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Alpha & Omega Semiconductor Inc. SMDJ60A
- Part No.:
- SMDJ60A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ60A.pdf
- Description:
- 1CH 60V UNIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:3,736
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Product details
Overview
SMDJ60A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 60 V reverse standoff voltage (VRWM), 66.7–73.7 V breakdown voltage (VBR) at 1 mA, 96.8 A peak pulse current (IPP), 3000 W peak pulse power (10/1000 µs), and DO-214AB (SMC J-Bend) surface-mount package - deployed in industrial motor drives to clamp lightning-induced transients on 48 V DC bus rails.
For engineers reviewing the SMDJ60A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (96.8 V @ IPP), unidirectional polarity, thermal resistance (RθJA = 75 °C/W), JEDEC DO-214AB mechanical compatibility, and IEC 61000-4-5 surge immunity support in power supply front-ends.
Technical Context
The SMDJ60A operates as a silicon avalanche diode with glass-passivated junction and low-profile J-bend leads. Its fast response time (<1.0 ps) enables suppression of ESD and lightning surges before downstream ICs are damaged, while its 0.01% duty cycle rating limits thermal accumulation during repetitive events.
Designed for surface mounting on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 3000 W peak pulse power under standardized 10/1000 µs waveform conditions and maintains stable VBR with ±0.1 %/°C temperature coefficient - critical for consistent clamping across -55 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 60.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system DC rail margin. |
| VBR @ IT=1 mA | 66.7–73.7 V - Measured breakdown range ensures reliable avalanche initiation without premature conduction. |
| Vc @ IPP=96.8 A | 96.8 V - Clamping voltage under full 3000 W surge; defines maximum stress imposed on protected circuitry. |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity; validates compliance with IEC 61000-4-5 Level 4 (4 kV) testing. |
| TJ max / TSTG | -55 to +150 °C - Wide junction/storage temperature range supports operation in harsh industrial environments. |
| RθJA / RθJL | 75 / 15 °C/W - Thermal resistance values guide PCB copper area design and predict steady-state power derating. |
| IR @ VRWM | 2.0 µA - Low leakage preserves efficiency in high-impedance bias networks and battery-powered systems. |
Pinout & Package
DO-214AB (SMC J-Bend) package: molded plastic case with matte tin lead-free plating, JEDEC-compliant outline, color band indicating cathode (unidirectional polarity), and strain-relieved J-bend terminals for mechanical robustness during reflow and board flexure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point in protected circuit; completes clamping path during overvoltage. |
| Cathode (banded end) | High-side surge input node | Connected to line being protected (e.g., 48 V DC bus); avalanche conduction initiates here during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity, thermal cycling, and high-voltage stress. |
| Fast response time <1.0 ps | Enables sub-nanosecond clamping onset - critical for protecting sensitive gate drivers and microcontrollers from ESD. |
| MSL1 rating (260 °C peak) | Supports standard lead-free reflow profiles without moisture-induced popcorn failure or delamination. |
| UL 94V-0 flammability | Confirms flame-retardant polymer housing meets safety standards for enclosed industrial equipment. |
| Built-in strain relief | Reduces solder joint fatigue and cracking risk in vibration-prone applications like transportation electronics. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protecting 48 V DC bus inputs in variable-frequency drives against lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between bus rail and chassis ground to shunt >3 kV transients within nanoseconds. Use Value: Limits clamped voltage to 96.8 V, ensuring downstream MOSFETs and gate drivers remain below their absolute maximum ratings. | Use Scenario: Safeguarding primary-side rectifier outputs in telecom AC/DC converters subjected to AC line surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted across bulk capacitor to absorb 3000 W pulses without thermal runaway. Use Value: Maintains 60 V VRWM margin above nominal 48 V output, preventing false triggering during normal ripple and load transients. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Clamping load-dump transients on 12 V auxiliary power rails in BCMs during alternator disconnection events. IC Role / Device Role / Timing Role: High-power unidirectional suppressor connected between battery feed and local regulator input. Use Value: Withstands 300 A peak forward surge (IFSM = 300 A, 8.3 ms) and clamps to ≤96.8 V, preserving LDO and CAN transceivers. | Use Scenario: Protecting DC-link capacitors in solar string inverters exposed to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Surge-absorbing element across 600–1000 V DC bus segments to prevent overvoltage failure of IGBT modules. Use Value: Delivers 3000 W pulse power handling with 150 °C max junction temperature, enabling reliable operation in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC60A (Littelfuse) | Same DO-214AB package, identical VRWM (60 V) and PPPM (3000 W), but higher Vc = 100 V @ IPP. | Marginally higher clamping voltage reduces protection level for 75 V-rated components. | Select when UL 94V-0 and MSL1 are not required; verify layout fits SAC60A's slightly larger body dimensions. |
| 1.5KE60A (ON Semiconductor) | Through-hole DO-201AD package, same electrical specs but incompatible mounting and thermal performance (RθJA ≈ 100 °C/W). | Requires PCB redesign and lacks surface-mount strain relief; unsuitable for high-vibration environments. | Choose only for legacy through-hole designs where rework is impractical and thermal derating is acceptable. |
Compared with SAC60A and 1.5KE60A, the SMDJ60A provides superior thermal management (RθJA = 75 °C/W), J-bend mechanical robustness, and tighter VBR tolerance - making it optimal for new SMT-based industrial power systems requiring long-term reliability and high surge immunity.
