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Vishay General Semiconductor - Diodes Division 1.5SMC120A-E3/9AT
- Part No.:
- 1.5SMC120A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120A-E3/9AT.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,927
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Product details
Overview
1.5SMC120A-E3/9AT 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 120 V breakdown voltage (VBR = 114–126 V at IT = 1.0 mA), 165 V maximum clamping voltage (VC) at 9.1 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial motor drives, and telecom line protection.
For engineers reviewing the 1.5SMC120A-E3/9AT datasheet, 1.5SMC120A-E3/9AT pinout, 1.5SMC120A-E3/9AT application, or 1.5SMC120A-E3/9AT equivalent, key selection considerations include its unidirectional polarity, SMC (DO-214AB) surface-mount package, 102 V stand-off voltage (VWM), <1.0 µA reverse leakage at VWM, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, limiting transient energy to safe levels for downstream ICs and MOSFETs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repetitive transients.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = +150 °C. The cathode-band-marked SMC package allows automated placement and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V / 126 V at 1.0 mA test current - defines precise avalanche onset range for predictable clamping initiation |
| VWM | 102 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 165 V at 9.1 A - clamping voltage under 1500 W 10/1000 µs surge, directly limiting stress on protected circuitry |
| IPPM | 9.1 A - peak pulse current capability under standard waveform, determining minimum trace width and PCB copper requirements |
| PPPM | 1500 W - peak pulse power handling capacity, validating suitability for lightning-induced surges per IEC 61000-4-5 |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +150 °C - junction temperature limit enabling use in under-hood automotive and industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 molding compound. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line ground or low-side reference; forms clamping loop with cathode during transients |
| Cathode | Avalanche conduction terminal / Surge sink node | Marked with band; ties to supply rail or signal line being protected - determines unidirectional clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 Level 4 (4 kV) surge immunity testing for industrial and automotive systems |
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination risk |
| AEC-Q101 qualification path | Supports automotive-grade sourcing via HE3/HM3 variants - critical for ADAS sensor modules and body control units |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive logic |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect position sensors from load-dump and inductive switching transients in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor signal line and chassis ground, absorbing negative-going spikes while blocking normal DC bias. Use Value: Limits clamped voltage to ≤165 V, preventing gate oxide rupture in 3.3 V/5 V interface ICs and ensuring ASIL-B functional safety compliance. |
Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay coils, contactors, and solenoids in PLC I/O modules. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 102 V) installed across inductive load terminals to clamp flyback energy before it propagates into control logic. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling direct placement adjacent to 24 V/48 V relay drivers without derating. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Secondary-level surge suppression on Ethernet PHY differential pairs and RS-485 data lines exposed to field wiring in building automation systems. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (anode-to-ground, cathode-to-line) providing asymmetric clamping aligned with common-mode transient directionality. Use Value: Achieves <1.0 µA leakage at 102 V, preserving signal integrity and minimizing insertion loss in 100 Ω differential channels. |
Use Scenario: Front-end overvoltage protection for 110/230 VAC-derived 12 V DC supplies feeding industrial HMIs and edge controllers. IC Role / Device Role / Timing Role: Primary clamping element after bridge rectifier and bulk capacitor, shunting line-to-ground surges before they reach switching regulator ICs. Use Value: 1500 W rating handles 6 kV/3 kA combination wave surges per IEC 61000-4-5, reducing need for upstream MOV staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Same VBR range (114–126 V), but lower PPPM = 600 W and smaller SMB (DO-214AA) package | Limited to lower-energy transients (e.g., ESD-only); unsuitable for lightning-level surges in outdoor telecom gear | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±15 kV contact discharge only |
| 1.5KE120A | Through-hole TO-204AE (DO-41) package, identical electrical specs but no RoHS/E3 compliance or MSL Level 1 rating | Not compatible with automated SMT assembly; requires wave soldering and manual inspection | Choose only for legacy repair or prototyping where SMT infrastructure is unavailable |
Compared with SMBJ120A and 1.5KE120A, the 1.5SMC120A-E3/9AT delivers full 1500 W surge handling in an RoHS-compliant, MSL Level 1 SMT package - making it the only option qualified for high-volume automotive and industrial production requiring both performance and process compatibility.
Availability
1.5SMC120A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drive interfaces, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC120A-E3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC120A-E3/9AT under a 10/1000 µs surge?
The 1.5SMC120A-E3/9AT clamps to a maximum of 165 V when subjected to its rated 9.1 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, and directly determines the maximum voltage stress imposed on downstream components during surge events. The 1.5SMC120A-E3/9AT achieves this with low incremental resistance, minimizing overshoot beyond the specified VC.
Is the 1.5SMC120A-E3/9AT RoHS-compliant and lead-free?
Yes, the "E3" suffix in 1.5SMC120A-E3/9AT explicitly denotes Vishay's RoHS-compliant, commercial-grade variant with matte tin-plated leads and halogen-free molding compound. It satisfies JEDEC J-STD-020 MSL Level 1 and passes JESD 201 Class 2 whisker testing. The 1.5SMC120A-E3/9AT is fully compatible with lead-free reflow profiles up to 260 °C peak temperature.
Does the 1.5SMC120A-E3/9AT have AEC-Q101 qualification?
The base 1.5SMC120A-E3/9AT is not AEC-Q101 qualified; however, Vishay offers functionally identical variants with HE3 (RoHS + AEC-Q101) and HM3 (halogen-free + RoHS + AEC-Q101) suffixes. These automotive-grade versions share the same electrical characteristics and SMC package as the 1.5SMC120A-E3/9AT but undergo additional stress testing per AEC-Q101. For automotive designs, specify 1.5SMC120AHE3_X or 1.5SMC120AHM3_X.
What is the standoff voltage (VWM) of the 1.5SMC120A-E3/9AT, and why does it matter?
The 1.5SMC120A-E3/9AT has a maximum reverse stand-off voltage (VWM) of 102 V - the highest DC or RMS voltage it can block continuously without entering avalanche conduction. This parameter ensures the 1.5SMC120A-E3/9AT remains non-conductive during normal operation in 90–100 V systems (e.g., 24 V industrial buses with ripple), avoiding leakage-related power loss or false triggering while retaining full surge response capability.
How does the 1.5SMC120A-E3/9AT compare to bidirectional TVS diodes like 1.5SMC120CA?
The 1.5SMC120A-E3/9AT is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC120CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The 1.5SMC120A-E3/9AT offers lower leakage (<1.0 µA vs. ≤5.0 µA for CA) and is preferred for DC-biased lines (e.g., power rails, single-ended signals). Use the 1.5SMC120A-E3/9AT when protecting circuits with defined ground reference and directional transients.
1.5SMC120A-E3/9AT 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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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)
1.5SMC120A-E3/9AT FAQ
1.How can I place an order for 1.5SMC120A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120A-E3/9AT 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 1.5SMC120A-E3/9AT reliable?
The price and inventory of 1.5SMC120A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC120A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120A-E3/9AT?
1.5SMC120A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120A-E3/9AT 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 1.5SMC120A-E3/9AT?
For technical support, including 1.5SMC120A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC120A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120A-E3/9AT 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 1.5SMC120A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC120A-E3/9AT?
All 1.5SMC120A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120A-E3/9AT, 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 1.5SMC120A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC120A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120A-E3/9AT Tags
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