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Vishay General Semiconductor - Diodes Division SMCJ11AHE3/57T
- Part No.:
- SMCJ11AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11AHE3/57T.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ11AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 11 V standoff voltage (VWM), 12.2–13.5 V breakdown (VBR at 1 mA), 18.2 V clamping voltage (VC) at 82.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and telecom power supplies.
For engineers reviewing the SMCJ11AHE3/57T datasheet, SMCJ11AHE3/57T pinout, SMCJ11AHE3/57T application, or SMCJ11AHE3/57T equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.43), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds VBR (12.2–13.5 V), limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown and low leakage (<5 µA at VWM), while the SMC package provides thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W for effective power dissipation during 10/1000 µs surges up to 1500 W.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, with derating above 25 °C ambient per Figure 2. Its cathode-band polarity marking enables unambiguous orientation during PCB assembly, and it meets UL 497B recognition (QVGQ2) for protector classification in both uni- and bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 11 V - maximum continuous reverse operating voltage before significant leakage; sets minimum system operating margin. |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - precise avalanche initiation threshold defining protection trigger point. |
| VC (Clamping Voltage) | 18.2 V at 82.4 A - peak voltage seen by protected circuit during 10/1000 µs surge; determines IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - maximum transient energy absorption capability under standard 10/1000 µs waveform. |
| IPPM (Peak Pulse Current) | 82.4 A - maximum surge current the device can safely shunt without degradation. |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments. |
| Leakage (ID) | ≤5 µA at 11 V - negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Surge return path | Connected to ground or low-impedance return plane; carries full IPPM during clamping event. |
| Cathode | Reverse-biased input / Protected line connection | Connected to the line being protected (e.g., 12 V rail); blocks VWM but avalanches at VBR to clamp transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment systems. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking; eliminates pre-conditioning overhead in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage drift over time, and immunity to humidity-induced parameter shift. |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1 (−150 V/50 Ω) and IEC 61000-4-5 Combination Wave (0.5/100 µs) surges without failure. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping - critical for protecting 12 V logic interfaces and CAN transceivers with tight VCC margins. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in body control modules against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients before regulation stage. Use Value: Clamps 12 V rail to ≤18.2 V during 82.4 A surges, preserving downstream PMICs and microcontrollers rated for 20 V absolute max. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting fast transients (<1 ns rise time) before signal conditioning op-amps. Use Value: Sub-100 ps response time prevents latch-up in precision amplifiers; <5 µA leakage avoids offset errors in µA-level current loops. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 12 V/24 V PoE-powered network switches against lightning-induced surges on DC input terminals. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, coordinated with MOVs for multi-stage protection. Use Value: 1500 W rating handles IEC 61000-4-5 Level 4 (4 kV line-earth) surges; UL 497B recognition supports safety certification. | Use Scenario: Adding secondary overvoltage protection on VBUS line of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Fast-acting clamp parallel to USB PD controller, triggered before internal FETs enter avalanche. Use Value: 11 V VWM allows normal 5 V/9 V/15 V PD operation while clamping >18 V faults - prevents permanent damage to USB PD PHY. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHE3/52T | Same VWM, VBR, VC, and PPPM, but in smaller SMB (DO-214AA) package with lower IPPM (52.7 A) and higher RθJA (100 °C/W). | Lower surge handling capacity; suitable only for sub-1 kV IEC 61000-4-5 applications or space-constrained layouts where 1500 W is not required. | Select when board area is critical and peak surge current remains below 50 A. |
| SMCJ11CAHE3/57T | Bidirectional variant with identical VWM, VBR, VC, and PPPM, but symmetric clamping in both polarities and no polarity marking. | Required for AC-coupled lines, differential buses (e.g., RS-485), or circuits where reverse polarity transients cannot be ruled out. | Select for bidirectional signal paths or when system-level polarity reversal risk exists. |
Compared with SMBJ11AHE3/52T, SMCJ11AHE3/57T delivers 56% higher surge current capacity and superior thermal performance; compared with SMCJ11CAHE3/57T, it offers polarity-specific clamping with tighter leakage control for DC rail protection.
Availability
SMCJ11AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for SMCJ11AHE3/57T 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 emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness and certified compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ11AHE3/57T at its rated peak pulse current?
The SMCJ11AHE3/57T has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 82.4 A, measured under the standard 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and ensures protected circuits see no more than 18.2 V during worst-case transients - critical for safeguarding 20 V-tolerant ICs in 12 V systems. The SMCJ11AHE3/57T achieves this with low incremental surge resistance and fast avalanche response.
Is SMCJ11AHE3/57T qualified for automotive applications?
Yes, SMCJ11AHE3/57T is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and accelerated life testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensors. The SMCJ11AHE3/57T also meets UL 497B recognition for protector classification in vehicle systems.
What is the standoff voltage (VWM) and why does it matter for SMCJ11AHE3/57T?
The standoff voltage (VWM) of SMCJ11AHE3/57T is 11 V - the maximum DC or continuous reverse voltage the device blocks without entering avalanche conduction. This parameter defines the operating margin between normal system voltage and protection activation; for example, it allows safe use on nominal 12 V rails where transients exceed 11 V but steady-state stays below. Exceeding VWM risks excessive leakage or premature clamping, so proper selection relative to system VCC is essential. The SMCJ11AHE3/57T maintains ≤5 µA leakage at this voltage.
How does the SMC (DO-214AB) package of SMCJ11AHE3/57T affect thermal performance?
The SMC (DO-214AB) package of SMCJ11AHE3/57T provides a thermal resistance of RθJA = 75 °C/W (junction-to-ambient, on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W (junction-to-lead), enabling efficient heat dissipation during repetitive or high-duty-cycle transients. This outperforms smaller packages like SMB (RθJA ≈ 100 °C/W), allowing the SMCJ11AHE3/57T to sustain higher average power in automotive and industrial environments. Its MSL Level 1 rating further ensures compatibility with standard lead-free reflow without popcorn risk.
Can SMCJ11AHE3/57T be used in bidirectional signal protection?
No, SMCJ11AHE3/57T is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current beyond ~3.5 V (VF at 100 A). For bidirectional protection (e.g., RS-485, AC lines, or polarity-agnostic inputs), the bidirectional variant SMCJ11CAHE3/57T must be used instead. Using SMCJ11AHE3/57T on AC or reversibly biased nodes risks forward conduction, overheating, or failure. The SMCJ11AHE3/57T's cathode band marking confirms its polarity-sensitive design.
SMCJ11AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- 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)
SMCJ11AHE3/57T FAQ
1.How can I place an order for SMCJ11AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11AHE3/57T 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 SMCJ11AHE3/57T reliable?
The price and inventory of SMCJ11AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ11AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11AHE3/57T?
SMCJ11AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11AHE3/57T 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 SMCJ11AHE3/57T?
For technical support, including SMCJ11AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11AHE3/57T requirements.
6.How does Aetrix verify that SMCJ11AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ11AHE3/57T 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 SMCJ11AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ11AHE3/57T?
All SMCJ11AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11AHE3/57T, 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 SMCJ11AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ11AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11AHE3/57T Tags
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