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Vishay General Semiconductor - Diodes Division SMCJ51CAHE3_A/H
- Part No.:
- SMCJ51CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ51CAHE3_A/H.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,731
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Product details
Overview
SMCJ51CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 51 V standoff voltage (VWM), 82.4 V clamping voltage (VC) at 18.2 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ51CAHE3_A/H datasheet, SMCJ51CAHE3_A/H pinout, SMCJ51CAHE3_A/H application, or SMCJ51CAHE3_A/H equivalent, this device is selected for robust bidirectional clamping in 12–48 V DC power rails, automotive body electronics, and industrial I/O interfaces where AEC-Q101 qualification, low incremental surge resistance, and MSL Level 1 reliability are required.
Technical Context
This TVS diode operates bidirectionally with symmetrical breakdown characteristics: minimum VBR = 56.7 V and maximum VBR = 62.7 V at 1 mA test current, enabling consistent clamping in both polarities. Its glass-passivated junction ensures stable performance under repeated surge stress, while the SMC package supports automated placement and meets UL 94 V-0 flammability rating.
Thermal design is enabled by RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient on recommended 8.0 mm × 8.0 mm copper pads), allowing reliable operation up to TJ = +150 °C. The device is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min / max | 56.7 V / 62.7 V at 1 mA - Ensures predictable bidirectional breakdown threshold across production lot |
| VC @ IPPM | 82.4 V at 18.2 A - Clamping voltage during 10/1000 μs surge limits protected circuit stress |
| PPPM | 1500 W - Peak pulse power handling capability for high-energy transients |
| ID @ VWM | 1.0 μA - Low leakage preserves signal integrity and power efficiency in standby |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with standard SMT assembly and reflow profiles |
Pinout & Package
SMCJ51CAHE3_A/H uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals and no polarity marking (bidirectional configuration). Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), with 8.0 mm × 8.0 mm recommended copper pad area per terminal for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive and negative surges relative to cathode |
| Cathode | Transient return path (bidirectional) | Functions identically to anode in bidirectional mode; no band marking distinguishes polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor interfaces requiring long-term reliability under thermal cycling and vibration |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 50 Ω source impedance without degradation |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream components during fast-rising transients |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without moisture sensitivity concerns |
| Glass passivated junction | Reduces parameter drift and improves long-term stability under repetitive surge conditions |
Applications
| Automotive Body Electronics | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door module microcontrollers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail and ground near IC supply pins. Use Value: Limits transient voltage to ≤82.4 V during 100 A/10 ms load dump events, preventing latch-up or gate oxide damage in 5 V/3.3 V logic. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog input modules from ESD and field wiring surges. IC Role / Device Role / Timing Role: Primary surge shunt connected between signal line and chassis ground. Use Value: Clamps 1 kV/500 A 10/1000 μs transients within 1 ns, preserving ADC accuracy and isolator integrity. |
| Telecom Power Feeds | Consumer Appliance Motor Drives |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced common-mode surges on DC feed lines. IC Role / Device Role / Timing Role: Secondary-level TVS mounted on DC input stage upstream of DC/DC converter. Use Value: Absorbs 1500 W surge energy without failure, maintaining IEEE 802.3af/at compliance and avoiding system reset. | Use Scenario: Suppressing commutation spikes from BLDC motor drivers in smart washing machines and HVAC fans. IC Role / Device Role / Timing Role: Rail-to-rail clamping device across H-bridge supply and ground. Use Value: Limits VDS overshoot to <85 V during 200 A turn-off events, preventing MOSFET avalanche failure and EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC51CA | Lower PPPM (600 W), same VWM (51 V), smaller SMA package (DO-214AC) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤1 kV |
| SMCJ51CAHM3_A/H | Identical electrical specs; halogen-free, RoHS-compliant variant with HM3 suffix | No functional difference; used where halogen-free materials are mandated in final product | Select for green manufacturing compliance without redesign |
Compared with SAC51CA, SMCJ51CAHE3_A/H delivers >2.5× higher surge energy handling in the same application context; compared with SMCJ51CAHM3_A/H, it shares identical protection performance but differs only in material composition and qualification documentation scope.
Availability
SMCJ51CAHE3_A/H is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC analog inputs, and telecom power-over-Ethernet systems requiring stable component supply, AEC-Q101 traceability, and long-lifecycle support.
Supply support for SMCJ51CAHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The SMCJ series targets high-power transient suppression in harsh environments; its design prioritizes low clamping ratio, AEC-Q101 qualification, and compatibility with automated SMT assembly for automotive and industrial end equipment.
FAQ
What is the clamping voltage of SMCJ51CAHE3_A/H at its rated peak pulse current?
The SMCJ51CAHE3_A/H has a maximum clamping voltage (VC) of 82.4 V at 18.2 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMCJ51CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMCJ51CAHE3_A/H suitable for automotive applications?
Yes, SMCJ51CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101 qualified construction. It is deployed in body electronics, infotainment power supplies, and sensor interfaces where reliability under thermal cycling, vibration, and load dump conditions is mandatory. The SMCJ51CAHE3_A/H meets all stress test requirements defined in AEC-Q101 Rev D.
How does the bidirectional configuration of SMCJ51CAHE3_A/H affect its circuit implementation?
The bidirectional configuration of SMCJ51CAHE3_A/H means it provides symmetrical clamping for both positive and negative voltage transients without polarity marking-no cathode band is present. This allows direct placement across any two nodes requiring protection regardless of DC bias direction, such as AC-coupled signal lines or floating power domains. Unlike unidirectional variants, the SMCJ51CAHE3_A/H does not conduct during normal forward-biased operation.
What is the thermal resistance profile of SMCJ51CAHE3_A/H and how does it impact PCB layout?
SMCJ51CAHE3_A/H has RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient on 8.0 mm × 8.0 mm copper pads). To maintain TJ ≤ 150 °C under 1500 W surge, PCB layout must use minimum 8 mm² copper per terminal with internal thermal vias. Reducing pad size increases RθJA and risks thermal runaway during repetitive surges. The SMCJ51CAHE3_A/H datasheet specifies exact mounting pad dimensions for compliance.
Does SMCJ51CAHE3_A/H meet industry surge immunity standards such as IEC 61000-4-5?
Yes, SMCJ51CAHE3_A/H is rated for 1500 W peak pulse power with a 10/1000 μs waveform, which corresponds to IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 Ω source impedance) when applied with appropriate series impedance. Its low clamping voltage (82.4 V) and fast response time ensure protected circuits meet immunity requirements without additional filtering. System-level validation of SMCJ51CAHE3_A/H is required per IEC 61000-4-5 test setup, but the device itself satisfies core energy-handling criteria.
SMCJ51CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- 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)
SMCJ51CAHE3_A/H FAQ
1.How can I place an order for SMCJ51CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ51CAHE3_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 SMCJ51CAHE3_A/H reliable?
The price and inventory of SMCJ51CAHE3_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 SMCJ51CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ51CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ51CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ51CAHE3_A/H?
SMCJ51CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ51CAHE3_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 SMCJ51CAHE3_A/H?
For technical support, including SMCJ51CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ51CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ51CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ51CAHE3_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 SMCJ51CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ51CAHE3_A/H?
All SMCJ51CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ51CAHE3_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 SMCJ51CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ51CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ51CAHE3_A/H Tags
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