derating on small pads. |
| SMCJ170AHE3/57T | Identical electrical specs and package; differs only in AEC-Q101 qualification status (HE3 suffix denotes automotive grade). | No functional difference; both qualified, but HE3 variant carries full automotive traceability documentation. | Choose SMCJ170AHE3/57T for Tier-1 automotive BOMs requiring full PPAP documentation and lot-level test reports. |
Compared with SMCJ170-E3/57T, SMAJ170A-E3/57T offers smaller size but insufficient energy handling for automotive use, while SMCJ170AHE3/57T provides identical performance with enhanced automotive compliance reporting - making it the preferred choice for safety-critical OEM programs.
Availability
SMCJ170-E3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power interfaces, and renewable energy inverters requiring stable component supply with consistent AEC-Q101 qualification and RoHS compliance.
Supply support for SMCJ170-E3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMCJ series targets high-energy transient suppression in harsh environments; engineered for automotive, industrial, and telecom applications where robustness against load dump, ESD, and inductive switching is mandatory.
FAQ
What is the polarity configuration of the SMCJ170-E3/57T?
The SMCJ170-E3/57T is a unidirectional TVS diode, with polarity marked by a cathode band on the DO-214AB package. It conducts only when the cathode is at a higher potential than the anode - essential for DC rail protection where reverse voltage blocking is required. This distinguishes it from bi-directional variants like SMCJ170CA, which lack polarity marking and conduct in both directions.
Does the SMCJ170-E3/57T meet automotive qualification standards?
Yes, the SMCJ170-E3/57T is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. Its qualification applies specifically to the E3 suffix variant as documented in Vishay's certification records, confirming suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of the SMCJ170-E3/57T under surge conditions?
The SMCJ170-E3/57T has a maximum clamping voltage (VC) of 275 V at 5.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Can the SMCJ170-E3/57T be used in bi-directional applications?
No, the SMCJ170-E3/57T is strictly unidirectional and must not be used in AC or bidirectional signal paths. For bi-directional protection, Vishay specifies the SMCJ170CA variant, which has symmetrical breakdown characteristics and no polarity marking. Using SMCJ170-E3/57T in such roles risks permanent conduction or failure due to reverse-bias breakdown.
What is the moisture sensitivity level (MSL) rating for the SMCJ170-E3/57T?
The SMCJ170-E3/57T is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows indefinite floor life at ambient conditions and compatibility with standard lead-free reflow profiles without baking - simplifying manufacturing for high-volume automotive and industrial PCB assembly.
SMCJ170-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170-E3/57T FAQ
1.How can I place an order for SMCJ170-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170-E3/57T 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 SMCJ170-E3/57T reliable?
The price and inventory of SMCJ170-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ170-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170-E3/57T?
SMCJ170-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170-E3/57T 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 SMCJ170-E3/57T?
For technical support, including SMCJ170-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170-E3/57T requirements.
6.How does Aetrix verify that SMCJ170-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ170-E3/57T 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 SMCJ170-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ170-E3/57T?
All SMCJ170-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170-E3/57T, 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 SMCJ170-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ170-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170-E3/57T Tags
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