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Alpha & Omega Semiconductor Inc. SMDJ58A
- Part No.:
- SMDJ58A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ58A.pdf
- Description:
- 1CH 58V UNIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:5,111
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Product details
Overview
SMDJ58A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for high-energy surge protection in DC power lines and signal interfaces. It features a 58 V reverse standoff voltage (VRWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage at 32.1 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMDJ58A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 32.1 A surge, thermal resistance (RθJL = 15 °C/W), unidirectional polarity with cathode band marking, and DO-214AB package compatibility with automated SMT assembly.
Technical Context
The SMDJ58A operates as a silicon avalanche diode optimized for fast transient suppression. Its glass-passivated junction enables sub-1 ps response time from 0 V to breakdown, while its low-profile DO-214AB package supports high-density PCB layouts. Thermal design relies on 8.0 mm × 8.0 mm copper pads per terminal to achieve RθJA = 75 °C/W and sustain 150 °C maximum junction temperature.
It complies with JEDEC DO-214AB mechanical standards and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). The device exhibits a temperature coefficient of ΔVBR = 0.1% × VBR @ 25 °C × ΔT and maintains ≤2.0 µA reverse leakage at VRWM - critical for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 64.4–71.2 V - guaranteed avalanche conduction threshold for reliable overvoltage triggering |
| Vc @ IPPM | 93.6 V - clamped voltage at 32.1 A peak pulse ensures downstream ICs see <94 V during surge |
| PPPM (10/1000 µs) | 3000 W - energy-handling capacity sufficient for IEC 61000-4-5 Level 4 surges |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper |
| TJ max | +150 °C - extended junction temperature rating supports operation in enclosed industrial enclosures |
| IR @ VRWM | ≤2.0 µA - minimal leakage preserves battery life in always-on monitoring systems |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating. Cathode indicated by color band on body; terminals are solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; grounded reference in TVS configuration | Connected to protected line's low-side return path or chassis ground for unidirectional clamping |
| Cathode | Current exit point in forward bias; high-voltage input in TVS mode | Connected to the line being protected (e.g., +58 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps from 0 V to VBR - limits voltage overshoot during ESD and lightning-induced transients |
| Glass passivated junction | Enhanced reliability and stable VBR over lifetime vs. epoxy-passivated alternatives |
| Built-in strain relief | Reduces mechanical stress on solder joints during thermal cycling in automotive under-hood applications |
| MSL Level 1 rating | Compatible with standard Pb-free reflow profiles up to 260 °C peak without preconditioning |
| UL 94V-0 flammability | Self-extinguishing plastic housing meets safety requirements for enclosed power equipment |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sensing circuits against IGBT switching transients and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across DC bus rails or between gate and source. Use Value: Limits transient voltage to ≤93.6 V at 32.1 A, preventing latch-up or oxide rupture in 650 V SiC MOSFET drivers. | Use Scenario: Surge suppression on -48 V DC distribution lines in central office and remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input stage prior to DC/DC converters and PMICs. Use Value: Withstands 3000 W pulses per IEC 61000-4-5, maintaining ≤2.0 µA leakage to avoid loading -48 V standby rails. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, referenced to vehicle chassis. Use Value: Sub-1 ps response ensures clamping before transceiver ESD protection diodes activate, reducing cumulative stress. | Use Scenario: DC-link overvoltage suppression in solar string inverters subjected to grid-switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across 600 V DC-link capacitors to absorb inductive kickback energy. Use Value: 150 °C TJ max and RθJL = 15 °C/W enable sustained operation in outdoor-rated enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC58A (Littelfuse) | Same DO-214AB package; VBR = 64.4–71.2 V; Vc = 93.6 V at 32.1 A; PPPM = 3000 W | Identical clamping performance but higher typical IR (5 µA vs. 2 µA) | Preferred where cost sensitivity outweighs ultra-low leakage requirements |
| 1.5SMC58A (ON Semiconductor) | Same VRWM/VBR/Vc ratings; identical 3000 W PPPM; DO-214AB package; RθJA = 75 °C/W | Same thermal profile but lacks MSL Level 1 rating - requires moisture preconditioning before reflow | Acceptable for non-Pb-free processes or legacy reflow lines without 260 °C capability |
Compared with SAC58A and 1.5SMC58A, the SMDJ58A offers lower leakage (≤2 µA), guaranteed MSL Level 1 compliance, and tighter VBR tolerance - making it optimal for battery-backed systems and high-reliability automated SMT lines.
Availability
SMDJ58A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and full traceability.
Supply support for SMDJ58A 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, IGBTs, and protection devices for power conversion and management.
The SMDJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and renewable energy systems where high-energy surge immunity is mandatory.
FAQ
What is the maximum clamping voltage of the SMDJ58A under rated surge conditions?
The SMDJ58A has a maximum clamping voltage (VC) of 93.6 V when subjected to its rated peak pulse current of 32.1 A on a 10/1000 µs waveform. This value is measured per industry-standard test conditions and ensures protected circuitry remains below critical voltage thresholds during transient events. The SMDJ58A maintains this clamping performance across its specified operating temperature range of –55 °C to +150 °C.
Is the SMDJ58A suitable for bidirectional surge protection?
No, the SMDJ58A is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. For bidirectional applications, the SMDJ58CA variant must be used - it shares identical electrical ratings but features symmetrical breakdown in both directions. The SMDJ58A includes a cathode band marking and is not rated for reverse conduction beyond its specified leakage current.
What is the thermal resistance from junction to ambient for the SMDJ58A?
The SMDJ58A has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes standard JEDEC test conditions and is critical for calculating steady-state temperature rise. For accurate thermal design, engineers should also consider RθJL = 15 °C/W and use board-level thermal modeling tools to validate performance in actual layout configurations.
Does the SMDJ58A meet RoHS and halogen-free requirements?
Yes, the SMDJ58A is an AOS Green Product: it is RoHS compliant, lead-free, and halogen-free per AOS' published Green Policy. It meets UL 94V-0 flammability standards and carries no restricted substances above IEC 62474 Declarable Substance List thresholds. Full compliance documentation, including material declarations and test reports, is available upon request for SMDJ58A procurement.
What is the reverse leakage current specification for the SMDJ58A at its VRWM?
The SMDJ58A specifies a maximum reverse leakage current (IR) of 2.0 µA at its rated reverse standoff voltage (VRWM) of 58.0 V and ambient temperature of 25 °C. This low leakage supports energy-sensitive applications such as battery-powered sensors and always-on monitoring circuits. Leakage remains within specification across the full operating temperature range up to +150 °C junction temperature.
SMDJ58A 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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 32.1A
- 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
SMDJ58A FAQ
1.How can I place an order for SMDJ58A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ58A 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 SMDJ58A reliable?
The price and inventory of SMDJ58A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ58A is usually 5 days.
3.What payment methods are accepted for SMDJ58A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ58A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ58A?
SMDJ58A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ58A 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 SMDJ58A?
For technical support, including SMDJ58A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ58A requirements.
6.How does Aetrix verify that SMDJ58A is sourced from the original manufacturer or authorized distributors?
All SMDJ58A 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 SMDJ58A meets industry standards.
7.What is the process for return or replacement of SMDJ58A?
All SMDJ58A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ58A, 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 SMDJ58A part is unused and in its original packaging.
Return procedure for SMDJ58A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ58A Tags
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