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Diodes Incorporated SMAJ100CA-13
- Part No.:
- SMAJ100CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CA-13.pdf
- Description:
- TVS DIODE 100VWM 162VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,892
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Product details
Overview
SMAJ100CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for clamping ESD and surge transients on power and signal lines. It features a 100V reverse standoff voltage (VRWM), 111–123V breakdown range (VBR), 162V maximum clamping voltage (VC) at 2.5A peak pulse current (IPP), and operates from –55°C to +150°C - used in industrial power supply input protection and automotive body control modules.
For engineers reviewing the SMAJ100CA-13 datasheet, SMAJ100CA-13 pinout, SMAJ100CA-13 application, or SMAJ100CA-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, unidirectional/bi-directional polarity match, IEC 61000-4-2/4-5 compliance capability, and SMA package thermal derating under sustained surge duty cycles.
Technical Context
This bi-directional TVS diode uses glass-passivated junction construction for stable breakdown characteristics and fast response (<1 ps). Its symmetrical clamping behavior protects AC-coupled or floating lines without polarity dependency, and it meets JEDEC-standard 8.3ms half-sine surge testing at up to 40A peak forward surge current (IFSM).
The device exhibits low leakage (<5 µA at VRWM), defined clamping performance across temperature (–55°C to +150°C), and is rated for 400W non-repetitive peak pulse power with derating above 25°C ambient - validated per REA-defined waveform and R.E.A. test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single transient events per JEDEC 8.3ms half-sine without failure |
| Reverse Standoff Voltage | 100V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage Range | 111–123V @ IT = 1mA - defines guaranteed conduction onset window for design margining |
| Max Clamping Voltage | 162V @ IPP = 2.5A - limits voltage seen by downstream circuit during worst-case surge |
| Peak Pulse Current | 2.5A - maximum transient current the device clamps while staying within VC limit |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive and industrial ambient environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with standard reflow profiles and IPC-7351B land patterns |
Pinout & Package
Two-terminal SMA (DO-214AC) package with cathode band omitted (bi-directional configuration). Terminals are anode and cathode - electrically interchangeable due to symmetrical structure; no polarity-sensitive mounting required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either polarity) | Accepts surge current regardless of voltage polarity; connects to line being protected |
| Cathode | Transient current exit (either polarity) | Completes clamping path to reference plane; functionally identical to anode in bi-directional mode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR over time and temperature; eliminates passivation-related drift in harsh environments |
| Bi-directional symmetry | Enables protection of AC signals, differential buses, or floating rails without orientation constraints |
| RoHS-compliant matte tin plating | Supports lead-free reflow assembly (J-STD-020C Level 1 moisture sensitivity) without solderability degradation |
| UL 94V-0 molded case | Provides flame-retardant housing meeting safety standards for enclosed industrial and automotive enclosures |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input rail exposed to load dump and jump-start transients in PLC power supplies. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤162V, preventing damage to 36V-rated input capacitors and controller ICs. | Use Scenario: LIN bus physical layer interface subjected to ISO 16750-2 pulse 5a/b surges. IC Role / Device Role / Timing Role: Bi-directional line protector between transceiver and vehicle harness. Use Value: Maintains signal integrity by clamping both positive and negative transients without polarity bias. |
| Telecom AC-DC Adapter Output | Smart Meter Communication Port |
Use Scenario: Secondary-side 12V output of isolated AC-DC adapter vulnerable to conducted surges. IC Role / Device Role / Timing Role: Secondary-side TVS placed after transformer and rectifier, before post-regulation. Use Value: Absorbs 400W pulses without latch-up, preserving output regulation and downstream microcontroller operation. | Use Scenario: RS-485 port on utility smart meter exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Common-mode surge clamp across A/B lines referenced to chassis ground. Use Value: Symmetrical clamping ensures equal voltage limiting on both differential lines, avoiding receiver offset errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA-13 | 600W peak pulse power, same VRWM/VC but higher IPP (3.7A), larger SMB package | Better suited for higher-energy surges; requires larger PCB area and different thermal layout | Select when system-level surge tests exceed IEC 61000-4-5 Level 4 (4kV/2Ω) |
| SMCJ100CA-13 | 1500W peak pulse power, same VRWM/VC, IPP = 10.4A, SMC package | Used where long-duration transients dominate; incompatible with SMA footprint | Choose for heavy-duty industrial motor drives or solar inverter DC-link protection |
Compared with SMBJ100CA-13 and SMCJ100CA-13, SMAJ100CA-13 offers optimal balance of surge robustness, compact size, and thermal performance for space-constrained 24–48V systems requiring certified Level 3 immunity.
Availability
SMAJ100CA-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom AC-DC adapter outputs, and smart meter communication ports requiring stable component supply across multi-year production cycles.
Supply support for SMAJ100CA-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, manufacturing, and sales operations across Asia, Europe, and North America.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability board-level surge and ESD protection in automotive, industrial, and communications equipment.
FAQ
What is the difference between SMAJ100CA-13 and SMAJ100A-13?
SMAJ100CA-13 is bi-directional (denoted by "C"), providing symmetrical clamping for AC or floating lines; SMAJ100A-13 is unidirectional, with a cathode band and only clamps positive transients relative to ground. Their VRWM, VBR, and VC values differ slightly due to internal structure - bi-directional units have dual-junction construction.
Can SMAJ100CA-13 be used in place of a unidirectional TVS in a DC circuit?
Yes, but with trade-offs: it will protect against both polarities, which is unnecessary in grounded DC systems and may increase junction capacitance (~100 pF at 0 V) versus unidirectional variants (~65 pF). No electrical harm occurs, but layout and noise filtering may require reassessment.
What is the maximum allowable PCB trace length between SMAJ100CA-13 and the protected node?
For effective clamping, keep trace inductance below 10 nH - typically achieved with ≤5 mm straight trace length and direct connection to ground plane via multiple vias. Longer traces add impedance that degrades clamping speed and allows voltage overshoot beyond VC during fast transients.
Does SMAJ100CA-13 meet IEC 61000-4-5 surge immunity requirements?
Yes - its 400W rating corresponds to IEC 61000-4-5 Level 3 (1kV line-earth, 2Ω source impedance) when applied with proper PCB layout and grounding. For Level 4 (2kV or 4kV), higher-power variants like SMBJ100CA-13 or SMCJ100CA-13 are recommended.
SMAJ100CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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
SMAJ100CA-13 FAQ
1.How can I place an order for SMAJ100CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CA-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 SMAJ100CA-13 reliable?
The price and inventory of SMAJ100CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CA-13 is usually 5 days.
3.What payment methods are accepted for SMAJ100CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CA-13?
SMAJ100CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CA-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 SMAJ100CA-13?
For technical support, including SMAJ100CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CA-13 requirements.
6.How does Aetrix verify that SMAJ100CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ100CA-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 SMAJ100CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ100CA-13?
All SMAJ100CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CA-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 SMAJ100CA-13 part is unused and in its original packaging.
Return procedure for SMAJ100CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100CA-13 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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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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