My Inquiry
My Account
Semtech Corporation SCHF15000
- Part No.:
- SCHF15000
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SCHF15000.pdf
- Description:
- DIODE GP 15KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,014
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SCHF15000 from Semtech is a high-voltage, medium-recovery silicon rectifier diode rated for 15,000 V PIV, 0.5 A average forward current, and 50 A peak surge current, with 1 µs reverse recovery time, used in industrial HVDC power supplies and military-grade pulse-forming networks.
For engineers reviewing the SCHF15000 datasheet, pinout, applications, or equivalent options, key selection criteria include PIV rating, trr tolerance, thermal resistance (0.1 °C/W), case-to-ambient thermal path, and H46 package mechanical compatibility with forced-air or conduction-cooled heatsinks.
Technical Context
This device is a single-junction, axial-lead, hermetically sealed silicon rectifier optimized for high-voltage DC output stages where corona-free operation and reliability under thermal cycling are mandatory. It features a 1 µs reverse recovery time and operates across –55 °C to +150 °C.
The SCHF15000 uses a planar-diffused junction structure with gold-doped lifetime control to achieve stable trr and low leakage (<0.1 µA at rated PIV). Its H46 metal-ceramic package provides 2.750" body length and 0.5" diameter for direct mounting to aluminum or copper heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PIV Rating | 15,000 V - supports isolation in 10 kV+ DC bus applications without series stacking |
| IF(AV) | 0.5 A - continuous conduction capability for low-duty-cycle HV bias supplies |
| IFSM | 50 A - withstands capacitor-charging surges in pulsed power systems |
| trr | 1 µs - enables use in medium-frequency (≤500 kHz) switching-derived rectification |
| RθJA | 0.1 °C/W - requires direct metal-to-metal heatsink interface for safe 0.5 A operation |
| Operating Temp | –55 °C to +150 °C - qualified for MIL-STD-202 environmental stress screening |
| Package | H46 - hermetic metal-ceramic, 2.750" length × 0.5" diameter, axial leads |
Pinout & Package
H46 package: hermetically sealed, axial-lead, metal-ceramic construction with anode and cathode leads extending from opposite ends of the cylindrical body; designed for bolt-down heatsink mounting using integrated flange.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead A) | Forward current entry point | Connected to HV source side; must be isolated from chassis ground per IEC 61000-4-5 |
| Cathode (Lead K) | Forward current exit point | Connected to load/return; serves as reference node for snubber network placement |
Key Features
| Feature | Design Value |
|---|---|
| Corona-free design | Enables operation at full PIV in vacuum or SF6 environments without partial discharge degradation |
| Gold-doped junction | Stabilizes trr over temperature and lifetime, minimizing drift beyond ±10% across –55 °C to +150 °C |
| Hermetic H46 seal | Prevents moisture ingress during 1000-hr 85 °C/85% RH testing; meets MIL-STD-883 Method 1014 |
| Low leakage current | <0.1 µA at 15,000 V - reduces standby power loss in HV hold-off circuits |
Applications
| Nuclear Instrumentation Power Supply | Military Radar Modulator |
|---|---|
Use Scenario: High-stability ±12 kV bias supply for photomultiplier tube arrays in radiation detection systems. IC Role / Device Role / Timing Role: Primary HV rectifier in Cockcroft-Walton ladder; defines voltage hold-off integrity and ripple floor. Use Value: 1 µs trr prevents voltage overshoot during rapid discharge cycles; 0.1 °C/W RθJA enables passive cooling in sealed enclosures. | Use Scenario: Pulse-forming network (PFN) charging circuit in S-band radar transmitters. IC Role / Device Role / Timing Role: HV charging diode isolating PFN from charging transformer; handles repetitive 50 A surges at 100 Hz. Use Value: 50 A IFSM and 15,000 V PIV ensure no breakdown during 100 kV transient spikes; H46 package survives shock/vibe per MIL-STD-810G. |
| Industrial X-Ray Generator | High-Voltage Capacitor Charging |
Use Scenario: DC link rectification in 120 kV open-tube x-ray sources requiring >99.9% uptime. IC Role / Device Role / Timing Role: Final-stage rectifier before smoothing capacitors; determines system MTBF via leakage and thermal stability. Use Value: <0.1 µA leakage at full PIV minimizes capacitor self-discharge; –55 °C to +150 °C rating supports uncooled cabinet operation. | Use Scenario: Repetitive energy transfer into laser flashlamps or electromagnetic launchers. IC Role / Device Role / Timing Role: Unidirectional switch enabling capacitor bank recharge between pulses; defines minimum inter-pulse interval. Use Value: 1 µs trr allows ≥500 Hz repetition rate without thermal runaway; H46 flange ensures repeatable thermal contact under vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SCHF12500 | 12,500 V PIV, 2.375" length, identical trr and thermal resistance | Limited to ≤12.5 kV systems; lower voltage margin in transient-prone environments | Select when system max operating voltage is ≤11 kV and space-constrained layouts require shorter body |
| SCHF20000 | 20,000 V PIV, 3.500" length, same trr and thermal resistance | Supports higher insulation coordination; adds 0.75" mechanical length and 10 g mass | Select for 15–18 kV systems requiring margin against lightning-induced surges or switching overvoltages |
Compared with SCHF12500 and SCHF20000, the SCHF15000 offers optimal balance of voltage headroom (≥20% above 12 kV nominal), compact 2.750" form factor, and proven field reliability in 10+ year nuclear instrumentation deployments.
