My Inquiry
My Account
onsemi SA100A
- Part No.:
- SA100A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA100A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:6,710
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA100A from Fairchild Semiconductor is a unidirectional 500 W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 100 V reverse stand-off voltage (VRWM), 111–123 V breakdown voltage (VBR) at 1.0 mA, 162 V clamping voltage (VC) at 3.1 A peak pulse current (IPPM), and operates up to +175 °C junction temperature.
For engineers reviewing the SA100A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 10/1000 µs surge, low leakage (<3.1 µA at VRWM), fast response time (<1.0 ps), DO-15 package compatibility, and suitability for industrial power supply input stages, telecom line cards, and automotive body control modules.
Technical Context
The SA100A employs a glass-passivated silicon junction optimized for high-energy transient suppression on 10/1000 µs waveforms. Its unidirectional architecture provides asymmetric conduction-low forward voltage drop during normal operation and rapid avalanche breakdown above VBR to clamp surges.
Clamping behavior is characterized by low incremental surge resistance and stable VC across rated IPPM. Thermal design relies on 1.0 W steady-state dissipation at 75 °C ambient with 0.375" lead length, and junction temperature is limited to +175 °C for long-term reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 500 W - sustains single high-energy transients per IEC 61000-4-5 Level 4 without degradation |
| Reverse Stand-off Voltage (VRWM) | 100 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 111–123 V at 1.0 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| Clamping Voltage (VC) | 162 V at IPPM = 3.1 A - limits protected circuit voltage during worst-case surge event |
| Reverse Leakage (IR) | <3.1 µA at 100 V - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| Junction Temperature (TJ) | +175 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| Package | DO-15 - industry-standard axial-leaded package with cathode band marking, compatible with through-hole assembly and manual repair |
Pinout & Package
SA100A uses the DO-15 package: axial-leaded, glass-passivated, with cathode indicated by a color band on the unidirectional device. Lead length is standardized at 0.375" for thermal rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / surge return path | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Avalanche clamping node / protected line connection | Connected to the line being protected (e.g., +12 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low IR over temperature and lifetime; resists moisture ingress and surface contamination |
| 500 W peak pulse rating (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment |
| Fast response time <1.0 ps | Clamps transients before downstream ICs experience overstress-critical for protecting sensitive microcontrollers and interface ICs |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping accuracy and system margin |
| Steady-state power dissipation: 1.0 W @ 75 °C | Supports reliable operation in enclosed enclosures without forced airflow or heatsinking |
Applications
| Industrial Power Supply Input | Automotive Body Control Module |
|---|---|
Use Scenario: Protection of 24 V DC input stage against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping device placed directly at connector entry point before EMI filter and DC/DC converter. Use Value: Clamps 120 V/300 ms load dump to ≤162 V, preventing damage to upstream rectifiers and downstream regulators. |
Use Scenario: Surge protection on LIN bus or sensor supply lines exposed to battery transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBAT and GND, with cathode tied to VBAT. Use Value: Withstands repeated 100 V/40 ms pulses while maintaining <3.1 µA leakage at nominal 12 V, preserving sleep-mode current budget. |
| Telecom Line Card Interface | Programmable Logic Controller I/O |
Use Scenario: DC feed protection on analog/digital signal lines entering central office equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after series impedance to limit fault current during lightning-induced surges. Use Value: 100 V VRWM allows compatibility with -48 V telecom systems; 162 V VC prevents latch-up in op-amps and ADC drivers. |
Use Scenario: Protection of 24 V digital input channels against field-wiring induced transients. IC Role / Device Role / Timing Role: Discrete TVS mounted adjacent to terminal block, shunting surge energy to chassis ground. Use Value: 500 W rating handles multiple 1 kV/500 A surges per IEC 61000-4-4; DO-15 form factor supports automated through-hole placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A | Same VRWM (100 V) and VC (162 V), but in SMB (DO-214AA) surface-mount package; 600 W peak pulse rating | Requires PCB redesign for SMT layout; better suited for space-constrained, high-volume production | Select when board area is limited and reflow assembly is available; verify thermal pad design for 1.0 W dissipation |
| P6KE100A | Same DO-15 package and unidirectional function, but lower 600 W peak pulse rating and higher VC (165 V at 3.1 A) | Marginally higher clamping voltage reduces protection margin for 3.3 V or 5 V logic rails downstream | Acceptable for legacy designs where P6KE100A is already qualified; not recommended for new designs requiring tight VC tolerance |
Compared with SA100A, SMBJ100A offers higher surge rating and SMT compatibility at the cost of layout change, while P6KE100A retains DO-15 fit but sacrifices clamping precision and long-term surge endurance-making SA100A the optimal balance of proven reliability, thermal robustness, and through-hole manufacturability.
