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Vishay General Semiconductor - Diodes Division 1.5SMC170A-E3/57T
- Part No.:
- 1.5SMC170A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170A-E3/57T.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
1.5SMC170A-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 170 V standoff voltage (VWM), 194.5 V minimum breakdown voltage (VBR), 234 V maximum clamping voltage (VC) at 6.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive power supplies and industrial sensor interfaces.
For engineers reviewing the 1.5SMC170A-E3/57T datasheet, 1.5SMC170A-E3/57T pinout, 1.5SMC170A-E3/57T application, or 1.5SMC170A-E3/57T equivalent, key selection criteria include clamping performance under 10/1000 μs transients, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, RoHS-compliant SMC (DO-214AB) packaging, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The 1.5SMC170A-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering fast response to ESD and lightning-induced transients. Its unidirectional configuration uses cathode-band polarity marking and exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.21) at rated IPPM.
Thermally, it is rated for TJ = –65 °C to +150 °C operation and derates linearly above TA = 25 °C per Figure 2; mounted on 8.0 mm × 8.0 mm copper pads, it achieves 6.5 W steady-state power dissipation at TA = 50 °C and withstands 200 A non-repetitive forward surge (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 145 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min) | 162 V at IT = 1 mA - guaranteed avalanche onset threshold under standardized test current |
| VC (max) | 234 V at IPPM = 6.4 A - peak clamped voltage during 10/1000 μs transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability defines transient energy absorption capacity |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance determines safe power derating on standard PCB layout |
| TJ max | +150 °C - maximum junction temperature enabling reliable operation in under-hood automotive environments |
| ID (max) | 1 μA at VWM - ultra-low leakage preserves efficiency in high-impedance bias networks |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound. Cathode identified by black band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 12 V rail or CAN_H) to shunt overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without cascaded stages |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| Low clamping ratio (VC/VBR ≈ 1.21) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in MOSFETs/ICs |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without halogen-free cost premium (M3 variant available) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility without baking preconditioning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-supplied ECUs exposed to load-dump transients (ISO 7637-2 Pulse 5a, up to 60 V/100 ms) and alternator ripple. IC Role / Device Role: Primary clamping device placed between battery input and DC-DC converter input stage. Use Value: Clamps transients to ≤234 V while absorbing 1500 W peak energy, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to induced surges from nearby motor switching. IC Role / Device Role: Unidirectional TVS across sensor output terminals to divert common-mode transients to local ground. Use Value: Limits voltage excursion to <234 V during 10/1000 μs events, preserving analog front-end integrity and avoiding ADC saturation. |
| Telecom DC Power Feeding | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: PoE-powered network equipment where DC feed lines (e.g., 48 V) require surge immunity per IEC 61000-4-5. IC Role / Device Role: Standoff-rated TVS on PSE-side DC input to protect Ethernet controller and magnetics. Use Value: Withstands repeated 1500 W pulses at 0.01% duty cycle, maintaining long-term reliability without parameter shift. |
Use Scenario: BLDC motor control boards in washing machines, exposed to back-EMF spikes during commutation. IC Role / Device Role: Unidirectional suppressor across H-bridge high-side FET source-drain or supply rail. Use Value: Fast avalanche response (<1 ns) clamps inductive kickback before MOSFET avalanche failure, extending drive-stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | Same VWM (145 V) and VC (234 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (IEC 61000-4-2 contact discharge only); unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with RθJA derating. |
| 1.5KE170A | Same electrical specs (VWM, VBR, VC), but axial-leaded DO-201AE package; no SMD compatibility | Requires through-hole assembly; incompatible with automated SMT lines; higher mounting inductance reduces high-frequency surge response | Choose only for legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency. |
Compared with SMBJ170A and 1.5KE170A, the 1.5SMC170A-E3/57T delivers full 1500 W surge handling in an SMD package optimized for automated placement, thermal performance (RθJA = 75 °C/W), and automotive-grade reliability - making it the preferred choice for volume production of ruggedized power electronics.
Availability
1.5SMC170A-E3/57T is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, telecom DC feeding circuits, and consumer appliance motor drives requiring stable component supply and consistent surge performance across production batches.
Supply support for 1.5SMC170A-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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness against lightning, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the 1.5SMC170A-E3/57T under a 10/1000 μs transient?
The 1.5SMC170A-E3/57T has a maximum clamping voltage (VC) of 234 V at a peak pulse current (IPPM) of 6.4 A with a 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the 1.5SMC170A-E3/57T RoHS-compliant and halogen-free?
The 1.5SMC170A-E3/57T carries the "E3" suffix, indicating RoHS-compliance per EU Directive 2011/65/EU and Vishay's material declaration Doc. 99912. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC170A-M3/57T) must be selected.
Does the 1.5SMC170A-E3/57T meet AEC-Q101 for automotive use?
The base 1.5SMC170A-E3/57T is commercial-grade and not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under the "HE3" suffix (e.g., 1.5SMC170AHE3_A/H), which share identical electrical specs but undergo additional stress testing per AEC-Q101 Rev D.
What is the thermal resistance of the 1.5SMC170A-E3/57T, and how does it affect PCB layout?
The 1.5SMC170A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe operation at 6.5 W steady-state dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks near the SMC (DO-214AB) body.
How is polarity identified on the 1.5SMC170A-E3/57T?
The 1.5SMC170A-E3/57T is unidirectional and marked with a cathode band (black stripe) on the SMC package body. The banded end is the cathode and must be connected to the line being protected; the opposite end is the anode, typically tied to ground or the lower-potential reference.
1.5SMC170A-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC170A-E3/57T FAQ
1.How can I place an order for 1.5SMC170A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170A-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 1.5SMC170A-E3/57T reliable?
The price and inventory of 1.5SMC170A-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 1.5SMC170A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC170A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170A-E3/57T?
1.5SMC170A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170A-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 1.5SMC170A-E3/57T?
For technical support, including 1.5SMC170A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC170A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170A-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 1.5SMC170A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC170A-E3/57T?
All 1.5SMC170A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170A-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 1.5SMC170A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC170A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170A-E3/57T Tags
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