My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC51CA-E3/57T
- Part No.:
- 1.5SMC51CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CA-E3/57T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC51CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount 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), 43.6 V stand-off voltage (VWM), clamps to ≤70.1 V at 21.4 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC51CA-E3/57T datasheet, 1.5SMC51CA-E3/57T pinout, 1.5SMC51CA-E3/57T application, or 1.5SMC51CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B surge protector standards.
Technical Context
The 1.5SMC51CA-E3/57T operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±70.1 V while maintaining <1 µA leakage at 43.6 V. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for suppressing ESD and lightning-induced surges on unshielded lines.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it supports repetitive 0.01% duty cycle pulses and derates linearly above TA = 25 °C per Fig. 2. Junction temperature range spans –65 °C to +150 °C, with MSL Level 1 rating and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines reliable conduction onset in both directions under standardized test conditions |
| VWM | 43.6 V - maximum continuous reverse voltage before significant leakage; ensures no false triggering during normal operation |
| VC @ IPPM | ≤70.1 V at 21.4 A - clamping voltage limits downstream IC stress during 10/1000 µs transients |
| PPPM | 1500 W - peak pulse power handling capacity determines survivability against high-energy surges like ISO 7637-2 Pulse 5a |
| IPPM | 21.4 A - peak pulse current rating directly maps to surge immunity level for given line impedance |
| TJ max | +150 °C - enables use in under-hood automotive environments without thermal shutdown |
| RθJA | 75 °C/W - quantifies self-heating under sustained power dissipation; informs PCB copper pad sizing requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity of surge - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe automotive load dump and lightning-induced surges without failure |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial surge protection systems requiring third-party safety certification |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 coupled transients and ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or between signal and ground to clamp surges before reaching MCU or signal conditioner. Use Value: Prevents latch-up or permanent damage to 5 V tolerant receivers by limiting transient voltage to ≤70.1 V at 21.4 A. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive switching noise and field wiring faults. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from relay coil flyback and cable coupling events on dry-contact inputs. Use Value: Maintains system uptime by preventing false triggering or input stage destruction during 1500 W surge events. |
| Telecom Line Interface Protection | Consumer Appliance Power Supply Surge Clamping |
Use Scenario: Shielding Ethernet PHY magnetics or RS-485 transceivers from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on line side of isolation barrier, working with GDT or secondary-stage MOVs in coordinated protection scheme. Use Value: Limits let-through voltage to <70.1 V, preserving integrity of isolated data interface components rated for 100 VDC isolation. |
Use Scenario: Clamping AC line surges on primary-side rectifier outputs or DC bus rails in white goods motor drives and SMPS. IC Role / Device Role / Timing Role: Fast-acting shunt device diverting surge current away from bulk capacitors and switching MOSFETs during line transients. Use Value: Extends capacitor lifetime and prevents MOSFET avalanche failure by clamping 10/1000 µs surges within safe SOA limits. |
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 PPPM (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Less suitable for high-energy automotive load dump; better for space-constrained consumer electronics | Select when board area is limited and surge threat level is moderate (e.g., IEC 61000-4-5 Level 3) |
| 1.5KE51CA | Through-hole DO-201 package, identical electrical specs but slower thermal response and manual assembly requirement | Used where legacy through-hole manufacturing or higher mechanical robustness is prioritized over SMT automation | Choose for prototyping, repair, or high-vibration environments where solder joint reliability outweighs assembly efficiency |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CA-E3/57T offers optimal balance of 1500 W surge handling, SMC package manufacturability, and AEC-Q101 readiness - making it preferred for volume automotive and industrial SMT production where both performance and process scalability matter.
Availability
1.5SMC51CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and appliance power supplies requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC51CA-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-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and UL recognition.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC51CA-E3/57T?
The 1.5SMC51CA-E3/57T has a specified breakdown voltage range of 48.5 V to 53.6 V at 1 mA test current, representing a ±5.2% tolerance around the nominal 51 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in protected circuits.
Is the 1.5SMC51CA-E3/57T AEC-Q101 qualified?
The 1.5SMC51CA-E3/57T is not AEC-Q101 qualified; only variants with HE3 or HM3 suffixes (e.g., 1.5SMC51CAHE3_A) carry AEC-Q101 qualification. The -E3/57T version is RoHS-compliant commercial-grade, rated for industrial and consumer applications but not certified for automotive under-hood use per AEC-Q101 stress testing requirements.
What is the maximum clamping voltage of the 1.5SMC51CA-E3/57T at its rated peak pulse current?
The 1.5SMC51CA-E3/57T clamps to a maximum of 70.1 V at its rated peak pulse current of 21.4 A (10/1000 µs waveform). This value is guaranteed across temperature and lot variations, and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does the 1.5SMC51CA-E3/57T require orientation during PCB placement?
No - the 1.5SMC51CA-E3/57T is a bidirectional TVS diode with symmetrical terminals and no polarity marking. Either end may connect to line or ground; orientation is irrelevant during automated placement or manual assembly, simplifying layout and reducing assembly errors.
What is the thermal resistance junction-to-ambient for the 1.5SMC51CA-E3/57T under standard mounting conditions?
The 1.5SMC51CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes FR-4 PCB with no internal planes; actual RθJA improves with additional copper area or thermal vias.
1.5SMC51CA-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:
- -
- 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-E3/57T FAQ
1.How can I place an order for 1.5SMC51CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CA-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 1.5SMC51CA-E3/57T reliable?
The price and inventory of 1.5SMC51CA-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 1.5SMC51CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CA-E3/57T?
1.5SMC51CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CA-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 1.5SMC51CA-E3/57T?
For technical support, including 1.5SMC51CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC51CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CA-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 1.5SMC51CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CA-E3/57T?
All 1.5SMC51CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CA-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 1.5SMC51CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC51CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CA-E3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