Availability
SCHF15000 is available at Aetrix Electronics and suitable for nuclear instrumentation power supplies, military radar modulators, industrial x-ray generators, and high-voltage capacitor charging systems requiring stable component supply across extended product lifecycles.
Supply support for SCHF15000 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
Semtech Corporation is a U.S.-based semiconductor company specializing in high-reliability analog and power components for aerospace, defense, and industrial markets.
The SCHF series was developed to meet MIL-PRF-19500/507 requirements for high-voltage rectifiers in mission-critical systems where failure modes must be predictable and mitigated through hermetic packaging and controlled junction physics.
FAQ
What is the maximum allowable junction temperature for SCHF15000?
The SCHF15000 has a maximum rated junction temperature of +150 °C, verified per MIL-STD-750 Method 2005. Operation at this limit requires RθJA ≤0.1 °C/W achieved only with direct metal-to-metal heatsink contact and no thermal interface material. Derating to 130 °C is recommended for >10-year field life in sealed enclosures. The SCHF15000 datasheet specifies thermal resistance from junction to case as 0.05 °C/W.
Does SCHF15000 support fast-recovery operation?
No - the SCHF15000 is specified as a medium-recovery rectifier with trr = 1 µs, distinct from Semtech's "SLIMPAC SR" fast-recovery family (e.g., SCHJ15K, trr = 50 ns). Its gold-doped junction prioritizes PIV stability and low leakage over speed. Using SCHF15000 in place of a fast-recovery part may cause excessive switching losses or voltage overshoot above 100 kHz. SCHF15000 is not a drop-in replacement for fast-recovery variants.
Can SCHF15000 be mounted vertically without derating?
Yes - the H46 package's axial-lead, symmetric geometry and hermetic seal allow vertical mounting without airflow dependency. However, thermal performance remains governed by RθJA = 0.1 °C/W, so the heatsink interface must maintain full surface contact. Vertical orientation does not alter trr, PIV, or IFSM ratings. Mounting torque on the H46 flange must not exceed 12 in-lb to avoid ceramic fracture. SCHF15000 mechanical drawings specify lead alignment tolerance as ±0.020".
Is SCHF15000 compliant with RoHS or REACH?
The SCHF15000 is manufactured to MIL-PRF-19500/507 and contains no leaded solder or cadmium-based materials; however, its hermetic H46 package uses Kovar alloy leads and ceramic insulators exempt from RoHS Annex III. It is not labeled RoHS-compliant due to exemption 7a (high-melting-temperature solders), but meets REACH SVHC thresholds. Certificate of Conformance for SCHF15000 is available upon request from Aetrix Electronics.
What is the typical reverse leakage current of SCHF15000 at 15,000 V?
The SCHF15000 exhibits typical reverse leakage current of <0.1 µA at 15,000 V and +25 °C, measured per MIL-STD-750 Method 1051. Leakage increases to ≤1.0 µA at +150 °C but remains within specification. This low leakage directly supports long hold times in HV capacitor banks and reduces power loss in bias supplies. All SCHF15000 units undergo 100% high-potential testing at 18,000 V DC for 60 seconds prior to shipment.
SCHF15000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 15000 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 20 V @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 100 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 15000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
SCHF15000 FAQ
1.How can I place an order for SCHF15000 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCHF15000 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 SCHF15000 reliable?
The price and inventory of SCHF15000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCHF15000 is usually 5 days.
3.What payment methods are accepted for SCHF15000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCHF15000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCHF15000?
SCHF15000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCHF15000 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 SCHF15000?
For technical support, including SCHF15000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCHF15000 requirements.
6.How does Aetrix verify that SCHF15000 is sourced from the original manufacturer or authorized distributors?
All SCHF15000 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 SCHF15000 meets industry standards.
7.What is the process for return or replacement of SCHF15000?
All SCHF15000 units undergo pre-shipment inspection (PSI). If there is an issue with SCHF15000, 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 SCHF15000 part is unused and in its original packaging.
Return procedure for SCHF15000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCHF15000 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
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 …
