My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA26HE3/73
- Part No.:
- SA26HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26HE3/73.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA26HE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 42.1 V maximum clamping voltage at 11.9 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA26HE3/73 datasheet, SA26HE3/73 pinout, SA26HE3/73 application, or SA26HE3/73 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1 µA at 26 V), and high surge current capability are required.
Technical Context
The SA26HE3/73 operates as a bi-directional avalanche diode, symmetrically clamping transient voltages above ±28.9 V in either polarity while maintaining <1 µA reverse leakage at its 26 V stand-off rating. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for 10/1000 µs waveform compliance, it delivers 11.9 A peak pulse current with 42.1 V clamping voltage and exhibits a temperature coefficient of +0.03 %/°C for VBR - enabling predictable performance across -55 °C to +175 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 42.1 V at 11.9 A - Clamped voltage during 500 W transient; limits downstream IC stress to safe levels. |
| PPPM | 500 W (10/1000 µs) - Sustains standardized lightning/surge pulses per IEC 61000-4-5 Level 4 without degradation. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +175 °C - Enables placement near hot components (e.g., power MOSFETs, engine control units) without thermal derating. |
| Qualification | AEC-Q101 qualified - Validated for automotive under-hood and chassis applications per stress test requirements. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Bi-directional construction means no polarity marking; both leads are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either lead serves as input/output; bidirectional clamping enables single-device protection on AC or floating lines. |
| Lead 1 | Terminal | Matte tin-plated, solderable per J-STD-002; supports wave/reflow up to 275 °C for 10 s. |
| Lead 2 | Terminal | Identical to Lead 1; no functional distinction - interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| 500 W peak pulse power | Withstands repeated 10/1000 µs surges (e.g., ISO 7637-2 Pulse 1/2/5a) without parametric shift or failure. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance - suitable for high-reliability automotive and industrial assemblies. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Limits voltage excursion to ≤42.1 V during 11.9 A surges, preserving 3.3 V/5 V microcontroller I/O integrity and avoiding latch-up or damage. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring faults and relay coil flyback. IC Role / Device Role / Timing Role: Primary surge suppression device across input terminals, coordinated with upstream fusing and filtering. Use Value: Withstands 500 W transients per IEC 61000-4-4 Level 3, enabling CE-compliant industrial equipment without additional crowbar circuitry. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Guarding DC power feeds (e.g., 24 V PoE-derived rails) in base station remote radio units against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after bulk MOVs to clamp residual high-frequency energy and protect DC-DC converters. Use Value: Fast response time and low clamping voltage prevent overvoltage shutdown of isolated buck regulators feeding FPGAs or RF ICs. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across motor terminals to clamp flyback voltage during PWM switching and mechanical brush arcing. Use Value: 175 °C max junction temperature allows mounting on motor driver PCBs near heat-generating MOSFETs without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Same VWM (26 V), identical DO-214AC package; lower PPPM (400 W), higher VC (45.4 V at 11.1 A). | Less robust for high-energy surges; suited for space-constrained consumer designs where DO-214AC footprint is mandatory. | Select SMAJ26CA only when board area is critical and surge threat level is limited to IEC 61000-4-2 ESD or low-duty-cycle transients. |
| 1.5KE27CA | Higher VWM (27 V), larger DO-201AD package; same 500 W rating but higher clamping (45.7 V at 10.9 A) and slower response due to junction capacitance. | Not AEC-Q101 qualified; intended for industrial/commercial use only; requires more PCB real estate. | Choose 1.5KE27CA for cost-sensitive non-automotive applications where DO-201AD mounting is acceptable and AEC-Q101 is not required. |
Compared with SMAJ26CA and 1.5KE27CA, SA26HE3/73 offers superior automotive qualification, tighter VBR tolerance, lower clamping voltage, and optimized thermal performance in the compact DO-15 form factor - making it the preferred choice for AEC-Q101-compliant designs requiring minimal voltage overshoot and high reliability.
Availability
SA26HE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom power rail safeguarding requiring stable component supply across extended production lifecycles.
Supply support for SA26HE3/73 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, and protection devices with emphasis on reliability, automotive qualification, and application-specific performance.
The SAxxHE3 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom systems where AEC-Q101 compliance and precise clamping behavior are mandatory.
FAQ
What is the polarity configuration of SA26HE3/73?
The SA26HE3/73 is a bi-directional TVS diode with symmetrical terminals - neither lead is marked as anode or cathode. This allows it to clamp voltage transients of either polarity equally, making it ideal for AC-coupled lines, differential buses like CAN, or floating power rails where polarity reversal may occur during fault conditions. The device functions identically regardless of orientation in the circuit.
Does SA26HE3/73 meet automotive qualification standards?
Yes, SA26HE3/73 is AEC-Q101 qualified, as confirmed by Vishay's documentation and the HE3 suffix designation. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics such as engine control modules, body control units, and ADAS sensor interfaces.
What is the maximum clamping voltage of SA26HE3/73 under surge conditions?
The SA26HE3/73 has a maximum clamping voltage (VC) of 42.1 V at 11.9 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during a full-rated 500 W transient event, ensuring downstream components rated for ≤45 V operation remain within safe operating limits.
Can SA26HE3/73 be used in place of a unidirectional TVS like SA26A?
No - SA26HE3/73 is bi-directional and lacks polarity marking, whereas SA26A is unidirectional with a cathode band. Substituting SA26HE3/73 for SA26A would compromise protection on DC-biased lines (e.g., 24 V supply rails) because the bi-directional device conducts in both directions, potentially causing short-circuit behavior if placed across a polarized supply. Always match device polarity to circuit topology.
What packaging and plating specifications apply to SA26HE3/73?
SA26HE3/73 uses a DO-204AC (DO-15) package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The HE3 suffix indicates RoHS compliance and JESD 201 Class 2 whisker resistance - essential for automotive and industrial applications requiring long-term interconnect reliability under thermal cycling and vibration stress.
SA26HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- 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)
SA26HE3/73 FAQ
1.How can I place an order for SA26HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26HE3/73 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 SA26HE3/73 reliable?
The price and inventory of SA26HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26HE3/73 is usually 5 days.
3.What payment methods are accepted for SA26HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26HE3/73?
SA26HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26HE3/73 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 SA26HE3/73?
For technical support, including SA26HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26HE3/73 requirements.
6.How does Aetrix verify that SA26HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA26HE3/73 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 SA26HE3/73 meets industry standards.
7.What is the process for return or replacement of SA26HE3/73?
All SA26HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA26HE3/73, 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 SA26HE3/73 part is unused and in its original packaging.
Return procedure for SA26HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA26HE3/73 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
