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Vishay General Semiconductor - Diodes Division SMAJ100CA-M3/5A
- Part No.:
- SMAJ100CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CA-M3/5A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ100CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 100 V stand-off voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ100CA-M3/5A datasheet, SMAJ100CA-M3/5A pinout, SMAJ100CA-M3/5A application, or SMAJ100CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, 162 V VC under 1.9 A surge, halogen-free RoHS-compliant construction (M3 suffix), AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding to transient overvoltages within picoseconds. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints.
Rated for 400 W peak pulse power (derated to 300 W above 78 V), it sustains repetitive surges at 0.01% duty cycle and handles up to 40 A non-repetitive forward surge (IFSM) in unidirectional mode - though SMAJ100CA is bidirectional and thus not rated for IFSM conduction. Junction temperature range spans −55 °C to +150 °C with thermal resistance RθJA = 120 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VBR min/max | 111 V / 123 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above system operating voltage. |
| VC @ IPPM | 162 V at 1.9 A - Clamped voltage during 10/1000 μs transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W (10/1000 μs) - Peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity designs. |
| ID @ VWM | 1.0 μA - Reverse leakage at stand-off voltage; low value minimizes standby power loss and avoids false triggering. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint; supports JEDEC-compliant reflow and J-STD-002 solderability. |
| Construction | Halogen-free, RoHS-compliant (M3 suffix) - Meets environmental compliance requirements for commercial and automotive supply chains. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive transients relative to cathode reference. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative transients - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and inductive switching spikes in 12 V/24 V automotive and industrial bus lines. |
| Bidirectional clamping symmetry | Eliminates need for polarity-aware PCB routing; simplifies design for AC-coupled or floating signal lines such as CAN, LIN, or sensor differential pairs. |
| 162 V clamping voltage at 1.9 A | Provides defined overvoltage ceiling for 100 V nominal systems, ensuring protected ICs (e.g., gate drivers, ADC front-ends) remain below absolute maximum ratings. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualification path | Base P/NHM3_X variant available for automotive applications - confirms reliability for under-hood and ADAS subsystems requiring extended temperature and lifetime validation. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V battery rail in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transients to ≤162 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic supplies derived from the protected rail. |
Use Scenario: Analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 4–20 mA or 0–10 V analog outputs. Use Value: Sub-μA leakage at 100 V ensures minimal impact on measurement accuracy while clamping ESD events per IEC 61000-4-2. |
| Telecom DC Power Feeds | Consumer Device USB/Power Port Protection |
|
Use Scenario: −48 V telecom central office power distribution boards subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary-level TVS on feed lines entering line cards and interface modules. Use Value: Bidirectional response accommodates both positive and negative polarity surges common in telecom grounding architectures. |
Use Scenario: 5 V USB VBUS input on smart home hubs exposed to user-handling ESD and hot-plug transients. IC Role / Device Role / Timing Role: First-line transient suppressor before polyfuse and USB controller. Use Value: Fast response time and 162 V clamping prevent damage to USB PHY transceivers rated for 6 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-M3/5A | Unidirectional version; cathode band marked; 162 V VC same, but conducts only in one polarity. | Requires correct polarity orientation on PCB; unsuitable for AC or floating lines. | Select when protecting DC rails with known polarity and space-constrained layouts needing lowest possible capacitance. |
| SMBJ100CA-M3/5A | Same VWM/VC specs but in SMB (DO-214AA) package; 600 W PPPM rating; larger 4.57 mm × 3.94 mm footprint. | Higher power handling enables longer surge duration tolerance; requires larger pad area. | Choose for higher-energy threat environments (e.g., industrial motor drives) where 600 W margin justifies added board space. |
Compared with SMAJ100CA-M3/5A, the unidirectional SMAJ100A-M3/5A demands strict polarity alignment but offers identical clamping performance in DC-only paths, while SMBJ100CA-M3/5A trades compactness for 50 % higher surge power headroom - guiding selection based on layout constraints versus threat severity.
Availability
SMAJ100CA-M3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power feeds, and consumer USB port protection requiring stable component supply across production lifecycles.
Supply support for SMAJ100CA-M3/5A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting design-in for automotive, industrial, and telecom infrastructure where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMAJ100CA-M3/5A at its rated peak pulse current?
The SMAJ100CA-M3/5A has a maximum clamping voltage (VC) of 162 V when subjected to its specified peak pulse current (IPPM) of 1.9 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ100CA-M3/5A maintains this clamping performance bidirectionally due to its symmetrical junction structure.
Is SMAJ100CA-M3/5A suitable for automotive applications?
Yes - the SMAJ100CA-M3/5A base part is qualified per AEC-Q101 when ordered with the HM3_X suffix (e.g., SMAJ100CAHM3_A), confirming reliability for under-hood and chassis-mounted automotive electronics. The M3 suffix itself denotes halogen-free, RoHS-compliant construction meeting commercial-grade thermal and mechanical requirements. The SMAJ100CA-M3/5A operates across −55 °C to +150 °C and supports reflow up to 260 °C, aligning with automotive manufacturing standards.
How does SMAJ100CA-M3/5A differ from SMAJ100A-M3/5A?
SMAJ100CA-M3/5A is bidirectional with no polarity marking, enabling use on AC or floating lines, whereas SMAJ100A-M3/5A is unidirectional and features a cathode band for orientation-dependent placement. Both share identical VWM (100 V), VBR (111–123 V), and VC (162 V) specifications, but the unidirectional version conducts only during reverse-biased transients. The SMAJ100CA-M3/5A eliminates risk of incorrect installation in symmetric circuits like CAN bus or differential sensor outputs.
What is the thermal resistance of SMAJ100CA-M3/5A, and how does it affect power derating?
The SMAJ100CA-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. This value directly governs power derating: at ambient temperatures above 25 °C, the 3.3 W steady-state power dissipation (PD) must be reduced linearly per Figure 2 in Vishay document 88390. For example, at TA = 75 °C, usable PD drops to approximately 1.65 W. The SMAJ100CA-M3/5A's RθJA informs heatsinking decisions in high-duty-cycle surge environments.
Does SMAJ100CA-M3/5A require special PCB layout considerations?
Yes - Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W peak pulse power. Smaller pads reduce heat dissipation and cause premature failure under surge conditions. No polarity marking means layout can omit orientation silkscreen, but trace width and ground plane coupling should minimize inductance to preserve sub-nanosecond response. The SMAJ100CA-M3/5A's DO-214AC outline requires exact IPC-7351B compliant land pattern for reliable reflow yield.
SMAJ100CA-M3/5A 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-M3/5A FAQ
1.How can I place an order for SMAJ100CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CA-M3/5A 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-M3/5A reliable?
The price and inventory of SMAJ100CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CA-M3/5A?
SMAJ100CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CA-M3/5A 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-M3/5A?
For technical support, including SMAJ100CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ100CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100CA-M3/5A 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-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100CA-M3/5A?
All SMAJ100CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CA-M3/5A, 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-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ100CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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