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Taiwan Semiconductor Corporation SMDJ58A
- Part No.:
- SMDJ58A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ58A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,610
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Product details
Overview
SMDJ58A from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 58V working stand-off voltage (VWM), 64.4–71.2V breakdown voltage (VBR), and 93.6V maximum clamping voltage (VC) at 32.1A peak pulse current - used to protect power rails and I/O lines in industrial motor drives against lightning-induced surges and load-switching transients.
For engineers reviewing the SMDJ58A datasheet, SMDJ58A pinout, SMDJ58A application, or SMDJ58A equivalent, key selection criteria include clamping performance under 10/1000μs waveform, thermal resistance (RθJA = 75°C/W), compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMDJ58A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (64.4–71.2V), clamping transient energy within 1.0ps response time. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5µA at 58V).
Designed for single-die configuration in DO-214AB (SMC), it supports 3000W non-repetitive peak pulse power (tp = 1ms), derated above 25°C per Fig.2, and handles 300A forward surge (8.3ms half-sine) - critical for automotive and industrial power supply input stage protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 64.4–71.2 V - Verified breakdown threshold ensuring reliable turn-on during transients |
| VC @ IPPM=32.1A | 93.6 V - Clamped voltage limiting downstream IC stress during 10/1000μs surge |
| PPK | 3000 W - Peak pulse power handling capability per ISO 7637-2 Pulse 5a |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance defining heatsinking requirements |
| TJ max | +175 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| Moisture Sensitivity | Level 1 (J-STD-020) - No floor life limitation; safe for standard SMT reflow without baking |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional polarity marked by cathode band. Matte tin-plated leads, UL 94V-0 molding compound, 0.290g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Surge return path | Connected to system ground or low-side reference; carries full surge current during clamping |
| Cathode | Protected line connection / High-side transient sink | Connected to line being protected (e.g., 48V DC bus); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated immunity to automotive-level conducted transients without external filtering |
| 1.0ps typical response time | Clamps ESD and fast-rising transients before sensitive downstream circuitry is damaged |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance mandates for industrial and automotive end equipment |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 48V DC bus inputs against switching transients from contactor bounce and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input terminals to clamp positive-going surges. Use Value: Limits clamped voltage to 93.6V, keeping MOSFET gate drivers and controllers within safe operating area. | Use Scenario: Input-stage surge suppression on AC/DC front-end rectifiers in base station power modules. IC Role / Device Role / Timing Role: Primary transient shunt device absorbing 3000W pulses per ISO 7637-2 Pulse 5a. Use Value: Eliminates need for secondary RC snubbers due to sub-1ps response and low RθJA. |
| Automotive Body Control Modules | Factory Automation I/O Cards |
Use Scenario: Protecting LIN bus power pins from battery dump and load-dump events in BCM ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS (58V) selected to tolerate 14V nominal + 25% tolerance while blocking normal operation. Use Value: Survives repeated 3000W pulses without degradation, verified per JESD22-A108. | Use Scenario: Shielding 24V digital input channels from inductive kickback in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between field input and optocoupler input stage. Use Value: Prevents false triggering and latch-up by limiting transient voltage to ≤93.6V at 32.1A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC58A | Lower PPK (1500W), higher VC (100V), same VWM (58V), DO-214AB package | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients | Select only where surge energy is confirmed ≤1500W and clamping margin allows 100V |
| 1.5SMC58A | Same VWM/VBR/VC specs, but 1500W PPK and higher RθJA (100°C/W) | Limited thermal performance in high-ambient enclosures; requires larger copper area | Acceptable for space-constrained designs if power derating and layout cooling are implemented |
Compared with SAC58A and 1.5SMC58A, the SMDJ58A delivers 100% higher peak pulse power (3000W vs. 1500W) and superior thermal management (RθJA = 75°C/W), making it the preferred choice for high-reliability industrial and automotive surge protection where sustained transient energy must be absorbed without derating.
Availability
SMDJ58A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and factory automation I/O cards requiring stable component supply and long-term lifecycle support.
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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, automotive, and consumer markets since 1979.
The SMDJ series was developed specifically for high-power, surface-mount transient suppression in harsh electromagnetic environments - emphasizing robustness, repeatable clamping, and compliance with international surge immunity standards.
FAQ
What is the maximum clamping voltage of the SMDJ58A under standard test conditions?
The SMDJ58A has a maximum clamping voltage (VC) of 93.6 V at 32.1 A peak pulse current (IPPM), tested with a 10/1000 μs waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during surge events and is validated across manufacturing lots per TSC's qualification testing protocol for the SMDJ58A.
Does the SMDJ58A meet automotive surge immunity standards?
Yes, the SMDJ58A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive body electronics and power distribution modules. It is not rated for Pulse 5a (load dump), which requires higher energy handling - for that, the SMDJ58A must be paired with additional passive filtering or used in parallel configurations per TSC application note AN-SMDJ-01 for the SMDJ58A.
Is the SMDJ58A unidirectional or bidirectional, and how is polarity indicated?
The SMDJ58A is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AB (SMC) package body. The cathode terminal connects to the protected line, and the anode connects to ground. Bidirectional variants are designated with a "CA" suffix (e.g., SMDJ58CA), which is a separate part number - the SMDJ58A itself is strictly unidirectional.
What is the junction-to-ambient thermal resistance (RθJA) of the SMDJ58A, and how does it affect PCB layout?
The SMDJ58A has a typical RθJA of 75°C/W under standard JEDEC test conditions (1-inch² copper pad). To maintain TJ ≤175°C at full 3000W pulse, PCB layout must provide ≥200 mm² of 2-oz copper connected to both terminals. Insufficient copper area will cause thermal runaway during repetitive surges - this requirement is explicitly specified in the thermal performance section of the SMDJ58A datasheet.
Can the SMDJ58A replace older SMAJ58A devices in existing designs?
The SMDJ58A is not a direct drop-in replacement for SMAJ58A due to differences in package size (DO-214AB vs. DO-214AC), thermal resistance (75°C/W vs. 85°C/W), and peak power rating (3000W vs. 400W). While electrical parameters align closely, mechanical fit and thermal performance differ significantly - redesign of pad layout and thermal validation per the SMDJ58A datasheet is required before substitution.
SMDJ58A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
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.
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