My Inquiry
My Account
Taiwan Semiconductor Corporation SA22C
- Part No.:
- SA22C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22C.pdf
- Description:
- 500W, 27.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,894
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA22C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 22V working stand-off voltage (VWM), 24.4–29.8V breakdown voltage (VBR @ 1mA), and 38.9V maximum clamping voltage (VC) at 13A peak pulse current - designed for automotive-grade ESD and lightning surge protection in power supply rails and signal lines.
For engineers reviewing the SA22C datasheet, SA22C pinout, SA22C application, or SA22C equivalent, this device delivers fast sub-nanosecond response (<1.0ps), low leakage (<1μA @ 22V), AEC-Q101 qualification (per SA22CH variant), and robust 175°C junction temperature rating - critical for under-hood automotive electronics, industrial DC power inputs, and LED driver transient immunity.
Technical Context
The SA22C operates as a unidirectional avalanche diode, clamping transients above its VBR threshold by entering controlled reverse breakdown. Its 22V VWM ensures compatibility with 24V nominal systems while maintaining margin against normal operating voltage excursions.
It sustains 500W peak pulse power per 10/1000μs waveform, with thermal derating above 25°C per Fig.2, and supports 70A non-repetitive forward surge (IFSM) - enabling use in inductive load switching circuits where back-EMF suppression is required without rectifier functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets system overvoltage trip margin for 24V automotive/bus applications. |
| VBR min / max | 24.4 V / 29.8 V @ 1 mA - Confirmed breakdown range defining turn-on threshold; ensures reliable clamping onset across production lot and temperature. |
| VC @ IPPM | 38.9 V @ 13 A - Clamping voltage during 10/1000μs surge; limits downstream IC stress to safe levels below typical 40V absolute max ratings. |
| PPK | 500 W - Peak pulse power handling capability; meets IEC 61000-4-5 Level 3 (1kV/2Ω) surge immunity requirements. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance sensing nodes. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot components (e.g., power MOSFETs, DC-DC inductors) in engine control units. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Cathode reference | Connected to system ground or low-side return path; defines polarity-sensitive clamping direction for unidirectional operation. |
| Cathode | Transient voltage clamp node | Connected to protected line (e.g., 24V rail); conducts surge current to ground when voltage exceeds VBR, limiting VC to 38.9V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | SA22CH variant available - validated for automotive under-hood temperature cycling, humidity bias, and mechanical shock per AEC standard. |
| Sub-picosecond response | <1.0 ps rise time from 0 V to VBR - faster than most silicon TVS devices, ensuring clamping before ESD or EFT pulses propagate into IC inputs. |
| Low clamping ratio | VC/VBR ≈ 1.45 (38.9V / 26.6V typ) - tight voltage margin between breakdown and clamping improves protection headroom versus competing 22V TVS diodes. |
| High surge robustness | 500W @ 10/1000μs + 70A IFSM - withstands repeated load dump surges (ISO 7637-2 Pulse 5a) and inductive kickback in solenoid drivers. |
Applications
| Automotive Power Rail Protection | Industrial DC Input Surge Suppression |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping surges within nanoseconds to prevent upstream regulator latch-up or damage. Use Value: With 38.9V clamping at 13A and 175°C rating, SA22C maintains protection integrity during sustained under-hood temperatures and repeated 100V/50ms transients. |
Use Scenario: Safeguarding programmable logic controller (PLC) 24V DC input modules against field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on DIN-rail mounted power supplies, absorbing energy before it reaches isolation amplifiers or microcontrollers. Use Value: 500W peak power rating and <1μA leakage ensure long-term reliability in always-on industrial systems without degrading baseline power efficiency. |
| LED Driver Output Protection | Automotive Sensor Signal Line Guarding |
Use Scenario: Shielding constant-current LED driver outputs from inductive flyback when driving high-power lighting arrays. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals to clamp reverse voltage spikes generated during MOSFET turn-off in buck or boost topologies. Use Value: Fast <1.0ps response and 70A IFSM rating allow SA22C to absorb repetitive 100ns–1μs spikes without degradation, extending LED module lifetime. |
