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Diodes Incorporated SMAJ60A-13
- Part No.:
- SMAJ60A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60A-13.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,825
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Product details
Overview
SMAJ60A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 60V reverse standoff voltage (VRWM), 66.7–73.7V breakdown voltage (VBR) at 1mA, 96.8V maximum clamping voltage (VC) at 4.1A peak pulse current (IPP), and operates from –55°C to +150°C junction temperature.
For engineers reviewing the SMAJ60A-13 datasheet, SMAJ60A-13 pinout, SMAJ60A-13 application, or SMAJ60A-13 equivalent, key selection criteria include clamping performance under 8.3ms surge waveforms, unidirectional polarity for DC rail protection, RoHS-compliant SMA package compatibility with automated assembly, and thermal derating above 25°C ambient.
Technical Context
This TVS diode uses glass-passivated silicon junction technology to achieve fast response time (<1 ps) and low dynamic impedance during transient events. Its unidirectional configuration enables integration into polarized DC supply rails without reverse-bias leakage concerns beyond 5 µA at VRWM.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) immunity standards when applied with appropriate PCB layout practices. Thermal performance is defined by steady-state power dissipation of 1.0W at TL = 75°C and pulse derating per Fig. 1 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 8.3ms half-sine surges up to 400W without failure under specified test conditions. |
| Reverse Standoff Voltage (VRWM) | 60 V - Maximum continuous DC or RMS voltage the device blocks before entering avalanche conduction. |
| Breakdown Voltage (VBR) | 66.7–73.7 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage. |
| Max Clamping Voltage (VC) | 96.8 V @ IPP = 4.1 A - Limits downstream circuit voltage during surge, protecting 100V-rated components. |
| Junction Temperature Range | –55°C to +150°C - Supports operation in automotive engine compartments and industrial control enclosures. |
| Package | SMA (DO-214AC) - Standard surface-mount outline with 4.80–5.59 mm body length and 2.01–2.30 mm terminal width. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band marking for polarity identification, and matte tin lead finish compliant with RoHS Directive 2002/95/EC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or lower-potential node in unidirectional configuration. | Enables low VF (3.5 V @ 35 A) conduction path during positive transients on cathode-side protected lines. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 60V DC rail). | Provides precise clamping reference; cathode band marking ensures correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 400W peak pulse power rating | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive 12V systems without degradation. |
| Fast response time (<1 ps) | Clamps ESD events (IEC 61000-4-2 ±8 kV contact) before sensitive ICs experience overstress. |
| RoHS-compliant matte tin plating | Supports lead-free reflow profiles (JEDEC J-STD-020C Level 1) without solder joint embrittlement. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs subjected to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤96.8V, preventing damage to 100V-input buck controllers and ensuring ASIL-B compliance. |
Use Scenario: 24V digital input modules exposed to field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on dry-contact or PNP sensor inputs. Use Value: Absorbs 40A surge current (per JEDEC test) while maintaining <5 µA leakage at 24V nominal operation. |
| Telecom DC Feeder Protection | Medical Equipment Power Entry |
Use Scenario: -48V telecom rectifier outputs feeding base station radios. IC Role / Device Role / Timing Role: Unidirectional clamp on negative rail to suppress switching noise and lightning-induced spikes. Use Value: Delivers 400W pulse handling with 96.8V clamping, compatible with -48V system margin and EN 61000-4-5 Level 4 requirements. |
Use Scenario: AC/DC adapter secondary side in Class II medical devices (e.g., patient monitors). IC Role / Device Role / Timing Role: Secondary-side overvoltage limiter on isolated 5V/12V logic rails. Use Value: Provides reinforced insulation support with 150°C max junction temperature and UL 94V-0 housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60A-E3/5A (Vishay) | Identical VRWM (60V), VC = 96.8V @ 4.1A, but rated for 1.5W steady-state power vs. 1.0W. | Better suited for higher ambient temperature environments (>75°C) due to improved thermal resistance. | Select when board-level thermal management limits junction temperature rise under continuous bias. |
| P6SMB60A (ON Semiconductor) | Same SMA package and VRWM, but lower peak pulse power (600W) and higher VC (100V @ 6A). | Higher clamping voltage reduces protection margin for 100V-rated downstream components. | Prefer only if surge energy exceeds 400W capability and system design tolerates 3.2V higher clamping. |
Compared with SMAJ60A-E3/5A and P6SMB60A, the SMAJ60A-13 offers tighter VBR tolerance (±5.5%), optimized for precision 60V rail clamping, whereas alternatives trade off clamping accuracy for thermal headroom or surge capacity.
Availability
SMAJ60A-13 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O protection, telecom DC feeder protection, and medical equipment power entry requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMAJ60A-13 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for robust, surface-mount overvoltage protection in automotive, industrial, and communications infrastructure applications.
FAQ
Is SMAJ60A-13 unidirectional or bidirectional?
SMAJ60A-13 is unidirectional, indicated by the absence of the "C" suffix in its part number. It conducts only when cathode voltage exceeds anode voltage by ≥66.7V, making it suitable for polarized DC lines. Bidirectional variants (e.g., SMAJ60CA-13) omit the polarity indicator and clamp symmetrically.
What is the maximum allowable mounting temperature during reflow?
The SMAJ60A-13 supports standard lead-free reflow profiles per JEDEC J-STD-020C Level 1, with peak temperature up to 260°C for ≤30 seconds. Its matte tin finish and glass-passivated die ensure no parametric shift or delamination under these conditions.
How does the 400W rating relate to real-world surge events?
The 400W rating corresponds to a single 8.3ms half-sine waveform at 25°C ambient. In practice, this translates to surviving ISO 7637-2 Pulse 5a (load dump) in 12V automotive systems, where peak current reaches ~4.1A at 96.8V clamped voltage, assuming proper PCB trace inductance and grounding.
Can SMAJ60A-13 replace SMAJ60CA-13 in a circuit?
No - SMAJ60A-13 is unidirectional and will not suppress negative-going transients. Replacing SMAJ60CA-13 (bidirectional) with SMAJ60A-13 risks failure on AC-coupled or floating signal lines. Only substitute if the application has strictly unidirectional voltage polarity and confirmed absence of reverse surges.
SMAJ60A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 4.1A
- 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
SMAJ60A-13 FAQ
1.How can I place an order for SMAJ60A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60A-13 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 SMAJ60A-13 reliable?
The price and inventory of SMAJ60A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60A-13 is usually 5 days.
3.What payment methods are accepted for SMAJ60A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60A-13?
SMAJ60A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60A-13 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 SMAJ60A-13?
For technical support, including SMAJ60A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60A-13 requirements.
6.How does Aetrix verify that SMAJ60A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ60A-13 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 SMAJ60A-13 meets industry standards.
7.What is the process for return or replacement of SMAJ60A-13?
All SMAJ60A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60A-13, 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 SMAJ60A-13 part is unused and in its original packaging.
Return procedure for SMAJ60A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ60A-13 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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