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Vishay General Semiconductor - Diodes Division 1.5SMC51CAHE3/9AT
- Part No.:
- 1.5SMC51CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHE3/9AT.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,832
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Product details
Overview
1.5SMC51CAHE3/9AT 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 IT = 1 mA), 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 telecom line protection.
For engineers reviewing the 1.5SMC51CAHE3/9AT datasheet, 1.5SMC51CAHE3/9AT pinout, 1.5SMC51CAHE3/9AT application, or 1.5SMC51CAHE3/9AT equivalent, this AEC-Q101-qualified, RoHS-compliant SMC (DO-214AB) package device delivers verified bidirectional clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and lightning surge protection design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ps), enabling effective suppression of fast-rising transients from inductive switching or ESD events.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.102 %/°C temperature coefficient of VBR. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting reliable operation under repetitive surge conditions when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at IT = 1 mA - defines precise voltage threshold where clamping initiates reliably |
| 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 transient, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 μs waveform) - peak surge energy handling capacity for lightning and load-switching events |
| IPPM | 21.4 A - maximum non-repetitive surge current the device safely diverts without failure |
| TJ max. | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly |
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), polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical junction - connects to protected line or ground reference point |
| Cathode | Terminal K | Other side of symmetrical junction - forms bidirectional clamping path with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates polarity concerns in AC or floating-line protection |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control and ADAS sensor nodes |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when properly laid out - reduces need for cascaded protection stages |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during transients - protects 5 V and 3.3 V logic interfaces without additional voltage margin |
| MSL Level 1 rating | Zero floor life limitation - supports standard SMT reflow without baking or special handling |
Applications
| Automotive Sensor Protection | Industrial Ethernet Port Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and jump-start induced transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, responding within <1 ps to limit line voltage to ≤70.1 V. Use Value: Prevents latch-up or permanent damage to ISO 11898-2/3 compliant transceivers during 12 V system surges up to ±100 V. |
Use Scenario: Safeguarding RJ45 PHY interface pins against ESD (IEC 61000-4-2 ±8 kV contact) and surge (IEC 61000-4-5) in factory automation gateways. IC Role / Device Role / Timing Role: Primary line-side TVS on differential pairs, operating symmetrically to preserve signal integrity during fast transients. Use Value: Maintains <1 pF junction capacitance at zero bias, avoiding signal distortion on 100BASE-TX links while meeting EN 61000-6-2 immunity requirements. |
| Telecom DSL Line Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced common-mode surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices across tip/ring and tip/ground, clamping mode-selective transients without DC path disruption. Use Value: Handles 1500 W peak pulses while maintaining VWM = 43.6 V - sufficient headroom above 40 V nominal line voltage with margin for ringing. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge outputs, diverting flyback energy away from gate drivers and MCU GPIOs. Use Value: Withstands 200 A unidirectional surge (IFSM) and 21.4 A bidirectional IPPM - covers worst-case commutation spikes without degradation over 10⁵ cycles. |
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 | Same VBR range (48.5–53.6 V) but lower PPPM = 600 W; SMB (DO-214AA) package - 30% smaller footprint, 35% lower surge capacity | Preferred for space-constrained consumer electronics where 600 W surge margin suffices; not recommended for automotive or industrial mains-connected systems | Select SMBJ51CA only if layout area is critical and surge threat level is limited to IEC 61000-4-2 ESD, not lightning or load dump |
| 1.5KE51CA | Same electrical specs but axial leaded DO-15 package; higher thermal resistance (RθJA ≈ 100 °C/W vs. 75 °C/W); no AEC-Q101 qualification | Suitable for prototyping or through-hole legacy designs; lacks automotive qualification and SMT process compatibility | Choose 1.5KE51CA for hand-soldered evaluation or cost-sensitive non-automotive applications where reflow compatibility is not required |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHE3/9AT provides superior surge robustness (1500 W), automotive qualification, and optimized SMT manufacturability - making it the preferred choice for production-grade automotive, industrial, and telecom equipment requiring long-term reliability and high-energy transient immunity.
Availability
1.5SMC51CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial Ethernet ports, telecom DSL line protection, and appliance motor drive inputs requiring stable component supply and AEC-Q101 compliance.
Supply support for 1.5SMC51CAHE3/9AT 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 high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high peak power, low clamping, and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC51CAHE3/9AT?
The 1.5SMC51CAHE3/9AT has a specified breakdown voltage range of 48.5 V to 53.6 V at test current IT = 1 mA, representing a ±5.2% tolerance around the nominal 51 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports precise overvoltage margining in safety-critical circuits.
Is 1.5SMC51CAHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC51CAHE3/9AT is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS-compliant and automotive-grade construction. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - validated for use in engine control units, ADAS sensors, and body electronics where reliability under vibration and thermal stress is essential.
What is the maximum clamping voltage of 1.5SMC51CAHE3/9AT at its rated peak pulse current?
The 1.5SMC51CAHE3/9AT clamps to a maximum of 70.1 V at its rated peak pulse current of 21.4 A (10/1000 μs waveform). This VC value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does 1.5SMC51CAHE3/9AT have polarity markings on the package?
No, the 1.5SMC51CAHE3/9AT is a bidirectional TVS and carries no polarity marking on the SMC (DO-214AB) package. Unlike unidirectional variants (e.g., 1.5SMC51A), it functions identically in either orientation - simplifying PCB layout and eliminating risk of incorrect placement during automated assembly.
What is the moisture sensitivity level (MSL) rating for 1.5SMC51CAHE3/9AT?
The 1.5SMC51CAHE3/9AT is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it has unlimited floor life and can be processed using standard lead-free SMT reflow profiles without pre-baking - reducing manufacturing complexity and cost in high-volume production.
1.5SMC51CAHE3/9AT 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC51CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC51CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHE3/9AT 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 1.5SMC51CAHE3/9AT reliable?
The price and inventory of 1.5SMC51CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC51CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHE3/9AT?
1.5SMC51CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHE3/9AT 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 1.5SMC51CAHE3/9AT?
For technical support, including 1.5SMC51CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC51CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHE3/9AT 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 1.5SMC51CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHE3/9AT?
All 1.5SMC51CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHE3/9AT, 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 1.5SMC51CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHE3/9AT Tags
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