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Diodes Incorporated SMAJ58A-13-F
- Part No.:
- SMAJ58A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58A-13-F.pdf
- Description:
- TVS DIODE 58VWM 93.6VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:171,306
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Product details
Overview
SMAJ58A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 58V reverse standoff voltage (VRWM), 64.4V minimum breakdown voltage (VBR), 93.6V maximum clamping voltage (VC) at 4.3A peak pulse current (IPP), and operates across –55°C to +150°C. It is widely deployed in automotive body control modules to safeguard CAN transceivers against ISO 7637-2 load dump and ESD events.
For engineers reviewing the SMAJ58A-13-F datasheet, SMAJ58A-13-F pinout, SMAJ58A-13-F application, or SMAJ58A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse power handling under 8.3ms surge waveforms, unidirectional polarity alignment with rail grounding topology, and SMA package thermal performance under sustained ambient temperatures up to +125°C.
Technical Context
This TVS diode employs glass-passivated junction construction for stable avalanche characteristics and fast sub-nanosecond response to transients. Its unidirectional configuration enables asymmetric clamping-conducting only during reverse overvoltage-making it suitable for positive-rail protection where cathode connects to the protected line and anode to ground.
The device complies with IEC 61000-4-2 (±30kV contact/±30kV air) and IEC 61000-4-4 (40A 5/50ns) immunity standards when properly laid out. Thermal derating follows a linear curve: peak pulse power drops to 75% at +75°C ambient and 50% at +125°C, while steady-state dissipation remains limited to 1.0W at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine surges without failure; defines maximum energy absorption capability |
| Reverse Standoff Voltage (VRWM) | 58V - maximum continuous DC or RMS voltage before significant leakage; sets upper limit for protected rail voltage |
| Clamping Voltage (VC) | 93.6V @ IPP = 4.3A - actual voltage seen by downstream circuit during worst-case transient; must stay below protected IC absolute max rating |
| Breakdown Voltage (VBR) | 64.4V min @ IT = 1.0mA - onset of controlled avalanche conduction; ensures reliable turn-on before VC threshold is exceeded |
| Junction Operating Temp | –55°C to +150°C - validated operation across full automotive under-hood temperature range without parameter shift or reliability loss |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.29–2.92mm height and 4.00–4.60mm length; supports automated placement and reflow |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band marking on top surface for unidirectional polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Reference/Return Node | Connected to system ground; establishes reference for clamping action and carries full surge return current |
| Cathode (K) | Protected Line Terminal | Connected to the line being protected (e.g., 12V battery rail); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) up to 120V/100ms in 12V systems without degradation |
| Glass-Passivated Die | Ensures stable VBR and low leakage (<5µA @ VRWM) over lifetime and temperature; eliminates passivation-related drift in automotive environments |
| Lead-Free & Halogen-Free | Meets RoHS 3 (2015/863/EU) and automotive "Green" requirements (<900ppm Br, <900ppm Cl, <1000ppm Sb) |
| Fast Response Time | Sub-nanosecond turn-on limits voltage overshoot during ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) events |
| Moisture Sensitivity Level 1 | Eliminates bake requirement prior to reflow; compatible with standard J-STD-020 assembly processes |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects 12V supply input of BCM microcontroller and CAN transceiver from load dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local LDO input; clamps within 1ns to hold voltage ≤93.6V during 120V/400ms pulses. Use Value: Prevents latch-up or permanent damage to 5V/3.3V logic supplies downstream; maintains functional safety integrity per ISO 26262 ASIL-B requirements. |
Use Scenario: Shields 24V digital input channel of programmable logic controller from field-wiring induced surges and inductive kickback. IC Role / Device Role / Timing Role: Primary front-end clamp on isolated input stage; absorbs repetitive 1kV/500A 8/20μs transients per IEC 61000-4-5 Level 3. Use Value: Extends mean time between failures (MTBF) of input optocoupler and conditioning circuitry; reduces field returns due to surge-induced false triggering. |
| Telecom Power Supply Interface | Medical Patient Monitor Front-End |
Use Scenario: Guards 48V DC input of telecom base station power converter against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line TVS in multi-stage protection scheme; handles bulk energy before downstream MOVs and GDTs activate. Use Value: Limits let-through voltage to <100V, enabling use of lower-voltage-rated MOSFETs and gate drivers in primary-side control circuitry. |
