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Vishay General Semiconductor - Diodes Division 1.5SMC47CAHM3/H
- Part No.:
- 1.5SMC47CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CAHM3/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,534
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Product details
Overview
1.5SMC47CAHM3/H 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 47 V standoff voltage (VWM), 64.8 V clamping voltage (VC) at 23.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC47CAHM3/H datasheet, 1.5SMC47CAHM3/H pinout, 1.5SMC47CAHM3/H application, or 1.5SMC47CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and compliance with UL 497B surge protector requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 40.2 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold (44.7–49.4 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
The 1.5SMC47CAHM3/H is rated for repetitive 10/1000 μs surges at 0.01% duty cycle, with thermal resistance RθJA = 75 °C/W and maximum junction temperature of 150 °C. It meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 40.2 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping. |
| VBR (Breakdown Voltage) | 44.7–49.4 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 64.8 V at 23.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC/MOSFET survivability. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains single 10/1000 μs surge without failure; enables protection against lightning-induced and inductive-switching transients. |
| ID (Reverse Leakage) | <1.0 μA at 40.2 V - Negligible standby power loss and minimal loading on sensitive signal or bias networks. |
| TJ max. | 150 °C - Enables operation in under-hood automotive and high-ambient industrial environments without derating. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design; supports automated placement and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads, UL 94 V-0 flammability rating, and polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts surge current in either polarity; connects to protected line or ground return path depending on layout. |
| Cathode | Transient current sink (bidirectional) | Electrically identical to anode in CA devices; no polarity marking required; symmetric clamping behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, sensor bridges) without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports under-hood and ADAS sensor applications. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly laid out; eliminates need for cascaded protection stages. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates (JEDEC J-STD-20, JESD201 Class 2 whisker resistance) for industrial and consumer end equipment. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles (peak 260 °C); eliminates baking requirements and simplifies SMT manufacturing. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) and LIN/CAN transceiver pins from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed between signal line and chassis ground to clamp transients before they reach interface ICs. Use Value: Prevents latch-up or permanent damage to automotive-grade op-amps and transceivers during 12 V system load dump events (up to 35 V, 400 ms). |
Use Scenario: Safeguarding digital input modules against field-wiring induced surges (e.g., relay coil back-EMF, motor drive coupling). IC Role / Device Role / Timing Role: Primary front-end surge limiter on 24 V DC input terminals, preceding optocoupler or Schmitt trigger inputs. Use Value: Maintains functional safety integrity by limiting transient voltage to <65 V, well below 75 V absolute maximum ratings of common industrial logic ICs. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Protecting Ethernet PHY magnetics secondary side and PoE-powered device DC inputs from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping device across differential pairs or supply rails to absorb common-mode transients. Use Value: Achieves IEC 61000-4-5 compliance (2 kV line-earth, 1 kV line-line) without additional series impedance or filtering complexity. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber-connected TVS across motor terminals or flyback diode replacement for faster energy dissipation. Use Value: Reduces EMI radiation and prevents microcontroller reset events caused by >100 V inductive kickback on shared 5 V/3.3 V logic rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Same VWM (40.2 V) and VC (64.8 V), but lower PPPM (600 W) and smaller SMB (DO-214AA) package. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when board space is constrained and surge threat level is ≤ Level 2 (1 kV). |
| 1.5KE47CA | Same electrical specs, but axial-leaded DO-15 package; higher RθJA (~100 °C/W) and no AEC-Q101 qualification. | Not suitable for automated SMT assembly or automotive under-hood environments; requires through-hole mounting. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ47CA and 1.5KE47CA, the 1.5SMC47CAHM3/H delivers full 1500 W surge handling in an AEC-Q101-qualified SMT package - enabling compact, high-reliability protection for next-generation automotive and industrial control systems without layout or qualification compromises.
Availability
1.5SMC47CAHM3/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, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC47CAHM3/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, efficiency, and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and standardized SMC packaging are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC47CAHM3/H?
The "CA" suffix in 1.5SMC47CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical clamping in both polarities, with no cathode marking required. This distinguishes it from unidirectional "A" variants and enables use on AC-coupled or floating lines such as RS-485, CAN bus, or transformer-isolated interfaces without polarity alignment concerns.
Is 1.5SMC47CAHM3/H suitable for automotive under-hood applications?
Yes, 1.5SMC47CAHM3/H is AEC-Q101 qualified and rated for TJ = –65 °C to +150 °C, making it suitable for under-hood automotive applications including engine control units, transmission sensors, and body electronics. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating further support high-reliability automotive manufacturing processes.
How does the clamping voltage of 1.5SMC47CAHM3/H compare to its breakdown voltage?
The 1.5SMC47CAHM3/H has a breakdown voltage (VBR) range of 44.7–49.4 V at 1 mA and a maximum clamping voltage (VC) of 64.8 V at 23.1 A IPPM. This ~30% overvoltage margin ensures protected ICs see no more than 64.8 V during worst-case 10/1000 μs surges - well within typical 75 V absolute maximum ratings of automotive interface ICs while maintaining sufficient headroom above the 40.2 V stand-off voltage.
Can 1.5SMC47CAHM3/H replace older 1.5KE47CA parts in new designs?
Yes, 1.5SMC47CAHM3/H is a direct surface-mount functional replacement for through-hole 1.5KE47CA, matching its VWM (40.2 V), VBR (44.7–49.4 V), and VC (64.8 V). However, due to its SMC (DO-214AB) footprint and AEC-Q101 qualification, it enables higher-density layouts and automotive-grade reliability - though PCB redesign is required to accommodate the SMT pad pattern.
What is the significance of the "HM3" and "/H" in 1.5SMC47CAHM3/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, while "/H" specifies packaging in 7-inch plastic tape-and-reel (850 units per reel). Together, they define the environmental compliance, reliability testing, and logistics format - critical for automotive Tier 1 suppliers and industrial OEMs requiring full material traceability and process compatibility.
1.5SMC47CAHM3/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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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)
1.5SMC47CAHM3/H FAQ
1.How can I place an order for 1.5SMC47CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CAHM3/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 1.5SMC47CAHM3/H reliable?
The price and inventory of 1.5SMC47CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CAHM3/H?
1.5SMC47CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CAHM3/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 1.5SMC47CAHM3/H?
For technical support, including 1.5SMC47CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC47CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CAHM3/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 1.5SMC47CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CAHM3/H?
All 1.5SMC47CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CAHM3/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 1.5SMC47CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC47CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47CAHM3/H Tags
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Diodes Incorporated
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