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Vishay General Semiconductor - Diodes Division 1.5SMC12A-E3/57T
- Part No.:
- 1.5SMC12A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12A-E3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
1.5SMC12A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), clamps to ≤16.7 V at 89.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - ideal for safeguarding MOSFETs and ICs against lightning-induced transients in automotive power supplies.
For engineers reviewing the 1.5SMC12A-E3/57T datasheet, 1.5SMC12A-E3/57T pinout, 1.5SMC12A-E3/57T application, or 1.5SMC12A-E3/57T equivalent, key selection criteria include its unidirectional polarity, SMC (DO-214AB) package compatibility, low clamping ratio (VC/VBR ≈ 1.32), <5 µA reverse leakage at VWM, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
The 1.5SMC12A-E3/57T operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown and fast response (<1 ns). Its clamping behavior under 10/1000 µs surges is defined by a low incremental surge resistance, enabling predictable voltage limiting during ESD and inductive switching events.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C. The cathode band marking confirms polarity, and its matte tin-plated leads comply with J-STD-002 solderability standards and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamped voltage during 1500 W transient, ensuring downstream ICs stay below absolute max ratings |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, validated per Fig. 1 derating curves |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for input rectifier stage protection |
| TJ max | +150 °C - enables use in under-hood automotive environments and high-ambient industrial power supplies |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to system ground or low-side return path; reverse-biased during transient suppression |
| Cathode | Avalanche conduction terminal | Marked with band; connected to protected line (e.g., 12 V rail); conducts surge current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems |
| Low clamping voltage (VC/VBR ≈ 1.32) | Minimizes stress on downstream MOSFET gate oxides and logic-level inputs during clamping |
| Glass-passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring stress-tested reliability |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp spikes above 16.7 V within nanoseconds. Use Value: Prevents latch-up or permanent damage to MCU power domains and CAN transceivers without adding series impedance. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy from signal trace to ground, preserving signal integrity up to 1 MHz. Use Value: Maintains sub-10 pF junction capacitance (typ.) to avoid loading 4–20 mA loop filters or ADC front-ends. |
| Consumer DC-DC Converter Input Stage | Telecom PoE Interface Surge Suppression |
|
Use Scenario: Safeguarding buck converter ICs and high-side MOSFETs against input voltage overshoot from hot-plug events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VIN pin, activated before internal IC protection triggers. Use Value: Delivers 89.8 A peak pulse current capability to absorb 1500 W surges without degradation across >1000 cycles. |
Use Scenario: Secondary-level protection on Power over Ethernet (PoE) data pairs per IEEE 802.3af/at requirements. IC Role / Device Role / Timing Role: Bidirectional variant (e.g., 1.5SMC12CA) used on differential pairs; unidirectional 1.5SMC12A-E3/57T applied on DC bias rails. Use Value: Meets UL 497B recognition for protector classification, supporting certified telecom infrastructure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same VBR range (11.4–12.6 V) but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 90 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with smaller pads |
| 1.5KE12A | Through-hole TO-204AE (DO-201AE); identical electrical specs but larger size and manual assembly requirement | Used where legacy through-hole manufacturing or higher mechanical robustness is mandated | Choose for prototyping, repair, or high-vibration environments where SMT reliability is a concern |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12A-E3/57T offers optimal balance of 1500 W surge capacity, SMC's automated placement compatibility, and thermal performance - making it preferred for volume automotive and industrial SMT production where both energy handling and assembly efficiency matter.
Availability
1.5SMC12A-E3/57T is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, consumer DC-DC converters, and telecom PoE infrastructure requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC12A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 qualification readiness are essential.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC12A-E3/57T?
The 1.5SMC12A-E3/57T has a guaranteed breakdown voltage range of 11.4 V to 12.6 V at 1 mA test current, representing ±5% tolerance around the nominal 12 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage design margins in safety-critical 12 V systems.
Is the 1.5SMC12A-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC12A-E3/57T carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free versions, specify the "M3" suffix (e.g., 1.5SMC12A-M3/57T), which meets IEC 61249-2-21 requirements.
Does the 1.5SMC12A-E3/57T require a heatsink for 1500 W pulse handling?
No external heatsink is required for single-pulse 1500 W events, provided the PCB uses the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. The 1.5SMC12A-E3/57T relies on PCB copper mass for thermal dissipation during short-duration surges; continuous power dissipation remains limited to 6.5 W at 50 °C ambient.
Can the 1.5SMC12A-E3/57T be used in bidirectional signal protection?
No - the 1.5SMC12A-E3/57T is unidirectional only, with cathode band marking. For bidirectional protection (e.g., RS-485, USB D+/D−), use the 1.5SMC12CA variant, which provides symmetrical clamping in both polarities and no polarity marking. Substituting 1.5SMC12A-E3/57T in bidirectional circuits risks forward conduction and failure.
What is the maximum reverse leakage current of the 1.5SMC12A-E3/57T at its stand-off voltage?
At VWM = 10.2 V and TA = 25 °C, the 1.5SMC12A-E3/57T exhibits a maximum reverse leakage current (ID) of 5.0 µA. This low leakage ensures minimal standby power loss in always-on automotive modules and avoids false triggering in high-impedance sensor bias networks.
1.5SMC12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12A-E3/57T FAQ
1.How can I place an order for 1.5SMC12A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12A-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 1.5SMC12A-E3/57T reliable?
The price and inventory of 1.5SMC12A-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 1.5SMC12A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC12A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12A-E3/57T?
1.5SMC12A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12A-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 1.5SMC12A-E3/57T?
For technical support, including 1.5SMC12A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC12A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12A-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 1.5SMC12A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC12A-E3/57T?
All 1.5SMC12A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12A-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 1.5SMC12A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC12A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12A-E3/57T Tags
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