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onsemi SA16AG
- Part No.:
- SA16AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA16AG.pdf
- Description:
- TVS DIODE 16VWM 26VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,036
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Product details
Overview
SA16AG from ON Semiconductor is a unidirectional MiniMOSORB Zener transient voltage suppressor (TVS) designed for clamping high-energy transients in DC power rails and signal lines. It features a 16 V working peak reverse voltage (VRWM), 26 V maximum clamping voltage at 19.2 A peak pulse current, 500 W peak pulse power rating (1 ms), <1.0 ns response time, and UL 497B recognition for isolated loop circuit protection.
For engineers reviewing the SA16AG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, clamping voltage vs. protected device's absolute maximum rating, surge current capability under IEC 61000-4-5 waveforms, and axial leaded Surmetic package compatibility with through-hole PCB layouts.
Technical Context
The SA16AG operates as a voltage-clamping device that remains high-impedance below VRWM (16 V) and rapidly avalanches above its breakdown voltage (17.8–19.7 V at 1 mA) to limit transient overvoltage. Its low zener impedance and fast sub-nanosecond response ensure effective suppression of ESD (Class 3, >16 kV HBM) and lightning-induced surges.
It is rated for 500 W nonrepetitive peak pulse power per 1 ms waveform (Figure 4), with thermal derating above 25°C ambient and junction-to-lead thermal resistance of 33.3°C/W. The device is Pb-free, housed in axial leaded CASE 59AA plastic package with cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC bias by ≥10%. |
| VBR (min/typ/max) | 17.8 / 18.75 / 19.7 V @ 1 mA - Confirmed avalanche onset range; determines minimum clamping threshold. |
| VC @ IPP | 26 V @ 19.2 A - Maximum clamped voltage during 1 ms surge; must stay below protected IC's absolute max rating. |
| IPP | 19.2 A - Peak pulse current supported at rated clamping voltage; correlates to IEC 61000-4-5 Level 4 immunity. |
| PPK | 500 W @ 1 ms - Surge energy handling capacity; defines transient robustness without thermal runaway. |
| Response time | <1.0 ns - Enables suppression of fast-rising ESD events before downstream components experience overstress. |
| Leakage current | <1 μA @ VRWM - Negligible standby power loss; suitable for battery-backed or low-power monitoring circuits. |
Pinout & Package
SA16AG uses an axial-leaded Surmetic plastic package (CASE 59AA), with cathode identified by a colored band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential rail; forms return path during clamping conduction. |
| Cathode | High-side transient input | Connected to protected line (e.g., +12 V rail); avalanche conduction occurs from cathode to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection-enables compliance in telecom and industrial control safety certifications. |
| ESD Rating Class 3 | Withstands >16 kV human body model discharge-meets IEC 61000-4-2 Level 4 without external shielding. |
| Low Clamping Ratio | VC/VRWM = 26/16 = 1.625-tighter than typical TVS diodes (often >1.8), minimizing stress on downstream ICs. |
| Pb-Free Surmetic Package | RoHS-compliant axial lead construction with corrosion-resistant finish-supports automated through-hole assembly and long-term reliability. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment Signal Line Guarding |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between +24 V and GND, triggered only on overvoltage events. Use Value: Limits transients to ≤26 V, protecting downstream DC-DC converters and microcontrollers rated for 30 V absolute max. | Use Scenario: Analog sensor interface (e.g., thermocouple amplifier) in portable ultrasound device subjected to ESD during probe handling. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential analog input lines referenced to chassis ground. Use Value: Sub-ns response prevents ESD-induced latch-up in precision op-amps; <1 μA leakage avoids DC offset errors. |
| Telecom Line Interface Protection | Automotive Body Control Module (BCM) Power Rail |
Use Scenario: RS-485 data line in building automation gateway connected to long outdoor cabling susceptible to induced lightning surges. IC Role / Device Role / Timing Role: Primary clamping element on bus side of isolation barrier, coordinated with secondary-side TVS. Use Value: UL 497B certification validates suitability for isolated communication ports; 500 W rating handles multi-kA surge currents. | Use Scenario: 12 V battery-supplied power rail in BCM exposed to ISO 7637-2 pulse 1 (inductive load dump) and pulse 3a/b (switching noise). IC Role / Device Role / Timing Role: Front-end TVS on main power entry, placed before fuse and upstream of LDO regulators. Use Value: 19.2 A IPP and 26 V VC ensure clamp level stays within 12 V system's 36 V automotive IC tolerance window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Same VRWM (16 V), but SMC package (surface-mount); lower PPK (400 W); higher VC (26.5 V @ 15.3 A). | Requires rework for SMT layout; less robust for high-energy surges; better for space-constrained designs. | Choose SMAJ16A only if board real estate is critical and surge threat level is limited to IEC 61000-4-2 ESD. |
| P6KE16A | Same axial package (DO-15), identical VRWM (16 V), but lower PPK (600 W), higher VC (27.7 V @ 21.7 A), and no UL 497B listing. | Acceptable for non-certified industrial use; lacks regulatory validation for medical/telecom safety-critical paths. | Select P6KE16A where cost is primary and UL recognition is not required; verify clamping margin with protected IC specs. |
Compared with SMAJ16A and P6KE16A, the SA16AG offers superior regulatory alignment (UL 497B), tighter clamping (26 V), and proven suitability for high-reliability industrial and medical systems-making it the preferred choice when certification and precise voltage limiting are mandatory.
