GB/T 33768-2017 in English
VALIDRfeliability test method for optoelectronic devices used in telecommunications
- Issued on:2017-05-31
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 33768-2017通信用光电子器件可靠性试验方法》由339-2（工业和信息化部（通信））归口，主管部门为工业和信息化部（通信）。
Introduction
Core content structure of the standard
| Test category | Test item | Typical parameters | Failure criteria |
|---|---|---|---|
| Mechanical integrity | Mechanical shock | 300-2000g acceleration | Parameter change＞20% |
| Fiber tension | 4.9-9.8N | Fiber breakage/displacement | |
| Thermal shock | -40℃~85℃ | Seal failure | |
| Environmental test | High temperature storage | 85℃/2000h | Photoelectric property degradation |
| Constant humidity and heat | 85℃/85%RH | Corrosion area＞5% |
Analysis of key technical points
Innovative design of sampling scheme: The standard adopts the LTPD (lot allowable non-conforming rate) sampling model. When LTPD=10, 22 pieces are sampled for the first time. If 1 piece is found to be unqualified, 16 pieces are added for re-testing. The secondary sampling mechanism significantly reduces the risk of misjudgment.
ESD test requirements for optoelectronic modules are strictly differentiated:
1. Threshold test (human body model): grading judgment 0-3B level (250V-8000V)
2. Immunity test: contact discharge up to 8kV, air discharge 15kV
Standard evolution and implementation suggestions
Compared with the old version of the standard, GB/T 33768-2017 mainly strengthens:
1. Added special test of torsion/lateral tension for optical fiber devices
2. Introduced lead-free solder solderability test (Sn95.5Ag3.9Cu0.6 alloy)
3. Improved flammability classification standards (V-0/V-1/V-2)
Implementation precautions:
1. The mechanical test needs to ensure that the fixture is rigidly fixed to avoid "secondary impact"
2. The heating and cooling rate of the temperature cycle test needs to be ≥10℃/min
3. The sealing test needs to be performed with a fine leak check (nitrogen mass spectrometer) first and then a rough leak check (fluorine oil method)
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