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Vishay General Semiconductor - Diodes Division SMAJ100CA-E3/5A
- Part No.:
- SMAJ100CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CA-E3/5A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,293
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Product details
Overview
SMAJ100CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 100 V standoff voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor protection, industrial I/O interfaces, and telecom line surge suppression.
For engineers reviewing the SMAJ100CA-E3/5A datasheet, SMAJ100CA-E3/5A pinout, SMAJ100CA-E3/5A application, or SMAJ100CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, UL 497B recognition, AEC-Q101 qualification eligibility (via HE3/HM3 variants), MSL Level 1 moisture sensitivity, and DO-214AC package compatibility with automated SMT placement.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports rapid energy dissipation during transient events.
The device complies with ANSI/IEEE C62.35 standards for surge suppressors and meets Underwriters Laboratory recognition QVGQ2 under UL 497B for protector classification. Thermal resistance is specified at RθJA = 120 °C/W (on 0.2" × 0.2" copper pads), and it is rated for continuous operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum steady-state reverse voltage before clamping begins; defines operating margin for protected circuitry. |
| VBR min/max | 111 V / 123 V at 1 mA - Confirmed breakdown range ensures reliable turn-on within spec across production lot. |
| VC @ IPPM | 162 V at 1.9 A - Clamping voltage limits downstream voltage stress during 10/1000 μs surge events. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; derates to 300 W above 78 V. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height. |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to line being protected. |
| Cathode | Transient current exit (bidirectional) | Completes clamping path to ground or return rail; identical electrical role as Anode. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles common lightning-induced surges and inductive switching spikes in industrial and automotive systems. |
| UL 497B recognized (QVGQ2) | Validated for telecom and data line protection applications requiring safety agency compliance. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage over temperature and lifetime. |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive-grade reliability validation in ADAS and body electronics. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground to limit transient overvoltage. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by clamping transients to ≤162 V while maintaining sub-μA leakage at 100 V DC bias. | Use Scenario: Safeguarding PLC digital input modules against 24 VDC line surges caused by relay coil de-energization or field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input stage, mounted directly at connector entry point. Use Value: Absorbs 400 W surge energy without degradation, preserving input logic thresholds and enabling >100,000 surge cycles per IEC 61000-4-5 Level 3. |
| Telecom Data Line Protection | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on MDI side of transformer, coordinated with primary GDT or MOV upstream. Use Value: Provides fast-response (sub-nanosecond) clamping to protect 100BASE-TX PHYs rated for ≤170 V absolute maximum, with <1.0 μA leakage preserving signal integrity. | Use Scenario: Input-stage surge suppression in wall-mounted AC-DC adapters for smart home devices subjected to mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across bridge rectifier output to clamp differential-mode surges before bulk capacitor. Use Value: Limits transient overshoot to 162 V, preventing overvoltage failure of 200 V-rated electrolytic capacitors and ensuring compliance with IEC 61000-4-5 Ed. 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA-E3/52 | Same VWM/VBR/VC specs but SMB (DO-214AA) package - 3.5 mm width vs. SMA's 4.5 mm; 600 W PPPM rating. | Higher power handling suits higher-energy surge environments; wider PCB footprint required. | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows larger pad area. |
| P6SMB100CA | Identical electrical specs and DO-214AA package; manufactured by ON Semiconductor; RoHS-compliant, no AEC-Q101 variant. | Lacks Vishay's UL 497B recognition and AEC-Q101 path; suitable for commercial/industrial only. | Choose for cost-sensitive non-automotive designs where agency certification is not mandated. |
Compared with SMAJ100CA-E3/5A, SMBJ100CA-E3/52 offers higher surge robustness in a slightly larger footprint, while P6SMB100CA provides functional equivalence without UL/AEC-Q101 support - making SMAJ100CA-E3/5A optimal for automotive-qualified or UL-mandated designs needing DO-214AC form factor.
Availability
SMAJ100CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom data line surge suppression requiring stable component supply and full traceability.
Supply support for SMAJ100CA-E3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-speed transient suppression in harsh environments including automotive, industrial control, and communications infrastructure.
FAQ
What is the clamping voltage of SMAJ100CA-E3/5A at its rated peak pulse current?
The SMAJ100CA-E3/5A has a maximum clamping voltage (VC) of 162 V at 1.9 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed per ANSI/IEEE C62.35 test conditions. The SMAJ100CA-E3/5A maintains this clamping performance across its qualified operating temperature range.
Is SMAJ100CA-E3/5A suitable for automotive applications?
SMAJ100CA-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3/HM3 ordering codes (e.g., SMAJ100CAHE3_A/I). The SMAJ100CA-E3/5A shares identical electrical and thermal specifications with those qualified variants, enabling direct design-in where qualification is pursued later. Its DO-214AC package and 150 °C TJ max also align with automotive under-hood requirements.
Does SMAJ100CA-E3/5A have polarity markings on the package?
No - SMAJ100CA-E3/5A is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMA (DO-214AC) case. Its symmetrical construction allows installation in either orientation without affecting clamping behavior. This simplifies PCB layout and eliminates risk of reverse installation errors common with unidirectional variants like SMAJ100A-E3/5A.
What is the maximum reverse leakage current for SMAJ100CA-E3/5A at its standoff voltage?
At its 100 V standoff voltage (VWM) and TA = 25 °C, the SMAJ100CA-E3/5A exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures minimal power loss and signal distortion in high-impedance circuits such as sensor bias networks or precision reference paths. Leakage remains below 5.0 μA up to +125 °C per datasheet derating curves.
Can SMAJ100CA-E3/5A be used in place of a unidirectional TVS like SMAJ100A-E3/5A?
SMAJ100CA-E3/5A can replace SMAJ100A-E3/5A only in circuits where bidirectional clamping is acceptable - such as AC signal lines, differential buses, or floating grounds. It must not be substituted in DC-biased unidirectional paths (e.g., 12 V supply rail to ground) without verifying that reverse conduction does not interfere with system operation. The SMAJ100CA-E3/5A's symmetrical VBR and VC characteristics differ fundamentally from the anode-grounded behavior of SMAJ100A-E3/5A.
SMAJ100CA-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 1.9A
- Power - Peak Pulse:
- 300W
- 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:
- DO-214AC (SMA)
SMAJ100CA-E3/5A FAQ
1.How can I place an order for SMAJ100CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CA-E3/5A 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-E3/5A reliable?
The price and inventory of SMAJ100CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CA-E3/5A?
SMAJ100CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CA-E3/5A 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-E3/5A?
For technical support, including SMAJ100CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ100CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100CA-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100CA-E3/5A?
All SMAJ100CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CA-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ100CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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