Use Scenario: Secures analog sensor inputs (ECG, SpO₂) connected to patient cables against electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance (≈100pF) unidirectional TVS placed directly at connector; clamps ±15kV contact ESD per IEC 61000-4-2. Use Value: Preserves signal integrity of mV-level biopotential signals; avoids baseline shift or amplifier saturation during ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CA-13-F | Bidirectional version; symmetrical clamping for AC-coupled or floating signal lines; higher capacitance (~120pF) | Required where both polarities of transient must be suppressed (e.g., RS-485 bus lines) | Select only if bidirectional clamping is mandated; otherwise unidirectional offers lower leakage and tighter VC margin |
| SMBJ58A-13-F | Same electrical specs but SMB (DO-214AA) package; 20% larger footprint; 600W peak power rating | Preferred where higher surge margin or board-level thermal mass allows larger package | Choose when design requires >400W headroom or existing layout uses SMB pads; avoid if space-constrained or cost-sensitive |
Compared with SMAJ58A-13-F, the SMAJ58CA-13-F adds bidirectional capability at the cost of higher capacitance and slightly reduced ESD robustness, while SMBJ58A-13-F trades compactness for higher surge capacity and thermal mass-making SMAJ58A-13-F optimal for space-limited 12V automotive and industrial DC rail protection.
Availability
SMAJ58A-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital inputs, and telecom power supply interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q-compliant traceability.
Supply support for SMAJ58A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes engineered specifically for robust, standardized overvoltage protection in harsh-environment applications-emphasizing repeatable clamping, low leakage, and automotive-grade process control.
FAQ
What is the maximum clamping voltage of SMAJ58A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 93.6V measured at a peak pulse current (IPP) of 4.3A using the 8.3ms half-sine waveform defined in IEC 61000-4-5. This value is guaranteed across the full operating temperature range and represents the highest voltage imposed on the protected circuit during worst-case surge conditions.
Can SMAJ58A-13-F be used in bidirectional signal line protection?
No-SMAJ58A-13-F is a unidirectional TVS diode with cathode-band polarity marking and asymmetrical conduction. For bidirectional protection (e.g., RS-485, USB, or AC-coupled lines), the SMAJ58CA-13-F variant must be used, which provides symmetrical clamping in both polarities and is marked without a cathode band.
Does this part meet automotive qualification standards?
The standard SMAJ58A-13-F is not AEC-Q200 qualified; however, Diodes offers the automotive-compliant SMAJ58AQ-13-F variant, manufactured in IATF 16949-certified facilities and qualified to AEC-Q200 Rev D. That part includes PPAP documentation and enhanced lot traceability for automotive production programs.
How does the SMA package affect thermal performance in high-density PCB layouts?
The SMA (DO-214AC) package has a junction-to-lead thermal resistance (RθJL) of approximately 15°C/W. In high-density layouts, thermal relief on copper pours and adjacent ground planes significantly impacts steady-state power handling; at +75°C lead temperature, the device is rated for 1.0W continuous dissipation, dropping to ~0.5W at +125°C ambient with minimal copper area.
SMAJ58A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- 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):
- 4.3A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ58A-13-F FAQ
1.How can I place an order for SMAJ58A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58A-13-F 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 SMAJ58A-13-F reliable?
The price and inventory of SMAJ58A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ58A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58A-13-F?
SMAJ58A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58A-13-F 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 SMAJ58A-13-F?
For technical support, including SMAJ58A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58A-13-F requirements.
6.How does Aetrix verify that SMAJ58A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ58A-13-F 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 SMAJ58A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ58A-13-F?
All SMAJ58A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58A-13-F, 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 SMAJ58A-13-F part is unused and in its original packaging.
Return procedure for SMAJ58A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58A-13-F Tags
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