Availability
SA16AG is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, telecom infrastructure interfaces, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SA16AG 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
ON Semiconductor (now onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, cloud, and IoT applications.
The SA16AG belongs to the SA5.0A Series MiniMOSORB TVS family-engineered specifically for high-surge, low-clamping protection in harsh electromagnetic environments across industrial control, medical instrumentation, and communications infrastructure.
FAQ
What is the maximum clamping voltage of the SA16AG under surge conditions?
The SA16AG has a maximum clamping voltage (VC) of 26 V when subjected to its rated peak pulse current of 19.2 A (per 1 ms waveform). This value is measured under standardized test conditions defined in the ON Semiconductor datasheet and ensures predictable overvoltage limiting for downstream components. Designers must confirm this clamping level remains safely below the absolute maximum voltage rating of the protected circuitry. The SA16AG consistently achieves this performance across its qualified temperature range.
Does the SA16AG meet UL 497B requirements for isolated loop protection?
Yes, the SA16AG is explicitly included in ON Semiconductor's UL 497B recognition under File #E210057 for protector classification (QVGQ2). This certification covers surge endurance, dielectric withstand, and strike voltage breakdown testing-validating its use in safety-critical isolated interfaces such as telecom line cards and medical sensor front-ends. The SA16AG's listing applies directly to its SA5.0A Series qualification, not as a derivative or variant.
What is the polarity configuration and physical marking of the SA16AG?
The SA16AG is a unidirectional TVS diode with cathode indicated by a visible polarity band on the axial Surmetic package body. The banded end is the cathode terminal and must be connected toward the higher-potential side of the protected line (e.g., +16 V rail), while the unbanded end (anode) connects to ground or reference. This orientation ensures proper avalanche conduction during overvoltage events. The device marking "SA16A" appears adjacent to the band per the datasheet marking diagram.
How does the SA16AG's surge current rating compare to similar 16 V TVS diodes?
The SA16AG supports 19.2 A peak pulse current (IPP) at its 26 V clamping voltage, which is higher than many competing 16 V TVS devices in axial packages-for example, the P6KE16A specifies 21.7 A but at a higher clamping voltage (27.7 V). The SA16AG's combination of 19.2 A IPP and 26 V VC delivers a more favorable clamping ratio (1.625), reducing stress on protected ICs. Its 500 W peak power rating further confirms robust surge handling capability per standard 1 ms waveform.
Is the SA16AG suitable for automotive applications subject to ISO 7637-2 pulses?
The SA16AG is commonly deployed in automotive body control modules for protection against ISO 7637-2 Pulse 1 (load dump) and Pulse 3a/b (switching transients), provided system-level analysis confirms its clamping voltage (26 V) and energy absorption (500 W) meet the specific threat profile. While not AEC-Q200 qualified itself, its electrical performance and axial package ruggedness align with Tier 1 supplier design practices for non-safety-critical 12 V rail protection. Always validate with actual pulse testing per vehicle OEM requirements.
SA16AG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- MiniMosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 19.2A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
SA16AG FAQ
1.How can I place an order for SA16AG through Aetrix?
Please submit a Request for Quotation (RFQ) for SA16AG 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 SA16AG reliable?
The price and inventory of SA16AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA16AG is usually 5 days.
3.What payment methods are accepted for SA16AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA16AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA16AG?
SA16AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA16AG 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 SA16AG?
For technical support, including SA16AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA16AG requirements.
6.How does Aetrix verify that SA16AG is sourced from the original manufacturer or authorized distributors?
All SA16AG 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 SA16AG meets industry standards.
7.What is the process for return or replacement of SA16AG?
All SA16AG units undergo pre-shipment inspection (PSI). If there is an issue with SA16AG, 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 SA16AG part is unused and in its original packaging.
Return procedure for SA16AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA16AG Tags
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