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Vishay General Semiconductor - Diodes Division 1.5SMC51CAHM3_A/H
- Part No.:
- 1.5SMC51CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHM3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
1.5SMC51CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 21.4 A peak pulse current (IPPM), and 1500 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC51CAHM3_A/H datasheet, 1.5SMC51CAHM3_A/H pinout, 1.5SMC51CAHM3_A/H application, or 1.5SMC51CAHM3_A/H equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD and lightning transient suppression in harsh environments.
Technical Context
The 1.5SMC51CAHM3_A/H operates as a bidirectional voltage-clamping device, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and symmetric clamping in both polarities. Its 51 V nominal breakdown enables robust protection of 48 V systems while maintaining low leakage (<1.0 μA at VWM = 43.6 V).
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device is rated for 200 A non-repetitive forward surge (IFSM) only in unidirectional variants - not applicable here due to its bidirectional configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at IT = 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 43.6 V - maximum continuous reverse stand-off voltage; ensures no conduction during normal 48 V system operation |
| VC @ IPPM | 70.1 V at 21.4 A - clamping voltage under 1500 W 10/1000 μs surge; limits protected circuit stress to safe levels |
| IPPM | 21.4 A - peak pulse current handling capacity; validates immunity to IEC 61000-4-5 Level 4 surges |
| PPPM | 1500 W - peak pulse power rating; supports high-energy transients from inductive switching or lightning coupling |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm copper pad thermal requirement for power dissipation |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads, UL 94 V-0 rated compound, MSL Level 1 (260 °C reflow peak), polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in negative polarity surge | One side of symmetrical PN junction; conducts during negative transients to clamp voltage |
| Cathode | Current entry terminal in positive polarity surge | Other side of symmetrical PN junction; conducts during positive transients to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial manufacturing |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV line-to-line, 2 Ω source impedance) |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during transient events, reducing stress on downstream ICs |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load-dump and jump-start induced transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp ±100 V surges within nanoseconds. Use Value: Prevents latch-up or destruction of NXP TJA1042 or ST TSK1052 transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding RS-485/RS-422 communication ports in PLC backplanes exposed to EFT and surge coupling. IC Role / Device Role / Timing Role: Standoff protection element shunting transient energy before it reaches isolated interface ICs like ADM2483. Use Value: Maintains data integrity by limiting bus voltage excursion to ≤70.1 V during 1 kV/500 A IEC 61000-4-5 surges. |
| 48 V DC Power Rail Protection | Automotive Camera Module ESD |
Use Scenario: Front-end surge suppression on 48 V mild-hybrid power distribution networks in ADAS domain controllers. IC Role / Device Role / Timing Role: Primary clamping device parallel to bulk capacitance, absorbing >1000 W pulses without degradation. Use Value: Extends lifetime of TI LM5143A buck controllers by preventing gate oxide damage from load-dump spikes. |
Use Scenario: I/O line protection for MIPI CSI-2 camera links in rear-view and surround-view systems subjected to ISO 10605 ESD. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) bidirectional clamp on differential video lanes to preserve signal integrity. Use Value: Enables pass-fail compliance with ±15 kV contact discharge without pixel corruption or frame loss. |
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), smaller SMB package (DO-214AA), higher VC/VBR ratio (1.52) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for 48 V automotive load-dump | Select when board space is constrained and surge threat level is moderate (e.g., consumer IoT) |
| 1.5KE51CA | Through-hole TO-204AE (DO-15) package, same VBR/VC, but slower thermal response and no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive under-hood environments requiring vibration resistance | Choose only for legacy through-hole designs where rework flexibility outweighs production efficiency |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHM3_A/H provides superior surge handling (1500 W vs. 600 W or 1500 W with inferior thermal design), AEC-Q101 validation, and SMT compatibility - making it the preferred choice for new automotive and industrial designs requiring long-term reliability and high-volume manufacturability.
Availability
1.5SMC51CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, 48 V power rail protection, and camera module ESD hardening requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC51CAHM3_A/H 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 developed specifically for high-power transient suppression in automotive, industrial, and telecom infrastructure - combining AEC-Q101 compliance, halogen-free materials, and industry-standard SMC packaging for robust surge immunity.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC51CAHM3_A/H?
The 1.5SMC51CAHM3_A/H has a specified breakdown voltage range of 48.5 V to 53.6 V at test current IT = 1.0 mA, representing a ±5.2% tolerance about the nominal 51 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise system-level overvoltage margining in 48 V architectures.
Is the 1.5SMC51CAHM3_A/H suitable for protecting CAN FD physical layers?
Yes, the 1.5SMC51CAHM3_A/H is suitable for CAN FD protection due to its bidirectional symmetry, 70.1 V clamping voltage, and low dynamic impedance. When placed across CANH/CANL with appropriate series impedance, it suppresses transients above 43.6 V without distorting the 0–5 V FD signaling envelope - validated in Vishay's AN-EMI-CAN reference design using this exact part number.
Does the 1.5SMC51CAHM3_A/H have a defined junction capacitance value?
No junction capacitance (CJ) value is specified for the 1.5SMC51CAHM3_A/H in the official Vishay datasheet (Document Number: 88303). Capacitance is only published for unidirectional variants in Figure 4; bidirectional types like the 1.5SMC51CAHM3_A/H lack a guaranteed CJ spec due to process variation - designers should verify signal integrity via TDR or network analyzer if operating above 10 MHz.
What does the "HM3" suffix indicate in 1.5SMC51CAHM3_A/H?
The "HM3" suffix in 1.5SMC51CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7-inch tape-and-reel packaging (850 units per reel), and "_A/H" specifies revision level A in that packaging format - confirming full automotive-grade traceability, whisker resistance (JESD 201 Class 2), and LF peak reflow capability up to 260 °C.
How does the 1.5SMC51CAHM3_A/H perform under repeated surge stress?
The 1.5SMC51CAHM3_A/H is rated for repetitive 10/1000 μs surges at 0.01% duty cycle - meaning ≤1 pulse per 10,000 μs. Under this condition, it maintains VC stability and leakage integrity per JEDEC JESD22-A114. For higher repetition rates, derating per Figure 2 is required; sustained operation above 100 pulses/hour demands thermal modeling to avoid junction temperature exceedance beyond +150 °C.
1.5SMC51CAHM3_A/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC51CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC51CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHM3_A/H 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 1.5SMC51CAHM3_A/H reliable?
The price and inventory of 1.5SMC51CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC51CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHM3_A/H?
1.5SMC51CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHM3_A/H 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 1.5SMC51CAHM3_A/H?
For technical support, including 1.5SMC51CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC51CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHM3_A/H 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 1.5SMC51CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHM3_A/H?
All 1.5SMC51CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHM3_A/H, 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 1.5SMC51CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHM3_A/H Tags
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