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Vishay General Semiconductor - Diodes Division SMCJ45AHE3_A/H
- Part No.:
- SMCJ45AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ45AHE3_A/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,986
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Product details
Overview
SMCJ45AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 45 V standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ45AHE3_A/H datasheet, SMCJ45AHE3_A/H pinout, SMCJ45AHE3_A/H application, or SMCJ45AHE3_A/H equivalent, key selection criteria include clamping performance under 20.6 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 μs double-exponential surge waveform, with derating applied above TA = 25 °C per Figure 2 of the datasheet.
The SMCJ45AHE3_A/H is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and carries AEC-Q101 qualification - confirmed by the "HE3" suffix and ordering code structure in the Vishay documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 50.0 V / 55.3 V at IT = 1 mA - ensures reliable avalanche turn-on within tight tolerance band |
| VC @ IPPM | 72.7 V at 20.6 A - limits downstream voltage stress during 1500 W transient events |
| PPPM | 1500 W - peak power handling capability for 10/1000 μs surges on standard PCB pads |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial settings |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, measured on minimum recommended pad layout |
| Package | SMC (DO-214AB) - surface-mount outline with cathode band marking, compatible with J-STD-002 solderability |
Pinout & Package
SMCJ45AHE3_A/H uses the SMC (DO-214AB) package: a surface-mount, low-profile case with matte tin-plated leads, polarity indicated by a cathode band on the unidirectional device. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per datasheet Fig. 2 derating guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-referenced surge clamp node | Connected to protected line; conducts avalanche current toward ground when VLINE exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC specification |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 rating | Enables single-reflow assembly without baking; peak reflow tolerance up to 260 °C |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients by reducing dynamic impedance under surge conditions |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity when properly laid out |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients before they reach LDO input. Use Value: Clamps 72.7 V at 20.6 A, limiting stress on downstream regulators rated for ≤ 40 V absolute max. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) in PLC I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to shunt induced common-mode energy. Use Value: Sub-ns response ensures clamping occurs before sensor amplifier input stages are damaged by >1 kV transients. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Board Protection |
Use Scenario: Shielding PoE-powered switch port circuitry from lightning-induced surges entering via Ethernet magnetics. IC Role / Device Role / Timing Role: Primary TVS on 48 V DC input rail upstream of DC/DC converter. Use Value: 1500 W PPPM rating handles repeated 10/1000 μs surges without degradation under telecom duty cycles. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners). IC Role / Device Role / Timing Role: Clamp diode across motor terminals to absorb back-EMF during MOSFET turn-off. Use Value: 200 A IFSM rating supports high-current commutation events without bond wire failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (~110 °C/W) | Suitable only for lower-energy transients; not AEC-Q101 qualified | Select when board space is constrained and surge threat level is ≤ IEC 61000-4-5 Level 2 |
| 1.5KE45A | Through-hole DO-201 package, same VWM/VBR/VC specs, but no AEC-Q101 qualification and higher mounting thermal resistance | Used in legacy industrial designs where reworkability and manual assembly are prioritized over automotive compliance | Choose for cost-sensitive non-automotive applications requiring identical electrical clamping but accepting larger footprint |
Compared with SMAJ45A-E3/57T and 1.5KE45A, the SMCJ45AHE3_A/H delivers higher surge robustness (1500 W vs. 400 W or 1500 W with inferior thermal management), AEC-Q101 qualification, and optimized SMT manufacturability - making it the preferred choice for new automotive and high-reliability industrial designs.
Availability
SMCJ45AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMCJ45AHE3_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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and 1500 W surge handling are mandatory.
FAQ
What does the 'HE3' suffix indicate in SMCJ45AHE3_A/H?
The 'HE3' suffix in SMCJ45AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification - confirmed in Vishay's ordering information table and mechanical data section. This distinguishes it from commercial-grade 'E3' variants and ensures suitability for automotive applications requiring validated reliability testing.
Is SMCJ45AHE3_A/H unidirectional or bidirectional?
SMCJ45AHE3_A/H is a unidirectional TVS diode, as indicated by the absence of 'CA' in its part number and explicit labeling in the 'DEVICE TYPE' column of the electrical characteristics table. Polarity is marked by a cathode band, and it conducts only during reverse-biased overvoltage events.
What is the maximum clamping voltage for SMCJ45AHE3_A/H at rated surge current?
The maximum clamping voltage (VC) for SMCJ45AHE3_A/H is 72.7 V, measured at the peak pulse current (IPPM) of 20.6 A using a 10/1000 μs waveform - per the 'ELECTRICAL CHARACTERISTICS' table on page 2 of Vishay document 88394.
Can SMCJ45AHE3_A/H be used in place of SMCJ45A-E3/57T?
No - while both share the same VWM and VC ratings, SMCJ45AHE3_A/H is AEC-Q101 qualified and supplied in tape-and-reel packaging with 'H' carrier code, whereas SMCJ45A-E3/57T is commercial-grade with different packaging and no automotive qualification. Interchange requires validation of reliability requirements.
What PCB pad layout is required to achieve the rated 1500 W pulse power for SMCJ45AHE3_A/H?
To achieve the full 1500 W peak pulse power rating, SMCJ45AHE3_A/H must be mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the 'MAXIMUM RATINGS' footnote (2) and Figure 2 derating curve - smaller pads reduce thermal dissipation and require power derating.
SMCJ45AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ45AHE3_A/H FAQ
1.How can I place an order for SMCJ45AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ45AHE3_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 SMCJ45AHE3_A/H reliable?
The price and inventory of SMCJ45AHE3_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 SMCJ45AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ45AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ45AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ45AHE3_A/H?
SMCJ45AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ45AHE3_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 SMCJ45AHE3_A/H?
For technical support, including SMCJ45AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ45AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ45AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ45AHE3_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 SMCJ45AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ45AHE3_A/H?
All SMCJ45AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ45AHE3_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 SMCJ45AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ45AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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