Use Scenario: Protecting LIN bus or analog sensor inputs (e.g., temperature, pressure) in automotive body control modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed at connector interface, shunting ESD current to chassis ground before reaching LIN transceiver input pins. Use Value: Sub-1μA leakage at 22V prevents signal offset errors in precision 0–5V analog sensor paths, while AEC-Q101 compliance ensures qualification for automotive deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22A | Same DO-214AC package, 22V VWM, but bidirectional; clamping voltage 35.5V @ 13.3A; no AEC-Q101 option. | Requires polarity-insensitive layout; lower VC improves protection margin but lacks unidirectional leakage advantage. | Prefer SMAJ22A only if bidirectional clamping is needed (e.g., AC-coupled lines); otherwise SA22C offers superior leakage and automotive qualification path. |
| ON Semiconductor 1.5KE22A | DO-201AD package; higher PPK (1500W), but larger footprint and slower response (~1ns); VWM = 18.8V, VC = 33.2V @ 45.2A. | Over-specified for 24V systems; requires PCB rework due to different lead spacing and thermal pad area. | Select 1.5KE22A only for legacy designs requiring 1.5kW surge margin; SA22C provides better fit for space-constrained, thermally demanding automotive modules. |
Compared with SMAJ22A and 1.5KE22A, the SA22C delivers optimal balance of compact DO-15 form factor, AEC-Q101 readiness, ultra-low leakage, and precise 22V system alignment - making it the preferred choice for new 24V automotive and industrial designs where board space, thermal management, and qualification traceability are critical.
Availability
SA22C is available at Aetrix Electronics and suitable for automotive electronic control units, industrial PLC power inputs, and LED driver output protection requiring stable component supply and full traceability.
Supply support for SA22C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with ISO/TS 16949 certification and global distribution.
The SA Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, tight parameter distributions, and robust surge endurance in compact axial packages.
FAQ
What is the maximum clamping voltage of the SA22C under standard 10/1000μs surge conditions?
The SA22C has a maximum clamping voltage (VC) of 38.9 V at 13 A peak pulse current (IPPM), measured per 10/1000μs waveform. This value is guaranteed across the full operating temperature range and ensures protected circuitry remains below common 40V absolute maximum ratings, directly supporting IEC 61000-4-5 compliance testing.
Is the SA22C unidirectional or bidirectional, and how is polarity identified?
The SA22C is a unidirectional TVS diode, with cathode indicated by a band on the DO-204AC (DO-15) package body. Polarity must be observed during PCB placement: cathode connects to the protected line, anode to ground. Bidirectional variants in the SA series use "CA" suffix (e.g., SA22CA), not applicable to SA22C.
Does the SA22C meet AEC-Q101 qualification requirements?
The base SA22C is not AEC-Q101 qualified; however, the SA22CH variant - identical in electrical specs and DO-15 packaging - is fully AEC-Q101 qualified per Rev L2105 documentation. For automotive applications requiring qualification evidence, SA22CH must be specified and sourced accordingly.
What is the reverse leakage current of the SA22C at its rated working voltage?
The SA22C exhibits reverse leakage current (IR) of less than 1 μA at 22 V (VWM), tested at 25°C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on automotive modules - a key differentiator versus higher-leakage alternatives.
Can the SA22C be used in place of the SA22A variant?
No - SA22C and SA22A are distinct variants: SA22C is unidirectional with 22V VWM and 24.4–29.8V VBR, while SA22A is also unidirectional but features tighter VBR tolerance (24.4–26.9V) and higher temperature coefficient (25 mV/°C vs. 28 mV/°C). They are not interchangeable without verifying circuit margin against the respective VBR min/max and TC values.
SA22C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 13A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA22C FAQ
1.How can I place an order for SA22C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22C 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 SA22C reliable?
The price and inventory of SA22C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA22C is usually 5 days.
3.What payment methods are accepted for SA22C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22C?
SA22C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22C 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 SA22C?
For technical support, including SA22C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22C requirements.
6.How does Aetrix verify that SA22C is sourced from the original manufacturer or authorized distributors?
All SA22C 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 SA22C meets industry standards.
7.What is the process for return or replacement of SA22C?
All SA22C units undergo pre-shipment inspection (PSI). If there is an issue with SA22C, 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 SA22C part is unused and in its original packaging.
Return procedure for SA22C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA22C 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…