Availability
SMDJ60A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and renewable energy inverters requiring stable component supply, RoHS-compliant packaging, and traceable sourcing.
Supply support for SMDJ60A 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, TVS diodes, and power ICs for industrial, computing, and consumer markets.
The SMDJ60A belongs to AOS's SMDJxxxA series of high-power unidirectional TVS diodes, engineered specifically for ruggedized DC power line protection in harsh electromagnetic environments.
FAQ
What is the clamping voltage of the SMDJ60A under maximum rated surge conditions?
The SMDJ60A has a maximum clamping voltage (Vc) of 96.8 V when subjected to its peak pulse current (IPP) of 96.8 A under the standardized 10/1000 µs waveform. This value is measured at TJ = 25 °C with devices mounted on 8.0 mm × 8.0 mm copper pads per terminal, and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does the SMDJ60A support bidirectional transient suppression?
No, the SMDJ60A is a unidirectional TVS diode, indicated by the "A" suffix and single cathode band marking. For bidirectional operation, the SMDJ60CA variant must be used - it shares the same VRWM and PPPM ratings but conducts symmetrically in both polarities, making it suitable for AC-coupled signal lines or differential bus protection.
What is the maximum operating temperature and thermal resistance of the SMDJ60A?
The SMDJ60A has a maximum junction temperature (TJ max) of +150 °C and specified thermal resistances of RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient). These values assume mounting on 8.0 mm × 8.0 mm copper pads; actual thermal performance depends on PCB layout, airflow, and adjacent heat sources.
Is the SMDJ60A compatible with lead-free reflow soldering processes?
Yes, the SMDJ60A is rated MSL1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. Its matte tin lead-free plating and glass-passivated junction ensure reliable solder joint formation and long-term intermetallic stability under standard Pb-free reflow profiles without moisture sensitivity concerns.
How does the SMDJ60A compare to older 1.5KE-series TVS diodes in terms of mounting and performance?
The SMDJ60A replaces through-hole 1.5KE60A with a surface-mount DO-214AB package offering superior thermal dissipation (RθJA = 75 vs. ~100 °C/W), built-in strain relief for vibration resistance, and compatibility with automated SMT assembly. Electrically, both share identical VRWM (60 V) and PPPM (3000 W), but the SMDJ60A achieves faster response (<1.0 ps) and tighter VBR tolerance.
SMDJ60A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 31A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB
SMDJ60A FAQ
1.How can I place an order for SMDJ60A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ60A 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 SMDJ60A reliable?
The price and inventory of SMDJ60A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ60A is usually 5 days.
3.What payment methods are accepted for SMDJ60A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ60A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ60A?
SMDJ60A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ60A 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 SMDJ60A?
For technical support, including SMDJ60A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ60A requirements.
6.How does Aetrix verify that SMDJ60A is sourced from the original manufacturer or authorized distributors?
All SMDJ60A 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 SMDJ60A meets industry standards.
7.What is the process for return or replacement of SMDJ60A?
All SMDJ60A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ60A, 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 SMDJ60A part is unused and in its original packaging.
Return procedure for SMDJ60A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ60A Tags
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