My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC51A-E3/57T
- Part No.:
- 1.5SMC51A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51A-E3/57T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,767
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC51A-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 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), 70.1 V maximum clamping voltage (VC) at 21.4 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 1.5SMC51A-E3/57T datasheet, 1.5SMC51A-E3/57T pinout, 1.5SMC51A-E3/57T application, or 1.5SMC51A-E3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, clamping performance under surge conditions, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5SMC51A-E3/57T operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (48.5–53.6 V), then clamping transient energy to ≤70.1 V at 21.4 A. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, on 8 mm × 8 mm copper pads) and RθJL = 15 °C/W (junction-to-leads), enabling reliable operation up to TJ = 150 °C. The device sustains non-repetitive 200 A forward surge (8.3 ms half-sine) and exhibits a +0.102 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise avalanche onset threshold for repeatable clamping initiation |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V at 21.4 A - clamped voltage during 1500 W 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capability per standard 10/1000 µs waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), critical for inductive load switching events |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 0.305" × 0.320" footprint, optimized for automated placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional configuration; carries surge current into device during clamping |
| Cathode | Avalanche breakdown terminal | Marked with band; connected to higher-potential line; controls reverse-biased clamping behavior and VBR specification |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against high-energy transients like ISO 7637-2 Pulse 5a (load dump) without external series impedance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, lightning-induced surges), improving system immunity |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special handling requirements |
| AEC-Q101 qualified option | Available as 1.5SMC51AHE3_A variant - validated for automotive electronics per stress test requirements |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity cycling |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping reverse transients before they reach sensitive input pins. Use Value: Limits voltage to ≤70.1 V during 1500 W surges, preventing latch-up or gate oxide damage in automotive-grade microcontrollers and transceivers. |
Use Scenario: Shields 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point, absorbing repetitive 10/1000 µs transients from inductive loads. Use Value: Maintains 43.6 V working voltage margin while clamping to 70.1 V, preserving input logic thresholds and enabling >100,000 surge cycles per IEC 61000-4-5. |
| DC Power Rail Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Installed on 48 V telecom power distribution boards to suppress lightning-induced surges entering via external ports. IC Role / Device Role / Timing Role: Primary unidirectional clamp on positive rail, coordinated with upstream fuses and secondary filtering. Use Value: Delivers 1500 W pulse handling with <1 ns response time, reducing downstream MOV or polymer PTC reliance and minimizing board space. |
Use Scenario: Safeguards RS-485/RS-232 transceivers in base station backhaul equipment exposed to induced surges on long cable runs. IC Role / Device Role / Timing Role: Point-of-entry TVS on differential pair, referenced to local ground with controlled trace impedance. Use Value: Clamps common-mode transients to 70.1 V while maintaining <1 µA leakage at 43.6 V, avoiding false triggering or bias shift in high-impedance receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Same VBR range (48.5–53.6 V) but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5KE51A | Through-hole DO-201 package; identical VBR/VC specs but higher RθJA (≈100 °C/W) and no AEC-Q101 option | Not suitable for automated SMT lines; requires wave solder or hand assembly; lacks automotive qualification | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with 1.5SMC51A-E3/57T, SMBJ51A trades 60% peak power for 40% smaller PCB area, while 1.5KE51A retains identical electrical specs but sacrifices SMT scalability and automotive compliance - making 1.5SMC51A-E3/57T the optimal balance of surge robustness, manufacturability, and qualification for production-grade embedded systems.
Availability
1.5SMC51A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and 48 V telecom power rail surge suppression requiring stable component supply, full RoHS compliance, and J-STD-002 solderability assurance.
Supply support for 1.5SMC51A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered for high-power surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and 1500 W surge resilience are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC51A-E3/57T under a 10/1000 µs surge?
The 1.5SMC51A-E3/57T clamps to a maximum of 70.1 V when subjected to its rated peak pulse current of 21.4 A, as defined by the 10/1000 µs waveform per IEC 61000-4-5. This value is measured at TA = 25 °C on standard 8 mm × 8 mm copper pads and represents the upper limit of voltage seen by protected circuitry during surge events.
Is the 1.5SMC51A-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC51A-E3/57T carries the "E3" suffix, indicating it is RoHS-compliant per EU Directive 2011/65/EU and meets Vishay's commercial-grade material specifications. It is not halogen-free; for halogen-free compliance, the "M3" variant (e.g., 1.5SMC51A-M3/57T) must be selected.
Does the 1.5SMC51A-E3/57T meet AEC-Q101 requirements?
The base 1.5SMC51A-E3/57T is not AEC-Q101 qualified. However, the functionally identical 1.5SMC51AHE3_A variant - distinguished by the "HE3" suffix and revision code "A" - is fully AEC-Q101 qualified for automotive applications and shares the same electrical characteristics and SMC package.
What is the maximum operating temperature for the 1.5SMC51A-E3/57T?
The 1.5SMC51A-E3/57T has a maximum junction temperature (TJ) of +150 °C and an operating ambient temperature range of –65 °C to +150 °C. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in the datasheet, with 50% power capability retained at TA ≈ 100 °C on recommended pad layout.
How does the 1.5SMC51A-E3/57T differ from bidirectional variants like 1.5SMC51CA?
The 1.5SMC51A-E3/57T is unidirectional, with polarity marked by a cathode band and specified VBR/VC only for reverse bias; forward conduction follows standard diode behavior. In contrast, 1.5SMC51CA is bidirectional, offering symmetric clamping in both directions with no polarity marking and identical VBR in either polarity - suited for AC-coupled or differential signal lines.
1.5SMC51A-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):
- 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)
1.5SMC51A-E3/57T FAQ
1.How can I place an order for 1.5SMC51A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51A-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 1.5SMC51A-E3/57T reliable?
The price and inventory of 1.5SMC51A-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 1.5SMC51A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC51A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51A-E3/57T?
1.5SMC51A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51A-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 1.5SMC51A-E3/57T?
For technical support, including 1.5SMC51A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC51A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51A-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 1.5SMC51A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC51A-E3/57T?
All 1.5SMC51A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51A-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 1.5SMC51A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC51A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51A-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 …
