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Vishay General Semiconductor - Diodes Division 1.5SMC51CAHM3/H
- Part No.:
- 1.5SMC51CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHM3/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC51CAHM3/H 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 IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 21.4 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC51CAHM3/H datasheet, 1.5SMC51CAHM3/H pinout, 1.5SMC51CAHM3/H application, or 1.5SMC51CAHM3/H equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, SMC (DO-214AB) package thermal resistance (RθJL = 15 °C/W), low leakage (<1.0 µA at VWM = 43.6 V), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
The 1.5SMC51CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±51 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1.0 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching spikes.
Rated for 1500 W peak pulse power (10/1000 µs), it delivers 21.4 A IPPM while maintaining VC ≤ 70.1 V, with thermal derating governed by RθJA = 75 °C/W and RθJL = 15 °C/W. The device is qualified to AEC-Q101 and rated for operation from −65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at IT = 1.0 mA - defines precise avalanche initiation threshold for bidirectional clamping |
| Stand-off Voltage VWM | 43.6 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA |
| Clamping Voltage VC | 70.1 V at IPPM = 21.4 A - limits protected circuit voltage during worst-case 1500 W surge |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - supports high-energy transients common in automotive load-dump and industrial switching |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - surface-mount footprint with 8.0 mm × 8.0 mm copper pad thermal management per JEDEC standard |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Non-polarized terminals | No band marking; symmetrical conduction in both directions - simplifies PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W surge rating | Enables single-device protection of AC-coupled or floating signal lines without external polarity management |
| AEC-Q101 qualification (HM3) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow soldering (J-STD-020 MSL 1) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| Fast response time (<1 ns) | Clamps ESD events (IEC 61000-4-2) before sensitive downstream ICs experience overstress |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V system: +120 V/0.1 s) with VC ≤ 70.1 V, preventing latch-up or damage to 5 V/3.3 V interface ICs. |
Use Scenario: Safeguarding PLC digital input channels against field-wiring induced surges and ground loop transients in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, mounted adjacent to terminal block with minimum trace length. Use Value: Withstands repetitive 1500 W pulses (duty cycle 0.01 %) without degradation, ensuring long-term reliability in harsh electromagnetic environments. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Shielding RS-485/RS-232 data lines in base station backhaul equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS across differential pair (A–B) and to ground, providing symmetrical clamping without skew. Use Value: Clamps 10/1000 µs surges to ≤70.1 V while exhibiting <1.0 µA leakage at 43.6 V - preserving signal eye diagram and minimizing standby power loss. |
Use Scenario: Board-level ESD protection for USB 2.0/3.0 and DisplayPort auxiliary channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF typical at 0 V) placed at connector to absorb IEC 61000-4-2 ±8 kV contact discharge. Use Value: Sub-1 ns response ensures clamping occurs before transceiver ICs experience >10 V stress, meeting USB-IF and VESA ESD immunity requirements. |
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/VC, SMB (DO-214AA) package - smaller footprint but higher thermal resistance (RθJA = 90 °C/W) | Suitable for space-constrained consumer ports where surge energy is limited to IEC 61000-4-5 2nd edition (0.5 J) | Select when board area is critical and surge threat level is below 1500 W; verify thermal margin with reduced copper pad area. |
| 1.5KE51CA | Higher power (1500 W), axial-leaded DO-201AD package - no SMT compatibility, higher parasitic inductance (>10 nH) | Used in legacy through-hole designs or prototyping where rework flexibility outweighs automated assembly needs | Choose only for non-SMT builds; avoid in high-frequency or high-speed signal paths due to lead inductance limiting clamping speed. |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, and SMC package thermal performance (RθJL = 15 °C/W), making it the preferred choice for production automotive and industrial SMT assemblies requiring long-term reliability and regulatory alignment.
Availability
1.5SMC51CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, AEC-Q101 validation, and halogen-free manufacturing compliance.
Supply support for 1.5SMC51CAHM3/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 high-reliability, high-power, and automotive-grade solutions.
The 1.5SMC Series was engineered for surface-mount transient suppression in demanding environments - delivering consistent clamping performance, AEC-Q101 qualification, and thermal robustness across automotive, industrial, and telecom applications.
FAQ
What does the 'CA' suffix indicate in 1.5SMC51CAHM3/H?
The 'CA' suffix in 1.5SMC51CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities without cathode/anode distinction. This eliminates orientation sensitivity during placement and enables use on AC-coupled or floating lines, unlike unidirectional variants (e.g., 1.5SMC51AHM3/H) that require correct polarity alignment relative to ground.
Is 1.5SMC51CAHM3/H qualified for automotive applications?
Yes, 1.5SMC51CAHM3/H is AEC-Q101 qualified, as confirmed by the 'HM3' suffix indicating halogen-free, RoHS-compliant construction with full automotive reliability testing. It meets requirements for temperature cycling, highly accelerated life testing (HALT), and ESD robustness - making it suitable for engine control, ADAS camera modules, and body electronics where sustained operation up to +150 °C junction temperature is required.
What is the maximum clamping voltage of 1.5SMC51CAHM3/H at its rated peak pulse current?
The maximum clamping voltage (VC) of 1.5SMC51CAHM3/H is 70.1 V at its rated peak pulse current (IPPM) of 21.4 A, measured under the standardized 10/1000 µs double-exponential waveform. This value ensures protected downstream components - such as 5 V microcontrollers or RS-485 transceivers - remain within safe operating voltage limits during worst-case surge events.
How does the SMC (DO-214AB) package of 1.5SMC51CAHM3/H improve thermal performance compared to SMB?
The SMC (DO-214AB) package of 1.5SMC51CAHM3/H offers lower thermal resistance than SMB (DO-214AA), with RθJL = 15 °C/W versus ~25 °C/W for SMB. Its larger copper pad footprint (0.31" × 0.31") and optimized leadframe design enable more efficient heat dissipation during repetitive surge events - critical for maintaining reliability in automotive and industrial applications where ambient temperatures exceed 85 °C.
What is the reverse leakage current specification for 1.5SMC51CAHM3/H at its stand-off voltage?
At its maximum stand-off voltage (VWM) of 43.6 V, the reverse leakage current (ID) of 1.5SMC51CAHM3/H is guaranteed to be ≤1.0 µA at TA = 25 °C. This low leakage preserves signal integrity and minimizes standby power loss in high-impedance sensor interfaces and battery-powered systems where quiescent current budget is tightly constrained.
1.5SMC51CAHM3/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:
- 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:
- 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/H FAQ
1.How can I place an order for 1.5SMC51CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHM3/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/H reliable?
The price and inventory of 1.5SMC51CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHM3/H?
1.5SMC51CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHM3/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/H?
For technical support, including 1.5SMC51CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC51CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHM3/H?
All 1.5SMC51CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHM3/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/H part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHM3/H Tags
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