My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA28CHE3/73
- Part No.:
- SA28CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA28CHE3/73.pdf
- Description:
- TVS DIODE 28VWM 50.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,358
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA28CHE3/73 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 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 11 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SA28CHE3/73 datasheet, SA28CHE3/73 pinout, SA28CHE3/73 application, or SA28CHE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-204AC mechanical data, and real-world use context for ESD and lightning-induced transient protection in harsh environments.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VC, and leakage characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 µs pulses at 0.01% duty cycle.
The device is rated for -55 °C to +175 °C operating junction temperature, supports 275 °C solder dip per JESD 22-B106, and meets AEC-Q101 stress test requirements - confirming suitability for automotive under-hood and industrial control applications where thermal robustness and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse (or bidirectional) working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 45.4 V at 11 A - Clamped voltage seen by protected circuit during 10/1000 µs transient; limits downstream stress. |
| PPPM | 500 W - Peak pulse power handling capability; enables suppression of high-energy surges like ISO 7637-2 Pulse 5a. |
| IPPM | 11 A - Peak pulse current supported at VC; correlates directly with system-level surge immunity level. |
| TJ max. | +175 °C - Maximum junction temperature; allows operation in high-ambient environments such as engine control units. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC standard. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Bi-directional polarity - no marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No functional polarity - either lead serves as input/output; clamps voltage excursions above ±VBR in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 16750-2 load dump and IEC 61000-4-5 surge events without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive electronics including ADAS sensors, body control modules, and infotainment interfaces. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs like CAN transceivers. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualified, whisker-tested (JESD 201 Class 2), and halogen-free construction per JEDEC JS709A. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine compartments exposed to ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground to limit excursion to ≤45.4 V during 10/1000 µs surges. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC front-ends and microcontroller GPIOs under repeated surge stress. |
Use Scenario: Shielding RS-485 or CAN bus lines in programmable logic controllers subjected to field wiring-induced surges. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) shunt protector across differential pair to clamp common-mode overvoltage. Use Value: Maintains signal integrity by limiting clamping voltage well below receiver absolute maximum ratings while surviving >1000 surge cycles. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Input-stage transient suppression on AC-DC adapter primary-side rectifier outputs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected bi-directional TVS absorbing energy from 10/1000 µs line-to-line transients up to 500 W. Use Value: Eliminates need for bulkier MOVs while providing tighter voltage clamping and faster response than varistors. |
Use Scenario: Secondary-side protection on DSL or POTS line interface circuits exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bi-directional clamp preserving high-frequency signal fidelity up to 1 MHz. Use Value: Enables compliance with GR-1089-CORE Level 3 surge immunity without degrading line impedance or echo return loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28AHE3/A | Uni-directional; 28 V VWM, 31.1–34.4 V VBR, same DO-214AC package but lower 400 W PPPM. | Requires external polarity awareness; unsuitable for AC-coupled or floating differential lines without redesign. | Select when unidirectional clamping suffices and board space allows SMA package; verify layout accommodates cathode orientation. |
| SMCJ28CAHE3/A | Bi-directional; 28 V VWM, 31.1–34.4 V VBR, higher 1500 W PPPM in larger DO-214AB package. | Offers 3× pulse power headroom but requires 3.5 mm × 7.0 mm footprint vs. DO-15's 2.6 mm × 7.6 mm. | Choose for systems requiring extended surge endurance (e.g., outdoor telecom cabinets) where PCB area permits larger package. |
Compared with SMAJ28AHE3/A and SMCJ28CAHE3/A, SA28CHE3/73 delivers optimal balance of bi-directional functionality, AEC-Q101 qualification, compact DO-15 footprint, and 500 W surge capacity - making it ideal for space-constrained automotive and industrial modules where polarity-agnostic protection is mandatory.
Availability
SA28CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply with full traceability and lifecycle management.
Supply support for SA28CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SAxxCH series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and repeatable clamping performance are essential.
FAQ
What is the key difference between SA28CHE3/73 and uni-directional SA28AHE3/73?
The SA28CHE3/73 is bi-directional, meaning it clamps voltage transients equally in both polarities - critical for AC-coupled, floating, or differential signal paths. In contrast, SA28AHE3/73 is uni-directional and only protects against reverse-biased overvoltage; using it in place of SA28CHE3/73 would leave one polarity unprotected. Both share identical VWM, VBR, and VC specs, but SA28CHE3/73 has no polarity marking and must be used without regard to lead orientation.
Does SA28CHE3/73 meet automotive qualification standards?
Yes, SA28CHE3/73 carries the HE3 suffix, which denotes full AEC-Q101 qualification per Vishay documentation (Document Number 88378, Revision 18-Sep-12). This includes stress testing for high-temperature operating life, temperature cycling, unbiased highly accelerated stress test, and ESD per HBM and CDM models - confirming suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SA28CHE3/73 under surge conditions?
The maximum clamping voltage (VC) of SA28CHE3/73 is 45.4 V, measured at its rated peak pulse current (IPPM) of 11 A using the standard 10/1000 µs waveform. This value represents the highest voltage the protected circuit will experience during a worst-case transient event, and is confirmed in the Electrical Characteristics table on page 2 of the Vishay datasheet.
Can SA28CHE3/73 replace older SA28CA parts in existing designs?
Yes, SA28CHE3/73 is a direct replacement for SA28CA in most cases: both are bi-directional DO-204AC devices with identical VWM, VBR, and VC specifications. The HE3 suffix adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - enhancing reliability without altering electrical behavior or footprint. No PCB changes are required.
What packaging and plating does SA28CHE3/73 use?
SA28CHE3/73 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 confirms RoHS compliance, AEC-Q101 qualification, and JESD 201 Class 2 whisker resistance - distinguishing it from commercial-grade E3 variants.
SA28CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50.1V
- Current - Peak Pulse (10/1000µs):
- 10A
- 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)
SA28CHE3/73 FAQ
1.How can I place an order for SA28CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA28CHE3/73 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 SA28CHE3/73 reliable?
The price and inventory of SA28CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA28CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA28CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA28CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA28CHE3/73?
SA28CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA28CHE3/73 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 SA28CHE3/73?
For technical support, including SA28CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA28CHE3/73 requirements.
6.How does Aetrix verify that SA28CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA28CHE3/73 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 SA28CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA28CHE3/73?
All SA28CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA28CHE3/73, 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 SA28CHE3/73 part is unused and in its original packaging.
Return procedure for SA28CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA28CHE3/73 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
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 …
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…
