My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC47CAHM3/I
- Part No.:
- 1.5SMC47CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CAHM3/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,806
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC47CAHM3/I 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 a 47 V standoff voltage (VWM), 52.2–57.7 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), 64.8 V clamping voltage at 23.1 A peak pulse current, and operates across -65 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC47CAHM3/I datasheet, 1.5SMC47CAHM3/I pinout, 1.5SMC47CAHM3/I application, or 1.5SMC47CAHM3/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and direct alternatives with documented parameter divergence - all confirmed from Vishay's official 88303 document revision 09-Mar-2026.
Technical Context
The 1.5SMC47CAHM3/I is a glass-passivated, bidirectional TVS diode optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its symmetrical avalanche structure enables identical clamping performance in both polarities, with low incremental surge resistance ensuring stable voltage limiting under repetitive 10/1000 μs surges at 0.01% duty cycle.
It meets J-STD-020 MSL Level 1 (260 °C peak reflow), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is halogen-free and RoHS-compliant per Vishay HM3 suffix designation - confirming suitability for automotive-grade surface-mount assembly without derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 47 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin for 48 V nominal systems. |
| VBR (Breakdown) | 52.2–57.7 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 64.8 V at IPPM = 23.1 A - peak voltage seen by protected circuit during 1500 W transient; critical for IC-level voltage tolerance. |
| PPPM | 1500 W (10/1000 μs waveform) - energy-handling capacity for lightning and inductive-switching surges in industrial environments. |
| TJ max. | +150 °C - enables operation in under-hood automotive locations and high-ambient industrial enclosures without thermal shutdown. |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads; informs heatsinking requirements. |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements, including temperature cycling and HTRB. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetric anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; forms symmetrical path with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; paired with anode to clamp both voltage polarities identically. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in differential or AC-coupled lines. |
| 1500 W peak pulse rating | Sustains 23.1 A at 64.8 V under 10/1000 μs surge - exceeds IEC 61000-4-5 Level 4 (4 kV) requirements for industrial ports. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental mandates and IPC-J-STD-609A Class 1 material declarations. |
| MSL Level 1 moisture sensitivity | Zero floor life limitation - can be stored indefinitely and placed directly into 260 °C reflow without baking. |
| Glass-passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground to shunt surge energy before it reaches precision amplifier or MCU GPIO. Use Value: Maintains signal integrity below 64.8 V during 1500 W transients, preserving ADC accuracy and preventing latch-up in AEC-Q100 qualified microcontrollers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage limiter at terminal block entry point, coordinated with series current-limiting resistor and downstream filtering. Use Value: Clamps transients within 1 ns while sustaining 23.1 A peak current - prevents damage to op-amp input stages and protects isolation barriers. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter ESD Protection |
Use Scenario: Secondary protection on Ethernet PHY interface lines (e.g., MDI-X) and POTS line cards exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Fast-acting parallel clamp between differential pair and chassis ground, working with common-mode chokes. Use Value: Symmetrical 47 V standoff allows use on balanced lines without DC bias shift; 64.8 V clamping aligns with Ethernet PHY absolute maximum ratings. |
Use Scenario: Input-stage protection on USB-C PD and Qi wireless charging adapters subjected to user-handling ESD (IEC 61000-4-2 ±8 kV contact). IC Role / Device Role / Timing Role: First-line defense on AC/DC rectifier output and DC bus rails, absorbing fast-rising ESD events before bulk capacitors. Use Value: Low clamping voltage (64.8 V) prevents overvoltage stress on 65 V-rated MOSFETs and secondary-side controllers in compact adapter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Same VWM (47 V) and bidirectional function, but lower PPPM (600 W) and higher RθJA (100 °C/W); SMB package (smaller footprint, lower thermal mass). | Limited to sub-1 kV surge environments (e.g., consumer USB ports); unsuitable for IEC 61000-4-5 Level 3+ or automotive load-dump. | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| 1.5KE47CA | Same VWM and bidirectional clamping, but through-hole DO-15 package; identical 1500 W rating but slower response (>5 ns) and higher parasitic inductance. | Not suitable for high-frequency signal lines or automated SMT production; requires wave-solder or hand-solder process. | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs performance trade-offs. |
Compared with 1.5SMC47CAHM3/I, SMBJ47CA offers smaller size but sacrifices 60% surge power handling and thermal robustness, while 1.5KE47CA retains full power rating but introduces layout and manufacturing constraints incompatible with modern SMT automotive and industrial platforms.
Availability
1.5SMC47CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and consistent 1500 W surge immunity.
Supply support for 1.5SMC47CAHM3/I 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, MOSFETs, optoelectronics, and passive components - with core expertise in high-reliability, high-power protection devices.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in automotive, industrial, and telecom infrastructure - emphasizing AEC-Q101 qualification, halogen-free construction, and repeatable clamping performance under harsh thermal and electrical stress.
FAQ
What does the "CA" suffix indicate in 1.5SMC47CAHM3/I?
The "CA" suffix in 1.5SMC47CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., 1.5SMC47AHM3/I), it has no cathode band marking and exhibits identical VBR, VC, and IPPM characteristics in either direction, making it ideal for AC-coupled or differential signal lines where polarity is undefined.
Is 1.5SMC47CAHM3/I qualified for automotive applications?
Yes, 1.5SMC47CAHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay documentation (Document 88303). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock - validating its reliability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What is the clamping voltage of 1.5SMC47CAHM3/I at its rated peak pulse current?
The clamping voltage (VC) of 1.5SMC47CAHM3/I is 64.8 V at its specified peak pulse current (IPPM) of 23.1 A, measured using the standardized 10/1000 μs double-exponential waveform. This value represents the maximum voltage imposed on the protected circuit during a full 1500 W transient event and is critical for ensuring compatibility with downstream ICs rated for ≤65 V absolute maximum input voltage.
How does the HM3 suffix differ from E3 or M3 in 1.5SMC47CAHM3/I?
The HM3 suffix in 1.5SMC47CAHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant commercial grade) and M3 (halogen-free RoHS-compliant commercial grade). HM3 adds automotive-grade reliability validation and is required for Tier 1 automotive supply chains where both environmental compliance and stress-test certification are mandatory.
Can 1.5SMC47CAHM3/I be used in place of a unidirectional TVS like 1.5SMC47AHM3/I?
No - 1.5SMC47CAHM3/I is bidirectional and lacks polarity marking, whereas 1.5SMC47AHM3/I is unidirectional with a cathode band. Substituting them requires verifying circuit topology: 1.5SMC47CAHM3/I suits AC or floating lines (e.g., RS-485, CAN), while 1.5SMC47AHM3/I is for DC-biased rails (e.g., 12 V supply lines). Using the wrong type risks incomplete protection or unintended conduction during normal operation.
1.5SMC47CAHM3/I 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/I FAQ
1.How can I place an order for 1.5SMC47CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CAHM3/I 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/I reliable?
The price and inventory of 1.5SMC47CAHM3/I 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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CAHM3/I?
1.5SMC47CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CAHM3/I 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/I?
For technical support, including 1.5SMC47CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC47CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CAHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CAHM3/I?
All 1.5SMC47CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CAHM3/I, 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/I part is unused and in its original packaging.
Return procedure for 1.5SMC47CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47CAHM3/I 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 …
