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Vishay General Semiconductor - Diodes Division 1.5SMC51CA-M3/57T
- Part No.:
- 1.5SMC51CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CA-M3/57T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,409
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Product details
Overview
1.5SMC51CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 70.1 V at 21.4 A, and SMC (DO-214AB) surface-mount package - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC51CA-M3/57T datasheet, 1.5SMC51CA-M3/57T pinout, 1.5SMC51CA-M3/57T application, or 1.5SMC51CA-M3/57T equivalent, key selection considerations include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.42), MSL Level 1 reflow compatibility, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VWM, and VC specifications for forward and reverse directions. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
The device delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W. It supports operating junction temperatures from –65 °C to +150 °C and meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines reliable avalanche initiation threshold in both directions |
| VWM | 43.6 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V at 21.4 A - clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, critical for lightning surge immunity |
| IFSM | Not applicable - bidirectional device has no defined forward surge rating |
| TJ range | –65 °C to +150 °C - enables deployment in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin SMT outline, 7.75 mm × 6.22 mm footprint, compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts avalanche current in either direction when |V| > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage performance in both polarities - eliminates need for orientation-aware layout |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events on 2 Ω source impedance without failure |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over temperature and lifetime - critical for automotive reliability |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and EU RoHS Directive 2011/65/EU Annex II |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
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 jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±100 V transients within 1 ns, preserving signal integrity for downstream ASICs. Use Value: Prevents latch-up or gate oxide damage in 5 V/3.3 V interface ICs by limiting voltage to ≤70.1 V during 21.4 A surges. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring faults and inductive kickback from solenoids/relays. IC Role / Device Role / Timing Role: Primary front-end surge limiter on dry-contact or PNP/NPN input channels, coordinated with series current-limiting resistors. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards up to 2 kV/1 kA. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-level protection on Ethernet PHY ports, RS-485 transceivers, or DSL line drivers exposed to induced lightning surges. IC Role / Device Role / Timing Role: Fast-acting shunt element that diverts surge energy away from sensitive transceiver ESD structures before internal clamps activate. Use Value: Reduces required PCB area vs. multi-stage protection while maintaining <100 ps response and sub-75 V clamping at 10 A. |
Use Scenario: Input-stage transient suppression in AC-DC adapters and USB-C PD chargers subjected to mains-borne surges and hot-plug events. IC Role / Device Role / Timing Role: Standalone or cascaded TVS across bulk capacitor input, absorbing residual transients after MOV primary stage. Use Value: Extends capacitor lifetime by limiting voltage overshoot to ≤70.1 V during 1500 W pulses, avoiding dielectric stress beyond rated WV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower peak power (600 W), same VBR (48.5–53.6 V), SMB package (smaller footprint, higher RθJA) | Preferred for space-constrained consumer electronics where 600 W surge margin suffices | Select SMBJ51CA only if system-level surge testing confirms 600 W capability is adequate and thermal derating is acceptable |
| 1.5KE51CA | Higher peak power (1500 W), through-hole DO-201AE package, longer lead inductance (~15 nH vs. ~5 nH for SMC) | Suitable for legacy board designs or high-reliability test fixtures requiring manual assembly or socketing | Choose 1.5KE51CA when SMT process constraints prevent SMC use or when higher mechanical robustness is prioritized over layout density |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CA-M3/57T offers optimal balance of high-power surge handling, compact SMT form factor, and automotive-grade process control - making it preferred for new industrial and automotive designs requiring AEC-Q101-ready variants.
Availability
1.5SMC51CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow support.
Supply support for 1.5SMC51CA-M3/57T 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and long-term stability under thermal cycling are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC51CA-M3/57T?
The "CA" suffix in 1.5SMC51CA-M3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical breakdown, clamping, and leakage characteristics for positive and negative transients. This eliminates orientation dependency during PCB placement and simplifies design for AC-coupled or differential signal lines.
Is 1.5SMC51CA-M3/57T AEC-Q101 qualified?
The 1.5SMC51CA-M3/57T itself is not AEC-Q101 qualified; however, Vishay offers the AEC-Q101-qualified variant 1.5SMC51CAHM3_B/57T (with HM3 suffix and revision "B"). The M3 suffix indicates halogen-free and RoHS compliance, but automotive qualification requires explicit HM3_B or HM3_A coding per the ordering table in the datasheet.
What is the clamping voltage of 1.5SMC51CA-M3/57T at its rated peak pulse current?
The clamping voltage (VC) of 1.5SMC51CA-M3/57T is 70.1 V measured at its peak pulse current (IPPM) of 21.4 A under the standard 10/1000 µs waveform. This value is guaranteed per the datasheet's Electrical Characteristics table and reflects the maximum voltage seen by protected circuitry during worst-case surge events.
Can 1.5SMC51CA-M3/57T be used in place of a unidirectional TVS like 1.5SMC51A-M3/57T?
No - 1.5SMC51CA-M3/57T is bidirectional and lacks polarity marking, while 1.5SMC51A-M3/57T is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating references; unidirectional is required where DC bias or asymmetric grounding exists. Clamping behavior and leakage differ under forward bias.
What is the maximum operating temperature for 1.5SMC51CA-M3/57T?
The maximum operating junction temperature (TJ) for 1.5SMC51CA-M3/57T is +150 °C, with storage temperature ranging from –65 °C to +150 °C. This rating enables reliable operation in under-hood automotive environments and high-temperature industrial enclosures, provided PCB copper pad layout follows the recommended 8.0 mm × 8.0 mm thermal relief per terminal.
1.5SMC51CA-M3/57T 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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)
1.5SMC51CA-M3/57T FAQ
1.How can I place an order for 1.5SMC51CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CA-M3/57T 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 1.5SMC51CA-M3/57T reliable?
The price and inventory of 1.5SMC51CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC51CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CA-M3/57T?
1.5SMC51CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CA-M3/57T 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 1.5SMC51CA-M3/57T?
For technical support, including 1.5SMC51CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC51CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CA-M3/57T 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 1.5SMC51CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CA-M3/57T?
All 1.5SMC51CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CA-M3/57T, 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 1.5SMC51CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC51CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CA-M3/57T Tags
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