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Vishay General Semiconductor - Diodes Division SMCJ45AHM3_A/H
- Part No.:
- SMCJ45AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ45AHM3_A/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,918
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Product details
Overview
SMCJ45AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for high-energy surge protection with 45 V standoff voltage, 72.7 V clamping voltage at 20.6 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power electronics.
For engineers reviewing the SMCJ45AHM3_A/H datasheet, SMCJ45AHM3_A/H pinout, SMCJ45AHM3_A/H application, or SMCJ45AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance of 75 °C/W junction-to-ambient under standard pad layout.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below 45 V reverse standoff voltage (VWM), then rapidly transitions to low-impedance conduction when transient voltage exceeds its 50.0–55.3 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
It delivers 1500 W peak pulse power handling per 10/1000 μs waveform, with clamping voltage limited to 72.7 V at rated IPPM, enabling robust protection of 48 V rail systems without overstressing downstream components. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on within specified tolerance under standardized test conditions. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamped voltage during full-rated 1500 W surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 μs waveform; enables suppression of high-energy transients per ISO 7637-2 Pulse 5a. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8.0 mm × 8.0 mm copper pads; guides PCB thermal design for sustained reliability at +125 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; suitable for ASIL-B system-level designs. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connects to protected line; conducts surge current to ground when voltage exceeds VBR; polarity-critical for unidirectional operation. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables automated placement on dense PCBs while maintaining 1500 W surge capability-ideal for space-constrained automotive ECUs and industrial controllers. |
| Glass-passivated junction | Ensures stable, repeatable avalanche performance across temperature and lifetime; eliminates parameter drift due to moisture or contamination ingress. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors without additional qualification effort. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance; supports sustainable manufacturing and export compliance. |
| MSL Level 1 rating | Allows unlimited floor life and single reflow up to 260 °C peak-eliminates baking requirements and simplifies SMT production flow. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protection of 48 V battery-fed power distribution modules against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and ground to limit surge voltage to ≤72.7 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents damage to upstream DC-DC converters and downstream microcontrollers by limiting transient energy transfer with <1 ns response time. |
Use Scenario: Input-stage surge suppression on three-phase motor drive inverters exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Standoff-clamp protector on DC bus inputs, absorbing repetitive 1500 W pulses without degradation across 10⁵ cycles. Use Value: Extends IGBT module lifetime by reducing voltage overshoot stress during fault clearing, validated per IEC 61800-3 EMC requirements. |
| Telecom Power Supply Outputs | Automotive Sensor Signal Lines |
|
Use Scenario: Secondary-side overvoltage protection on 48 V telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Fast-response clamping element parallel to output capacitor, activated only during >45 V excursions to preserve regulation stability. Use Value: Maintains ±1% output regulation during normal operation while blocking >99.9% of surge energy above clamping threshold. |
Use Scenario: CAN FD and LIN bus line protection in vehicle cabin modules subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional suppressor placed inline with signal traces to shunt transients to chassis ground. Use Value: Preserves signal integrity up to 5 Mbps CAN FD rates while meeting ISO 10605 ±30 kV air/±15 kV contact ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45AHE3_A/H | Lower PPPM (400 W), same VWM (45 V), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current inductive switching. | Select when board space is critical and surge threat level is restricted to IEC 61000-4-5 Level 3 (0.5 kV/0.25 kA). |
| SMCJ45AHE3_A/H | Identical electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified | Approved for industrial/commercial use only; excluded from automotive OEM BOMs requiring AEC-Q101 and halogen-free materials. | Choose for cost-sensitive non-automotive designs where AEC-Q101 and halogen-free status are not mandated. |
Compared with SMCJ45AHM3_A/H, SMAJ45AHE3_A/H offers smaller size but significantly reduced surge capacity and thermal performance, while SMCJ45AHE3_A/H matches core protection specs but lacks automotive qualification and halogen-free certification required for Tier 1 supply chains.
Availability
SMCJ45AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drives, telecom power supplies, and automotive sensor interface circuits requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ45AHM3_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, efficiency, and application-specific optimization.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping performance and long-term stability under thermal cycling are mandatory.
FAQ
What is the clamping voltage of SMCJ45AHM3_A/H at its rated peak pulse current?
The SMCJ45AHM3_A/H has a maximum clamping voltage (VC) of 72.7 V at its rated peak pulse current (IPPM) of 20.6 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 1500 W transient event and is confirmed in the Vishay datasheet Document Number 88394, page 2.
Is SMCJ45AHM3_A/H qualified for automotive applications?
Yes, SMCJ45AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in the Vishay datasheet revision 09-Jan-2024. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and ESD-to meet automotive reliability standards for under-hood and chassis-mounted systems.
What does the "HM3" suffix signify in SMCJ45AHM3_A/H?
The "HM3" suffix in SMCJ45AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It differentiates this variant from commercial-grade "E3" or "M3" versions and ensures compliance with automotive material restrictions and environmental regulations per JESD201 Class 2 whisker testing.
Can SMCJ45AHM3_A/H be used in bidirectional configurations?
No, SMCJ45AHM3_A/H is a unidirectional TVS diode, as confirmed by its part number ending in "A" (not "CA") and the presence of a cathode band marking. Bidirectional operation requires the "CA" suffix variant (e.g., SMCJ45CA), which lacks polarity marking and conducts symmetrically in both directions.
What is the thermal resistance of SMCJ45AHM3_A/H under standard mounting conditions?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ45AHM3_A/H is 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet Document Number 88394, page 3. This value assumes no additional heatsinking and guides PCB layout for thermal management in continuous surge scenarios.
SMCJ45AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ45AHM3_A/H FAQ
1.How can I place an order for SMCJ45AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ45AHM3_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 SMCJ45AHM3_A/H reliable?
The price and inventory of SMCJ45AHM3_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 SMCJ45AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ45AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ45AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ45AHM3_A/H?
SMCJ45AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ45AHM3_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 SMCJ45AHM3_A/H?
For technical support, including SMCJ45AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ45AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ45AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ45AHM3_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 SMCJ45AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ45AHM3_A/H?
All SMCJ45AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ45AHM3_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 SMCJ45AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ45AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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