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Vishay General Semiconductor - Diodes Division 1.5SMC170AHE3/57T
- Part No.:
- 1.5SMC170AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170AHE3/57T.pdf
- Description:
- TVS DIODE 145VWM 234VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,529
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Product details
Overview
1.5SMC170AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 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 - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5SMC170AHE3/57T datasheet, 1.5SMC170AHE3/57T pinout, 1.5SMC170AHE3/57T application, or 1.5SMC170AHE3/57T equivalent, key selection criteria include clamping performance under 10/1000 µs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (162–179 V), it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM).
Designed for repetitive 10/1000 µs surges at 0.01% duty cycle, it delivers 234 V clamping at 6.4 A IPPM while maintaining <0.11 %/°C temperature coefficient of VBR - critical for stable protection across -65 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - maximum continuous reverse working voltage before conduction begins; defines safe DC operating margin. |
| VBR (Breakdown Voltage) | 162–179 V at 1 mA - precise avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 234 V at 6.4 A IPPM - maximum voltage seen by protected circuit during full-rated surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W with 10/1000 µs waveform - energy-handling capacity for lightning and inductive-switching transients. |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; requires minimum 8.0 mm × 8.0 mm copper pad per terminal for rated power dissipation. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., GND or return path); defines directionality in unidirectional configuration. |
| Cathode | Reverse voltage sensing / Surge current sink | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when mounted on specified 8 mm × 8 mm pads. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or special handling. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time). |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs in automotive ECUs against load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and DC-DC converter input. Use Value: Clamps transients to ≤234 V, preventing damage to upstream regulators and ensuring system reset integrity. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) of industrial pressure/temperature sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, preserving signal fidelity up to 1 MHz. Use Value: Limits induced voltage to safe levels without distorting low-current analog signals due to minimal leakage (<1 µA). |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from surges on 48 V DC input derived from PSE switches. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before isolation and regulation stages. Use Value: Withstands repeated 10/1000 µs surges per IEC 61000-4-5, enabling compliance with EN 61000-6-2 immunity requirements. |
Use Scenario: Shielding microcontroller I/O and gate drivers in washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Fast-response TVS on half-bridge driver supply rails to suppress MOSFET switching noise. Use Value: Sub-1 ns response time prevents latch-up in logic-level drivers during high-dI/dt events. |
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-E3/52 | Lower PPPM (600 W), same VWM (145 V), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer designs where surge energy is limited to IEC 61000-4-2 contact discharge only. | Select when board area is critical and peak surge energy does not exceed 600 W. |
| 1.5KE170A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Applicable in non-automotive industrial controls where reflow compatibility and automotive qualification are not required. | Choose for legacy through-hole assembly or cost-sensitive non-automotive production. |
Compared with 1.5SMC170AHE3/57T, SMBJ170A-E3/52 trades surge robustness for compactness, while 1.5KE170A sacrifices SMT process compatibility and automotive reliability for simpler manufacturing - making 1.5SMC170AHE3/57T the optimal choice for AEC-Q101-compliant, high-power SMT designs.
Availability
1.5SMC170AHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC170AHE3/57T 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 developed for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC170AHE3/57T under full-rated surge current?
The 1.5SMC170AHE3/57T exhibits a maximum clamping voltage (VC) of 234 V when subjected to its rated peak pulse current (IPPM) of 6.4 A with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 1.5SMC170AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC170AHE3/57T qualified for automotive applications?
Yes, the 1.5SMC170AHE3/57T carries the HE3 suffix, indicating RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22 standards - confirming suitability for under-hood and body electronics applications. The 1.5SMC170AHE3/57T is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the 1.5SMC family.
What is the recommended PCB layout for optimal thermal performance of the 1.5SMC170AHE3/57T?
Vishay specifies that the 1.5SMC170AHE3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve its rated 1500 W peak pulse power and 6.5 W steady-state power dissipation. These pads provide adequate thermal mass and conduction path to maintain junction temperature within limits during repetitive surges. The 1.5SMC170AHE3/57T datasheet (Fig. 2) confirms derating curves assume this pad layout.
Does the 1.5SMC170AHE3/57T have bidirectional capability?
No, the 1.5SMC170AHE3/57T is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. It conducts only in reverse bias (cathode positive) and blocks forward current like a standard rectifier. For bidirectional protection, Vishay offers the 1.5SMC170CAHE3/57T variant - the 1.5SMC170AHE3/57T must be oriented correctly in-circuit with the cathode band toward the protected line.
What is the maximum junction temperature rating for the 1.5SMC170AHE3/57T?
The 1.5SMC170AHE3/57T has a maximum operating junction temperature (TJ max.) of +150 °C, as specified in the Absolute Maximum Ratings table of Vishay document 88303. This rating enables reliable operation in under-hood automotive environments and enclosed industrial enclosures. Derating of peak pulse power begins above TA = 25 °C per Figure 2, and the 1.5SMC170AHE3/57T remains functional up to the full TJ limit without parametric shift.
1.5SMC170AHE3/57T 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC170AHE3/57T FAQ
1.How can I place an order for 1.5SMC170AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170AHE3/57T 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 1.5SMC170AHE3/57T reliable?
The price and inventory of 1.5SMC170AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC170AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170AHE3/57T?
1.5SMC170AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170AHE3/57T 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 1.5SMC170AHE3/57T?
For technical support, including 1.5SMC170AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC170AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170AHE3/57T 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 1.5SMC170AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC170AHE3/57T?
All 1.5SMC170AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170AHE3/57T, 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 1.5SMC170AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC170AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170AHE3/57T Tags
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