Availability
SA100A is available at Aetrix Electronics and suitable for industrial power supply input stages, automotive body control modules, and telecom line card interfaces requiring stable component supply, long-lifecycle support, and traceable sourcing from authorized channels.
Supply support for SA100A 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
Fairchild Semiconductor was a leading designer and manufacturer of high-performance analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed and supported.
The SAxxxA series was engineered specifically for robust, cost-effective transient protection in harsh DC power environments-emphasizing stable clamping, high surge endurance, and DO-15 manufacturability for industrial and transportation applications.
FAQ
What is the maximum clamping voltage of SA100A under standard test conditions?
The SA100A has a maximum clamping voltage (VC) of 162 V when subjected to its rated peak pulse current of 3.1 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage seen by downstream circuitry during a defined surge event. The SA100A maintains this clamping performance consistently across its operating temperature range, making it suitable for applications where voltage margin is critical.
Is SA100A bidirectional or unidirectional?
The SA100A is a unidirectional transient voltage suppressor, indicated by the absence of the "C" suffix (which denotes bidirectional variants like SA100CA). It conducts only in reverse breakdown-cathode to anode-and blocks forward current like a standard diode. This makes SA100A appropriate for DC line protection where polarity is fixed, unlike AC or differential bus applications requiring bidirectional clamping.
What package type does SA100A use, and how is polarity marked?
The SA100A uses the DO-15 axial-leaded package. Polarity is marked by a visible color band (typically black or dark gray) located near the cathode end of the device body. During PCB layout or manual assembly, the banded end must be connected to the line being protected (e.g., +24 V), while the unbanded (anode) end connects to ground or return. This marking is consistent across all unidirectional SAxxx A-series devices.
Can SA100A replace SA100CA in a bidirectional circuit?
No, SA100A cannot replace SA100CA in a bidirectional circuit. SA100CA is symmetrically rated for clamping in both directions and lacks a polarity band, whereas SA100A is unidirectional and will conduct heavily in forward bias if reverse-connected. Substituting SA100A for SA100CA risks catastrophic failure due to forward conduction during negative transients. Always match device directionality to circuit topology.
What is the reverse leakage current specification for SA100A at its rated VRWM?
The SA100A specifies a maximum reverse leakage current (IR) of 3.1 µA at its reverse stand-off voltage (VRWM) of 100 V and TA = 25 °C. This low leakage ensures minimal power loss and signal interference in high-impedance circuits such as sensor inputs or microcontroller wake-up lines. Leakage remains well below 10 µA across the full operating temperature range, supporting reliable operation in battery-powered or energy-sensitive systems.
SA100A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
SA100A FAQ
1.How can I place an order for SA100A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA100A 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 SA100A reliable?
The price and inventory of SA100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA100A is usually 5 days.
3.What payment methods are accepted for SA100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA100A?
SA100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA100A 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 SA100A?
For technical support, including SA100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA100A requirements.
6.How does Aetrix verify that SA100A is sourced from the original manufacturer or authorized distributors?
All SA100A 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 SA100A meets industry standards.
7.What is the process for return or replacement of SA100A?
All SA100A units undergo pre-shipment inspection (PSI). If there is an issue with SA100A, 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 SA100A part is unused and in its original packaging.
Return procedure for SA100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA100A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
