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Vishay General Semiconductor - Diodes Division 1.5SMC120AHE3_A/H
- Part No.:
- 1.5SMC120AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120AHE3_A/H.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,233
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Product details
Overview
1.5SMC120AHE3_A/H 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 standoff voltage (VWM), 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 I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC120AHE3_A/H datasheet, 1.5SMC120AHE3_A/H pinout, 1.5SMC120AHE3_A/H application, or 1.5SMC120AHE3_A/H equivalent, key selection criteria include clamping performance under repetitive surge stress, 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 device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its breakdown threshold (VBR = 114–126 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM = 102 V) and fast response (<1.0 ns), enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
Designed for surface-mount use in the SMC (DO-214AB) package, it delivers 1500 W peak pulse power with 0.01% duty cycle and supports operating junction temperatures from –65 °C to +150 °C. The cathode band marking identifies polarity, and its matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 165 V at IPPM = 9.1 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capability under standardized surge waveform; enables single-device protection for high-energy transients. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Minimal standby current; preserves system efficiency and avoids false triggering in low-power circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; informs PCB pad design (0.31″ × 0.31″ copper required for rated power). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by black band. Compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge (IFSM = 200 A). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 1500 W peak pulse power | Withstands high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across temperature and humidity; eliminates risk of junction corrosion. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients; improves protection margin for sensitive 3.3 V/5 V logic. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning; supports high-yield automated assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground; clamps transients within nanoseconds to prevent latch-up or gate oxide damage. Use Value: Maintains signal integrity during 12 V/24 V system load dump (ISO 16750-2) while supporting AEC-Q101 reliability requirements. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers against field-wiring surges and ground loop transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC supply rails and discrete I/O lines; absorbs repetitive 1 kV/500 A surges per IEC 61000-4-5. Use Value: Enables >100,000 surge cycles without parameter shift due to low incremental resistance and stable VBR drift (<0.107 %/°C). |
| DC Power Rail Protection | Telecom Line Interface |
Use Scenario: Secondary protection stage following fuse or PTC on 48 V telecom or industrial power distribution boards. IC Role / Device Role / Timing Role: Fast-acting shunt device that diverts surge current away from downstream DC-DC converters and PMICs. Use Value: Clamps 10/1000 µs surges to ≤165 V, preserving 50 V-rated input capacitors and MOSFET gate drivers. |
Use Scenario: Protecting Ethernet PHYs and PoE injectors from induced lightning surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to local ground; used in conjunction with common-mode chokes and gas discharge tubes. Use Value: Provides <1.0 ns response and <1.0 µA leakage at 102 V, minimizing impact on 100BASE-TX signal integrity and power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A-E3/57T | Same VWM (102 V) and VC (165 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or repeated industrial surges. | Select only for space-constrained consumer-grade designs where 1500 W rating is not required. |
| 1.5KE120A | Through-hole DO-201 package; identical electrical specs but incompatible with SMT assembly and automotive MSL requirements. | Requires wave soldering; not qualified to AEC-Q101; higher thermal resistance limits power derating. | Use only for legacy through-hole prototyping or non-automotive repair scenarios. |
Compared with SMAJ120A-E3/57T and 1.5KE120A, the 1.5SMC120AHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC package manufacturability - making it the sole choice for production automotive and industrial SMT designs requiring full compliance and high-energy resilience.
Availability
1.5SMC120AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, and 48 V DC power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC120AHE3_A/H 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, precision, and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge handling are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC120AHE3_A/H under maximum rated surge current?
The 1.5SMC120AHE3_A/H exhibits a maximum clamping voltage (VC) of 165 V when subjected to its rated peak pulse current (IPPM) of 9.1 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 surge events - critical for ensuring downstream components like microcontrollers or transceivers remain within absolute maximum ratings.
Is the 1.5SMC120AHE3_A/H qualified for automotive applications?
Yes, the 1.5SMC120AHE3_A/H is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - validating its suitability for under-hood and body-control module applications where reliability under thermal and vibration stress is essential.
What is the thermal resistance and recommended PCB layout for the 1.5SMC120AHE3_A/H?
The 1.5SMC120AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, achievable only when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal as specified in Figure 6 of the datasheet. Deviation from this layout increases thermal impedance, reducing safe operating power and accelerating parameter drift during repetitive surge events.
How does the 1.5SMC120AHE3_A/H differ from bidirectional variants like 1.5SMC120CA?
The 1.5SMC120AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, 1.5SMC120CA is bidirectional - symmetrical in both directions, used for AC or data-line protection - and lacks polarity marking. Their VWM, VBR, and VC values differ accordingly; mixing them risks improper clamping or forward conduction failure.
What is the maximum reverse leakage current of the 1.5SMC120AHE3_A/H at its standoff voltage?
The 1.5SMC120AHE3_A/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its standoff voltage (VWM) of 102 V, measured at TA = 25 °C. This ultra-low leakage preserves power efficiency in always-on systems and prevents false triggering in high-impedance sensing circuits - a key advantage over older TVS families with leakage in the tens of µA range.
1.5SMC120AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC120AHE3_A/H FAQ
1.How can I place an order for 1.5SMC120AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120AHE3_A/H 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 1.5SMC120AHE3_A/H reliable?
The price and inventory of 1.5SMC120AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC120AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120AHE3_A/H?
1.5SMC120AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120AHE3_A/H 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 1.5SMC120AHE3_A/H?
For technical support, including 1.5SMC120AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC120AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120AHE3_A/H 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 1.5SMC120AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC120AHE3_A/H?
All 1.5SMC120AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120AHE3_A/H, 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 1.5SMC120AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC120AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120AHE3_A/H Tags
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