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Diodes Incorporated SMAJ64A-13-F
- Part No.:
- SMAJ64A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64A-13-F.pdf
- Description:
- TVS DIODE 64VWM 103VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,329
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Product details
Overview
SMAJ64A-13-F 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 64V reverse standoff voltage (VRWM), 71.1–78.6V breakdown voltage (VBR) at 1mA, 103V max clamping voltage (VC) at 3.9A peak pulse current (IPP), and SMA package with cathode band polarity indicator.
For engineers reviewing the SMAJ64A-13-F datasheet, SMAJ64A-13-F pinout, SMAJ64A-13-F application, or SMAJ64A-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM ≈ 1.61), low leakage (<5µA @ 64V), fast response time (<1ps), and compatibility with IEC 61000-4-2 Level 4 ESD protection in automotive body electronics and industrial control inputs.
Technical Context
This TVS operates as a clamping device in parallel with protected circuitry, conducting only when transient voltage exceeds VRWM. Its glass-passivated junction ensures stable VBR and low leakage across -55°C to +150°C operating range, with thermal derating applied above +25°C ambient per Fig. 1.
The device uses a single P-N junction structure optimized for high-energy 8.3ms half-sine surge suppression (400W peak, 40A IFSM). Its unidirectional configuration provides forward conduction path during negative transients, while reverse-biased operation clamps positive surges - requiring correct orientation relative to DC rail polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains 8.3ms half-sine surge without failure under defined test conditions |
| Reverse Standoff Voltage | 64V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 71.1–78.6V @ 1mA - precise VBR window ensures reliable triggering margin above VRWM |
| Clamping Voltage | 103V @ 3.9A IPP - limits transient voltage seen by downstream ICs to safe level |
| Leakage Current | <5µA @ 64V - negligible standby power loss and minimal impact on high-impedance circuits |
| Package | SMA - standardized surface-mount outline (4.0–4.6mm length, 2.29–2.92mm width) with JEDEC-compliant pad layout |
Pinout & Package
Two-terminal SMA package: anode and cathode terminals aligned along body axis, with molded cathode band marking polarity for unidirectional operation. No internal connection complexity - direct series placement in line with protected node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; defines conduction direction during negative transients |
| Cathode | High-side surge input terminal | Connected to protected line; conducts when line voltage exceeds VRWM + VBR threshold |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| UL 94V-0 mold compound | Provides flame-retardant housing compliant with safety standards for enclosed industrial equipment |
| Moisture sensitivity Level 1 | Eliminates need for dry-packaging or bake-out prior to reflow soldering |
| Lead-free matte tin plating | Enables RoHS-compliant assembly with standard SnPb or lead-free solder profiles |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting LIN bus interface pins against load dump and inductive switching transients in door module ECUs. IC Role / Device Role: Primary clamping element placed between LIN transceiver supply pin and chassis ground. Use Value: Limits transient voltage to ≤103V, preventing damage to 12V-rated transceivers while maintaining <5µA leakage at nominal 12V supply. | Use Scenario: Safeguarding 24V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role: Front-end TVS on optocoupler input side, shunting energy before current-limiting resistor. Use Value: Clamps 400W surges to 103V within nanoseconds, preserving optocoupler CTR and enabling robust 24V ±10% operation. |
| DC Power Supply Input Stage | Telecom Line Interface Protection |
Use Scenario: Secondary overvoltage protection on 48V telecom power distribution boards after primary MOV stage. IC Role / Device Role: Fast-response clamp limiting residual overshoot from MOV let-through energy. Use Value: Responds in <1ps to suppress sub-microsecond spikes, reducing risk of MOSFET gate oxide failure in downstream DC-DC converters. | Use Scenario: Protecting RS-485 transceiver data lines from ESD and lightning-induced surges in outdoor base station cabinets. IC Role / Device Role: Unidirectional TVS on A/B differential pair, referenced to local ground plane. Use Value: Maintains signal integrity with <0.5pF typical junction capacitance at 0V bias, avoiding data rate degradation up to 25Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA-13-F | Bidirectional version; symmetric clamping for AC-coupled or floating lines | Required where bidirectional transients occur (e.g., antenna ports, transformer-isolated interfaces) | Select only if line lacks fixed DC bias or requires symmetrical surge handling |
| SMBJ64A-13-F | Same electrical specs but SMB package (higher PM(AV) = 1.5W, larger footprint) | Better thermal performance in high-ambient or high-duty-cycle surge environments | Choose when board space allows and steady-state power dissipation exceeds 1.0W limit of SMA |
Compared with SMAJ64CA-13-F, this unidirectional variant offers tighter clamping ratio and lower cost for DC-biased rails; versus SMBJ64A-13-F, it trades thermal margin for compactness - optimal for space-constrained 24V/48V industrial modules with infrequent surge exposure.
Availability
SMAJ64A-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, DC power supply protection, and telecom line interface applications requiring stable component supply and full traceability.
Supply support for SMAJ64A-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and product qualification to AEC-Q101 for automotive-grade components.
The SMAJ series targets cost-sensitive, high-reliability transient suppression in automotive and industrial systems, emphasizing robustness under thermal cycling, humidity, and repetitive surge stress - not just single-event rating compliance.
FAQ
What is the maximum clamping voltage for SMAJ64A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 103V at 3.9A peak pulse current (IPP), measured using the 8.3ms half-sine waveform per IEC 61000-4-5. This value represents the upper bound of voltage imposed on protected circuitry during worst-case surge events, ensuring downstream components rated for ≥103V withstand stress.
Does SMAJ64A-13-F meet automotive qualification standards?
SMAJ64A-13-F is not AEC-Q101 qualified; however, Diodes offers the pin-compatible SMAJ64AQ-13-F variant specifically qualified to AEC-Q101, PPAP-capable, and manufactured in IATF 16949-certified facilities. The standard part is suitable for non-safety-critical automotive applications where qualification is not mandated.
How does the SMA package affect thermal performance in continuous operation?
With a steady-state power dissipation limit of 1.0W at TL = +75°C and thermal derating above that temperature (Fig. 6), the SMA package requires careful PCB copper area design. Minimum recommended pad size is 2.5×6.5mm per terminal with internal ground plane connection to maintain junction temperature below +150°C under sustained 1W load.
Can SMAJ64A-13-F be used for bidirectional signal line protection?
No - SMAJ64A-13-F is unidirectional and will conduct continuously if reverse-biased beyond its forward voltage (~3.5V at 35A). For bidirectional protection (e.g., RS-485, USB, antenna lines), use SMAJ64CA-13-F, which has identical clamping specs but symmetric breakdown in both directions.
SMAJ64A-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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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
SMAJ64A-13-F FAQ
1.How can I place an order for SMAJ64A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64A-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 SMAJ64A-13-F reliable?
The price and inventory of SMAJ64A-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 SMAJ64A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ64A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64A-13-F?
SMAJ64A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64A-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 SMAJ64A-13-F?
For technical support, including SMAJ64A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64A-13-F requirements.
6.How does Aetrix verify that SMAJ64A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ64A-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 SMAJ64A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ64A-13-F?
All SMAJ64A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64A-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 SMAJ64A-13-F part is unused and in its original packaging.
Return procedure for SMAJ64A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ64A-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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